chore(release): v0.1.15

Move Check for Updates into the macOS app menu and add Settings (Cmd+,),
Save (Cmd+S), Find (Cmd+F), chapter navigation, and a Help > Report an
Issue link. Route new menu actions through menu-action events and trim
duplicate editor keybindings.

.github/workflows/release.yml

@@ -85,7 +85,7 @@ jobs:
       fail-fast: false
       matrix:
         include:
-          - os: macos-latest
+          - os: macos-26
             args: "--target universal-apple-darwin --config src-tauri/tauri.release.conf.json"
             rust-targets: "aarch64-apple-darwin,x86_64-apple-darwin"
           - os: ubuntu-latest
@@ -137,6 +137,19 @@ jobs:
       - name: Install frontend dependencies
         run: pnpm install --frozen-lockfile
 
+      - name: Provision Google credentials
+        shell: bash
+        env:
+          GOOGLE_CREDENTIALS: ${{ secrets.GOOGLE_CREDENTIALS }}
+        run: |
+          if [ -n "$GOOGLE_CREDENTIALS" ]; then
+            printf '%s' "$GOOGLE_CREDENTIALS" > google-credentials.json
+            echo "Wrote google-credentials.json from GOOGLE_CREDENTIALS secret."
+          else
+            cp google-credentials.example.json google-credentials.json
+            echo "::warning::GOOGLE_CREDENTIALS secret not set — embedding placeholder credentials; Google Drive backup will be disabled in this release."
+          fi
+
       - name: Build and upload
         uses: tauri-apps/tauri-action@v0
         env:

.gitignore

@@ -26,6 +26,10 @@ dist-ssr
 # Tauri build output
 src-tauri/target/
 
+# Google OAuth desktop client (real values, never commit)
+/google-credentials.json
+/client_secret_*.json
+
 # Screenshots & Playwright MCP artifacts
 .playwright-mcp/
 /*.png

CLAUDE.md

@@ -10,7 +10,7 @@
 
 ## Git Commit Rules
 
+  - Do not make branches, commit in main only
   - Use conventional commit format: `feat|fix|refactor|docs|test|chore|ci(scope): message`
   - Never use `git add .` or `git add -A`. Always stage specific files by name.
   - Don't batch multiple unrelated changes into one commit.
-  - Commit early and often. A working 5-line change is better than a pending 200-line change.

README.md

@@ -1,37 +1,3 @@
 # margin
 
-An offline desktop app for writing books and exporting them to print-ready PDF and reflowable EPUB — a focused, free alternative to InDesign for text-first books (novels, non-fiction).
-
-## Stack
-
-- **Tauri 2** (Rust shell) — offline by construction; the entire export pipeline runs locally, nothing hits the network.
-- **React + TipTap** — the semantic writing surface.
-- **Typst** (embedded as a Rust crate) — print-ready PDF with real book typography.
-- **Built-in EPUB3** generator + zip packager.
-
-One semantic document feeds three renderers — the editor, the PDF, and the EPUB — from a single design-token theme (**Quiet Press**: Literata for the page, Hanken Grotesk for the chrome). Both fonts are bundled.
-
-## Develop
-
-```sh
-pnpm install
-pnpm tauri dev     # the real desktop app: live PDF dock, file dialogs, PDF/EPUB export
-pnpm dev           # browser-only UI preview (Tauri APIs are inert)
-```
-
-The first `tauri dev` build is slow because it compiles Typst.
-
-## Using it
-
-- A book saves as a single `.margin` file (JSON). Open / Save with ⌘O / ⌘S.
-- Click the title in the top bar for **Book setup** (title, author, ISBN, trim size, language).
-- Insert images from the toolbar and choose a placement (inline / full-width / full-page / float).
-- Export to **PDF** or **EPUB** from the titlebar menu.
-
-## Layout
-
-- `src/editor/` — TipTap editor, extensions, figure block, floating toolbar.
-- `src/components/` — app shell, preview dock, book-setup panel, pdf.js renderer.
-- `src/export/` — `typst.ts` (book → Typst source), `epub.ts` (book → EPUB3 files), `exporters.ts`.
-- `src/store/`, `src/model/` — document model and state.
-- `src-tauri/src/` — `pdf.rs` (Typst compile), `epub.rs` (zip packager), `project.rs` (file IO).
+Write your book. Own every word. A calm, offline studio to write, format, and publish your book to every store and to print.

google-credentials.example.json

@@ -0,0 +1,11 @@
+{
+  "installed": {
+    "client_id": "YOUR_CLIENT_ID.apps.googleusercontent.com",
+    "project_id": "your-project-id",
+    "auth_uri": "https://accounts.google.com/o/oauth2/auth",
+    "token_uri": "https://oauth2.googleapis.com/token",
+    "auth_provider_x509_cert_url": "https://www.googleapis.com/oauth2/v1/certs",
+    "client_secret": "YOUR_CLIENT_SECRET",
+    "redirect_uris": ["http://127.0.0.1"]
+  }
+}

index.html

@@ -2,7 +2,7 @@
 <html lang="en">
   <head>
     <meta charset="UTF-8" />
-    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no, viewport-fit=cover" />
     <link rel="icon" type="image/png" href="/margin-mark.png" />
     <script>
       (function () {

package.json

@@ -1,7 +1,7 @@
 {
   "name": "margin-app",
   "private": true,
-  "version": "0.1.3",
+  "version": "0.1.15",
   "type": "module",
   "scripts": {
     "dev": "vite",

public/fonts/EBGaramond-OFL.txt

@@ -0,0 +1,93 @@
+Copyright 2017 The EB Garamond Project Authors (https://github.com/octaviopardo/EBGaramond12)
+
+This Font Software is licensed under the SIL Open Font License, Version 1.1.
+This license is copied below, and is also available with a FAQ at:
+https://openfontlicense.org
+
+
+-----------------------------------------------------------
+SIL OPEN FONT LICENSE Version 1.1 - 26 February 2007
+-----------------------------------------------------------
+
+PREAMBLE
+The goals of the Open Font License (OFL) are to stimulate worldwide
+development of collaborative font projects, to support the font creation
+efforts of academic and linguistic communities, and to provide a free and
+open framework in which fonts may be shared and improved in partnership
+with others.
+
+The OFL allows the licensed fonts to be used, studied, modified and
+redistributed freely as long as they are not sold by themselves. The
+fonts, including any derivative works, can be bundled, embedded, 
+redistributed and/or sold with any software provided that any reserved
+names are not used by derivative works. The fonts and derivatives,
+however, cannot be released under any other type of license. The
+requirement for fonts to remain under this license does not apply
+to any document created using the fonts or their derivatives.
+
+DEFINITIONS
+"Font Software" refers to the set of files released by the Copyright
+Holder(s) under this license and clearly marked as such. This may
+include source files, build scripts and documentation.
+
+"Reserved Font Name" refers to any names specified as such after the
+copyright statement(s).
+
+"Original Version" refers to the collection of Font Software components as
+distributed by the Copyright Holder(s).
+
+"Modified Version" refers to any derivative made by adding to, deleting,
+or substituting -- in part or in whole -- any of the components of the
+Original Version, by changing formats or by porting the Font Software to a
+new environment.
+
+"Author" refers to any designer, engineer, programmer, technical
+writer or other person who contributed to the Font Software.
+
+PERMISSION & CONDITIONS
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of the Font Software, to use, study, copy, merge, embed, modify,
+redistribute, and sell modified and unmodified copies of the Font
+Software, subject to the following conditions:
+
+1) Neither the Font Software nor any of its individual components,
+in Original or Modified Versions, may be sold by itself.
+
+2) Original or Modified Versions of the Font Software may be bundled,
+redistributed and/or sold with any software, provided that each copy
+contains the above copyright notice and this license. These can be
+included either as stand-alone text files, human-readable headers or
+in the appropriate machine-readable metadata fields within text or
+binary files as long as those fields can be easily viewed by the user.
+
+3) No Modified Version of the Font Software may use the Reserved Font
+Name(s) unless explicit written permission is granted by the corresponding
+Copyright Holder. This restriction only applies to the primary font name as
+presented to the users.
+
+4) The name(s) of the Copyright Holder(s) or the Author(s) of the Font
+Software shall not be used to promote, endorse or advertise any
+Modified Version, except to acknowledge the contribution(s) of the
+Copyright Holder(s) and the Author(s) or with their explicit written
+permission.
+
+5) The Font Software, modified or unmodified, in part or in whole,
+must be distributed entirely under this license, and must not be
+distributed under any other license. The requirement for fonts to
+remain under this license does not apply to any document created
+using the Font Software.
+
+TERMINATION
+This license becomes null and void if any of the above conditions are
+not met.
+
+DISCLAIMER
+THE FONT SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT
+OF COPYRIGHT, PATENT, TRADEMARK, OR OTHER RIGHT. IN NO EVENT SHALL THE
+COPYRIGHT HOLDER BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+INCLUDING ANY GENERAL, SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL
+DAMAGES, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF THE USE OR INABILITY TO USE THE FONT SOFTWARE OR FROM
+OTHER DEALINGS IN THE FONT SOFTWARE.

public/fonts/Fraunces-OFL.txt

@@ -0,0 +1,93 @@
+Copyright 2018 The Fraunces Project Authors (https://github.com/undercasetype/Fraunces)
+
+This Font Software is licensed under the SIL Open Font License, Version 1.1.
+This license is copied below, and is also available with a FAQ at:
+http://scripts.sil.org/OFL
+
+
+-----------------------------------------------------------
+SIL OPEN FONT LICENSE Version 1.1 - 26 February 2007
+-----------------------------------------------------------
+
+PREAMBLE
+The goals of the Open Font License (OFL) are to stimulate worldwide
+development of collaborative font projects, to support the font creation
+efforts of academic and linguistic communities, and to provide a free and
+open framework in which fonts may be shared and improved in partnership
+with others.
+
+The OFL allows the licensed fonts to be used, studied, modified and
+redistributed freely as long as they are not sold by themselves. The
+fonts, including any derivative works, can be bundled, embedded, 
+redistributed and/or sold with any software provided that any reserved
+names are not used by derivative works. The fonts and derivatives,
+however, cannot be released under any other type of license. The
+requirement for fonts to remain under this license does not apply
+to any document created using the fonts or their derivatives.
+
+DEFINITIONS
+"Font Software" refers to the set of files released by the Copyright
+Holder(s) under this license and clearly marked as such. This may
+include source files, build scripts and documentation.
+
+"Reserved Font Name" refers to any names specified as such after the
+copyright statement(s).
+
+"Original Version" refers to the collection of Font Software components as
+distributed by the Copyright Holder(s).
+
+"Modified Version" refers to any derivative made by adding to, deleting,
+or substituting -- in part or in whole -- any of the components of the
+Original Version, by changing formats or by porting the Font Software to a
+new environment.
+
+"Author" refers to any designer, engineer, programmer, technical
+writer or other person who contributed to the Font Software.
+
+PERMISSION & CONDITIONS
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of the Font Software, to use, study, copy, merge, embed, modify,
+redistribute, and sell modified and unmodified copies of the Font
+Software, subject to the following conditions:
+
+1) Neither the Font Software nor any of its individual components,
+in Original or Modified Versions, may be sold by itself.
+
+2) Original or Modified Versions of the Font Software may be bundled,
+redistributed and/or sold with any software, provided that each copy
+contains the above copyright notice and this license. These can be
+included either as stand-alone text files, human-readable headers or
+in the appropriate machine-readable metadata fields within text or
+binary files as long as those fields can be easily viewed by the user.
+
+3) No Modified Version of the Font Software may use the Reserved Font
+Name(s) unless explicit written permission is granted by the corresponding
+Copyright Holder. This restriction only applies to the primary font name as
+presented to the users.
+
+4) The name(s) of the Copyright Holder(s) or the Author(s) of the Font
+Software shall not be used to promote, endorse or advertise any
+Modified Version, except to acknowledge the contribution(s) of the
+Copyright Holder(s) and the Author(s) or with their explicit written
+permission.
+
+5) The Font Software, modified or unmodified, in part or in whole,
+must be distributed entirely under this license, and must not be
+distributed under any other license. The requirement for fonts to
+remain under this license does not apply to any document created
+using the Font Software.
+
+TERMINATION
+This license becomes null and void if any of the above conditions are
+not met.
+
+DISCLAIMER
+THE FONT SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT
+OF COPYRIGHT, PATENT, TRADEMARK, OR OTHER RIGHT. IN NO EVENT SHALL THE
+COPYRIGHT HOLDER BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+INCLUDING ANY GENERAL, SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL
+DAMAGES, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF THE USE OR INABILITY TO USE THE FONT SOFTWARE OR FROM
+OTHER DEALINGS IN THE FONT SOFTWARE.

public/fonts/Lora-OFL.txt

@@ -0,0 +1,93 @@
+Copyright 2011 The Lora Project Authors (https://github.com/cyrealtype/Lora-Cyrillic), with Reserved Font Name "Lora".
+
+This Font Software is licensed under the SIL Open Font License, Version 1.1.
+This license is copied below, and is also available with a FAQ at:
+https://scripts.sil.org/OFL
+
+
+-----------------------------------------------------------
+SIL OPEN FONT LICENSE Version 1.1 - 26 February 2007
+-----------------------------------------------------------
+
+PREAMBLE
+The goals of the Open Font License (OFL) are to stimulate worldwide
+development of collaborative font projects, to support the font creation
+efforts of academic and linguistic communities, and to provide a free and
+open framework in which fonts may be shared and improved in partnership
+with others.
+
+The OFL allows the licensed fonts to be used, studied, modified and
+redistributed freely as long as they are not sold by themselves. The
+fonts, including any derivative works, can be bundled, embedded, 
+redistributed and/or sold with any software provided that any reserved
+names are not used by derivative works. The fonts and derivatives,
+however, cannot be released under any other type of license. The
+requirement for fonts to remain under this license does not apply
+to any document created using the fonts or their derivatives.
+
+DEFINITIONS
+"Font Software" refers to the set of files released by the Copyright
+Holder(s) under this license and clearly marked as such. This may
+include source files, build scripts and documentation.
+
+"Reserved Font Name" refers to any names specified as such after the
+copyright statement(s).
+
+"Original Version" refers to the collection of Font Software components as
+distributed by the Copyright Holder(s).
+
+"Modified Version" refers to any derivative made by adding to, deleting,
+or substituting -- in part or in whole -- any of the components of the
+Original Version, by changing formats or by porting the Font Software to a
+new environment.
+
+"Author" refers to any designer, engineer, programmer, technical
+writer or other person who contributed to the Font Software.
+
+PERMISSION & CONDITIONS
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of the Font Software, to use, study, copy, merge, embed, modify,
+redistribute, and sell modified and unmodified copies of the Font
+Software, subject to the following conditions:
+
+1) Neither the Font Software nor any of its individual components,
+in Original or Modified Versions, may be sold by itself.
+
+2) Original or Modified Versions of the Font Software may be bundled,
+redistributed and/or sold with any software, provided that each copy
+contains the above copyright notice and this license. These can be
+included either as stand-alone text files, human-readable headers or
+in the appropriate machine-readable metadata fields within text or
+binary files as long as those fields can be easily viewed by the user.
+
+3) No Modified Version of the Font Software may use the Reserved Font
+Name(s) unless explicit written permission is granted by the corresponding
+Copyright Holder. This restriction only applies to the primary font name as
+presented to the users.
+
+4) The name(s) of the Copyright Holder(s) or the Author(s) of the Font
+Software shall not be used to promote, endorse or advertise any
+Modified Version, except to acknowledge the contribution(s) of the
+Copyright Holder(s) and the Author(s) or with their explicit written
+permission.
+
+5) The Font Software, modified or unmodified, in part or in whole,
+must be distributed entirely under this license, and must not be
+distributed under any other license. The requirement for fonts to
+remain under this license does not apply to any document created
+using the Font Software.
+
+TERMINATION
+This license becomes null and void if any of the above conditions are
+not met.
+
+DISCLAIMER
+THE FONT SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT
+OF COPYRIGHT, PATENT, TRADEMARK, OR OTHER RIGHT. IN NO EVENT SHALL THE
+COPYRIGHT HOLDER BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+INCLUDING ANY GENERAL, SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL
+DAMAGES, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF THE USE OR INABILITY TO USE THE FONT SOFTWARE OR FROM
+OTHER DEALINGS IN THE FONT SOFTWARE.

public/fonts/SourceSerif4-OFL.txt

@@ -0,0 +1,93 @@
+Copyright 2014 The Source Serif 4 Project Authors (https://github.com/adobe-fonts/source-serif)
+
+This Font Software is licensed under the SIL Open Font License, Version 1.1.
+This license is copied below, and is also available with a FAQ at:
+https://openfontlicense.org
+
+
+-----------------------------------------------------------
+SIL OPEN FONT LICENSE Version 1.1 - 26 February 2007
+-----------------------------------------------------------
+
+PREAMBLE
+The goals of the Open Font License (OFL) are to stimulate worldwide
+development of collaborative font projects, to support the font creation
+efforts of academic and linguistic communities, and to provide a free and
+open framework in which fonts may be shared and improved in partnership
+with others.
+
+The OFL allows the licensed fonts to be used, studied, modified and
+redistributed freely as long as they are not sold by themselves. The
+fonts, including any derivative works, can be bundled, embedded, 
+redistributed and/or sold with any software provided that any reserved
+names are not used by derivative works. The fonts and derivatives,
+however, cannot be released under any other type of license. The
+requirement for fonts to remain under this license does not apply
+to any document created using the fonts or their derivatives.
+
+DEFINITIONS
+"Font Software" refers to the set of files released by the Copyright
+Holder(s) under this license and clearly marked as such. This may
+include source files, build scripts and documentation.
+
+"Reserved Font Name" refers to any names specified as such after the
+copyright statement(s).
+
+"Original Version" refers to the collection of Font Software components as
+distributed by the Copyright Holder(s).
+
+"Modified Version" refers to any derivative made by adding to, deleting,
+or substituting -- in part or in whole -- any of the components of the
+Original Version, by changing formats or by porting the Font Software to a
+new environment.
+
+"Author" refers to any designer, engineer, programmer, technical
+writer or other person who contributed to the Font Software.
+
+PERMISSION & CONDITIONS
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of the Font Software, to use, study, copy, merge, embed, modify,
+redistribute, and sell modified and unmodified copies of the Font
+Software, subject to the following conditions:
+
+1) Neither the Font Software nor any of its individual components,
+in Original or Modified Versions, may be sold by itself.
+
+2) Original or Modified Versions of the Font Software may be bundled,
+redistributed and/or sold with any software, provided that each copy
+contains the above copyright notice and this license. These can be
+included either as stand-alone text files, human-readable headers or
+in the appropriate machine-readable metadata fields within text or
+binary files as long as those fields can be easily viewed by the user.
+
+3) No Modified Version of the Font Software may use the Reserved Font
+Name(s) unless explicit written permission is granted by the corresponding
+Copyright Holder. This restriction only applies to the primary font name as
+presented to the users.
+
+4) The name(s) of the Copyright Holder(s) or the Author(s) of the Font
+Software shall not be used to promote, endorse or advertise any
+Modified Version, except to acknowledge the contribution(s) of the
+Copyright Holder(s) and the Author(s) or with their explicit written
+permission.
+
+5) The Font Software, modified or unmodified, in part or in whole,
+must be distributed entirely under this license, and must not be
+distributed under any other license. The requirement for fonts to
+remain under this license does not apply to any document created
+using the Font Software.
+
+TERMINATION
+This license becomes null and void if any of the above conditions are
+not met.
+
+DISCLAIMER
+THE FONT SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT
+OF COPYRIGHT, PATENT, TRADEMARK, OR OTHER RIGHT. IN NO EVENT SHALL THE
+COPYRIGHT HOLDER BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+INCLUDING ANY GENERAL, SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL
+DAMAGES, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF THE USE OR INABILITY TO USE THE FONT SOFTWARE OR FROM
+OTHER DEALINGS IN THE FONT SOFTWARE.

src-tauri/Cargo.lock

@@ -3089,8 +3089,10 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ff2abc00be7fca6ebc474524697ae276ad847ad0a6b3faa4bcb027e9a4614ad0"
 dependencies = [
  "cfg-if",
+ "js-sys",
  "libc",
  "wasi",
+ "wasm-bindgen",
 ]
 
 [[package]]
@@ -3754,6 +3756,7 @@ dependencies = [
  "tokio",
  "tokio-rustls",
  "tower-service",
+ "webpki-roots",
 ]
 
 [[package]]
@@ -4632,6 +4635,12 @@ dependencies = [
  "hashbrown 0.17.1",
 ]
 
+[[package]]
+name = "lru-slab"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "112b39cec0b298b6c1999fee3e31427f74f676e4cb9879ed1a121b43661a4154"
+
 [[package]]
 name = "lzma-rs"
 version = "0.3.0"
@@ -4704,12 +4713,19 @@ checksum = "3e2e65a1a2e43cfcb47a895c4c8b10d1f4a61097f9f254f183aee60cad9c651d"
 
 [[package]]
 name = "margin-app"
-version = "0.1.3"
+version = "0.1.12"
 dependencies = [
  "base64 0.22.1",
+ "fontdb",
  "harper-core",
+ "objc2",
+ "objc2-app-kit",
+ "objc2-foundation",
+ "rand 0.8.6",
+ "reqwest 0.12.28",
  "serde",
  "serde_json",
+ "sha2",
  "spellbook",
  "tauri",
  "tauri-build",
@@ -4720,6 +4736,7 @@ dependencies = [
  "typst",
  "typst-as-lib",
  "typst-pdf",
+ "url",
  "zip 2.4.2",
 ]
 
@@ -5124,9 +5141,17 @@ checksum = "d49e936b501e5c5bf01fda3a9452ff86dc3ea98ad5f283e1455153142d97518c"
 dependencies = [
  "bitflags 2.13.0",
  "block2",
+ "libc",
  "objc2",
+ "objc2-cloud-kit",
+ "objc2-core-data",
  "objc2-core-foundation",
+ "objc2-core-graphics",
+ "objc2-core-image",
+ "objc2-core-text",
+ "objc2-core-video",
  "objc2-foundation",
+ "objc2-quartz-core",
 ]
 
 [[package]]
@@ -5146,6 +5171,7 @@ version = "0.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0b402a653efbb5e82ce4df10683b6b28027616a2715e90009947d50b8dd298fa"
 dependencies = [
+ "bitflags 2.13.0",
  "objc2",
  "objc2-foundation",
 ]
@@ -5206,6 +5232,19 @@ dependencies = [
  "objc2-core-graphics",
 ]
 
+[[package]]
+name = "objc2-core-video"
+version = "0.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d425caf1df73233f29fd8a5c3e5edbc30d2d4307870f802d18f00d83dc5141a6"
+dependencies = [
+ "bitflags 2.13.0",
+ "objc2",
+ "objc2-core-foundation",
+ "objc2-core-graphics",
+ "objc2-io-surface",
+]
+
 [[package]]
 name = "objc2-encode"
 version = "4.1.0"
@@ -5966,6 +6005,61 @@ dependencies = [
  "memchr",
 ]
 
+[[package]]
+name = "quinn"
+version = "0.11.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0c1a41e437b6bbd489372cd4971de128e85c855f56c57f283d20ff016cf7c0a8"
+dependencies = [
+ "bytes",
+ "cfg_aliases",
+ "pin-project-lite",
+ "quinn-proto",
+ "quinn-udp",
+ "rustc-hash 2.1.2",
+ "rustls",
+ "socket2",
+ "thiserror 2.0.18",
+ "tokio",
+ "tracing",
+ "web-time",
+]
+
+[[package]]
+name = "quinn-proto"
+version = "0.11.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4fcb935c5bec503c2f0e306bdd3e58bb9029dcb14fa8d9ac76e3a5256ac0763e"
+dependencies = [
+ "bytes",
+ "getrandom 0.3.4",
+ "lru-slab",
+ "rand 0.9.4",
+ "ring",
+ "rustc-hash 2.1.2",
+ "rustls",
+ "rustls-pki-types",
+ "slab",
+ "thiserror 2.0.18",
+ "tinyvec",
+ "tracing",
+ "web-time",
+]
+
+[[package]]
+name = "quinn-udp"
+version = "0.5.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "addec6a0dcad8a8d96a771f815f0eaf55f9d1805756410b39f5fa81332574cbd"
+dependencies = [
+ "cfg_aliases",
+ "libc",
+ "once_cell",
+ "socket2",
+ "tracing",
+ "windows-sys 0.60.2",
+]
+
 [[package]]
 name = "quote"
 version = "1.0.45"
@@ -5993,6 +6087,8 @@ version = "0.8.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5ca0ecfa931c29007047d1bc58e623ab12e5590e8c7cc53200d5202b69266d8a"
 dependencies = [
+ "libc",
+ "rand_chacha 0.3.1",
  "rand_core 0.6.4",
  "serde",
 ]
@@ -6033,6 +6129,7 @@ version = "0.6.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ec0be4795e2f6a28069bec0b5ff3e2ac9bafc99e6a9a7dc3547996c5c816922c"
 dependencies = [
+ "getrandom 0.2.17",
  "serde",
 ]
 
@@ -6203,6 +6300,44 @@ version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "19b30a45b0cd0bcca8037f3d0dc3421eaf95327a17cad11964fb8179b4fc4832"
 
+[[package]]
+name = "reqwest"
+version = "0.12.28"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "eddd3ca559203180a307f12d114c268abf583f59b03cb906fd0b3ff8646c1147"
+dependencies = [
+ "base64 0.22.1",
+ "bytes",
+ "futures-core",
+ "http",
+ "http-body",
+ "http-body-util",
+ "hyper",
+ "hyper-rustls",
+ "hyper-util",
+ "js-sys",
+ "log",
+ "percent-encoding",
+ "pin-project-lite",
+ "quinn",
+ "rustls",
+ "rustls-pki-types",
+ "serde",
+ "serde_json",
+ "serde_urlencoded",
+ "sync_wrapper",
+ "tokio",
+ "tokio-rustls",
+ "tower",
+ "tower-http",
+ "tower-service",
+ "url",
+ "wasm-bindgen",
+ "wasm-bindgen-futures",
+ "web-sys",
+ "webpki-roots",
+]
+
 [[package]]
 name = "reqwest"
 version = "0.13.4"
@@ -6425,6 +6560,7 @@ version = "1.14.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "30a7197ae7eb376e574fe940d068c30fe0462554a3ddbe4eca7838e049c937a9"
 dependencies = [
+ "web-time",
  "zeroize",
 ]
 
@@ -6773,6 +6909,18 @@ dependencies = [
  "serde_core",
 ]
 
+[[package]]
+name = "serde_urlencoded"
+version = "0.7.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d3491c14715ca2294c4d6a88f15e84739788c1d030eed8c110436aafdaa2f3fd"
+dependencies = [
+ "form_urlencoded",
+ "itoa",
+ "ryu",
+ "serde",
+]
+
 [[package]]
 name = "serde_with"
 version = "3.21.0"
@@ -7421,7 +7569,7 @@ dependencies = [
  "percent-encoding",
  "plist",
  "raw-window-handle",
- "reqwest",
+ "reqwest 0.13.4",
  "serde",
  "serde_json",
  "serde_repr",
@@ -7610,7 +7758,7 @@ dependencies = [
  "minisign-verify",
  "osakit",
  "percent-encoding",
- "reqwest",
+ "reqwest 0.13.4",
  "rustls",
  "semver",
  "serde",
@@ -9149,6 +9297,15 @@ dependencies = [
  "rustls-pki-types",
 ]
 
+[[package]]
+name = "webpki-roots"
+version = "1.0.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bf85cb06032201fa7c6f829d7db5a7e5aa45bcc0655327713065f6f0576731bf"
+dependencies = [
+ "rustls-pki-types",
+]
+
 [[package]]
 name = "webview2-com"
 version = "0.38.2"

src-tauri/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "margin-app"
-version = "0.1.3"
+version = "0.1.15"
 description = "A Tauri App"
 authors = ["you"]
 edition = "2021"
@@ -27,14 +27,30 @@ serde = { version = "1", features = ["derive"] }
 serde_json = "1"
 base64 = "0.22"
 zip = "2"
+fontdb = "0.23"
 typst = "0.14.2"
 typst-pdf = "0.14.2"
 typst-as-lib = "0.15.5"
-spellbook = "0.4"
 # Pinned exactly: the [patch] stubs below are tied to this version's burn/cubecl graph. A minor
 # bump could silently invalidate the patch ("unused") and pull the broken CUDA subtree back in,
 # so bump deliberately and re-audit the stubs. (see [patch.crates-io])
 harper-core = { version = "=2.5.0", features = ["concurrent"] }
+reqwest = { version = "0.12", default-features = false, features = ["rustls-tls", "json"] }
+sha2 = "0.10"
+rand = "0.8"
+url = "2"
+
+# Spelling on macOS uses the system NSSpellChecker (same engine as TextEdit/Safari): far better
+# vocabulary than the bundled Hunspell dictionary and it skips URLs. These objc2 crates are already
+# in the graph via Tauri, so this adds nothing new to the build.
+[target.'cfg(target_os = "macos")'.dependencies]
+objc2 = "0.6"
+objc2-app-kit = { version = "0.3", features = ["NSSpellChecker"] }
+objc2-foundation = { version = "0.3", features = ["NSString", "NSArray", "NSRange", "NSTextCheckingResult"] }
+
+# Other platforms fall back to the bundled Hunspell dictionary via spellbook.
+[target.'cfg(not(target_os = "macos"))'.dependencies]
+spellbook = "0.4"
 
 # harper-core transitively declares an optional, disabled `burn-cuda` (CUDA backend).
 # Cargo still version-resolves that dead subtree, which currently fails (broken tracel-llvm

src-tauri/capabilities/default.json

@@ -6,9 +6,8 @@
   "permissions": [
     "core:default",
     "core:window:allow-destroy",
+    "core:window:allow-start-dragging",
     "opener:default",
-    "dialog:default",
-    "updater:default",
-    "process:allow-restart"
+    "dialog:default"
   ]
 }

src-tauri/capabilities/desktop.json

@@ -0,0 +1,8 @@
+{
+  "$schema": "../gen/schemas/desktop-schema.json",
+  "identifier": "desktop",
+  "description": "Desktop-only permissions (updater, process restart)",
+  "platforms": ["macOS", "windows", "linux"],
+  "windows": ["main"],
+  "permissions": ["updater:default", "process:allow-restart"]
+}

src-tauri/gen/apple/.gitignore

@@ -0,0 +1,3 @@
+xcuserdata/
+build/
+Externals/

src-tauri/gen/apple/Assets.xcassets/AppIcon.appiconset/Contents.json

@@ -0,0 +1,116 @@
+{
+  "images" : [
+    {
+      "size" : "20x20",
+      "idiom" : "iphone",
+      "filename" : "[email protected]",
+      "scale" : "2x"
+    },
+    {
+      "size" : "20x20",
+      "idiom" : "iphone",
+      "filename" : "[email protected]",
+      "scale" : "3x"
+    },
+    {
+      "size" : "29x29",
+      "idiom" : "iphone",
+      "filename" : "[email protected]",
+      "scale" : "2x"
+    },
+    {
+      "size" : "29x29",
+      "idiom" : "iphone",
+      "filename" : "[email protected]",
+      "scale" : "3x"
+    },
+    {
+      "size" : "40x40",
+      "idiom" : "iphone",
+      "filename" : "[email protected]",
+      "scale" : "2x"
+    },
+    {
+      "size" : "40x40",
+      "idiom" : "iphone",
+      "filename" : "[email protected]",
+      "scale" : "3x"
+    },
+    {
+      "size" : "60x60",
+      "idiom" : "iphone",
+      "filename" : "[email protected]",
+      "scale" : "2x"
+    },
+    {
+      "size" : "60x60",
+      "idiom" : "iphone",
+      "filename" : "[email protected]",
+      "scale" : "3x"
+    },
+    {
+      "size" : "20x20",
+      "idiom" : "ipad",
+      "filename" : "[email protected]",
+      "scale" : "1x"
+    },
+    {
+      "size" : "20x20",
+      "idiom" : "ipad",
+      "filename" : "[email protected]",
+      "scale" : "2x"
+    },
+    {
+      "size" : "29x29",
+      "idiom" : "ipad",
+      "filename" : "[email protected]",
+      "scale" : "1x"
+    },
+    {
+      "size" : "29x29",
+      "idiom" : "ipad",
+      "filename" : "[email protected]",
+      "scale" : "2x"
+    },
+    {
+      "size" : "40x40",
+      "idiom" : "ipad",
+      "filename" : "[email protected]",
+      "scale" : "1x"
+    },
+    {
+      "size" : "40x40",
+      "idiom" : "ipad",
+      "filename" : "[email protected]",
+      "scale" : "2x"
+    },
+    {
+      "size" : "76x76",
+      "idiom" : "ipad",
+      "filename" : "[email protected]",
+      "scale" : "1x"
+    },
+    {
+      "size" : "76x76",
+      "idiom" : "ipad",
+      "filename" : "[email protected]",
+      "scale" : "2x"
+    },
+    {
+      "size" : "83.5x83.5",
+      "idiom" : "ipad",
+      "filename" : "[email protected]",
+      "scale" : "2x"
+    },
+    {
+      "size" : "1024x1024",
+      "idiom" : "ios-marketing",
+      "filename" : "[email protected]",
+      "scale" : "1x"
+    }
+  ],
+  "info" : {
+    "version" : 1,
+    "author" : "xcode"
+  }
+}

src-tauri/gen/apple/Assets.xcassets/Contents.json

@@ -0,0 +1,6 @@
+{
+  "info" : {
+    "version" : 1,
+    "author" : "xcode"
+  }
+}

src-tauri/gen/apple/ExportOptions.plist

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+    <key>method</key>
+    <string>debugging</string>
+</dict>
+</plist>

src-tauri/gen/apple/LaunchScreen.storyboard

@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="17150" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" useSafeAreas="YES" colorMatched="YES" initialViewController="Y6W-OH-hqX">
+    <dependencies>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="17122"/>
+        <capability name="Safe area layout guides" minToolsVersion="9.0"/>
+        <capability name="System colors in document resources" minToolsVersion="11.0"/>
+        <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
+    </dependencies>
+    <scenes>
+        <!--View Controller-->
+        <scene sceneID="s0d-6b-0kx">
+            <objects>
+                <viewController id="Y6W-OH-hqX" sceneMemberID="viewController">
+                    <view key="view" contentMode="scaleToFill" id="5EZ-qb-Rvc">
+                        <rect key="frame" x="0.0" y="0.0" width="414" height="896"/>
+                        <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
+                        <viewLayoutGuide key="safeArea" id="vDu-zF-Fre"/>
+                        <color key="backgroundColor" systemColor="systemBackgroundColor"/>
+                    </view>
+                </viewController>
+                <placeholder placeholderIdentifier="IBFirstResponder" id="Ief-a0-LHa" userLabel="First Responder" customClass="UIResponder" sceneMemberID="firstResponder"/>
+            </objects>
+        </scene>
+    </scenes>
+    <resources>
+        <systemColor name="systemBackgroundColor">
+            <color white="1" alpha="1" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
+        </systemColor>
+    </resources>
+</document>

src-tauri/gen/apple/Podfile

@@ -0,0 +1,21 @@
+# Uncomment the next line to define a global platform for your project
+
+target 'margin-app_iOS' do
+platform :ios, '14.0'
+  # Pods for margin-app_iOS
+end
+
+target 'margin-app_macOS' do
+platform :osx, '11.0'
+  # Pods for margin-app_macOS
+end
+
+# Delete the deployment target for iOS and macOS, causing it to be inherited from the Podfile
+post_install do |installer|
+ installer.pods_project.targets.each do |target|
+  target.build_configurations.each do |config|
+   config.build_settings.delete 'IPHONEOS_DEPLOYMENT_TARGET'
+   config.build_settings.delete 'MACOSX_DEPLOYMENT_TARGET'
+  end
+ end
+end

src-tauri/gen/apple/Sources/margin-app/bindings/bindings.h

@@ -0,0 +1,8 @@
+#pragma once
+
+namespace ffi {
+    extern "C" {
+        void start_app();
+    }
+}
+

src-tauri/gen/apple/Sources/margin-app/main.mm

@@ -0,0 +1,6 @@
+#include "bindings/bindings.h"
+
+int main(int argc, char * argv[]) {
+	ffi::start_app();
+	return 0;
+}

src-tauri/gen/apple/assets/resources/dictionaries/en/SCOWL-license.txt

@@ -0,0 +1,347 @@
+en_US Hunspell Dictionary
+Version 2020.12.07
+Mon Dec 7 20:14:35 2020 -0500 [5ef55f9]
+http://wordlist.sourceforge.net
+
+README file for English Hunspell dictionaries derived from SCOWL.
+
+These dictionaries are created using the speller/make-hunspell-dict
+script in SCOWL.
+
+The following dictionaries are available:
+
+  en_US (American)
+  en_CA (Canadian)
+  en_GB-ise (British with "ise" spelling)
+  en_GB-ize (British with "ize" spelling)
+  en_AU (Australian)
+
+  en_US-large
+  en_CA-large
+  en_GB-large (with both "ise" and "ize" spelling)
+  en_AU-large
+
+The normal (non-large) dictionaries correspond to SCOWL size 60 and,
+to encourage consistent spelling, generally only include one spelling
+variant for a word.  The large dictionaries correspond to SCOWL size
+70 and may include multiple spelling for a word when both variants are
+considered almost equal.  The larger dictionaries however (1) have not
+been as carefully checked for errors as the normal dictionaries and
+thus may contain misspelled or invalid words; and (2) contain
+uncommon, yet valid, words that might cause problems as they are
+likely to be misspellings of more common words (for example, "ort" and
+"calender").
+
+To get an idea of the difference in size, here are 25 random words
+only found in the large dictionary for American English:
+
+  Bermejo Freyr's Guenevere Hatshepsut Nottinghamshire arrestment
+  crassitudes crural dogwatches errorless fetial flaxseeds godroon
+  incretion jalapeño's kelpie kishkes neuroglias pietisms pullulation
+  stemwinder stenoses syce thalassic zees
+
+The en_US, en_CA and en_AU are the official dictionaries for Hunspell.
+The en_GB and large dictionaries are made available on an experimental
+basis.  If you find them useful please send me a quick email at
+[email protected].
+
+If none of these dictionaries suite you (for example, maybe you want
+the normal dictionary that also includes common variants) additional
+dictionaries can be generated at http://app.aspell.net/create or by
+modifying speller/make-hunspell-dict in SCOWL.  Please do let me know
+if you end up publishing a customized dictionary.
+
+If a word is not found in the dictionary or a word is there you think
+shouldn't be, you can lookup the word up at http://app.aspell.net/lookup
+to help determine why that is.
+
+General comments on these list can be sent directly to me at
+[email protected] or to the wordlist-devel mailing lists
+(https://lists.sourceforge.net/lists/listinfo/wordlist-devel).  If you
+have specific issues with any of these dictionaries please file a bug
+report at https://github.com/kevina/wordlist/issues.
+
+IMPORTANT CHANGES INTRODUCED In 2016.11.20:
+
+New Australian dictionaries thanks to the work of Benjamin Titze
+([email protected]).
+
+IMPORTANT CHANGES INTRODUCED IN 2016.04.24:
+
+The dictionaries are now in UTF-8 format instead of ISO-8859-1.  This
+was required to handle smart quotes correctly.
+
+IMPORTANT CHANGES INTRODUCED IN 2016.01.19:
+
+"SET UTF8" was changes to "SET UTF-8" in the affix file as some
+versions of Hunspell do not recognize "UTF8".
+
+ADDITIONAL NOTES:
+
+The NOSUGGEST flag was added to certain taboo words.  While I made an
+honest attempt to flag the strongest taboo words with the NOSUGGEST
+flag, I MAKE NO GUARANTEE THAT I FLAGGED EVERY POSSIBLE TABOO WORD.
+The list was originally derived from Németh László, however I removed
+some words which, while being considered taboo by some dictionaries,
+are not really considered swear words in today's society.
+
+COPYRIGHT, SOURCES, and CREDITS:
+
+The English dictionaries come directly from SCOWL
+and is thus under the same copyright of SCOWL.  The affix file is
+a heavily modified version of the original english.aff file which was
+released as part of Geoff Kuenning's Ispell and as such is covered by
+his BSD license.  Part of SCOWL is also based on Ispell thus the
+Ispell copyright is included with the SCOWL copyright.
+
+The collective work is Copyright 2000-2018 by Kevin Atkinson as well
+as any of the copyrights mentioned below:
+
+  Copyright 2000-2018 by Kevin Atkinson
+
+  Permission to use, copy, modify, distribute and sell these word
+  lists, the associated scripts, the output created from the scripts,
+  and its documentation for any purpose is hereby granted without fee,
+  provided that the above copyright notice appears in all copies and
+  that both that copyright notice and this permission notice appear in
+  supporting documentation. Kevin Atkinson makes no representations
+  about the suitability of this array for any purpose. It is provided
+  "as is" without express or implied warranty.
+
+Alan Beale <[email protected]> also deserves special credit as he has,
+in addition to providing the 12Dicts package and being a major
+contributor to the ENABLE word list, given me an incredible amount of
+feedback and created a number of special lists (those found in the
+Supplement) in order to help improve the overall quality of SCOWL.
+
+The 10 level includes the 1000 most common English words (according to
+the Moby (TM) Words II [MWords] package), a subset of the 1000 most
+common words on the Internet (again, according to Moby Words II), and
+frequently class 16 from Brian Kelk's "UK English Wordlist
+with Frequency Classification".
+
+The MWords package was explicitly placed in the public domain:
+
+    The Moby lexicon project is complete and has
+    been place into the public domain. Use, sell,
+    rework, excerpt and use in any way on any platform.
+
+    Placing this material on internal or public servers is
+    also encouraged. The compiler is not aware of any
+    export restrictions so freely distribute world-wide.
+
+    You can verify the public domain status by contacting
+
+    Grady Ward
+    3449 Martha Ct.
+    Arcata, CA  95521-4884
+
+    [email protected]
+    [email protected]
+
+The "UK English Wordlist With Frequency Classification" is also in the
+Public Domain:
+
+  Date: Sat, 08 Jul 2000 20:27:21 +0100
+  From: Brian Kelk <[email protected]>
+
+  > I was wondering what the copyright status of your "UK English
+  > Wordlist With Frequency Classification" word list as it seems to
+  > be lacking any copyright notice.
+
+  There were many many sources in total, but any text marked
+  "copyright" was avoided. Locally-written documentation was one
+  source. An earlier version of the list resided in a filespace called
+  PUBLIC on the University mainframe, because it was considered public
+  domain.
+
+  Date: Tue, 11 Jul 2000 19:31:34 +0100
+
+  > So are you saying your word list is also in the public domain?
+
+  That is the intention.
+
+The 20 level includes frequency classes 7-15 from Brian's word list.
+
+The 35 level includes frequency classes 2-6 and words appearing in at
+least 11 of 12 dictionaries as indicated in the 12Dicts package.  All
+words from the 12Dicts package have had likely inflections added via
+my inflection database.
+
+The 12Dicts package and Supplement is in the Public Domain.
+
+The WordNet database, which was used in the creation of the
+Inflections database, is under the following copyright:
+
+  This software and database is being provided to you, the LICENSEE,
+  by Princeton University under the following license.  By obtaining,
+  using and/or copying this software and database, you agree that you
+  have read, understood, and will comply with these terms and
+  conditions.:
+
+  Permission to use, copy, modify and distribute this software and
+  database and its documentation for any purpose and without fee or
+  royalty is hereby granted, provided that you agree to comply with
+  the following copyright notice and statements, including the
+  disclaimer, and that the same appear on ALL copies of the software,
+  database and documentation, including modifications that you make
+  for internal use or for distribution.
+
+  WordNet 1.6 Copyright 1997 by Princeton University.  All rights
+  reserved.
+
+  THIS SOFTWARE AND DATABASE IS PROVIDED "AS IS" AND PRINCETON
+  UNIVERSITY MAKES NO REPRESENTATIONS OR WARRANTIES, EXPRESS OR
+  IMPLIED.  BY WAY OF EXAMPLE, BUT NOT LIMITATION, PRINCETON
+  UNIVERSITY MAKES NO REPRESENTATIONS OR WARRANTIES OF MERCHANT-
+  ABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE OR THAT THE USE OF THE
+  LICENSED SOFTWARE, DATABASE OR DOCUMENTATION WILL NOT INFRINGE ANY
+  THIRD PARTY PATENTS, COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS.
+
+  The name of Princeton University or Princeton may not be used in
+  advertising or publicity pertaining to distribution of the software
+  and/or database.  Title to copyright in this software, database and
+  any associated documentation shall at all times remain with
+  Princeton University and LICENSEE agrees to preserve same.
+
+The 40 level includes words from Alan's 3esl list found in version 4.0
+of his 12dicts package.  Like his other stuff the 3esl list is also in the
+public domain.
+
+The 50 level includes Brian's frequency class 1, words appearing
+in at least 5 of 12 of the dictionaries as indicated in the 12Dicts
+package, and uppercase words in at least 4 of the previous 12
+dictionaries.  A decent number of proper names is also included: The
+top 1000 male, female, and Last names from the 1990 Census report; a
+list of names sent to me by Alan Beale; and a few names that I added
+myself.  Finally a small list of abbreviations not commonly found in
+other word lists is included.
+
+The name files form the Census report is a government document which I
+don't think can be copyrighted.
+
+The file special-jargon.50 uses common.lst and word.lst from the
+"Unofficial Jargon File Word Lists" which is derived from "The Jargon
+File".  All of which is in the Public Domain.  This file also contain
+a few extra UNIX terms which are found in the file "unix-terms" in the
+special/ directory.
+
+The 55 level includes words from Alan's 2of4brif list found in version
+4.0 of his 12dicts package.  Like his other stuff the 2of4brif is also
+in the public domain.
+
+The 60 level includes all words appearing in at least 2 of the 12
+dictionaries as indicated by the 12Dicts package.
+
+The 70 level includes Brian's frequency class 0 and the 74,550 common
+dictionary words from the MWords package.  The common dictionary words,
+like those from the 12Dicts package, have had all likely inflections
+added.  The 70 level also included the 5desk list from version 4.0 of
+the 12Dics package which is in the public domain.
+
+The 80 level includes the ENABLE word list, all the lists in the
+ENABLE supplement package (except for ABLE), the "UK Advanced Cryptics
+Dictionary" (UKACD), the list of signature words from the YAWL package,
+and the 10,196 places list from the MWords package.
+
+The ENABLE package, mainted by M\Cooper <[email protected]>,
+is in the Public Domain:
+
+  The ENABLE master word list, WORD.LST, is herewith formally released
+  into the Public Domain. Anyone is free to use it or distribute it in
+  any manner they see fit. No fee or registration is required for its
+  use nor are "contributions" solicited (if you feel you absolutely
+  must contribute something for your own peace of mind, the authors of
+  the ENABLE list ask that you make a donation on their behalf to your
+  favorite charity). This word list is our gift to the Scrabble
+  community, as an alternate to "official" word lists. Game designers
+  may feel free to incorporate the WORD.LST into their games. Please
+  mention the source and credit us as originators of the list. Note
+  that if you, as a game designer, use the WORD.LST in your product,
+  you may still copyright and protect your product, but you may *not*
+  legally copyright or in any way restrict redistribution of the
+  WORD.LST portion of your product. This *may* under law restrict your
+  rights to restrict your users' rights, but that is only fair.
+
+UKACD, by J Ross Beresford <[email protected]>, is under the
+following copyright:
+
+  Copyright (c) J Ross Beresford 1993-1999. All Rights Reserved.
+
+  The following restriction is placed on the use of this publication:
+  if The UK Advanced Cryptics Dictionary is used in a software package
+  or redistributed in any form, the copyright notice must be
+  prominently displayed and the text of this document must be included
+  verbatim.
+
+  There are no other restrictions: I would like to see the list
+  distributed as widely as possible.
+
+The 95 level includes the 354,984 single words, 256,772 compound
+words, 4,946 female names and the 3,897 male names, and 21,986 names
+from the MWords package, ABLE.LST from the ENABLE Supplement, and some
+additional words found in my part-of-speech database that were not
+found anywhere else.
+
+Accent information was taken from UKACD.
+
+The VarCon package was used to create the American, British, Canadian,
+and Australian word list.  It is under the following copyright:
+
+  Copyright 2000-2016 by Kevin Atkinson
+
+  Permission to use, copy, modify, distribute and sell this array, the
+  associated software, and its documentation for any purpose is hereby
+  granted without fee, provided that the above copyright notice appears
+  in all copies and that both that copyright notice and this permission
+  notice appear in supporting documentation. Kevin Atkinson makes no
+  representations about the suitability of this array for any
+  purpose. It is provided "as is" without express or implied warranty.
+
+  Copyright 2016 by Benjamin Titze
+
+  Permission to use, copy, modify, distribute and sell this array, the
+  associated software, and its documentation for any purpose is hereby
+  granted without fee, provided that the above copyright notice appears
+  in all copies and that both that copyright notice and this permission
+  notice appear in supporting documentation. Benjamin Titze makes no
+  representations about the suitability of this array for any
+  purpose. It is provided "as is" without express or implied warranty.
+
+  Since the original words lists come from the Ispell distribution:
+
+  Copyright 1993, Geoff Kuenning, Granada Hills, CA
+  All rights reserved.
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions
+  are met:
+
+  1. Redistributions of source code must retain the above copyright
+     notice, this list of conditions and the following disclaimer.
+  2. Redistributions in binary form must reproduce the above copyright
+     notice, this list of conditions and the following disclaimer in the
+     documentation and/or other materials provided with the distribution.
+  3. All modifications to the source code must be clearly marked as
+     such.  Binary redistributions based on modified source code
+     must be clearly marked as modified versions in the documentation
+     and/or other materials provided with the distribution.
+  (clause 4 removed with permission from Geoff Kuenning)
+  5. The name of Geoff Kuenning may not be used to endorse or promote
+     products derived from this software without specific prior
+     written permission.
+
+  THIS SOFTWARE IS PROVIDED BY GEOFF KUENNING AND CONTRIBUTORS ``AS IS'' AND
+  ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+  ARE DISCLAIMED.  IN NO EVENT SHALL GEOFF KUENNING OR CONTRIBUTORS BE LIABLE
+  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+  DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+  OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+  LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+  OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+  SUCH DAMAGE.
+
+Build Date: Mon Dec  7 20:19:27 EST 2020
+Wordlist Command: mk-list --accents=strip en_US 60

src-tauri/gen/apple/assets/resources/dictionaries/en/index.aff

@@ -0,0 +1,205 @@
+SET UTF-8
+TRY esianrtolcdugmphbyfvkwzESIANRTOLCDUGMPHBYFVKWZ'
+ICONV 1
+ICONV ’ '
+NOSUGGEST !
+
+# ordinal numbers
+COMPOUNDMIN 1
+# only in compounds: 1th, 2th, 3th
+ONLYINCOMPOUND c
+# compound rules:
+# 1. [0-9]*1[0-9]th (10th, 11th, 12th, 56714th, etc.)
+# 2. [0-9]*[02-9](1st|2nd|3rd|[4-9]th) (21st, 22nd, 123rd, 1234th, etc.)
+COMPOUNDRULE 2
+COMPOUNDRULE n*1t
+COMPOUNDRULE n*mp
+WORDCHARS 0123456789
+
+PFX A Y 1
+PFX A   0     re         .
+
+PFX I Y 1
+PFX I   0     in         .
+
+PFX U Y 1
+PFX U   0     un         .
+
+PFX C Y 1
+PFX C   0     de          .
+
+PFX E Y 1
+PFX E   0     dis         .
+
+PFX F Y 1
+PFX F   0     con         .
+
+PFX K Y 1
+PFX K   0     pro         .
+
+SFX V N 2
+SFX V   e     ive        e
+SFX V   0     ive        [^e]
+
+SFX N Y 3
+SFX N   e     ion        e
+SFX N   y     ication    y
+SFX N   0     en         [^ey]
+
+SFX X Y 3
+SFX X   e     ions       e
+SFX X   y     ications   y
+SFX X   0     ens        [^ey]
+
+SFX H N 2
+SFX H   y     ieth       y
+SFX H   0     th         [^y]
+
+SFX Y Y 1
+SFX Y   0     ly         .
+
+SFX G Y 2
+SFX G   e     ing        e
+SFX G   0     ing        [^e]
+
+SFX J Y 2
+SFX J   e     ings       e
+SFX J   0     ings       [^e]
+
+SFX D Y 4
+SFX D   0     d          e
+SFX D   y     ied        [^aeiou]y
+SFX D   0     ed         [^ey]
+SFX D   0     ed         [aeiou]y
+
+SFX T N 4
+SFX T   0     st         e
+SFX T   y     iest       [^aeiou]y
+SFX T   0     est        [aeiou]y
+SFX T   0     est        [^ey]
+
+SFX R Y 4
+SFX R   0     r          e
+SFX R   y     ier        [^aeiou]y
+SFX R   0     er         [aeiou]y
+SFX R   0     er         [^ey]
+
+SFX Z Y 4
+SFX Z   0     rs         e
+SFX Z   y     iers       [^aeiou]y
+SFX Z   0     ers        [aeiou]y
+SFX Z   0     ers        [^ey]
+
+SFX S Y 4
+SFX S   y     ies        [^aeiou]y
+SFX S   0     s          [aeiou]y
+SFX S   0     es         [sxzh]
+SFX S   0     s          [^sxzhy]
+
+SFX P Y 3
+SFX P   y     iness      [^aeiou]y
+SFX P   0     ness       [aeiou]y
+SFX P   0     ness       [^y]
+
+SFX M Y 1
+SFX M   0     's         .
+
+SFX B Y 3
+SFX B   0     able       [^aeiou]
+SFX B   0     able       ee
+SFX B   e     able       [^aeiou]e
+
+SFX L Y 1
+SFX L   0     ment       .
+
+REP 90
+REP a ei
+REP ei a
+REP a ey
+REP ey a
+REP ai ie
+REP ie ai
+REP alot a_lot
+REP are air
+REP are ear
+REP are eir
+REP air are
+REP air ere
+REP ere air
+REP ere ear
+REP ere eir
+REP ear are
+REP ear air
+REP ear ere
+REP eir are
+REP eir ere
+REP ch te
+REP te ch
+REP ch ti
+REP ti ch
+REP ch tu
+REP tu ch
+REP ch s
+REP s ch
+REP ch k
+REP k ch
+REP f ph
+REP ph f
+REP gh f
+REP f gh
+REP i igh
+REP igh i
+REP i uy
+REP uy i
+REP i ee
+REP ee i
+REP j di
+REP di j
+REP j gg
+REP gg j
+REP j ge
+REP ge j
+REP s ti
+REP ti s
+REP s ci
+REP ci s
+REP k cc
+REP cc k
+REP k qu
+REP qu k
+REP kw qu
+REP o eau
+REP eau o
+REP o ew
+REP ew o
+REP oo ew
+REP ew oo
+REP ew ui
+REP ui ew
+REP oo ui
+REP ui oo
+REP ew u
+REP u ew
+REP oo u
+REP u oo
+REP u oe
+REP oe u
+REP u ieu
+REP ieu u
+REP ue ew
+REP ew ue
+REP uff ough
+REP oo ieu
+REP ieu oo
+REP ier ear
+REP ear ier
+REP ear air
+REP air ear
+REP w qu
+REP qu w
+REP z ss
+REP ss z
+REP shun tion
+REP shun sion
+REP shun cion
+REP size cise

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+			packageProductDependencies = (
+			);
+			productName = "margin-app_iOS";
+			productReference = B94688F7EA7A2C4A8C0DFD01 /* margin-app_iOS.app */;
+			productType = "com.apple.product-type.application";
+		};
+/* End PBXNativeTarget section */
+
+/* Begin PBXProject section */
+		5FC750CFBA18ED6763EEF3A3 /* Project object */ = {
+			isa = PBXProject;
+			attributes = {
+				BuildIndependentTargetsInParallel = YES;
+				LastUpgradeCheck = 1430;
+				TargetAttributes = {
+				};
+			};
+			buildConfigurationList = C4AD3401C458C5C48B1EF849 /* Build configuration list for PBXProject "margin-app" */;
+			developmentRegion = en;
+			hasScannedForEncodings = 0;
+			knownRegions = (
+				Base,
+				en,
+			);
+			mainGroup = D99826F6BEBF021E86B50785;
+			minimizedProjectReferenceProxies = 1;
+			preferredProjectObjectVersion = 77;
+			productRefGroup = AF74A9A4E2E249230D0E350E /* Products */;
+			projectDirPath = "";
+			projectRoot = "";
+			targets = (
+				D914A04EE7625E0BFF302CBB /* margin-app_iOS */,
+			);
+		};
+/* End PBXProject section */
+
+/* Begin PBXResourcesBuildPhase section */
+		303B1D89A72F4ED6D2E12CFD /* Resources */ = {
+			isa = PBXResourcesBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+				911563A32C960AC8241ED351 /* Assets.xcassets in Resources */,
+				EA15997B9A4564CD88AAF265 /* LaunchScreen.storyboard in Resources */,
+				F6530048C395DF030B4AB269 /* assets in Resources */,
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
+/* End PBXResourcesBuildPhase section */
+
+/* Begin PBXShellScriptBuildPhase section */
+		AB760B90696AB2964C7D49A9 /* Build Rust Code */ = {
+			isa = PBXShellScriptBuildPhase;
+			alwaysOutOfDate = 1;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			inputFileListPaths = (
+			);
+			inputPaths = (
+			);
+			name = "Build Rust Code";
+			outputFileListPaths = (
+			);
+			outputPaths = (
+				"$(SRCROOT)/Externals/x86_64/${CONFIGURATION}/libapp.a",
+				"$(SRCROOT)/Externals/arm64/${CONFIGURATION}/libapp.a",
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+			shellPath = /bin/sh;
+			shellScript = "npm run -- tauri ios xcode-script -v --platform ${PLATFORM_DISPLAY_NAME:?} --sdk-root ${SDKROOT:?} --framework-search-paths \"${FRAMEWORK_SEARCH_PATHS:?}\" --header-search-paths \"${HEADER_SEARCH_PATHS:?}\" --gcc-preprocessor-definitions \"${GCC_PREPROCESSOR_DEFINITIONS:-}\" --configuration ${CONFIGURATION:?} ${FORCE_COLOR} ${ARCHS:?}";
+		};
+/* End PBXShellScriptBuildPhase section */
+
+/* Begin PBXSourcesBuildPhase section */
+		DE9CC46A3C745D3EE2659FC1 /* Sources */ = {
+			isa = PBXSourcesBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+				D6FCF60E9A225E886B4201B4 /* main.mm in Sources */,
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
+/* End PBXSourcesBuildPhase section */
+
+/* Begin XCBuildConfiguration section */
+		2115AE8BB6330806DC18A6DE /* release */ = {
+			isa = XCBuildConfiguration;
+			buildSettings = {
+				ALWAYS_EMBED_SWIFT_STANDARD_LIBRARIES = YES;
+				ARCHS = (
+					arm64,
+				);
+				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
+				CODE_SIGN_ENTITLEMENTS = "margin-app_iOS/margin-app_iOS.entitlements";
+				CODE_SIGN_IDENTITY = "iPhone Developer";
+				ENABLE_BITCODE = NO;
+				"EXCLUDED_ARCHS[sdk=iphoneos*]" = x86_64;
+				FRAMEWORK_SEARCH_PATHS = (
+					"$(inherited)",
+					"\".\"",
+				);
+				INFOPLIST_FILE = "margin-app_iOS/Info.plist";
+				LD_RUNPATH_SEARCH_PATHS = (
+					"$(inherited)",
+					"@executable_path/Frameworks",
+				);
+				"LIBRARY_SEARCH_PATHS[arch=arm64]" = "$(inherited) $(PROJECT_DIR)/Externals/arm64/$(CONFIGURATION) $(SDKROOT)/usr/lib/swift $(DEVELOPER_DIR)/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/$(PLATFORM_NAME) $(DEVELOPER_DIR)/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift-5.0/$(PLATFORM_NAME)";
+				"LIBRARY_SEARCH_PATHS[arch=x86_64]" = "$(inherited) $(PROJECT_DIR)/Externals/x86_64/$(CONFIGURATION) $(SDKROOT)/usr/lib/swift $(DEVELOPER_DIR)/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/$(PLATFORM_NAME) $(DEVELOPER_DIR)/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift-5.0/$(PLATFORM_NAME)";
+				PRODUCT_BUNDLE_IDENTIFIER = studio.margin.app;
+				PRODUCT_NAME = "Margin";
+				SDKROOT = iphoneos;
+				TARGETED_DEVICE_FAMILY = "1,2";
+				VALID_ARCHS = arm64;
+			};
+			name = release;
+		};
+		44B57C3232BEF013CE90639D /* debug */ = {
+			isa = XCBuildConfiguration;
+			buildSettings = {
+				ALWAYS_SEARCH_USER_PATHS = NO;
+				CLANG_ANALYZER_NONNULL = YES;
+				CLANG_ANALYZER_NUMBER_OBJECT_CONVERSION = YES_AGGRESSIVE;
+				CLANG_CXX_LANGUAGE_STANDARD = "gnu++14";
+				CLANG_CXX_LIBRARY = "libc++";
+				CLANG_ENABLE_MODULES = YES;
+				CLANG_ENABLE_OBJC_ARC = YES;
+				CLANG_ENABLE_OBJC_WEAK = YES;
+				CLANG_WARN_BLOCK_CAPTURE_AUTORELEASING = YES;
+				CLANG_WARN_BOOL_CONVERSION = YES;
+				CLANG_WARN_COMMA = YES;
+				CLANG_WARN_CONSTANT_CONVERSION = YES;
+				CLANG_WARN_DEPRECATED_OBJC_IMPLEMENTATIONS = YES;
+				CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
+				CLANG_WARN_DOCUMENTATION_COMMENTS = YES;
+				CLANG_WARN_EMPTY_BODY = YES;
+				CLANG_WARN_ENUM_CONVERSION = YES;
+				CLANG_WARN_INFINITE_RECURSION = YES;
+				CLANG_WARN_INT_CONVERSION = YES;
+				CLANG_WARN_NON_LITERAL_NULL_CONVERSION = YES;
+				CLANG_WARN_OBJC_IMPLICIT_RETAIN_SELF = YES;
+				CLANG_WARN_OBJC_LITERAL_CONVERSION = YES;
+				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
+				CLANG_WARN_QUOTED_INCLUDE_IN_FRAMEWORK_HEADER = YES;
+				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
+				CLANG_WARN_STRICT_PROTOTYPES = YES;
+				CLANG_WARN_SUSPICIOUS_MOVE = YES;
+				CLANG_WARN_UNGUARDED_AVAILABILITY = YES_AGGRESSIVE;
+				CLANG_WARN_UNREACHABLE_CODE = YES;
+				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
+				COPY_PHASE_STRIP = NO;
+				DEBUG_INFORMATION_FORMAT = dwarf;
+				ENABLE_STRICT_OBJC_MSGSEND = YES;
+				ENABLE_TESTABILITY = YES;
+				GCC_C_LANGUAGE_STANDARD = gnu11;
+				GCC_DYNAMIC_NO_PIC = NO;
+				GCC_NO_COMMON_BLOCKS = YES;
+				GCC_OPTIMIZATION_LEVEL = 0;
+				GCC_PREPROCESSOR_DEFINITIONS = (
+					"$(inherited)",
+					"DEBUG=1",
+				);
+				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
+				GCC_WARN_ABOUT_RETURN_TYPE = YES_ERROR;
+				GCC_WARN_UNDECLARED_SELECTOR = YES;
+				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
+				GCC_WARN_UNUSED_FUNCTION = YES;
+				GCC_WARN_UNUSED_VARIABLE = YES;
+				IPHONEOS_DEPLOYMENT_TARGET = 14.0;
+				MTL_ENABLE_DEBUG_INFO = INCLUDE_SOURCE;
+				MTL_FAST_MATH = YES;
+				ONLY_ACTIVE_ARCH = YES;
+				PRODUCT_NAME = "$(TARGET_NAME)";
+				SDKROOT = iphoneos;
+				SWIFT_ACTIVE_COMPILATION_CONDITIONS = DEBUG;
+				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
+				SWIFT_VERSION = 5.0;
+			};
+			name = debug;
+		};
+		845C6F72D84890D3B5F7D222 /* release */ = {
+			isa = XCBuildConfiguration;
+			buildSettings = {
+				ALWAYS_SEARCH_USER_PATHS = NO;
+				CLANG_ANALYZER_NONNULL = YES;
+				CLANG_ANALYZER_NUMBER_OBJECT_CONVERSION = YES_AGGRESSIVE;
+				CLANG_CXX_LANGUAGE_STANDARD = "gnu++14";
+				CLANG_CXX_LIBRARY = "libc++";
+				CLANG_ENABLE_MODULES = YES;
+				CLANG_ENABLE_OBJC_ARC = YES;
+				CLANG_ENABLE_OBJC_WEAK = YES;
+				CLANG_WARN_BLOCK_CAPTURE_AUTORELEASING = YES;
+				CLANG_WARN_BOOL_CONVERSION = YES;
+				CLANG_WARN_COMMA = YES;
+				CLANG_WARN_CONSTANT_CONVERSION = YES;
+				CLANG_WARN_DEPRECATED_OBJC_IMPLEMENTATIONS = YES;
+				CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
+				CLANG_WARN_DOCUMENTATION_COMMENTS = YES;
+				CLANG_WARN_EMPTY_BODY = YES;
+				CLANG_WARN_ENUM_CONVERSION = YES;
+				CLANG_WARN_INFINITE_RECURSION = YES;
+				CLANG_WARN_INT_CONVERSION = YES;
+				CLANG_WARN_NON_LITERAL_NULL_CONVERSION = YES;
+				CLANG_WARN_OBJC_IMPLICIT_RETAIN_SELF = YES;
+				CLANG_WARN_OBJC_LITERAL_CONVERSION = YES;
+				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
+				CLANG_WARN_QUOTED_INCLUDE_IN_FRAMEWORK_HEADER = YES;
+				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
+				CLANG_WARN_STRICT_PROTOTYPES = YES;
+				CLANG_WARN_SUSPICIOUS_MOVE = YES;
+				CLANG_WARN_UNGUARDED_AVAILABILITY = YES_AGGRESSIVE;
+				CLANG_WARN_UNREACHABLE_CODE = YES;
+				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
+				COPY_PHASE_STRIP = NO;
+				DEBUG_INFORMATION_FORMAT = "dwarf-with-dsym";
+				ENABLE_NS_ASSERTIONS = NO;
+				ENABLE_STRICT_OBJC_MSGSEND = YES;
+				GCC_C_LANGUAGE_STANDARD = gnu11;
+				GCC_NO_COMMON_BLOCKS = YES;
+				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
+				GCC_WARN_ABOUT_RETURN_TYPE = YES_ERROR;
+				GCC_WARN_UNDECLARED_SELECTOR = YES;
+				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
+				GCC_WARN_UNUSED_FUNCTION = YES;
+				GCC_WARN_UNUSED_VARIABLE = YES;
+				IPHONEOS_DEPLOYMENT_TARGET = 14.0;
+				MTL_ENABLE_DEBUG_INFO = NO;
+				MTL_FAST_MATH = YES;
+				PRODUCT_NAME = "$(TARGET_NAME)";
+				SDKROOT = iphoneos;
+				SWIFT_COMPILATION_MODE = wholemodule;
+				SWIFT_OPTIMIZATION_LEVEL = "-O";
+				SWIFT_VERSION = 5.0;
+			};
+			name = release;
+		};
+		E3805913695CB6F5D2BE9BCB /* debug */ = {
+			isa = XCBuildConfiguration;
+			buildSettings = {
+				ALWAYS_EMBED_SWIFT_STANDARD_LIBRARIES = YES;
+				ARCHS = (
+					arm64,
+				);
+				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
+				CODE_SIGN_ENTITLEMENTS = "margin-app_iOS/margin-app_iOS.entitlements";
+				CODE_SIGN_IDENTITY = "iPhone Developer";
+				ENABLE_BITCODE = NO;
+				"EXCLUDED_ARCHS[sdk=iphoneos*]" = x86_64;
+				FRAMEWORK_SEARCH_PATHS = (
+					"$(inherited)",
+					"\".\"",
+				);
+				INFOPLIST_FILE = "margin-app_iOS/Info.plist";
+				LD_RUNPATH_SEARCH_PATHS = (
+					"$(inherited)",
+					"@executable_path/Frameworks",
+				);
+				"LIBRARY_SEARCH_PATHS[arch=arm64]" = "$(inherited) $(PROJECT_DIR)/Externals/arm64/$(CONFIGURATION) $(SDKROOT)/usr/lib/swift $(DEVELOPER_DIR)/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/$(PLATFORM_NAME) $(DEVELOPER_DIR)/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift-5.0/$(PLATFORM_NAME)";
+				"LIBRARY_SEARCH_PATHS[arch=x86_64]" = "$(inherited) $(PROJECT_DIR)/Externals/x86_64/$(CONFIGURATION) $(SDKROOT)/usr/lib/swift $(DEVELOPER_DIR)/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/$(PLATFORM_NAME) $(DEVELOPER_DIR)/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift-5.0/$(PLATFORM_NAME)";
+				PRODUCT_BUNDLE_IDENTIFIER = studio.margin.app;
+				PRODUCT_NAME = "Margin";
+				SDKROOT = iphoneos;
+				TARGETED_DEVICE_FAMILY = "1,2";
+				VALID_ARCHS = arm64;
+			};
+			name = debug;
+		};
+/* End XCBuildConfiguration section */
+
+/* Begin XCConfigurationList section */
+		2AFB5AED9BBDA36D01ECA7AE /* Build configuration list for PBXNativeTarget "margin-app_iOS" */ = {
+			isa = XCConfigurationList;
+			buildConfigurations = (
+				E3805913695CB6F5D2BE9BCB /* debug */,
+				2115AE8BB6330806DC18A6DE /* release */,
+			);
+			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = debug;
+		};
+		C4AD3401C458C5C48B1EF849 /* Build configuration list for PBXProject "margin-app" */ = {
+			isa = XCConfigurationList;
+			buildConfigurations = (
+				44B57C3232BEF013CE90639D /* debug */,
+				845C6F72D84890D3B5F7D222 /* release */,
+			);
+			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = debug;
+		};
+/* End XCConfigurationList section */
+	};
+	rootObject = 5FC750CFBA18ED6763EEF3A3 /* Project object */;
+}

src-tauri/gen/apple/margin-app.xcodeproj/project.xcworkspace/contents.xcworkspacedata

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Workspace
+   version = "1.0">
+   <FileRef
+      location = "self:">
+   </FileRef>
+</Workspace>

src-tauri/gen/apple/margin-app.xcodeproj/project.xcworkspace/xcshareddata/WorkspaceSettings.xcsettings

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>BuildSystemType</key>
+	<string>Original</string>
+	<key>DisableBuildSystemDeprecationDiagnostic</key>
+	<true/>
+</dict>
+</plist>

src-tauri/gen/apple/margin-app.xcodeproj/xcshareddata/xcschemes/margin-app_iOS.xcscheme

@@ -0,0 +1,131 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Scheme
+   LastUpgradeVersion = "1430"
+   version = "1.7">
+   <BuildAction
+      parallelizeBuildables = "YES"
+      buildImplicitDependencies = "YES"
+      runPostActionsOnFailure = "NO">
+      <BuildActionEntries>
+         <BuildActionEntry
+            buildForTesting = "YES"
+            buildForRunning = "YES"
+            buildForProfiling = "YES"
+            buildForArchiving = "YES"
+            buildForAnalyzing = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "D914A04EE7625E0BFF302CBB"
+               BuildableName = "margin-app_iOS.app"
+               BlueprintName = "margin-app_iOS"
+               ReferencedContainer = "container:margin-app.xcodeproj">
+            </BuildableReference>
+         </BuildActionEntry>
+      </BuildActionEntries>
+   </BuildAction>
+   <TestAction
+      buildConfiguration = "debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      shouldUseLaunchSchemeArgsEnv = "NO"
+      onlyGenerateCoverageForSpecifiedTargets = "NO">
+      <MacroExpansion>
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "D914A04EE7625E0BFF302CBB"
+            BuildableName = "margin-app_iOS.app"
+            BlueprintName = "margin-app_iOS"
+            ReferencedContainer = "container:margin-app.xcodeproj">
+         </BuildableReference>
+      </MacroExpansion>
+      <Testables>
+      </Testables>
+      <CommandLineArguments>
+      </CommandLineArguments>
+      <EnvironmentVariables>
+         <EnvironmentVariable
+            key = "RUST_BACKTRACE"
+            value = "full"
+            isEnabled = "YES">
+         </EnvironmentVariable>
+         <EnvironmentVariable
+            key = "RUST_LOG"
+            value = "info"
+            isEnabled = "YES">
+         </EnvironmentVariable>
+      </EnvironmentVariables>
+   </TestAction>
+   <LaunchAction
+      buildConfiguration = "debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      launchStyle = "0"
+      useCustomWorkingDirectory = "NO"
+      ignoresPersistentStateOnLaunch = "NO"
+      debugDocumentVersioning = "YES"
+      debugServiceExtension = "internal"
+      allowLocationSimulation = "YES">
+      <BuildableProductRunnable
+         runnableDebuggingMode = "0">
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "D914A04EE7625E0BFF302CBB"
+            BuildableName = "margin-app_iOS.app"
+            BlueprintName = "margin-app_iOS"
+            ReferencedContainer = "container:margin-app.xcodeproj">
+         </BuildableReference>
+      </BuildableProductRunnable>
+      <CommandLineArguments>
+      </CommandLineArguments>
+      <EnvironmentVariables>
+         <EnvironmentVariable
+            key = "RUST_BACKTRACE"
+            value = "full"
+            isEnabled = "YES">
+         </EnvironmentVariable>
+         <EnvironmentVariable
+            key = "RUST_LOG"
+            value = "info"
+            isEnabled = "YES">
+         </EnvironmentVariable>
+      </EnvironmentVariables>
+   </LaunchAction>
+   <ProfileAction
+      buildConfiguration = "release"
+      shouldUseLaunchSchemeArgsEnv = "NO"
+      savedToolIdentifier = ""
+      useCustomWorkingDirectory = "NO"
+      debugDocumentVersioning = "YES">
+      <BuildableProductRunnable
+         runnableDebuggingMode = "0">
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "D914A04EE7625E0BFF302CBB"
+            BuildableName = "margin-app_iOS.app"
+            BlueprintName = "margin-app_iOS"
+            ReferencedContainer = "container:margin-app.xcodeproj">
+         </BuildableReference>
+      </BuildableProductRunnable>
+      <CommandLineArguments>
+      </CommandLineArguments>
+      <EnvironmentVariables>
+         <EnvironmentVariable
+            key = "RUST_BACKTRACE"
+            value = "full"
+            isEnabled = "YES">
+         </EnvironmentVariable>
+         <EnvironmentVariable
+            key = "RUST_LOG"
+            value = "info"
+            isEnabled = "YES">
+         </EnvironmentVariable>
+      </EnvironmentVariables>
+   </ProfileAction>
+   <AnalyzeAction
+      buildConfiguration = "debug">
+   </AnalyzeAction>
+   <ArchiveAction
+      buildConfiguration = "release"
+      revealArchiveInOrganizer = "YES">
+   </ArchiveAction>
+</Scheme>

src-tauri/gen/apple/margin-app_iOS/Info.plist

@@ -0,0 +1,44 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>CFBundleDevelopmentRegion</key>
+	<string>$(DEVELOPMENT_LANGUAGE)</string>
+	<key>CFBundleExecutable</key>
+	<string>$(EXECUTABLE_NAME)</string>
+	<key>CFBundleIdentifier</key>
+	<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
+	<key>CFBundleInfoDictionaryVersion</key>
+	<string>6.0</string>
+	<key>CFBundleName</key>
+	<string>$(PRODUCT_NAME)</string>
+	<key>CFBundlePackageType</key>
+	<string>APPL</string>
+	<key>CFBundleShortVersionString</key>
+	<string>0.1.7</string>
+	<key>CFBundleVersion</key>
+	<string>0.1.7</string>
+	<key>LSRequiresIPhoneOS</key>
+	<true/>
+	<key>UILaunchStoryboardName</key>
+	<string>LaunchScreen</string>
+	<key>UIRequiredDeviceCapabilities</key>
+	<array>
+		<string>arm64</string>
+		<string>metal</string>
+	</array>
+	<key>UISupportedInterfaceOrientations</key>
+	<array>
+		<string>UIInterfaceOrientationPortrait</string>
+		<string>UIInterfaceOrientationLandscapeLeft</string>
+		<string>UIInterfaceOrientationLandscapeRight</string>
+	</array>
+	<key>UISupportedInterfaceOrientations~ipad</key>
+	<array>
+		<string>UIInterfaceOrientationPortrait</string>
+		<string>UIInterfaceOrientationPortraitUpsideDown</string>
+		<string>UIInterfaceOrientationLandscapeLeft</string>
+		<string>UIInterfaceOrientationLandscapeRight</string>
+	</array>
+</dict>
+</plist>

src-tauri/gen/apple/margin-app_iOS/margin-app_iOS.entitlements

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict/>
+</plist>

src-tauri/gen/apple/project.yml

@@ -0,0 +1,88 @@
+name: margin-app
+options:
+  bundleIdPrefix: studio.margin.app
+  deploymentTarget:
+    iOS: 14.0
+fileGroups: [../../src]
+configs:
+  debug: debug
+  release: release
+settingGroups:
+  app:
+    base:
+      PRODUCT_NAME: Margin
+      PRODUCT_BUNDLE_IDENTIFIER: studio.margin.app
+targetTemplates:
+  app:
+    type: application
+    sources:
+      - path: Sources
+    scheme:
+      environmentVariables:
+        RUST_BACKTRACE: full
+        RUST_LOG: info
+    settings:
+      groups: [app]
+targets:
+  margin-app_iOS:
+    type: application
+    platform: iOS
+    sources:
+      - path: Sources
+      - path: Assets.xcassets
+      - path: Externals
+      - path: margin-app_iOS
+      - path: assets
+        buildPhase: resources
+        type: folder
+      - path: LaunchScreen.storyboard
+    info:
+      path: margin-app_iOS/Info.plist
+      properties:
+        LSRequiresIPhoneOS: true
+        UILaunchStoryboardName: LaunchScreen
+        UIRequiredDeviceCapabilities: [arm64, metal]
+        UISupportedInterfaceOrientations:
+          - UIInterfaceOrientationPortrait
+          - UIInterfaceOrientationLandscapeLeft
+          - UIInterfaceOrientationLandscapeRight
+        UISupportedInterfaceOrientations~ipad:
+          - UIInterfaceOrientationPortrait
+          - UIInterfaceOrientationPortraitUpsideDown
+          - UIInterfaceOrientationLandscapeLeft
+          - UIInterfaceOrientationLandscapeRight
+        CFBundleShortVersionString: 0.1.7
+        CFBundleVersion: "0.1.7"
+    entitlements:
+      path: margin-app_iOS/margin-app_iOS.entitlements
+    scheme:
+      environmentVariables:
+        RUST_BACKTRACE: full
+        RUST_LOG: info
+    settings:
+      base:
+        ENABLE_BITCODE: false
+        ARCHS: [arm64]
+        VALID_ARCHS: arm64 
+        LIBRARY_SEARCH_PATHS[arch=x86_64]: $(inherited) $(PROJECT_DIR)/Externals/x86_64/$(CONFIGURATION) $(SDKROOT)/usr/lib/swift $(DEVELOPER_DIR)/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/$(PLATFORM_NAME) $(DEVELOPER_DIR)/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift-5.0/$(PLATFORM_NAME)
+        LIBRARY_SEARCH_PATHS[arch=arm64]: $(inherited) $(PROJECT_DIR)/Externals/arm64/$(CONFIGURATION) $(SDKROOT)/usr/lib/swift $(DEVELOPER_DIR)/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/$(PLATFORM_NAME) $(DEVELOPER_DIR)/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift-5.0/$(PLATFORM_NAME)
+        ALWAYS_EMBED_SWIFT_STANDARD_LIBRARIES: true
+        EXCLUDED_ARCHS[sdk=iphoneos*]: x86_64
+      groups: [app]
+    dependencies:
+      - framework: libapp.a
+        embed: false
+      - sdk: CoreGraphics.framework
+      - sdk: Metal.framework
+      - sdk: MetalKit.framework
+      - sdk: QuartzCore.framework
+      - sdk: Security.framework
+      - sdk: UIKit.framework
+      - sdk: WebKit.framework
+    preBuildScripts:
+      - script: npm run -- tauri ios xcode-script -v --platform ${PLATFORM_DISPLAY_NAME:?} --sdk-root ${SDKROOT:?} --framework-search-paths "${FRAMEWORK_SEARCH_PATHS:?}" --header-search-paths "${HEADER_SEARCH_PATHS:?}" --gcc-preprocessor-definitions "${GCC_PREPROCESSOR_DEFINITIONS:-}" --configuration ${CONFIGURATION:?} ${FORCE_COLOR} ${ARCHS:?}
+        name: Build Rust Code
+        basedOnDependencyAnalysis: false
+        outputFiles:
+          - $(SRCROOT)/Externals/x86_64/${CONFIGURATION}/libapp.a
+          - $(SRCROOT)/Externals/arm64/${CONFIGURATION}/libapp.a

src-tauri/resources/dictionaries/en/tech.txt

@@ -0,0 +1,304 @@
+# Bundled technical and product terms accepted by the spell checker.
+# Matched case-insensitively. Words with internal capitals (macOS, iOS,
+# iPhone, GitHub) are already accepted by a heuristic and need not be listed.
+
+# Platforms and operating systems
+ios
+ipados
+macos
+watchos
+tvos
+android
+linux
+unix
+ubuntu
+debian
+fedora
+centos
+distro
+kernel
+chromeos
+
+# Apple ecosystem
+iphone
+ipad
+ipod
+imac
+macbook
+airpods
+airpod
+airtag
+homepod
+icloud
+airdrop
+facetime
+imessage
+siri
+retina
+
+# Devices and hardware
+smartphone
+smartphones
+smartwatch
+touchscreen
+webcam
+microcontroller
+cpu
+gpu
+ssd
+hdd
+ram
+usb
+hdmi
+ethernet
+bluetooth
+wifi
+nfc
+
+# Languages and runtimes
+javascript
+typescript
+nodejs
+node
+deno
+bun
+golang
+kotlin
+swift
+rust
+ruby
+python
+php
+perl
+scala
+clojure
+elixir
+haskell
+dart
+lua
+
+# Tooling and package managers
+npm
+npx
+nvm
+yarn
+pnpm
+webpack
+vite
+rollup
+esbuild
+babel
+eslint
+prettier
+tsconfig
+linter
+linters
+transpiler
+bundler
+runtime
+runtimes
+toolchain
+boilerplate
+
+# Web and frontend
+frontend
+backend
+fullstack
+middleware
+serverless
+api
+apis
+endpoint
+endpoints
+url
+urls
+uri
+uris
+cors
+oauth
+jwt
+csrf
+xss
+favicon
+viewport
+responsive
+dropdown
+checkbox
+tooltip
+modal
+navbar
+sidebar
+toolbar
+wireframe
+mockup
+placeholder
+
+# Data formats and protocols
+json
+yaml
+toml
+xml
+svg
+csv
+markdown
+http
+https
+ssh
+ftp
+sftp
+tcp
+udp
+dns
+vpn
+ssl
+tls
+localhost
+hostname
+subdomain
+namespace
+
+# Databases
+sql
+nosql
+postgres
+postgresql
+mysql
+mariadb
+sqlite
+mongodb
+redis
+elasticsearch
+schema
+schemas
+schemaless
+indexing
+
+# DevOps and cloud
+docker
+dockerfile
+kubernetes
+nginx
+serverless
+devops
+ci
+cd
+pipeline
+pipelines
+deploy
+deployment
+rollback
+autoscaling
+balancer
+microservice
+microservices
+container
+containers
+orchestration
+
+# Cloud providers and services
+aws
+gcp
+azure
+cloudflare
+vercel
+netlify
+heroku
+firebase
+supabase
+digitalocean
+
+# Version control and collaboration
+git
+github
+gitlab
+bitbucket
+repo
+repos
+monorepo
+changelog
+commit
+commits
+rebase
+merge
+codebase
+hotfix
+changeset
+
+# Programming concepts
+async
+await
+callback
+callbacks
+boolean
+enum
+struct
+regex
+stdin
+stdout
+stderr
+config
+configs
+metadata
+dataset
+datasets
+workflow
+workflows
+plugin
+plugins
+framework
+frameworks
+sdk
+cli
+gui
+ide
+debugger
+breakpoint
+recursion
+memoization
+multithreading
+serialization
+deserialization
+preprocessor
+middleware
+
+# AI and data
+chatgpt
+openai
+anthropic
+llm
+llms
+chatbot
+chatbots
+embeddings
+tokenization
+finetuning
+inference
+
+# Web3 and crypto
+blockchain
+bitcoin
+ethereum
+crypto
+cryptocurrency
+nft
+nfts
+
+# Product and UX
+ux
+ui
+onboarding
+login
+logout
+signup
+username
+usernames
+changelog
+screenshot
+screenshots
+emoji
+emojis
+hashtag
+hashtags
+clickable
+scrollable
+swipeable

src-tauri/src/epub.rs

@@ -5,9 +5,6 @@ use std::io::{Read, Write};
 use zip::write::SimpleFileOptions;
 use zip::{CompressionMethod, ZipArchive, ZipWriter};
 
-static LITERATA: &[u8] = include_bytes!("../../public/fonts/Literata-VF.ttf");
-static LITERATA_ITALIC: &[u8] = include_bytes!("../../public/fonts/Literata-Italic-VF.ttf");
-
 #[derive(Deserialize, Serialize)]
 pub struct EpubFile {
     path: String,
@@ -48,14 +45,6 @@ fn build(files: &[EpubFile]) -> Result<Vec<u8>, String> {
         zip.write_all(&bytes).map_err(|e| e.to_string())?;
     }
 
-    for (path, bytes) in [
-        ("OEBPS/fonts/Literata-VF.ttf", LITERATA),
-        ("OEBPS/fonts/Literata-Italic-VF.ttf", LITERATA_ITALIC),
-    ] {
-        zip.start_file(path, deflated).map_err(|e| e.to_string())?;
-        zip.write_all(bytes).map_err(|e| e.to_string())?;
-    }
-
     Ok(zip.finish().map_err(|e| e.to_string())?.into_inner())
 }
 

src-tauri/src/fonts.rs

@@ -0,0 +1,47 @@
+use fontdb::{Database, Family, Query};
+
+fn system_db() -> Database {
+    let mut db = Database::new();
+    db.load_system_fonts();
+    db
+}
+
+#[tauri::command(async)]
+pub fn list_system_fonts() -> Vec<String> {
+    let db = system_db();
+    let mut names: Vec<String> = db
+        .faces()
+        .filter_map(|face| face.families.first().map(|(name, _)| name.clone()))
+        .collect();
+    names.sort();
+    names.dedup();
+    names
+}
+
+pub fn system_font_bytes(family: &str) -> Vec<Vec<u8>> {
+    let db = system_db();
+    let mut out = Vec::new();
+    let styles = [
+        (fontdb::Weight::NORMAL, fontdb::Style::Normal),
+        (fontdb::Weight::NORMAL, fontdb::Style::Italic),
+        (fontdb::Weight::BOLD, fontdb::Style::Normal),
+        (fontdb::Weight::BOLD, fontdb::Style::Italic),
+    ];
+    let mut seen = std::collections::HashSet::new();
+    for (weight, style) in styles {
+        let query = Query {
+            families: &[Family::Name(family)],
+            weight,
+            style,
+            ..Query::default()
+        };
+        if let Some(id) = db.query(&query) {
+            if seen.insert(id) {
+                if let Some(bytes) = db.with_face_data(id, |data, _index| data.to_vec()) {
+                    out.push(bytes);
+                }
+            }
+        }
+    }
+    out
+}

src-tauri/src/gdrive.rs

@@ -0,0 +1,806 @@
+use base64::Engine;
+use base64::engine::general_purpose::URL_SAFE_NO_PAD;
+use rand::RngCore;
+use serde::de::DeserializeOwned;
+use serde::{Deserialize, Serialize};
+use sha2::{Digest, Sha256};
+use std::collections::HashMap;
+use std::fs;
+use std::io::{Read, Write};
+use std::net::{TcpListener, TcpStream};
+use std::path::PathBuf;
+use std::sync::{LazyLock, Mutex};
+use std::time::{Duration, Instant, SystemTime, UNIX_EPOCH};
+use tauri::{Emitter, Manager};
+
+const FOLDER_NAME: &str = "margin";
+const DICTIONARY_NAME: &str = "custom-dictionary.txt";
+const SCOPES: &str = "openid email https://www.googleapis.com/auth/drive.file";
+const AUTH_TIMEOUT_SECS: u64 = 120;
+
+const CREDENTIALS_JSON: &str =
+    include_str!(concat!(env!("CARGO_MANIFEST_DIR"), "/../google-credentials.json"));
+
+static HTTP: LazyLock<reqwest::Client> = LazyLock::new(reqwest::Client::new);
+
+#[derive(Deserialize)]
+struct CredentialsFile {
+    installed: Credentials,
+}
+
+#[derive(Deserialize)]
+struct Credentials {
+    client_id: String,
+    client_secret: String,
+    auth_uri: String,
+    token_uri: String,
+}
+
+fn load_credentials() -> Result<Credentials, String> {
+    let runtime_path = concat!(env!("CARGO_MANIFEST_DIR"), "/../google-credentials.json");
+    let raw = fs::read_to_string(runtime_path).unwrap_or_else(|_| CREDENTIALS_JSON.to_string());
+    let parsed: CredentialsFile = serde_json::from_str(&raw)
+        .map_err(|e| format!("invalid google-credentials.json: {e}"))?;
+    let creds = parsed.installed;
+    if creds.client_id.starts_with("YOUR_CLIENT_ID") || creds.client_secret.starts_with("YOUR_CLIENT_SECRET") {
+        return Err("Google Drive is not set up yet. Add a real OAuth desktop client to google-credentials.json.".to_string());
+    }
+    Ok(creds)
+}
+
+#[derive(Default)]
+pub struct GDriveState(pub Mutex<Session>);
+
+#[derive(Default)]
+pub struct Session {
+    refresh_token: Option<String>,
+    access_token: Option<String>,
+    access_expiry: u64,
+    email: Option<String>,
+    folder_id: Option<String>,
+}
+
+#[derive(Serialize, Deserialize, Default)]
+struct BackupState {
+    #[serde(default)]
+    refresh_token: Option<String>,
+    email: Option<String>,
+    folder_id: Option<String>,
+    last_backup: Option<u64>,
+    #[serde(default)]
+    files: HashMap<String, FileRecord>,
+}
+
+#[derive(Serialize, Deserialize, Clone)]
+struct FileRecord {
+    hash: String,
+    drive_id: String,
+}
+
+#[derive(Serialize)]
+#[serde(rename_all = "camelCase")]
+pub struct Status {
+    connected: bool,
+    email: Option<String>,
+    last_backup: Option<u64>,
+    pending: bool,
+}
+
+#[derive(Serialize)]
+#[serde(rename_all = "camelCase")]
+pub struct RestoreResult {
+    restored: usize,
+}
+
+#[derive(Serialize)]
+#[serde(rename_all = "camelCase")]
+pub struct BackupOutcome {
+    uploaded: usize,
+    #[serde(flatten)]
+    status: Status,
+}
+
+#[derive(Serialize)]
+#[serde(rename_all = "camelCase")]
+pub struct RemoteBackup {
+    name: String,
+}
+
+#[derive(Clone, Serialize)]
+#[serde(rename_all = "camelCase")]
+struct AuthEvent {
+    ok: bool,
+    error: Option<String>,
+}
+
+fn now() -> u64 {
+    SystemTime::now().duration_since(UNIX_EPOCH).unwrap_or_default().as_secs()
+}
+
+fn dictionary_path(app: &tauri::AppHandle) -> Result<PathBuf, String> {
+    Ok(crate::library::app_data_dir(app)?.join(DICTIONARY_NAME))
+}
+
+fn state_path(app: &tauri::AppHandle) -> Result<PathBuf, String> {
+    Ok(crate::library::app_data_dir(app)?.join("backup.json"))
+}
+
+fn load_state(app: &tauri::AppHandle) -> BackupState {
+    let path = match state_path(app) {
+        Ok(p) => p,
+        Err(_) => return BackupState::default(),
+    };
+    match fs::read_to_string(&path) {
+        Ok(contents) => serde_json::from_str(&contents).unwrap_or_default(),
+        Err(_) => BackupState::default(),
+    }
+}
+
+fn save_state(app: &tauri::AppHandle, state: &BackupState) -> Result<(), String> {
+    let path = state_path(app)?;
+    let contents = serde_json::to_string_pretty(state).map_err(|e| e.to_string())?;
+    crate::project::atomic_write(&path, contents.as_bytes(), false)
+}
+
+fn random_b64(bytes: usize) -> String {
+    let mut buf = vec![0u8; bytes];
+    rand::thread_rng().fill_bytes(&mut buf);
+    URL_SAFE_NO_PAD.encode(buf)
+}
+
+fn pkce_challenge(verifier: &str) -> String {
+    let mut hasher = Sha256::new();
+    hasher.update(verifier.as_bytes());
+    URL_SAFE_NO_PAD.encode(hasher.finalize())
+}
+
+fn hash_bytes(bytes: &[u8]) -> String {
+    let mut hasher = Sha256::new();
+    hasher.update(bytes);
+    format!("{:x}", hasher.finalize())
+}
+
+fn urlencode(s: &str) -> String {
+    url::form_urlencoded::byte_serialize(s.as_bytes()).collect()
+}
+
+fn drive_escape(s: &str) -> String {
+    s.replace('\\', "\\\\").replace('\'', "\\'")
+}
+
+fn safe_book_name(name: &str) -> bool {
+    match name.strip_suffix(".margin") {
+        Some(stem) => !stem.is_empty() && stem.chars().all(|c| c.is_ascii_alphanumeric() || c == '-' || c == '_'),
+        None => false,
+    }
+}
+
+fn write_http_message(stream: &mut TcpStream, message: &str) {
+    let body = format!(
+        "<!doctype html><html><head><meta charset=\"utf-8\"><title>margin</title></head>\
+         <body style=\"font-family:system-ui,sans-serif;text-align:center;padding-top:80px;color:#222\">\
+         <h2>{message}</h2></body></html>"
+    );
+    let response = format!(
+        "HTTP/1.1 200 OK\r\nContent-Type: text/html; charset=utf-8\r\nContent-Length: {}\r\nConnection: close\r\n\r\n{}",
+        body.len(),
+        body
+    );
+    let _ = stream.write_all(response.as_bytes());
+    let _ = stream.flush();
+}
+
+fn await_code(listener: TcpListener, expected_state: &str, deadline: Instant) -> Result<String, String> {
+    listener.set_nonblocking(true).map_err(|e| e.to_string())?;
+    loop {
+        if Instant::now() > deadline {
+            return Err("Timed out waiting for Google authorization.".to_string());
+        }
+        match listener.accept() {
+            Ok((mut stream, _)) => {
+                stream.set_nonblocking(false).ok();
+                stream.set_read_timeout(Some(Duration::from_secs(5))).ok();
+                let mut buf = [0u8; 8192];
+                let n = stream.read(&mut buf).unwrap_or(0);
+                let request = String::from_utf8_lossy(&buf[..n]);
+                let path = request.lines().next().and_then(|line| line.split_whitespace().nth(1)).unwrap_or("");
+                if path == "/favicon.ico" {
+                    write_http_message(&mut stream, "margin");
+                    continue;
+                }
+                let full = format!("http://127.0.0.1{path}");
+                let parsed = match url::Url::parse(&full) {
+                    Ok(p) => p,
+                    Err(_) => {
+                        write_http_message(&mut stream, "Waiting for Google…");
+                        continue;
+                    }
+                };
+                let mut code = None;
+                let mut state = None;
+                let mut error = None;
+                for (key, value) in parsed.query_pairs() {
+                    match key.as_ref() {
+                        "code" => code = Some(value.into_owned()),
+                        "state" => state = Some(value.into_owned()),
+                        "error" => error = Some(value.into_owned()),
+                        _ => {}
+                    }
+                }
+                if let Some(error) = error {
+                    write_http_message(&mut stream, "Authorization was cancelled. You can close this tab.");
+                    return Err(format!("Google authorization failed: {error}"));
+                }
+                match (code, state) {
+                    (Some(code), Some(state)) if state == expected_state => {
+                        write_http_message(&mut stream, "Connected to margin. You can close this tab.");
+                        return Ok(code);
+                    }
+                    (Some(_), _) => {
+                        write_http_message(&mut stream, "Could not verify the request. You can close this tab.");
+                        return Err("State mismatch during Google authorization.".to_string());
+                    }
+                    _ => {
+                        write_http_message(&mut stream, "Waiting for Google…");
+                    }
+                }
+            }
+            Err(ref e) if e.kind() == std::io::ErrorKind::WouldBlock => {
+                std::thread::sleep(Duration::from_millis(150));
+            }
+            Err(e) => return Err(e.to_string()),
+        }
+    }
+}
+
+#[derive(Deserialize)]
+struct TokenResponse {
+    access_token: String,
+    #[serde(default)]
+    refresh_token: Option<String>,
+    #[serde(default)]
+    expires_in: u64,
+}
+
+#[derive(Deserialize)]
+struct UserInfo {
+    #[serde(default)]
+    email: Option<String>,
+}
+
+#[derive(Deserialize)]
+struct DriveFile {
+    id: String,
+    #[serde(default)]
+    name: String,
+}
+
+#[derive(Deserialize)]
+struct FileList {
+    #[serde(default)]
+    files: Vec<DriveFile>,
+    #[serde(default, rename = "nextPageToken")]
+    next_page_token: Option<String>,
+}
+
+async fn read_json<T: DeserializeOwned>(resp: reqwest::Response, context: &str) -> Result<T, String> {
+    let status = resp.status();
+    let text = resp.text().await.map_err(|e| e.to_string())?;
+    if !status.is_success() {
+        return Err(format!("{context} failed ({status}): {text}"));
+    }
+    serde_json::from_str(&text).map_err(|e| format!("{context}: could not parse response: {e}"))
+}
+
+async fn exchange_code(creds: &Credentials, code: &str, redirect: &str, verifier: &str) -> Result<TokenResponse, String> {
+    let resp = HTTP
+        .post(&creds.token_uri)
+        .form(&[
+            ("client_id", creds.client_id.as_str()),
+            ("client_secret", creds.client_secret.as_str()),
+            ("code", code),
+            ("code_verifier", verifier),
+            ("grant_type", "authorization_code"),
+            ("redirect_uri", redirect),
+        ])
+        .send()
+        .await
+        .map_err(|e| e.to_string())?;
+    read_json(resp, "Google token exchange").await
+}
+
+async fn refresh_access_token(creds: &Credentials, refresh_token: &str) -> Result<TokenResponse, String> {
+    let resp = HTTP
+        .post(&creds.token_uri)
+        .form(&[
+            ("client_id", creds.client_id.as_str()),
+            ("client_secret", creds.client_secret.as_str()),
+            ("refresh_token", refresh_token),
+            ("grant_type", "refresh_token"),
+        ])
+        .send()
+        .await
+        .map_err(|e| e.to_string())?;
+    read_json(resp, "Google token refresh").await
+}
+
+async fn fetch_email(access_token: &str) -> Result<String, String> {
+    let resp = HTTP
+        .get("https://www.googleapis.com/oauth2/v2/userinfo")
+        .bearer_auth(access_token)
+        .send()
+        .await
+        .map_err(|e| e.to_string())?;
+    let info: UserInfo = read_json(resp, "Google account lookup").await?;
+    Ok(info.email.unwrap_or_default())
+}
+
+async fn ensure_folder(access_token: &str) -> Result<String, String> {
+    let query = format!(
+        "name = '{}' and mimeType = 'application/vnd.google-apps.folder' and trashed = false",
+        drive_escape(FOLDER_NAME)
+    );
+    let resp = HTTP
+        .get("https://www.googleapis.com/drive/v3/files")
+        .bearer_auth(access_token)
+        .query(&[
+            ("q", query.as_str()),
+            ("fields", "files(id,name)"),
+            ("spaces", "drive"),
+            ("pageSize", "1"),
+        ])
+        .send()
+        .await
+        .map_err(|e| e.to_string())?;
+    let list: FileList = read_json(resp, "Drive folder lookup").await?;
+    if let Some(folder) = list.files.into_iter().next() {
+        return Ok(folder.id);
+    }
+    let body = serde_json::json!({
+        "name": FOLDER_NAME,
+        "mimeType": "application/vnd.google-apps.folder",
+    });
+    let resp = HTTP
+        .post("https://www.googleapis.com/drive/v3/files")
+        .bearer_auth(access_token)
+        .query(&[("fields", "id")])
+        .json(&body)
+        .send()
+        .await
+        .map_err(|e| e.to_string())?;
+    let created: DriveFile = read_json(resp, "Drive folder creation").await?;
+    Ok(created.id)
+}
+
+async fn find_file(access_token: &str, folder_id: &str, name: &str) -> Result<Option<DriveFile>, String> {
+    let query = format!(
+        "'{}' in parents and name = '{}' and trashed = false",
+        drive_escape(folder_id),
+        drive_escape(name)
+    );
+    let resp = HTTP
+        .get("https://www.googleapis.com/drive/v3/files")
+        .bearer_auth(access_token)
+        .query(&[
+            ("q", query.as_str()),
+            ("fields", "files(id,name)"),
+            ("spaces", "drive"),
+            ("pageSize", "1"),
+        ])
+        .send()
+        .await
+        .map_err(|e| e.to_string())?;
+    let list: FileList = read_json(resp, "Drive file lookup").await?;
+    Ok(list.files.into_iter().next())
+}
+
+async fn list_in_folder(access_token: &str, folder_id: &str) -> Result<Vec<DriveFile>, String> {
+    let query = format!("'{}' in parents and trashed = false", drive_escape(folder_id));
+    let mut files = Vec::new();
+    let mut page_token: Option<String> = None;
+    loop {
+        let mut request = HTTP
+            .get("https://www.googleapis.com/drive/v3/files")
+            .bearer_auth(access_token)
+            .query(&[
+                ("q", query.as_str()),
+                ("fields", "nextPageToken,files(id,name)"),
+                ("spaces", "drive"),
+                ("pageSize", "100"),
+            ]);
+        if let Some(token) = &page_token {
+            request = request.query(&[("pageToken", token.as_str())]);
+        }
+        let resp = request.send().await.map_err(|e| e.to_string())?;
+        let FileList { files: page, next_page_token } = read_json(resp, "Drive file list").await?;
+        files.extend(page);
+        match next_page_token {
+            Some(token) => page_token = Some(token),
+            None => break,
+        }
+    }
+    Ok(files)
+}
+
+async fn upload_file(
+    access_token: &str,
+    folder_id: &str,
+    name: &str,
+    bytes: &[u8],
+    existing_id: Option<String>,
+) -> Result<DriveFile, String> {
+    let boundary = "margin7f3e2a1b9c8d";
+    let metadata = match &existing_id {
+        Some(_) => serde_json::json!({ "name": name }),
+        None => serde_json::json!({ "name": name, "parents": [folder_id] }),
+    };
+    let mut body: Vec<u8> = Vec::new();
+    body.extend_from_slice(format!("--{boundary}\r\nContent-Type: application/json; charset=UTF-8\r\n\r\n").as_bytes());
+    body.extend_from_slice(serde_json::to_string(&metadata).unwrap_or_default().as_bytes());
+    body.extend_from_slice(format!("\r\n--{boundary}\r\nContent-Type: application/octet-stream\r\n\r\n").as_bytes());
+    body.extend_from_slice(bytes);
+    body.extend_from_slice(format!("\r\n--{boundary}--\r\n").as_bytes());
+
+    let request = match &existing_id {
+        Some(id) => HTTP.patch(format!("https://www.googleapis.com/upload/drive/v3/files/{id}")),
+        None => HTTP.post("https://www.googleapis.com/upload/drive/v3/files"),
+    };
+    let resp = request
+        .bearer_auth(access_token)
+        .query(&[("uploadType", "multipart"), ("fields", "id")])
+        .header(reqwest::header::CONTENT_TYPE, format!("multipart/related; boundary={boundary}"))
+        .body(body)
+        .send()
+        .await
+        .map_err(|e| e.to_string())?;
+    read_json(resp, &format!("Drive upload of {name}")).await
+}
+
+async fn download_file(access_token: &str, id: &str) -> Result<Vec<u8>, String> {
+    let resp = HTTP
+        .get(format!("https://www.googleapis.com/drive/v3/files/{id}"))
+        .bearer_auth(access_token)
+        .query(&[("alt", "media")])
+        .send()
+        .await
+        .map_err(|e| e.to_string())?;
+    let status = resp.status();
+    if !status.is_success() {
+        let text = resp.text().await.unwrap_or_default();
+        return Err(format!("Drive download failed ({status}): {text}"));
+    }
+    Ok(resp.bytes().await.map_err(|e| e.to_string())?.to_vec())
+}
+
+async fn valid_access_token(app: &tauri::AppHandle, state: &GDriveState) -> Result<String, String> {
+    let (access, expiry, refresh) = {
+        let session = state.0.lock().unwrap();
+        (session.access_token.clone(), session.access_expiry, session.refresh_token.clone())
+    };
+    if let Some(token) = access {
+        if now() < expiry {
+            return Ok(token);
+        }
+    }
+    let refresh = refresh.ok_or("Not connected to Google Drive.")?;
+    let creds = load_credentials()?;
+    let tokens = refresh_access_token(&creds, &refresh).await?;
+    let access_token = tokens.access_token.clone();
+    {
+        let mut session = state.0.lock().unwrap();
+        session.access_token = Some(tokens.access_token);
+        session.access_expiry = now() + tokens.expires_in.saturating_sub(60);
+        if let Some(rotated) = &tokens.refresh_token {
+            session.refresh_token = Some(rotated.clone());
+        }
+    }
+    if let Some(rotated) = &tokens.refresh_token {
+        let mut stored = load_state(app);
+        stored.refresh_token = Some(rotated.clone());
+        let _ = save_state(app, &stored);
+    }
+    Ok(access_token)
+}
+
+async fn ensure_folder_id(app: &tauri::AppHandle, state: &GDriveState, access_token: &str) -> Result<String, String> {
+    {
+        let session = state.0.lock().unwrap();
+        if let Some(folder) = &session.folder_id {
+            return Ok(folder.clone());
+        }
+    }
+    let folder_id = ensure_folder(access_token).await?;
+    {
+        let mut session = state.0.lock().unwrap();
+        session.folder_id = Some(folder_id.clone());
+    }
+    let mut stored = load_state(app);
+    stored.folder_id = Some(folder_id.clone());
+    save_state(app, &stored)?;
+    Ok(folder_id)
+}
+
+fn collect_local_files(app: &tauri::AppHandle) -> Result<Vec<(String, Vec<u8>)>, String> {
+    let mut files = Vec::new();
+    let library = crate::library::library_dir(app)?;
+    for entry in fs::read_dir(&library).map_err(|e| e.to_string())? {
+        let path = match entry {
+            Ok(entry) => entry.path(),
+            Err(_) => continue,
+        };
+        if path.extension().and_then(|e| e.to_str()) != Some("margin") {
+            continue;
+        }
+        let name = match path.file_name().and_then(|n| n.to_str()) {
+            Some(name) if safe_book_name(name) => name.to_string(),
+            _ => continue,
+        };
+        let bytes = fs::read(&path).map_err(|e| e.to_string())?;
+        files.push((name, bytes));
+    }
+    let dictionary = dictionary_path(app)?;
+    if dictionary.exists() {
+        let bytes = fs::read(&dictionary).map_err(|e| e.to_string())?;
+        files.push((DICTIONARY_NAME.to_string(), bytes));
+    }
+    Ok(files)
+}
+
+fn file_pending(path: &std::path::Path, name: &str, stored: &BackupState, last_backup: u64) -> bool {
+    let record = match stored.files.get(name) {
+        Some(record) => record,
+        None => return true,
+    };
+    let touched = fs::metadata(path)
+        .and_then(|meta| meta.modified())
+        .ok()
+        .and_then(|time| time.duration_since(UNIX_EPOCH).ok())
+        .map(|since| since.as_secs() > last_backup)
+        .unwrap_or(true);
+    if !touched {
+        return false;
+    }
+    match fs::read(path) {
+        Ok(bytes) => record.hash != hash_bytes(&bytes),
+        Err(_) => false,
+    }
+}
+
+fn compute_pending(app: &tauri::AppHandle, stored: &BackupState) -> bool {
+    let last_backup = stored.last_backup.unwrap_or(0);
+    let library = match crate::library::library_dir(app) {
+        Ok(dir) => dir,
+        Err(_) => return false,
+    };
+    if let Ok(entries) = fs::read_dir(&library) {
+        for entry in entries.flatten() {
+            let path = entry.path();
+            if path.extension().and_then(|e| e.to_str()) != Some("margin") {
+                continue;
+            }
+            if let Some(name) = path.file_name().and_then(|n| n.to_str()) {
+                if safe_book_name(name) && file_pending(&path, name, stored, last_backup) {
+                    return true;
+                }
+            }
+        }
+    }
+    match dictionary_path(app) {
+        Ok(dict) if dict.exists() => file_pending(&dict, DICTIONARY_NAME, stored, last_backup),
+        _ => false,
+    }
+}
+
+fn status_inner(app: &tauri::AppHandle, state: &GDriveState) -> Status {
+    let (connected, email) = {
+        let session = state.0.lock().unwrap();
+        (session.refresh_token.is_some(), session.email.clone())
+    };
+    let stored = load_state(app);
+    let pending = connected && compute_pending(app, &stored);
+    Status {
+        connected,
+        email: email.or(stored.email),
+        last_backup: stored.last_backup,
+        pending,
+    }
+}
+
+pub fn init_session(app: &tauri::AppHandle) {
+    let state = app.state::<GDriveState>();
+    let stored = load_state(app);
+    let mut session = state.0.lock().unwrap();
+    session.refresh_token = stored.refresh_token;
+    session.email = stored.email;
+    session.folder_id = stored.folder_id;
+}
+
+async fn complete_auth(
+    app: &tauri::AppHandle,
+    listener: TcpListener,
+    csrf: String,
+    verifier: String,
+    redirect: String,
+    creds: Credentials,
+) -> Result<(), String> {
+    let code = tauri::async_runtime::spawn_blocking(move || {
+        let deadline = Instant::now() + Duration::from_secs(AUTH_TIMEOUT_SECS);
+        await_code(listener, &csrf, deadline)
+    })
+    .await
+    .map_err(|e| e.to_string())??;
+
+    let tokens = exchange_code(&creds, &code, &redirect, &verifier).await?;
+    let email = fetch_email(&tokens.access_token).await?;
+    let folder_id = ensure_folder(&tokens.access_token).await?;
+
+    {
+        let state = app.state::<GDriveState>();
+        let mut session = state.0.lock().unwrap();
+        if let Some(refresh) = &tokens.refresh_token {
+            session.refresh_token = Some(refresh.clone());
+        }
+        session.access_token = Some(tokens.access_token.clone());
+        session.access_expiry = now() + tokens.expires_in.saturating_sub(60);
+        session.email = Some(email.clone());
+        session.folder_id = Some(folder_id.clone());
+    }
+
+    let mut stored = load_state(app);
+    if let Some(refresh) = &tokens.refresh_token {
+        stored.refresh_token = Some(refresh.clone());
+    }
+    stored.email = Some(email);
+    stored.folder_id = Some(folder_id);
+    save_state(app, &stored)?;
+    Ok(())
+}
+
+#[tauri::command]
+pub async fn gdrive_connect(app: tauri::AppHandle) -> Result<String, String> {
+    let creds = load_credentials()?;
+    let verifier = random_b64(64);
+    let challenge = pkce_challenge(&verifier);
+    let csrf = random_b64(24);
+
+    let listener = TcpListener::bind("127.0.0.1:0").map_err(|e| e.to_string())?;
+    let port = listener.local_addr().map_err(|e| e.to_string())?.port();
+    let redirect = format!("http://127.0.0.1:{port}");
+
+    let auth_url = format!(
+        "{}?client_id={}&redirect_uri={}&response_type=code&scope={}&code_challenge={}&code_challenge_method=S256&state={}&access_type=offline&prompt=consent",
+        creds.auth_uri,
+        urlencode(&creds.client_id),
+        urlencode(&redirect),
+        urlencode(SCOPES),
+        challenge,
+        urlencode(&csrf),
+    );
+
+    use tauri_plugin_opener::OpenerExt;
+    let _ = app.opener().open_url(auth_url.clone(), None::<&str>);
+
+    let app_bg = app.clone();
+    tauri::async_runtime::spawn(async move {
+        let event = match complete_auth(&app_bg, listener, csrf, verifier, redirect, creds).await {
+            Ok(()) => AuthEvent { ok: true, error: None },
+            Err(error) => AuthEvent { ok: false, error: Some(error) },
+        };
+        let _ = app_bg.emit("gdrive-auth", event);
+    });
+
+    Ok(auth_url)
+}
+
+#[tauri::command]
+pub async fn gdrive_disconnect(app: tauri::AppHandle, state: tauri::State<'_, GDriveState>) -> Result<Status, String> {
+    let refresh = {
+        let session = state.0.lock().unwrap();
+        session.refresh_token.clone()
+    };
+    if let Some(refresh) = refresh {
+        let _ = HTTP
+            .post("https://oauth2.googleapis.com/revoke")
+            .form(&[("token", refresh.as_str())])
+            .send()
+            .await;
+    }
+    {
+        let mut session = state.0.lock().unwrap();
+        session.refresh_token = None;
+        session.access_token = None;
+        session.access_expiry = 0;
+        session.email = None;
+    }
+    let mut stored = load_state(&app);
+    stored.refresh_token = None;
+    stored.email = None;
+    save_state(&app, &stored)?;
+    Ok(status_inner(&app, &state))
+}
+
+#[tauri::command]
+pub async fn gdrive_status(app: tauri::AppHandle, state: tauri::State<'_, GDriveState>) -> Result<Status, String> {
+    Ok(status_inner(&app, &state))
+}
+
+#[tauri::command]
+pub async fn gdrive_backup(app: tauri::AppHandle, state: tauri::State<'_, GDriveState>) -> Result<BackupOutcome, String> {
+    let access_token = valid_access_token(&app, &state).await?;
+    let folder_id = ensure_folder_id(&app, &state, &access_token).await?;
+    let files = collect_local_files(&app)?;
+    let mut stored = load_state(&app);
+    let mut uploaded = 0;
+    for (name, bytes) in &files {
+        let hash = hash_bytes(bytes);
+        let existing = stored.files.get(name).cloned();
+        if let Some(record) = &existing {
+            if record.hash == hash {
+                continue;
+            }
+        }
+        let drive_id = match &existing {
+            Some(record) => Some(record.drive_id.clone()),
+            None => find_file(&access_token, &folder_id, name).await?.map(|file| file.id),
+        };
+        let result = upload_file(&access_token, &folder_id, name, bytes, drive_id).await?;
+        stored.files.insert(name.clone(), FileRecord { hash, drive_id: result.id });
+        uploaded += 1;
+    }
+    if uploaded > 0 {
+        stored.last_backup = Some(now());
+        save_state(&app, &stored)?;
+    }
+    Ok(BackupOutcome {
+        uploaded,
+        status: Status {
+            connected: true,
+            email: stored.email.clone(),
+            last_backup: stored.last_backup,
+            pending: false,
+        },
+    })
+}
+
+#[tauri::command]
+pub async fn gdrive_restore(app: tauri::AppHandle, state: tauri::State<'_, GDriveState>) -> Result<RestoreResult, String> {
+    let access_token = valid_access_token(&app, &state).await?;
+    let folder_id = ensure_folder_id(&app, &state, &access_token).await?;
+    let remote = list_in_folder(&access_token, &folder_id).await?;
+    let mut stored = load_state(&app);
+    let mut restored = 0;
+    for file in &remote {
+        let is_dictionary = file.name == DICTIONARY_NAME;
+        let is_book = safe_book_name(&file.name);
+        if !is_dictionary && !is_book {
+            continue;
+        }
+        let bytes = download_file(&access_token, &file.id).await?;
+        let destination = if is_dictionary {
+            dictionary_path(&app)?
+        } else {
+            crate::library::library_dir(&app)?.join(&file.name)
+        };
+        crate::project::atomic_write(&destination, &bytes, false)?;
+        stored.files.insert(
+            file.name.clone(),
+            FileRecord { hash: hash_bytes(&bytes), drive_id: file.id.clone() },
+        );
+        restored += 1;
+    }
+    stored.last_backup = Some(now());
+    save_state(&app, &stored)?;
+    Ok(RestoreResult { restored })
+}
+
+#[tauri::command]
+pub async fn gdrive_list_backups(app: tauri::AppHandle, state: tauri::State<'_, GDriveState>) -> Result<Vec<RemoteBackup>, String> {
+    let access_token = valid_access_token(&app, &state).await?;
+    let folder_id = ensure_folder_id(&app, &state, &access_token).await?;
+    let remote = list_in_folder(&access_token, &folder_id).await?;
+    Ok(remote
+        .into_iter()
+        .filter(|file| safe_book_name(&file.name))
+        .map(|file| RemoteBackup { name: file.name })
+        .collect())
+}

src-tauri/src/lib.rs

@@ -1,58 +1,131 @@
 mod epub;
+mod fonts;
+mod gdrive;
 mod library;
+#[cfg(target_os = "macos")]
+mod macspell;
 mod pdf;
 mod project;
 mod proofing;
 
+#[cfg(desktop)]
 use tauri::menu::{Menu, MenuItemBuilder, MenuItemKind, PredefinedMenuItem, SubmenuBuilder};
+#[cfg(desktop)]
 use tauri::{Emitter, Runtime};
 
+#[cfg(desktop)]
 fn build_menu<R: Runtime>(handle: &tauri::AppHandle<R>) -> tauri::Result<Menu<R>> {
     let menu = Menu::default(handle)?;
+
     let new_book = MenuItemBuilder::with_id("new-book", "New Book")
         .accelerator("CmdOrCtrl+N")
         .build(handle)?;
-    let export_pdf = MenuItemBuilder::with_id("export-pdf", "Export as PDF…").build(handle)?;
-    let export_epub = MenuItemBuilder::with_id("export-epub", "Export as EPUB…").build(handle)?;
+    let save = MenuItemBuilder::with_id("save", "Save")
+        .accelerator("CmdOrCtrl+S")
+        .build(handle)?;
+    let export_pdf = MenuItemBuilder::with_id("export-pdf", "Export as PDF…")
+        .accelerator("CmdOrCtrl+Shift+P")
+        .build(handle)?;
+    let export_epub = MenuItemBuilder::with_id("export-epub", "Export as EPUB…")
+        .accelerator("CmdOrCtrl+Shift+E")
+        .build(handle)?;
     let check_updates =
         MenuItemBuilder::with_id("check-updates", "Check for Updates…").build(handle)?;
+    let settings = MenuItemBuilder::with_id("settings", "Settings…")
+        .accelerator("CmdOrCtrl+,")
+        .build(handle)?;
+    let find = MenuItemBuilder::with_id("find", "Find…")
+        .accelerator("CmdOrCtrl+F")
+        .build(handle)?;
+    let report_issue =
+        MenuItemBuilder::with_id("report-issue", "Report an Issue…").build(handle)?;
 
-    let file_submenu = menu
+    let submenus: Vec<_> = menu
         .items()?
         .into_iter()
-        .find_map(|item| match item {
-            MenuItemKind::Submenu(submenu)
-                if submenu.text().map(|t| t == "File").unwrap_or(false) =>
-            {
-                Some(submenu)
-            }
+        .filter_map(|item| match item {
+            MenuItemKind::Submenu(submenu) => Some(submenu),
             _ => None,
-        });
+        })
+        .collect();
 
-    match file_submenu {
+    let find_submenu = |name: &str| {
+        submenus
+            .iter()
+            .find(|submenu| submenu.text().map(|t| t == name).unwrap_or(false))
+            .cloned()
+    };
+
+    match find_submenu("File") {
         Some(submenu) => {
             submenu.prepend_items(&[
                 &new_book,
                 &PredefinedMenuItem::separator(handle)?,
+                &save,
+                &PredefinedMenuItem::separator(handle)?,
                 &export_pdf,
                 &export_epub,
                 &PredefinedMenuItem::separator(handle)?,
-                &check_updates,
-                &PredefinedMenuItem::separator(handle)?,
             ])?;
         }
         None => {
             let submenu = SubmenuBuilder::new(handle, "File")
                 .item(&new_book)
                 .item(&PredefinedMenuItem::separator(handle)?)
+                .item(&save)
+                .item(&PredefinedMenuItem::separator(handle)?)
                 .item(&export_pdf)
                 .item(&export_epub)
-                .item(&PredefinedMenuItem::separator(handle)?)
-                .item(&check_updates)
                 .build()?;
             menu.insert(&submenu, 1)?;
         }
     }
+
+    if let Some(edit) = find_submenu("Edit") {
+        edit.append_items(&[&PredefinedMenuItem::separator(handle)?, &find])?;
+    }
+
+    if let Some(help) = find_submenu("Help") {
+        help.append_items(&[&report_issue])?;
+    }
+
+    #[cfg(target_os = "macos")]
+    {
+        if let Some(app_submenu) = submenus.first() {
+            app_submenu.insert(&check_updates, 1)?;
+            app_submenu.insert(&settings, 3)?;
+            app_submenu.insert(&PredefinedMenuItem::separator(handle)?, 4)?;
+        }
+        if let Some(view) = find_submenu("View") {
+            let toggle_chapters = MenuItemBuilder::with_id("toggle-chapters", "Toggle Chapters")
+                .accelerator("CmdOrCtrl+\\")
+                .build(handle)?;
+            let next_chapter = MenuItemBuilder::with_id("next-chapter", "Next Chapter")
+                .accelerator("CmdOrCtrl+Alt+Down")
+                .build(handle)?;
+            let prev_chapter = MenuItemBuilder::with_id("prev-chapter", "Previous Chapter")
+                .accelerator("CmdOrCtrl+Alt+Up")
+                .build(handle)?;
+            view.prepend_items(&[
+                &toggle_chapters,
+                &PredefinedMenuItem::separator(handle)?,
+                &next_chapter,
+                &prev_chapter,
+                &PredefinedMenuItem::separator(handle)?,
+            ])?;
+        }
+    }
+
+    #[cfg(not(target_os = "macos"))]
+    {
+        if let Some(file) = find_submenu("File") {
+            file.append_items(&[&PredefinedMenuItem::separator(handle)?, &check_updates])?;
+        }
+        if let Some(edit) = find_submenu("Edit") {
+            edit.append_items(&[&settings])?;
+        }
+    }
+
     Ok(menu)
 }
 
@@ -60,29 +133,56 @@ fn build_menu<R: Runtime>(handle: &tauri::AppHandle<R>) -> tauri::Result<Menu<R>
 pub fn run() {
     let context = tauri::generate_context!();
 
+    #[cfg_attr(mobile, allow(unused_mut))]
     let mut builder = tauri::Builder::default()
         .plugin(tauri_plugin_opener::init())
-        .plugin(tauri_plugin_dialog::init())
-        .plugin(tauri_plugin_process::init());
+        .plugin(tauri_plugin_dialog::init());
 
-    if context.config().plugins.0.contains_key("updater") {
-        builder = builder.plugin(tauri_plugin_updater::Builder::new().build());
+    #[cfg(desktop)]
+    {
+        builder = builder.plugin(tauri_plugin_process::init());
+        if context.config().plugins.0.contains_key("updater") {
+            builder = builder.plugin(tauri_plugin_updater::Builder::new().build());
+        }
+    }
+
+    builder = builder
+        .manage(proofing::new_state())
+        .manage(gdrive::GDriveState::default())
+        .setup(|app| {
+            gdrive::init_session(app.handle());
+            Ok(())
+        });
+
+    #[cfg(desktop)]
+    {
+        builder = builder
+            .menu(|handle| build_menu(handle))
+            .on_menu_event(|app, event| {
+                if matches!(
+                    event.id().0.as_str(),
+                    "new-book"
+                        | "save"
+                        | "export-pdf"
+                        | "export-epub"
+                        | "check-updates"
+                        | "settings"
+                        | "find"
+                        | "toggle-chapters"
+                        | "next-chapter"
+                        | "prev-chapter"
+                        | "report-issue"
+                ) {
+                    app.emit("menu-action", event.id().0.as_str()).ok();
+                }
+            });
     }
 
     builder
-        .manage(proofing::new_state())
-        .menu(|handle| build_menu(handle))
-        .on_menu_event(|app, event| {
-            if matches!(
-                event.id().0.as_str(),
-                "new-book" | "export-pdf" | "export-epub" | "check-updates"
-            ) {
-                app.emit("menu-action", event.id().0.as_str()).ok();
-            }
-        })
         .invoke_handler(tauri::generate_handler![
             epub::package_epub,
             epub::unzip_epub,
+            fonts::list_system_fonts,
             pdf::compile_pdf,
             project::read_file,
             project::write_file,
@@ -92,7 +192,13 @@ pub fn run() {
             library::save_book,
             library::delete_book,
             proofing::proof_text,
-            proofing::remember_word
+            proofing::remember_word,
+            gdrive::gdrive_connect,
+            gdrive::gdrive_disconnect,
+            gdrive::gdrive_status,
+            gdrive::gdrive_backup,
+            gdrive::gdrive_restore,
+            gdrive::gdrive_list_backups
         ])
         .run(context)
         .expect("error while running margin");

src-tauri/src/library.rs

@@ -19,12 +19,14 @@ fn corrupt_summary(stem: &str) -> BookSummary {
     }
 }
 
-fn library_dir(app: &tauri::AppHandle) -> Result<PathBuf, String> {
-    let dir = app
-        .path()
-        .app_data_dir()
-        .map_err(|e| e.to_string())?
-        .join("library");
+pub(crate) fn app_data_dir(app: &tauri::AppHandle) -> Result<PathBuf, String> {
+    let dir = app.path().app_data_dir().map_err(|e| e.to_string())?;
+    fs::create_dir_all(&dir).map_err(|e| e.to_string())?;
+    Ok(dir)
+}
+
+pub(crate) fn library_dir(app: &tauri::AppHandle) -> Result<PathBuf, String> {
+    let dir = app_data_dir(app)?.join("library");
     fs::create_dir_all(&dir).map_err(|e| e.to_string())?;
     Ok(dir)
 }

src-tauri/src/macspell.rs

@@ -0,0 +1,73 @@
+use std::collections::HashSet;
+
+use objc2::rc::autoreleasepool;
+use objc2_app_kit::NSSpellChecker;
+use objc2_foundation::{NSRange, NSString, NSTextCheckingType};
+
+pub struct MacIssue {
+    pub start: usize,
+    pub end: usize,
+    pub word: String,
+    pub suggestions: Vec<String>,
+}
+
+fn utf16_to_codepoint(text: &str, utf16_len: usize) -> Vec<usize> {
+    let mut map = Vec::with_capacity(utf16_len + 1);
+    let mut cp = 0;
+    for ch in text.chars() {
+        for _ in 0..ch.len_utf16() {
+            map.push(cp);
+        }
+        cp += 1;
+    }
+    map.push(cp);
+    map
+}
+
+pub fn check(text: &str, custom: &HashSet<String>) -> Vec<MacIssue> {
+    autoreleasepool(|_| {
+        let checker = NSSpellChecker::sharedSpellChecker();
+        let ns = NSString::from_str(text);
+        let len = ns.length();
+        let results = unsafe {
+            checker.checkString_range_types_options_inSpellDocumentWithTag_orthography_wordCount(
+                &ns,
+                NSRange { location: 0, length: len },
+                (NSTextCheckingType::Spelling | NSTextCheckingType::Link).bits(),
+                None,
+                0,
+                None,
+                std::ptr::null_mut(),
+            )
+        };
+
+        let map = utf16_to_codepoint(text, len);
+        let chars: Vec<char> = text.chars().collect();
+        let mut issues = Vec::new();
+        for result in results.iter() {
+            if result.resultType() != NSTextCheckingType::Spelling {
+                continue;
+            }
+            let range = result.range();
+            let start = map[range.location.min(len)];
+            let end = map[(range.location + range.length).min(len)];
+            let word: String = chars[start..end].iter().collect();
+            if custom.contains(&word.to_lowercase()) {
+                continue;
+            }
+            let mut suggestions = Vec::new();
+            if let Some(guesses) =
+                checker.guessesForWordRange_inString_language_inSpellDocumentWithTag(range, &ns, None, 0)
+            {
+                for guess in guesses.iter() {
+                    suggestions.push(guess.to_string());
+                    if suggestions.len() >= 5 {
+                        break;
+                    }
+                }
+            }
+            issues.push(MacIssue { start, end, word, suggestions });
+        }
+        issues
+    })
+}

src-tauri/src/pdf.rs

@@ -10,6 +10,29 @@ static LITERATA: &[u8] = include_bytes!("../../public/fonts/Literata-VF.ttf");
 static LITERATA_ITALIC: &[u8] = include_bytes!("../../public/fonts/Literata-Italic-VF.ttf");
 static HANKEN: &[u8] = include_bytes!("../../public/fonts/HankenGrotesk-VF.ttf");
 static HANKEN_ITALIC: &[u8] = include_bytes!("../../public/fonts/HankenGrotesk-Italic-VF.ttf");
+static EB_GARAMOND: &[u8] = include_bytes!("../../public/fonts/EBGaramond-VF.ttf");
+static EB_GARAMOND_ITALIC: &[u8] = include_bytes!("../../public/fonts/EBGaramond-Italic-VF.ttf");
+static LORA: &[u8] = include_bytes!("../../public/fonts/Lora-VF.ttf");
+static LORA_ITALIC: &[u8] = include_bytes!("../../public/fonts/Lora-Italic-VF.ttf");
+static SOURCE_SERIF: &[u8] = include_bytes!("../../public/fonts/SourceSerif4-VF.ttf");
+static SOURCE_SERIF_ITALIC: &[u8] = include_bytes!("../../public/fonts/SourceSerif4-Italic-VF.ttf");
+static FRAUNCES: &[u8] = include_bytes!("../../public/fonts/Fraunces-VF.ttf");
+static FRAUNCES_ITALIC: &[u8] = include_bytes!("../../public/fonts/Fraunces-Italic-VF.ttf");
+
+static EB_GARAMOND_FONTS: [&[u8]; 2] = [EB_GARAMOND, EB_GARAMOND_ITALIC];
+static LORA_FONTS: [&[u8]; 2] = [LORA, LORA_ITALIC];
+static SOURCE_SERIF_FONTS: [&[u8]; 2] = [SOURCE_SERIF, SOURCE_SERIF_ITALIC];
+static FRAUNCES_FONTS: [&[u8]; 2] = [FRAUNCES, FRAUNCES_ITALIC];
+
+fn bundled_font_bytes(id: &str) -> &'static [&'static [u8]] {
+    match id {
+        "eb-garamond" => &EB_GARAMOND_FONTS,
+        "lora" => &LORA_FONTS,
+        "source-serif" => &SOURCE_SERIF_FONTS,
+        "fraunces" => &FRAUNCES_FONTS,
+        _ => &[],
+    }
+}
 
 #[derive(Deserialize)]
 pub struct ImageInput {
@@ -17,7 +40,12 @@ pub struct ImageInput {
     data: String,
 }
 
-fn compile(source: String, images: &[ImageInput]) -> Result<(Vec<u8>, String), String> {
+fn compile(
+    source: String,
+    images: &[ImageInput],
+    bundled_fonts: &[String],
+    system_fonts: &[String],
+) -> Result<(Vec<u8>, String), String> {
     let mut binaries: Vec<(&str, Vec<u8>)> = Vec::with_capacity(images.len());
     for image in images {
         let bytes = STANDARD
@@ -26,9 +54,24 @@ fn compile(source: String, images: &[ImageInput]) -> Result<(Vec<u8>, String), S
         binaries.push((image.path.as_str(), bytes));
     }
 
+    let mut fonts: Vec<Vec<u8>> = vec![
+        LITERATA.to_vec(),
+        LITERATA_ITALIC.to_vec(),
+        HANKEN.to_vec(),
+        HANKEN_ITALIC.to_vec(),
+    ];
+    for id in bundled_fonts {
+        for bytes in bundled_font_bytes(id) {
+            fonts.push(bytes.to_vec());
+        }
+    }
+    for family in system_fonts {
+        fonts.extend(crate::fonts::system_font_bytes(family));
+    }
+
     let engine = TypstEngine::builder()
         .main_file(source)
-        .fonts([LITERATA, LITERATA_ITALIC, HANKEN, HANKEN_ITALIC])
+        .fonts(fonts)
         .with_static_file_resolver(binaries)
         .build();
 
@@ -50,8 +93,10 @@ pub fn compile_pdf(
     source: String,
     images: Vec<ImageInput>,
     emit_warnings: bool,
+    bundled_fonts: Vec<String>,
+    system_fonts: Vec<String>,
 ) -> Result<tauri::ipc::Response, String> {
-    let (bytes, warnings) = compile(source, &images)?;
+    let (bytes, warnings) = compile(source, &images, &bundled_fonts, &system_fonts)?;
     if emit_warnings && !warnings.is_empty() {
         app.emit("pdf-warnings", warnings).ok();
     }

src-tauri/src/proofing.rs

@@ -27,6 +27,7 @@ struct Harper {
 }
 
 pub struct Engine {
+    #[cfg(not(target_os = "macos"))]
     speller: Option<spellbook::Dictionary>,
     harper: Option<Harper>,
     custom: HashSet<String>,
@@ -59,11 +60,17 @@ fn read_words(contents: &str, set: &mut HashSet<String>) {
     for line in contents.lines() {
         let word = line.trim();
         if !word.is_empty() && !word.starts_with('#') {
-            set.insert(word.to_string());
+            set.insert(word.to_lowercase());
         }
     }
 }
 
+fn load_tech(app: &tauri::AppHandle, set: &mut HashSet<String>) {
+    if let Ok(contents) = dict_file(app, "tech.txt") {
+        read_words(&contents, set);
+    }
+}
+
 fn load_custom(app: &tauri::AppHandle) -> HashSet<String> {
     let mut set = HashSet::new();
     if let Ok(path) = custom_dict_path(app) {
@@ -81,6 +88,7 @@ fn load_custom(app: &tauri::AppHandle) -> HashSet<String> {
     set
 }
 
+#[cfg(not(target_os = "macos"))]
 fn build_speller(app: &tauri::AppHandle) -> Result<spellbook::Dictionary, String> {
     let aff = dict_file(app, "index.aff")?;
     let dic = dict_file(app, "index.dic")?;
@@ -94,14 +102,22 @@ fn build_harper() -> Harper {
     Harper { linter, dict }
 }
 
+#[cfg(not(target_os = "macos"))]
 fn is_word_char(c: char) -> bool {
     c.is_alphabetic()
 }
 
+#[cfg(not(target_os = "macos"))]
+fn has_irregular_case(word: &str) -> bool {
+    word.chars().skip(1).any(|c| c.is_uppercase())
+}
+
+#[cfg(not(target_os = "macos"))]
 fn is_apostrophe(c: char) -> bool {
     c == '\'' || c == '\u{2019}'
 }
 
+#[cfg(not(target_os = "macos"))]
 fn collect_spelling(
     speller: &spellbook::Dictionary,
     custom: &HashSet<String>,
@@ -128,11 +144,15 @@ fn collect_spelling(
         }
         let end = i;
         let word: String = chars[start..end].iter().collect();
-        if speller.check(&word) || custom.contains(&word) {
+        if has_irregular_case(&word) || speller.check(&word) || custom.contains(&word.to_lowercase()) {
             continue;
         }
         let mut suggestions = Vec::new();
         speller.suggest(&word, &mut suggestions);
+        let lower = word.to_lowercase();
+        if suggestions.iter().any(|s| s.to_lowercase() == lower) {
+            continue;
+        }
         suggestions.truncate(5);
         issues.push(Issue {
             start,
@@ -184,10 +204,13 @@ pub async fn proof_text(
         let state = app.state::<ProofState>();
         let mut guard = state.lock().map_err(|e| e.to_string())?;
         if guard.is_none() {
+            let mut custom = load_custom(&app);
+            load_tech(&app, &mut custom);
             *guard = Some(Engine {
+                #[cfg(not(target_os = "macos"))]
                 speller: None,
                 harper: None,
-                custom: load_custom(&app),
+                custom,
             });
         }
         let engine = guard.as_mut().unwrap();
@@ -195,10 +218,24 @@ pub async fn proof_text(
         let chars: Vec<char> = text.chars().collect();
         let mut issues = Vec::new();
         if spelling {
-            if engine.speller.is_none() {
-                engine.speller = Some(build_speller(&app)?);
+            #[cfg(target_os = "macos")]
+            for mi in crate::macspell::check(&text, &engine.custom) {
+                issues.push(Issue {
+                    start: mi.start,
+                    end: mi.end,
+                    kind: "spelling".into(),
+                    category: "Spelling".into(),
+                    message: format!("“{}” may be misspelled", mi.word),
+                    suggestions: mi.suggestions,
+                });
+            }
+            #[cfg(not(target_os = "macos"))]
+            {
+                if engine.speller.is_none() {
+                    engine.speller = Some(build_speller(&app)?);
+                }
+                collect_spelling(engine.speller.as_ref().unwrap(), &engine.custom, &chars, &mut issues);
             }
-            collect_spelling(engine.speller.as_ref().unwrap(), &engine.custom, &chars, &mut issues);
         }
         if grammar {
             if engine.harper.is_none() {
@@ -232,7 +269,7 @@ pub fn remember_word(
 
     let mut guard = state.inner().lock().map_err(|e| e.to_string())?;
     if let Some(engine) = guard.as_mut() {
-        engine.custom.insert(word);
+        engine.custom.insert(word.to_lowercase());
     }
     Ok(())
 }

src-tauri/tauri.conf.json

@@ -1,7 +1,7 @@
 {
   "$schema": "https://schema.tauri.app/config/2",
-  "productName": "margin",
-  "version": "0.1.3",
+  "productName": "Margin",
+  "version": "0.1.15",
   "identifier": "studio.margin.app",
   "build": {
     "beforeDevCommand": "pnpm dev",

src/App.tsx

@@ -1,9 +1,15 @@
 import { useEffect } from "react";
 import { listen } from "@tauri-apps/api/event";
+import { openUrl } from "@tauri-apps/plugin-opener";
 import { getCurrentWindow } from "@tauri-apps/api/window";
 import { Library } from "./components/Library";
 import { EditorView } from "./components/EditorView";
+import { BackupSettings } from "./components/BackupSettings";
+import { ExportPreview } from "./components/ExportPreview";
+import { UpdateDialog } from "./components/UpdateDialog";
 import { useBook } from "./store/useBook";
+import { useBackup } from "./store/useBackup";
+import { useExportPreview } from "./store/useExportPreview";
 import { isDesktop } from "./ipc";
 import { createAndOpenBook, saveBook } from "./library";
 import { runExport } from "./export/run";
@@ -19,9 +25,13 @@ function App() {
     const unlisten = listen<string>("menu-action", (event) => {
       const state = useBook.getState();
       if (event.payload === "new-book") createAndOpenBook(state.openBook, state.setNotice);
-      else if (event.payload === "export-pdf") runExport("pdf");
+      else if (event.payload === "export-pdf") {
+        if (useBook.getState().book) useExportPreview.getState().openPreview();
+      }
       else if (event.payload === "export-epub") runExport("epub");
       else if (event.payload === "check-updates") checkForUpdates(false);
+      else if (event.payload === "report-issue")
+        openUrl("https://github.com/priyanshujain/margin/issues").catch(() => {});
     });
     const unlistenWarn = listen<string>("pdf-warnings", (event) => {
       useBook.getState().setNotice(`PDF exported with warnings:\n${event.payload}`);
@@ -37,9 +47,16 @@ function App() {
     const win = getCurrentWindow();
     const unlisten = win.onCloseRequested(async (event) => {
       const { book, dirty } = useBook.getState();
-      if (!book || !dirty) return;
+      const { connected } = useBackup.getState();
+      if ((!book || !dirty) && !connected) return;
       event.preventDefault();
-      await saveBook(book).catch(() => {});
+      if (book && dirty) await saveBook(book).catch(() => {});
+      if (connected) {
+        await Promise.race([
+          useBackup.getState().backup(true),
+          new Promise((resolve) => setTimeout(resolve, 8000)),
+        ]);
+      }
       win.destroy();
     });
     return () => {
@@ -47,7 +64,36 @@ function App() {
     };
   }, []);
 
-  return book ? <EditorView /> : <Library onOpen={openBook} />;
+  useEffect(() => {
+    if (!isDesktop) return;
+    const unlisten = listen<{ ok: boolean; error: string | null }>("gdrive-auth", (event) => {
+      useBackup.getState().handleAuthEvent(event.payload.ok, event.payload.error);
+    });
+    return () => {
+      unlisten.then((stop) => stop());
+    };
+  }, []);
+
+  useEffect(() => {
+    if (!isDesktop) return;
+    const tick = async () => {
+      await useBackup.getState().refresh();
+      const state = useBackup.getState();
+      if (state.connected && state.pending) state.backup(true);
+    };
+    tick();
+    const id = setInterval(tick, 15 * 60 * 1000);
+    return () => clearInterval(id);
+  }, []);
+
+  return (
+    <>
+      {book ? <EditorView /> : <Library onOpen={openBook} />}
+      {isDesktop && <BackupSettings />}
+      {isDesktop && <ExportPreview />}
+      {isDesktop && <UpdateDialog />}
+    </>
+  );
 }
 
 export default App;

src/backup.ts

@@ -0,0 +1,63 @@
+import { invoke } from "@tauri-apps/api/core";
+import { isDesktop } from "./ipc";
+
+export interface BackupStatus {
+  connected: boolean;
+  email: string | null;
+  lastBackup: number | null;
+  pending: boolean;
+}
+
+export interface RestoreResult {
+  restored: number;
+}
+
+export interface BackupOutcome extends BackupStatus {
+  uploaded: number;
+}
+
+export interface RemoteBackup {
+  name: string;
+}
+
+const OFFLINE: BackupStatus = { connected: false, email: null, lastBackup: null, pending: false };
+
+export async function gdriveStatus(): Promise<BackupStatus> {
+  if (!isDesktop) return OFFLINE;
+  return invoke<BackupStatus>("gdrive_status");
+}
+
+export async function gdriveConnect(): Promise<string> {
+  return invoke<string>("gdrive_connect");
+}
+
+export async function gdriveDisconnect(): Promise<BackupStatus> {
+  return invoke<BackupStatus>("gdrive_disconnect");
+}
+
+export async function gdriveBackup(): Promise<BackupOutcome> {
+  return invoke<BackupOutcome>("gdrive_backup");
+}
+
+export async function gdriveRestore(): Promise<RestoreResult> {
+  return invoke<RestoreResult>("gdrive_restore");
+}
+
+export async function gdriveListBackups(): Promise<RemoteBackup[]> {
+  if (!isDesktop) return [];
+  return invoke<RemoteBackup[]>("gdrive_list_backups");
+}
+
+export function formatBackupTime(ts: number | null): string {
+  if (!ts) return "Not backed up yet";
+  const diff = Date.now() - ts * 1000;
+  const min = Math.floor(diff / 60000);
+  if (min < 1) return "Backed up just now";
+  if (min < 60) return `Backed up ${min}m ago`;
+  const hr = Math.floor(min / 60);
+  if (hr < 24) return `Backed up ${hr}h ago`;
+  const day = Math.floor(hr / 24);
+  if (day === 1) return "Backed up yesterday";
+  if (day < 7) return `Backed up ${day}d ago`;
+  return `Backed up ${new Date(ts * 1000).toLocaleDateString()}`;
+}

src/book-style.ts

@@ -0,0 +1,13 @@
+import { type BookFonts, fontStack } from "./model/fonts";
+
+export function applyBookFonts(fonts: BookFonts): void {
+  const root = document.documentElement;
+  root.style.setProperty("--font-book", fontStack(fonts.body));
+  root.style.setProperty("--font-heading", fontStack(fonts.heading));
+}
+
+export function resetBookFonts(): void {
+  const root = document.documentElement;
+  root.style.removeProperty("--font-book");
+  root.style.removeProperty("--font-heading");
+}

src/components/AddPageMenu.tsx

@@ -4,6 +4,7 @@ import { Icon } from "./Icon";
 
 interface AddPageMenuProps {
   onAdd: (group: "front" | "back", title: string) => void;
+  onAddPart: () => void;
 }
 
 const GROUPS: { key: "front" | "back"; label: string }[] = [
@@ -11,10 +12,11 @@ const GROUPS: { key: "front" | "back"; label: string }[] = [
   { key: "back", label: "Back matter" },
 ];
 
-export function AddPageMenu({ onAdd }: AddPageMenuProps) {
+export function AddPageMenu({ onAdd, onAddPart }: AddPageMenuProps) {
   const [open, setOpen] = useState(false);
   const [coords, setCoords] = useState({ top: 0, left: 0 });
   const btnRef = useRef<HTMLButtonElement>(null);
+  const popRef = useRef<HTMLDivElement>(null);
 
   const toggle = () => {
     if (!open && btnRef.current) {
@@ -37,11 +39,35 @@ export function AddPageMenu({ onAdd }: AddPageMenuProps) {
     };
   }, [open]);
 
+  useEffect(() => {
+    if (!open) return;
+    popRef.current?.querySelector<HTMLElement>(".add-page-item")?.focus();
+  }, [open]);
+
+  const onMenuKeyDown = (e: React.KeyboardEvent) => {
+    if (e.key === "Escape") {
+      e.preventDefault();
+      setOpen(false);
+      btnRef.current?.focus();
+    } else if (e.key === "ArrowDown" || e.key === "ArrowUp") {
+      e.preventDefault();
+      const items = Array.from(popRef.current?.querySelectorAll<HTMLElement>(".add-page-item") ?? []);
+      const idx = items.indexOf(document.activeElement as HTMLElement);
+      const nextIdx = e.key === "ArrowDown" ? (idx + 1) % items.length : (idx - 1 + items.length) % items.length;
+      items[nextIdx]?.focus();
+    }
+  };
+
   const pick = (group: "front" | "back", label: string) => {
     setOpen(false);
     onAdd(group, label);
   };
 
+  const pickPart = () => {
+    setOpen(false);
+    onAddPart();
+  };
+
   return (
     <>
       <button ref={btnRef} className="add-page" data-open={open} onClick={toggle}>
@@ -50,10 +76,18 @@ export function AddPageMenu({ onAdd }: AddPageMenuProps) {
       </button>
       {open && (
         <div
+          ref={popRef}
           className="add-page-pop"
           style={{ top: coords.top, left: coords.left }}
           onMouseDown={(e) => e.stopPropagation()}
+          onKeyDown={onMenuKeyDown}
         >
+          <div className="add-page-group">
+            <div className="add-page-label">Body</div>
+            <button className="add-page-item" onClick={pickPart}>
+              Part divider
+            </button>
+          </div>
           {GROUPS.map((g) => (
             <div key={g.key} className="add-page-group">
               <div className="add-page-label">{g.label}</div>

src/components/BackupButton.tsx

@@ -0,0 +1,48 @@
+import { Icon } from "./Icon";
+import { useBackup } from "../store/useBackup";
+import { formatBackupTime } from "../backup";
+
+export function BackupButton() {
+  const connected = useBackup((s) => s.connected);
+  const pending = useBackup((s) => s.pending);
+  const phase = useBackup((s) => s.phase);
+  const lastBackup = useBackup((s) => s.lastBackup);
+  const openSettings = useBackup((s) => s.openSettings);
+
+  const busy = phase === "working" || phase === "connecting";
+  const error = phase === "error";
+
+  const state = busy ? "working" : error ? "error" : !connected ? "off" : pending ? "pending" : "synced";
+
+  const title =
+    phase === "connecting"
+      ? "Waiting for Google authorization…"
+      : state === "working"
+        ? "Backing up…"
+        : state === "error"
+          ? "Backup needs attention"
+          : state === "off"
+            ? "Connect Google Drive"
+            : state === "pending"
+              ? "Changes not backed up"
+              : formatBackupTime(lastBackup);
+
+  const onClick = () => {
+    openSettings();
+  };
+
+  return (
+    <button className="icon-btn backup-btn" data-state={state} onClick={onClick} title={title}>
+      {busy ? (
+        <Icon size={18}>
+          <path d="M21 12a9 9 0 1 1-2.6-6.4M21 4v5h-5" />
+        </Icon>
+      ) : (
+        <Icon size={18}>
+          <path d="M7 18a4 4 0 0 1 0-8 5 5 0 0 1 9.6-1.3A3.5 3.5 0 0 1 18 18H7z" />
+          {connected ? <path d="M12 16.5v-5M9.7 12.8l2.3-2.3 2.3 2.3" /> : null}
+        </Icon>
+      )}
+    </button>
+  );
+}

src/components/BackupSettings.tsx

@@ -0,0 +1,146 @@
+import { useEffect, useState } from "react";
+import { Icon } from "./Icon";
+import { ConfirmDialog } from "./ConfirmDialog";
+import { useBackup } from "../store/useBackup";
+import { formatBackupTime, gdriveListBackups } from "../backup";
+
+export function BackupSettings() {
+  const open = useBackup((s) => s.settingsOpen);
+  const close = useBackup((s) => s.closeSettings);
+  const connected = useBackup((s) => s.connected);
+  const email = useBackup((s) => s.email);
+  const lastBackup = useBackup((s) => s.lastBackup);
+  const pending = useBackup((s) => s.pending);
+  const phase = useBackup((s) => s.phase);
+  const connect = useBackup((s) => s.connect);
+  const disconnect = useBackup((s) => s.disconnect);
+  const backup = useBackup((s) => s.backup);
+  const restore = useBackup((s) => s.restore);
+  const cancelConnect = useBackup((s) => s.cancelConnect);
+  const openAuthUrl = useBackup((s) => s.openAuthUrl);
+  const copyAuthUrl = useBackup((s) => s.copyAuthUrl);
+
+  const [remoteCount, setRemoteCount] = useState<number | null>(null);
+  const [confirmRestore, setConfirmRestore] = useState(false);
+  const working = phase === "working";
+
+  useEffect(() => {
+    if (!open || !connected) {
+      setRemoteCount(null);
+      return;
+    }
+    let active = true;
+    gdriveListBackups()
+      .then((list) => active && setRemoteCount(list.length))
+      .catch(() => active && setRemoteCount(null));
+    return () => {
+      active = false;
+    };
+  }, [open, connected, lastBackup]);
+
+  if (!open) return null;
+
+  return (
+    <>
+      <div className="overlay" onClick={close}>
+        <div className="panel" onClick={(e) => e.stopPropagation()}>
+          <div className="panel-head">
+            <h2>Backup &amp; Sync</h2>
+            <button className="icon-btn" onClick={close} title="Close">
+              <Icon d="M6 6l12 12M18 6L6 18" />
+            </button>
+          </div>
+          <div className="panel-body">
+            {phase === "connecting" ? (
+              <div className="backup-connecting">
+                <div className="backup-waiting">
+                  <Icon size={16}>
+                    <path d="M21 12a9 9 0 1 1-2.6-6.4M21 4v5h-5" />
+                  </Icon>
+                  <span>Waiting for Google authorization…</span>
+                </div>
+                <p>Finish in the browser tab that opened. If it didn't open, reopen the link or copy it into a browser.</p>
+                <div className="backup-link-row">
+                  <button className="backup-text-btn" onClick={cancelConnect}>
+                    Stop linking
+                  </button>
+                  <div className="backup-links">
+                    <button className="backup-text-btn" onClick={openAuthUrl}>
+                      Open link again
+                    </button>
+                    <span className="backup-link-sep">·</span>
+                    <button className="backup-text-btn" onClick={copyAuthUrl}>
+                      Copy link
+                    </button>
+                  </div>
+                </div>
+              </div>
+            ) : !connected ? (
+              <div className="backup-intro">
+                <p>
+                  Connect Google Drive to keep a private backup of every book. margin only ever sees the files it
+                  creates in a <strong>margin</strong> folder, never the rest of your Drive.
+                </p>
+                <button className="btn-primary" disabled={working} onClick={connect}>
+                  {working ? "Connecting…" : "Connect Google Drive"}
+                </button>
+              </div>
+            ) : (
+              <>
+                <div className="backup-account">
+                  <div className="backup-account-info">
+                    <span className="field-label">Connected account</span>
+                    <span className="backup-email">{email || "Google Drive"}</span>
+                  </div>
+                  <button className="btn-ghost" disabled={working} onClick={disconnect}>
+                    Disconnect
+                  </button>
+                </div>
+
+                <div className="backup-status-row">
+                  <span className={`backup-dot ${pending ? "is-pending" : "is-synced"}`} />
+                  <span>{pending ? "Changes not backed up" : formatBackupTime(lastBackup)}</span>
+                </div>
+
+                <div className="backup-actions">
+                  <button className="btn-primary" disabled={working} onClick={() => backup()}>
+                    {working ? "Working…" : "Back up now"}
+                  </button>
+                  <button
+                    className="btn-ghost"
+                    disabled={working || remoteCount === 0}
+                    onClick={() => setConfirmRestore(true)}
+                  >
+                    {remoteCount === null ? "Restore from Drive" : `Restore ${remoteCount} book${remoteCount === 1 ? "" : "s"}`}
+                  </button>
+                </div>
+
+                <p className="backup-note">
+                  Backs up automatically when you close margin, and every 15 minutes while there are changes.
+                </p>
+              </>
+            )}
+          </div>
+        </div>
+      </div>
+
+      {confirmRestore && (
+        <ConfirmDialog
+          title="Restore from Google Drive"
+          message={
+            <>
+              This replaces your local books with the copies in Google Drive. Any local changes that haven't been backed
+              up will be lost.
+            </>
+          }
+          confirmLabel="Restore"
+          onConfirm={() => {
+            setConfirmRestore(false);
+            restore();
+          }}
+          onClose={() => setConfirmRestore(false)}
+        />
+      )}
+    </>
+  );
+}

src/components/ConfirmDialog.tsx

@@ -1,4 +1,4 @@
-import type { ReactNode } from "react";
+import { useEffect, useRef, type ReactNode } from "react";
 import { Icon } from "./Icon";
 
 interface ConfirmDialogProps {
@@ -10,6 +10,21 @@ interface ConfirmDialogProps {
 }
 
 export function ConfirmDialog({ title, message, confirmLabel = "Delete", onConfirm, onClose }: ConfirmDialogProps) {
+  const confirmRef = useRef<HTMLButtonElement>(null);
+
+  useEffect(() => {
+    confirmRef.current?.focus();
+    const onKey = (e: KeyboardEvent) => {
+      if (e.key === "Escape") {
+        e.preventDefault();
+        onClose();
+      }
+    };
+    window.addEventListener("keydown", onKey);
+    return () => window.removeEventListener("keydown", onKey);
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, []);
+
   return (
     <div className="overlay" onClick={onClose}>
       <div className="panel panel-confirm" onClick={(e) => e.stopPropagation()}>
@@ -26,7 +41,7 @@ export function ConfirmDialog({ title, message, confirmLabel = "Delete", onConfi
           <button className="btn-ghost" onClick={onClose}>
             Cancel
           </button>
-          <button className="btn-danger" onClick={onConfirm}>
+          <button ref={confirmRef} className="btn-danger" onClick={onConfirm}>
             {confirmLabel}
           </button>
         </div>

src/components/Dock.tsx

@@ -1,7 +1,7 @@
 import { type ReactNode, useEffect, useMemo, useRef, useState } from "react";
 import { generateHTML } from "@tiptap/core";
 import { COVER_ID, useBook } from "../store/useBook";
-import { type Chapter, type TrimSize, bodyNumber, chapterKind } from "../model/book";
+import { type Chapter, type TrimSize, bodyNumber, chapterKind, partNumber, partRoman } from "../model/book";
 import { editorExtensions } from "../editor/extensions";
 import { chapterToPdfInputs, coverToPdfInputs } from "../export/typst";
 import { compilePdf, isDesktop } from "../ipc";
@@ -71,7 +71,15 @@ function DockHead({ meta }: { meta?: ReactNode }) {
 
 function chapterEyebrow(chapter: Chapter, chapters: Chapter[], idx: number): string {
   const kind = chapterKind(chapter);
-  return kind === "body" ? `Chapter ${bodyNumber(chapters, idx) ?? ""}` : kind === "front" ? "Front matter" : "Back matter";
+  if (kind === "body") return `Chapter ${bodyNumber(chapters, idx) ?? ""}`;
+  if (kind === "part") return `Part ${partRoman(partNumber(chapters, idx) ?? 0)}`;
+  return kind === "front" ? "Front matter" : "Back matter";
+}
+
+function previewTitle(chapter: Chapter): string | undefined {
+  if (chapter.noTitle) return undefined;
+  if (chapterKind(chapter) === "part") return chapter.title || undefined;
+  return chapter.title || "Untitled";
 }
 
 function useActiveChapter() {
@@ -107,8 +115,8 @@ function PdfDock() {
     clearTimeout(timer.current);
     setBusy(true);
     timer.current = setTimeout(() => {
-      const { source, images } = coverActive ? coverToPdfInputs(book) : chapterToPdfInputs(book, idx);
-      compilePdf(source, images)
+      const { source, images, fonts } = coverActive ? coverToPdfInputs(book) : chapterToPdfInputs(book, idx);
+      compilePdf(source, images, false, fonts)
         .then((bytes) => {
           setPdf(bytes);
           setError(null);
@@ -163,7 +171,7 @@ function HtmlDock() {
       <div className="page">
         <div className="p-opener">
           <div className="p-num">{eyebrow}</div>
-          {!chapter.noTitle && <div className="p-title">{chapter.title || "Untitled"}</div>}
+          {previewTitle(chapter) !== undefined && <div className="p-title">{previewTitle(chapter)}</div>}
         </div>
         <div className="page-body" dangerouslySetInnerHTML={{ __html: html }} />
         <div className="folio">{idx * 8 + 7}</div>
@@ -207,7 +215,7 @@ function DeviceDock({ device }: { device: Device }) {
       <DeviceFrame
         device={device}
         eyebrow={eyebrow}
-        title={chapter.noTitle ? undefined : chapter.title || "Untitled"}
+        title={previewTitle(chapter)}
         html={html}
       />
     </section>

src/components/EditorView.tsx

@@ -1,10 +1,12 @@
-import { useCallback, useEffect, useState } from "react";
+import { useCallback, useEffect, useLayoutEffect, useRef, useState } from "react";
+import { listen } from "@tauri-apps/api/event";
 import type { Editor as TiptapEditor } from "@tiptap/react";
 import { Sidebar } from "./Sidebar";
 import { Dock } from "./Dock";
 import { ResizeHandle } from "./ResizeHandle";
 import { Icon } from "./Icon";
 import { Settings } from "./Settings";
+import { BackupButton } from "./BackupButton";
 import { CoverView } from "./CoverView";
 import { FindBar } from "./FindBar";
 import { ProofPopover } from "./ProofPopover";
@@ -12,13 +14,16 @@ import { Editor } from "../editor/Editor";
 import { FloatingToolbar } from "../editor/FloatingToolbar";
 import type { ProofCoords, ProofIssue, ProofingStorage } from "../editor/proofing";
 import { COVER_ID, useBook } from "../store/useBook";
+import { useBackup } from "../store/useBackup";
+import { useExportPreview } from "../store/useExportPreview";
 import { useProofing } from "../store/useProofing";
 import { useTheme } from "../store/useTheme";
 import { useWidth } from "../store/useWidth";
 import { WIDTH_OPTIONS } from "../width";
-import { bodyNumber, chapterKind } from "../model/book";
+import { bodyNumber, chapterKind, partNumber, partRoman } from "../model/book";
 import { saveBook } from "../library";
 import { isDesktop } from "../ipc";
+import { useCompact } from "../useMedia";
 import { issueSignature, rememberWord, runProof } from "../proofing";
 import { runExport } from "../export/run";
 
@@ -38,10 +43,16 @@ export function EditorView() {
   const width = useWidth((s) => s.width);
   const setWidth = useWidth((s) => s.setWidth);
 
+  const isCompact = useCompact();
   const [editor, setEditor] = useState<TiptapEditor | null>(null);
-  const [dock, setDock] = useState(true);
+  const editorRef = useRef<TiptapEditor | null>(null);
+  editorRef.current = editor;
+  const lastChapterRef = useRef<string>("");
+  const [sidebarOpen, setSidebarOpen] = useState(!isCompact);
+  const [dock, setDock] = useState(!isCompact);
   const [settingsOpen, setSettingsOpen] = useState(false);
   const [exportOpen, setExportOpen] = useState(false);
+  const [moreOpen, setMoreOpen] = useState(false);
   const [widthOpen, setWidthOpen] = useState(false);
   const [findOpen, setFindOpen] = useState(false);
   const [findExpanded, setFindExpanded] = useState(false);
@@ -56,11 +67,38 @@ export function EditorView() {
   const coverActive = activeChapterId === COVER_ID;
   const proofingAvailable = isDesktop && book?.metadata.language === "en";
 
+  const toggleSidebar = () =>
+    setSidebarOpen((open) => {
+      if (!open && isCompact) setDock(false);
+      return !open;
+    });
+  const toggleDock = () =>
+    setDock((open) => {
+      if (!open && isCompact) setSidebarOpen(false);
+      return !open;
+    });
+  const closeDrawers = () => {
+    setSidebarOpen(false);
+    setDock(false);
+  };
+
   const openFind = useCallback((expanded: boolean) => {
     setFindExpanded(expanded);
     setFindOpen(true);
   }, []);
 
+  const focusEditorSoon = useCallback(() => {
+    requestAnimationFrame(() => editorRef.current?.commands.focus(undefined, { scrollIntoView: false }));
+  }, []);
+
+  const switchChapter = useCallback(
+    (dir: 1 | -1) => {
+      useBook.getState().goToAdjacentChapter(dir);
+      focusEditorSoon();
+    },
+    [focusEditorSoon]
+  );
+
   const reproof = useCallback(() => {
     if (!editor) return;
     const state = useProofing.getState();
@@ -79,6 +117,7 @@ export function EditorView() {
     saveBook(current)
       .then(() => {
         if (useBook.getState().book === current) markSaved();
+        useBackup.getState().refresh();
       })
       .catch((e) => setNotice(`Save failed: ${e}`));
   }, [markSaved, setNotice]);
@@ -91,17 +130,58 @@ export function EditorView() {
 
   useEffect(() => {
     const onKey = (e: KeyboardEvent) => {
-      if ((e.metaKey || e.ctrlKey) && e.key.toLowerCase() === "s") {
+      if (e.metaKey && e.altKey && e.key.toLowerCase() === "f") {
         e.preventDefault();
-        saveNow();
-      } else if ((e.metaKey || e.ctrlKey) && e.key.toLowerCase() === "f") {
+        openFind(true);
+      } else if (e.metaKey && e.altKey && e.key === "ArrowRight") {
         e.preventDefault();
-        openFind(e.altKey);
+        e.stopPropagation();
+        switchChapter(1);
+      } else if (e.metaKey && e.altKey && e.key === "ArrowLeft") {
+        e.preventDefault();
+        e.stopPropagation();
+        switchChapter(-1);
+      } else if (e.ctrlKey && !e.metaKey && e.key === "Tab") {
+        e.preventDefault();
+        e.stopPropagation();
+        switchChapter(e.shiftKey ? -1 : 1);
+      }
+    };
+    window.addEventListener("keydown", onKey, true);
+    return () => window.removeEventListener("keydown", onKey, true);
+  }, [openFind, switchChapter]);
+
+  const menuCommands = useRef({ saveNow, openFind, setSettingsOpen, toggleSidebar, switchChapter });
+  menuCommands.current = { saveNow, openFind, setSettingsOpen, toggleSidebar, switchChapter };
+
+  useEffect(() => {
+    if (!isDesktop) return;
+    const unlisten = listen<string>("menu-action", (e) => {
+      const cmd = menuCommands.current;
+      if (e.payload === "save") cmd.saveNow();
+      else if (e.payload === "find") cmd.openFind(false);
+      else if (e.payload === "settings") cmd.setSettingsOpen(true);
+      else if (e.payload === "toggle-chapters") cmd.toggleSidebar();
+      else if (e.payload === "next-chapter") cmd.switchChapter(1);
+      else if (e.payload === "prev-chapter") cmd.switchChapter(-1);
+    });
+    return () => {
+      unlisten.then((stop) => stop());
+    };
+  }, []);
+
+  useEffect(() => {
+    if (!widthOpen && !exportOpen && !moreOpen) return;
+    const onKey = (e: KeyboardEvent) => {
+      if (e.key === "Escape") {
+        setWidthOpen(false);
+        setExportOpen(false);
+        setMoreOpen(false);
       }
     };
     window.addEventListener("keydown", onKey);
     return () => window.removeEventListener("keydown", onKey);
-  }, [saveNow, openFind]);
+  }, [widthOpen, exportOpen, moreOpen]);
 
   useEffect(() => {
     if (!notice) return;
@@ -109,6 +189,11 @@ export function EditorView() {
     return () => clearTimeout(timer);
   }, [notice]);
 
+  useEffect(() => {
+    setSidebarOpen(!isCompact);
+    setDock(!isCompact);
+  }, [isCompact]);
+
   useEffect(() => {
     if (!editor) return;
     const storage = (editor.storage as unknown as Record<string, ProofingStorage>).proofing;
@@ -144,29 +229,45 @@ export function EditorView() {
 
   const handleExport = (format: "pdf" | "epub") => {
     setExportOpen(false);
-    runExport(format);
+    if (format === "pdf" && isDesktop) useExportPreview.getState().openPreview();
+    else runExport(format);
   };
 
   if (!book) return null;
-  const idx = book.chapters.findIndex((c) => c.id === activeChapterId);
-  const chapter = book.chapters[idx] ?? book.chapters[0];
+  const activeIdx = book.chapters.findIndex((c) => c.id === activeChapterId);
+  const activeChapter = book.chapters[activeIdx];
+  if (activeChapter) lastChapterRef.current = activeChapter.id;
+  const editorIdx = activeChapter ? activeIdx : book.chapters.findIndex((c) => c.id === lastChapterRef.current);
+  const chapter = book.chapters[editorIdx] ?? book.chapters[0];
   const realIdx = book.chapters.findIndex((c) => c.id === chapter?.id);
   const kind = chapter ? chapterKind(chapter) : "body";
   const eyebrow =
-    kind === "body" ? `Chapter ${bodyNumber(book.chapters, realIdx) ?? ""}` : kind === "front" ? "Front matter" : "Back matter";
+    kind === "body"
+      ? `Chapter ${bodyNumber(book.chapters, realIdx) ?? ""}`
+      : kind === "part"
+        ? `Part ${partRoman(partNumber(book.chapters, realIdx) ?? 0)}`
+        : kind === "front"
+          ? "Front matter"
+          : "Back matter";
 
   return (
-    <div className="app">
+    <div className="app" data-compact={isCompact} data-sidebar={sidebarOpen} data-dock={dock}>
       <header className="titlebar" data-tauri-drag-region>
+        <div className="lead">
+          <button className="icon-btn" data-on={sidebarOpen} onClick={toggleSidebar} title="Toggle chapters" aria-label="Toggle chapters">
+            <Icon d="M3 4.5h18v15H3zM9 4.5v15" />
+          </button>
+        </div>
         <button className="doc-title" onClick={() => setSettingsOpen(true)} title="Book setup">
           {book.metadata.title || "Untitled"}
           {dirty && <span className="dirty-dot" />}
         </button>
         <div className="actions">
+          {isDesktop && !isCompact && <BackupButton />}
           <button className="icon-btn" data-on={findOpen} onClick={() => (findOpen ? setFindOpen(false) : openFind(false))} title="Find (⌘F)">
             <Icon d="M11 4a7 7 0 1 0 0 14 7 7 0 0 0 0-14zM20 20l-4-4" />
           </button>
-          {proofingAvailable && !coverActive && (
+          {!isCompact && proofingAvailable && !coverActive && (
             <>
               <button className="icon-btn" data-on={spelling} onClick={toggleSpelling} title="Check spelling">
                 <Icon d="M4 17l4-10 4 10M5.4 13.4h5.2M15 17l2.5 2.5L22 14" />
@@ -176,57 +277,120 @@ export function EditorView() {
               </button>
             </>
           )}
-          <div className="menu-wrap">
-            <button className="icon-btn" data-on={widthOpen} onClick={() => setWidthOpen((v) => !v)} title="Editor width">
-              <Icon d="M3 5v14M21 5v14M7 12h10M7 12l3-3M7 12l3 3M17 12l-3-3M17 12l-3 3" />
+          {!isCompact && (
+            <div className="menu-wrap">
+              <button className="icon-btn" data-on={widthOpen} onClick={() => setWidthOpen((v) => !v)} title="Editor width">
+                <Icon d="M3 5v14M21 5v14M7 12h10M7 12l3-3M7 12l3 3M17 12l-3-3M17 12l-3 3" />
+              </button>
+              {widthOpen && (
+                <>
+                  <div className="menu-backdrop" onClick={() => setWidthOpen(false)} />
+                  <div className="menu">
+                    {WIDTH_OPTIONS.map((w) => (
+                      <button
+                        key={w.id}
+                        data-on={width === w.id}
+                        onClick={() => {
+                          setWidth(w.id);
+                          setWidthOpen(false);
+                        }}
+                      >
+                        {w.label}
+                      </button>
+                    ))}
+                  </div>
+                </>
+              )}
+            </div>
+          )}
+          {!isCompact && (
+            <div className="menu-wrap">
+              <button className="icon-btn" data-on={exportOpen} onClick={() => setExportOpen((v) => !v)} title="Export">
+                <Icon d="M5 13v6h14v-6M12 16V3M8 7l4-4 4 4" />
+              </button>
+              {exportOpen && (
+                <>
+                  <div className="menu-backdrop" onClick={() => setExportOpen(false)} />
+                  <div className="menu">
+                    <button onClick={() => handleExport("pdf")}>Export PDF…</button>
+                    <button onClick={() => handleExport("epub")}>Export EPUB…</button>
+                  </div>
+                </>
+              )}
+            </div>
+          )}
+          {!isCompact && (
+            <button className="icon-btn" onClick={toggleTheme} title={theme === "dark" ? "Light mode" : "Dark mode"}>
+              {theme === "dark" ? (
+                <Icon>
+                  <circle cx="12" cy="12" r="4" />
+                  <path d="M12 2v2M12 20v2M2 12h2M20 12h2M4.9 4.9l1.4 1.4M17.7 17.7l1.4 1.4M19.1 4.9l-1.4 1.4M6.3 17.7l-1.4 1.4" />
+                </Icon>
+              ) : (
+                <Icon d="M21 12.8A9 9 0 1 1 11.2 3a7 7 0 0 0 9.8 9.8z" />
+              )}
             </button>
-            {widthOpen && (
-              <>
-                <div className="menu-backdrop" onClick={() => setWidthOpen(false)} />
-                <div className="menu">
-                  {WIDTH_OPTIONS.map((w) => (
-                    <button
-                      key={w.id}
-                      data-on={width === w.id}
-                      onClick={() => {
-                        setWidth(w.id);
-                        setWidthOpen(false);
-                      }}
-                    >
-                      {w.label}
-                    </button>
-                  ))}
-                </div>
-              </>
-            )}
-          </div>
-          <div className="menu-wrap">
-            <button className="icon-btn" data-on={exportOpen} onClick={() => setExportOpen((v) => !v)} title="Export">
-              <Icon d="M5 13v6h14v-6M12 16V3M8 7l4-4 4 4" />
-            </button>
-            {exportOpen && (
-              <>
-                <div className="menu-backdrop" onClick={() => setExportOpen(false)} />
-                <div className="menu">
-                  <button onClick={() => handleExport("pdf")}>Export PDF…</button>
-                  <button onClick={() => handleExport("epub")}>Export EPUB…</button>
-                </div>
-              </>
-            )}
-          </div>
-          <button className="icon-btn" onClick={toggleTheme} title={theme === "dark" ? "Light mode" : "Dark mode"}>
-            {theme === "dark" ? (
-              <Icon>
-                <circle cx="12" cy="12" r="4" />
-                <path d="M12 2v2M12 20v2M2 12h2M20 12h2M4.9 4.9l1.4 1.4M17.7 17.7l1.4 1.4M19.1 4.9l-1.4 1.4M6.3 17.7l-1.4 1.4" />
-              </Icon>
-            ) : (
-              <Icon d="M21 12.8A9 9 0 1 1 11.2 3a7 7 0 0 0 9.8 9.8z" />
-            )}
-          </button>
-          <button className="icon-btn" data-on={dock} onClick={() => setDock(!dock)} title="Toggle preview">
+          )}
+          <button className="icon-btn" data-on={dock} onClick={toggleDock} title="Toggle preview">
             <Icon d="M3 4.5h18v15H3zM14 4.5v15" />
           </button>
+          {isCompact && (
+            <div className="menu-wrap">
+              <button className="icon-btn" data-on={moreOpen} onClick={() => setMoreOpen((v) => !v)} title="More" aria-label="More options">
+                <Icon d="M5 12h.01M12 12h.01M19 12h.01" />
+              </button>
+              {moreOpen && (
+                <>
+                  <div className="menu-backdrop" onClick={() => setMoreOpen(false)} />
+                  <div className="menu">
+                    <div className="menu-label">Editor width</div>
+                    {WIDTH_OPTIONS.map((w) => (
+                      <button
+                        key={w.id}
+                        data-on={width === w.id}
+                        onClick={() => {
+                          setWidth(w.id);
+                          setMoreOpen(false);
+                        }}
+                      >
+                        {w.label}
+                      </button>
+                    ))}
+                    <div className="menu-sep" />
+                    <button
+                      onClick={() => {
+                        setMoreOpen(false);
+                        handleExport("pdf");
+                      }}
+                    >
+                      Export PDF…
+                    </button>
+                    <button
+                      onClick={() => {
+                        setMoreOpen(false);
+                        handleExport("epub");
+                      }}
+                    >
+                      Export EPUB…
+                    </button>
+                    {proofingAvailable && !coverActive && (
+                      <>
+                        <div className="menu-sep" />
+                        <button data-on={spelling} onClick={toggleSpelling}>
+                          Check spelling
+                        </button>
+                        <button data-on={grammar} onClick={toggleGrammar}>
+                          Check grammar
+                        </button>
+                      </>
+                    )}
+                    <div className="menu-sep" />
+                    <button onClick={toggleTheme}>{theme === "dark" ? "Light mode" : "Dark mode"}</button>
+                  </div>
+                </>
+              )}
+            </div>
+          )}
         </div>
       </header>
 
@@ -238,53 +402,55 @@ export function EditorView() {
       />
 
       <div className="body">
-        <Sidebar />
-        <ResizeHandle pane="sidebar" />
+        <Sidebar
+          onNavigate={() => {
+            if (isCompact) setSidebarOpen(false);
+            focusEditorSoon();
+          }}
+        />
+        {sidebarOpen && !isCompact && <ResizeHandle pane="sidebar" />}
         <main className="editor-pane">
-          {coverActive ? (
-            <CoverView />
-          ) : (
-            <>
-              <article className="sheet">
-                <header className="chapter-opener">
-                  <div className="chapter-num">{eyebrow}</div>
+          {coverActive && <CoverView />}
+          <article className="sheet" hidden={coverActive}>
+            <header className="chapter-opener">
+              <div className="chapter-num">{eyebrow}</div>
+              <ChapterTitleInput
+                value={chapter.title}
+                placeholder={
+                  chapter.noTitle ? "No title" : kind === "body" ? "Chapter title" : kind === "part" ? "Part title (optional)" : "Page title"
+                }
+                disabled={!!chapter.noTitle}
+                onChange={(value) => setChapterTitle(chapter.id, value)}
+              />
+              {(chapter.noTitle || !chapter.title.trim()) && (
+                <label className="no-title-check">
                   <input
-                    className="chapter-title-input"
-                    value={chapter.noTitle ? "" : chapter.title}
-                    placeholder={chapter.noTitle ? "No title" : kind === "body" ? "Chapter title" : "Page title"}
-                    spellCheck={false}
-                    disabled={chapter.noTitle}
-                    onChange={(e) => setChapterTitle(chapter.id, e.target.value)}
+                    type="checkbox"
+                    checked={!!chapter.noTitle}
+                    onChange={(e) => setChapterNoTitle(chapter.id, e.target.checked)}
                   />
-                  {(chapter.noTitle || !chapter.title.trim()) && (
-                    <label className="no-title-check">
-                      <input
-                        type="checkbox"
-                        checked={!!chapter.noTitle}
-                        onChange={(e) => setChapterNoTitle(chapter.id, e.target.checked)}
-                      />
-                      No title
-                    </label>
-                  )}
-                </header>
-                <Editor
-                  key={chapter.id}
-                  bookId={book.id}
-                  chapterId={chapter.id}
-                  content={chapter.content}
-                  onChange={(content) => setChapterContent(chapter.id, content)}
-                  onReady={setEditor}
-                  onContentError={() =>
-                    setNotice("This chapter contains content Margin couldn't fully read; editing may drop the unrecognized parts.")
-                  }
-                />
-              </article>
-              <FloatingToolbar editor={editor} />
-            </>
-          )}
+                  No title
+                </label>
+              )}
+            </header>
+            <Editor
+              bookId={book.id}
+              chapterId={chapter.id}
+              content={chapter.content}
+              onChange={(content) => setChapterContent(chapter.id, content)}
+              onReady={setEditor}
+              onContentError={() =>
+                setNotice("This chapter contains content Margin couldn't fully read; editing may drop the unrecognized parts.")
+              }
+            />
+          </article>
+          {!coverActive && <FloatingToolbar editor={editor} />}
         </main>
-        {dock && <ResizeHandle pane="dock" />}
+        {dock && !isCompact && <ResizeHandle pane="dock" />}
         {dock && <Dock />}
+        {isCompact && (sidebarOpen || dock) && (
+          <button className="drawer-scrim" aria-label="Close panel" onClick={closeDrawers} />
+        )}
       </div>
 
       {proofPopover && editor && (
@@ -324,3 +490,38 @@ export function EditorView() {
     </div>
   );
 }
+
+function ChapterTitleInput({
+  value,
+  placeholder,
+  disabled,
+  onChange,
+}: {
+  value: string;
+  placeholder: string;
+  disabled: boolean;
+  onChange: (value: string) => void;
+}) {
+  const ref = useRef<HTMLTextAreaElement>(null);
+
+  useLayoutEffect(() => {
+    const el = ref.current;
+    if (!el) return;
+    el.style.height = "auto";
+    el.style.height = `${el.scrollHeight}px`;
+  }, [value, disabled]);
+
+  return (
+    <textarea
+      ref={ref}
+      className="chapter-title-input"
+      rows={1}
+      value={value}
+      placeholder={placeholder}
+      spellCheck={false}
+      disabled={disabled}
+      onKeyDown={(e) => e.key === "Enter" && e.preventDefault()}
+      onChange={(e) => onChange(e.target.value)}
+    />
+  );
+}

src/components/ExportPreview.tsx

@@ -0,0 +1,339 @@
+import { useEffect, useLayoutEffect, useRef, useState } from "react";
+import * as pdfjs from "pdfjs-dist";
+import type { PDFDocumentProxy, RenderTask } from "pdfjs-dist";
+import workerUrl from "pdfjs-dist/build/pdf.worker.min.mjs?url";
+import { useBook } from "../store/useBook";
+import { useExportPreview } from "../store/useExportPreview";
+import { bookToPdfInputs, unsupportedScripts } from "../export/typst";
+import { compilePdf } from "../ipc";
+import { saveBytes } from "../project";
+import { Icon } from "./Icon";
+
+pdfjs.GlobalWorkerOptions.workerSrc = workerUrl;
+
+const PDF_FILTER = [{ name: "PDF", extensions: ["pdf"] }];
+const ZOOM_MIN = 0.5;
+const ZOOM_MAX = 2.5;
+const ZOOM_STEP = 0.25;
+
+interface Frame {
+  left: number;
+  top: number;
+  width: number;
+  height: number;
+}
+
+function measureEditorPane(): Frame | null {
+  const pane = document.querySelector(".editor-pane");
+  if (!pane) return null;
+  const r = pane.getBoundingClientRect();
+  return {
+    left: Math.round(r.left),
+    top: Math.round(r.top),
+    width: Math.round(r.width),
+    height: Math.round(r.height),
+  };
+}
+
+export function ExportPreview() {
+  const open = useExportPreview((s) => s.open);
+  const book = useBook((s) => s.book);
+  if (!open || !book) return null;
+  return <ExportPreviewModal />;
+}
+
+function ExportPreviewModal() {
+  const book = useBook((s) => s.book)!;
+  const close = useExportPreview((s) => s.close);
+  const [pdf, setPdf] = useState<Uint8Array | null>(null);
+  const [error, setError] = useState<string | null>(null);
+  const [pages, setPages] = useState(0);
+  const [zoom, setZoom] = useState(1);
+  const [saving, setSaving] = useState(false);
+  const [frame, setFrame] = useState<Frame | null>(measureEditorPane);
+  const panelRef = useRef<HTMLDivElement>(null);
+  const zoomRef = useRef(zoom);
+  zoomRef.current = zoom;
+
+  useLayoutEffect(() => {
+    const update = () => setFrame(measureEditorPane());
+    update();
+    const pane = document.querySelector(".editor-pane");
+    const observer = new ResizeObserver(update);
+    if (pane) observer.observe(pane);
+    window.addEventListener("resize", update);
+    return () => {
+      observer.disconnect();
+      window.removeEventListener("resize", update);
+    };
+  }, []);
+
+  useEffect(() => {
+    let cancelled = false;
+    setPdf(null);
+    setError(null);
+    const { source, images, fonts } = bookToPdfInputs(book);
+    compilePdf(source, images, false, fonts)
+      .then((bytes) => !cancelled && setPdf(bytes))
+      .catch((e) => !cancelled && setError(String(e)));
+    return () => {
+      cancelled = true;
+    };
+  }, [book]);
+
+  useEffect(() => {
+    const onKey = (e: KeyboardEvent) => {
+      if (e.key === "Escape") close();
+    };
+    window.addEventListener("keydown", onKey);
+    return () => window.removeEventListener("keydown", onKey);
+  }, [close]);
+
+  useEffect(() => {
+    const el = panelRef.current;
+    if (!el) return;
+    const clamp = (z: number) => Math.min(ZOOM_MAX, Math.max(ZOOM_MIN, z));
+    const snap = (z: number) => clamp(Math.round(z / ZOOM_STEP) * ZOOM_STEP);
+    let start = 1;
+    let accum = 0;
+
+    const onWheel = (e: WheelEvent) => {
+      if (!e.ctrlKey) return;
+      e.preventDefault();
+      accum += e.deltaY;
+      if (accum <= -40) {
+        accum = 0;
+        setZoom((z) => clamp(z + ZOOM_STEP));
+      } else if (accum >= 40) {
+        accum = 0;
+        setZoom((z) => clamp(z - ZOOM_STEP));
+      }
+    };
+    const onGestureStart = (e: Event) => {
+      e.preventDefault();
+      start = zoomRef.current;
+    };
+    const onGestureChange = (e: Event) => {
+      e.preventDefault();
+      const next = snap(start * (e as unknown as { scale: number }).scale);
+      setZoom((z) => (z === next ? z : next));
+    };
+    const onGestureEnd = (e: Event) => e.preventDefault();
+
+    el.addEventListener("wheel", onWheel, { passive: false });
+    el.addEventListener("gesturestart", onGestureStart);
+    el.addEventListener("gesturechange", onGestureChange);
+    el.addEventListener("gestureend", onGestureEnd);
+    return () => {
+      el.removeEventListener("wheel", onWheel);
+      el.removeEventListener("gesturestart", onGestureStart);
+      el.removeEventListener("gesturechange", onGestureChange);
+      el.removeEventListener("gestureend", onGestureEnd);
+    };
+  }, []);
+
+  const scripts = unsupportedScripts(book);
+
+  const save = async () => {
+    if (!pdf) return;
+    setSaving(true);
+    try {
+      await saveBytes(pdf, `${book.metadata.title || "Untitled"}.pdf`, PDF_FILTER);
+    } catch (e) {
+      setError(String(e));
+    } finally {
+      setSaving(false);
+    }
+  };
+
+  const adjustZoom = (delta: number) =>
+    setZoom((z) => Math.min(ZOOM_MAX, Math.max(ZOOM_MIN, Math.round((z + delta) * 100) / 100)));
+
+  const compact = (frame?.width ?? 1000) < 460;
+
+  return (
+    <div className="overlay preview-overlay" onClick={close}>
+      <div
+        ref={panelRef}
+        className="panel preview-panel"
+        style={frame ? { position: "fixed", left: frame.left, top: frame.top, width: frame.width, height: frame.height } : undefined}
+        onClick={(e) => e.stopPropagation()}
+      >
+        <header className="preview-bar">
+          <button className="icon-btn" onClick={close} title="Close (Esc)">
+            <Icon d="M6 6l12 12M18 6L6 18" />
+          </button>
+          <div className="preview-title">{book.metadata.title || "Untitled"}</div>
+          {pdf && !compact && (
+            <span className="preview-count">
+              {pages} {pages === 1 ? "page" : "pages"}
+            </span>
+          )}
+          <div className="preview-zoom">
+            <button className="icon-btn" disabled={!pdf || zoom <= ZOOM_MIN} onClick={() => adjustZoom(-ZOOM_STEP)} title="Zoom out">
+              <Icon d="M5 12h14" />
+            </button>
+            {!compact && <span>{Math.round(zoom * 100)}%</span>}
+            <button className="icon-btn" disabled={!pdf || zoom >= ZOOM_MAX} onClick={() => adjustZoom(ZOOM_STEP)} title="Zoom in">
+              <Icon d="M12 5v14M5 12h14" />
+            </button>
+          </div>
+          <button className="btn-primary" disabled={!pdf || saving} onClick={save}>
+            {saving ? "Saving…" : compact ? "Save" : "Save PDF…"}
+          </button>
+        </header>
+
+        {pdf && scripts.length > 0 && (
+          <div className="preview-warn">
+            Some {scripts.join(", ")} characters may not render — the PDF fonts cover Latin scripts only.
+          </div>
+        )}
+
+        {error ? (
+          <div className="preview-stage">
+            <pre className="dock-error">{error}</pre>
+          </div>
+        ) : pdf ? (
+          <BookPages data={pdf} zoom={zoom} onPages={setPages} />
+        ) : (
+          <div className="preview-stage">
+            <div className="preview-loading">
+              <div className="spinner spinner-dark" />
+              <p>Typesetting your book…</p>
+            </div>
+          </div>
+        )}
+      </div>
+    </div>
+  );
+}
+
+function BookPages({ data, zoom, onPages }: { data: Uint8Array; zoom: number; onPages: (n: number) => void }) {
+  const stageRef = useRef<HTMLDivElement>(null);
+  const [doc, setDoc] = useState<PDFDocumentProxy | null>(null);
+  const [baseRatio, setBaseRatio] = useState<number | null>(null);
+  const [stageWidth, setStageWidth] = useState(0);
+
+  useEffect(() => {
+    let cancelled = false;
+    const task = pdfjs.getDocument({ data: data.slice() });
+    task.promise
+      .then(async (d) => {
+        if (cancelled) return;
+        const first = (await d.getPage(1)).getViewport({ scale: 1 });
+        if (cancelled) return;
+        setDoc(d);
+        setBaseRatio(first.height / first.width);
+        onPages(d.numPages);
+      })
+      .catch(() => {});
+    return () => {
+      cancelled = true;
+      task.destroy();
+    };
+  }, [data, onPages]);
+
+  useEffect(() => {
+    const stage = stageRef.current;
+    if (!stage) return;
+    const update = () => setStageWidth(stage.clientWidth);
+    update();
+    const observer = new ResizeObserver(update);
+    observer.observe(stage);
+    return () => observer.disconnect();
+  }, [doc]);
+
+  const fit = Math.max(280, stageWidth - 56);
+  const displayWidth = Math.round(fit * zoom);
+
+  return (
+    <div className="preview-stage" ref={stageRef}>
+      {doc && baseRatio !== null && stageWidth > 0 && (
+        <div className="preview-col">
+          {Array.from({ length: doc.numPages }, (_, i) => (
+            <PdfPage
+              key={i + 1}
+              doc={doc}
+              pageNumber={i + 1}
+              root={stageRef.current}
+              displayWidth={displayWidth}
+              baseRatio={baseRatio}
+            />
+          ))}
+        </div>
+      )}
+    </div>
+  );
+}
+
+function PdfPage({
+  doc,
+  pageNumber,
+  root,
+  displayWidth,
+  baseRatio,
+}: {
+  doc: PDFDocumentProxy;
+  pageNumber: number;
+  root: HTMLElement | null;
+  displayWidth: number;
+  baseRatio: number;
+}) {
+  const holder = useRef<HTMLDivElement>(null);
+  const [show, setShow] = useState(false);
+  const [ratio, setRatio] = useState(baseRatio);
+
+  useEffect(() => {
+    const el = holder.current;
+    if (!el) return;
+    const observer = new IntersectionObserver(([entry]) => setShow(entry.isIntersecting), {
+      root,
+      rootMargin: "1400px 0px",
+    });
+    observer.observe(el);
+    return () => observer.disconnect();
+  }, [root]);
+
+  useEffect(() => {
+    const el = holder.current;
+    if (!el) return;
+    if (!show) {
+      el.replaceChildren();
+      return;
+    }
+    let cancelled = false;
+    let task: RenderTask | undefined;
+    (async () => {
+      try {
+        const page = await doc.getPage(pageNumber);
+        if (cancelled) return;
+        const natural = page.getViewport({ scale: 1 });
+        setRatio(natural.height / natural.width);
+        const dpr = Math.min(window.devicePixelRatio || 1, 2);
+        const viewport = page.getViewport({ scale: (displayWidth / natural.width) * dpr });
+        const canvas = document.createElement("canvas");
+        canvas.className = "preview-canvas";
+        canvas.width = Math.ceil(viewport.width);
+        canvas.height = Math.ceil(viewport.height);
+        task = page.render({ canvas, viewport });
+        await task.promise;
+        if (cancelled) return;
+        el.replaceChildren(canvas);
+      } catch {
+        // render cancelled or page failed; keep the previous canvas
+      }
+    })();
+    return () => {
+      cancelled = true;
+      task?.cancel();
+    };
+  }, [show, doc, pageNumber, displayWidth]);
+
+  return (
+    <div
+      ref={holder}
+      className="preview-page"
+      style={{ width: displayWidth, height: Math.round(displayWidth * ratio) }}
+    />
+  );
+}

src/components/FindBar.tsx

@@ -58,7 +58,7 @@ export function FindBar({ editor, open, initialExpanded, onClose }: FindBarProps
     return () => {
       editor.off("transaction", update);
     };
-  }, [editor]);
+  }, [editor, activeChapterId]);
 
   useEffect(() => {
     if (!editor) return;
@@ -67,7 +67,7 @@ export function FindBar({ editor, open, initialExpanded, onClose }: FindBarProps
     } else {
       editor.commands.clearSearch();
     }
-  }, [editor, open, query, caseSensitive, wholeWord]);
+  }, [editor, open, query, caseSensitive, wholeWord, activeChapterId]);
 
   useEffect(() => {
     if (open) {

src/components/Library.tsx

@@ -7,13 +7,20 @@ import { isDesktop } from "../ipc";
 import { ConfirmDialog } from "./ConfirmDialog";
 import { Icon } from "./Icon";
 import { RowMenu } from "./RowMenu";
+import { BackupButton } from "./BackupButton";
+import { useBackup } from "../store/useBackup";
+import { useBook } from "../store/useBook";
 
 export function Library({ onOpen }: { onOpen: (book: Book) => void }) {
   const [books, setBooks] = useState<BookSummary[]>([]);
   const [loaded, setLoaded] = useState(false);
   const [busy, setBusy] = useState(false);
-  const [notice, setNotice] = useState<string | null>(null);
   const [pendingDelete, setPendingDelete] = useState<BookSummary | null>(null);
+  const notice = useBook((s) => s.notice);
+  const setNotice = useBook((s) => s.setNotice);
+  const restoreNonce = useBackup((s) => s.restoreNonce);
+  const restoreWorking = useBackup((s) => s.phase === "working");
+  const restoreFromDrive = useBackup((s) => s.restoreFromDrive);
 
   const refresh = () =>
     listBooks()
@@ -23,6 +30,14 @@ export function Library({ onOpen }: { onOpen: (book: Book) => void }) {
   useEffect(() => {
     refresh();
   }, []);
+  useEffect(() => {
+    if (restoreNonce) refresh();
+  }, [restoreNonce]);
+  useEffect(() => {
+    if (!notice) return;
+    const timer = setTimeout(() => setNotice(null), 4000);
+    return () => clearTimeout(timer);
+  }, [notice]);
 
   const handleExample = async () => {
     const copy = exampleBook();
@@ -36,6 +51,11 @@ export function Library({ onOpen }: { onOpen: (book: Book) => void }) {
     onOpen(copy);
   };
 
+  const openById = (id: string) =>
+    loadBook(id)
+      .then(onOpen)
+      .catch((e) => setNotice(`Could not open book: ${e}`));
+
   const removeBook = async () => {
     if (!pendingDelete) return;
     await deleteBook(pendingDelete.id);
@@ -64,7 +84,9 @@ export function Library({ onOpen }: { onOpen: (book: Book) => void }) {
 
   return (
     <div className="library">
-      <header className="library-head" data-tauri-drag-region />
+      <header className="library-head" data-tauri-drag-region>
+        {isDesktop && <BackupButton />}
+      </header>
       <div className="shelf">
         <button className="card card-action" onClick={() => createAndOpenBook(onOpen, setNotice)}>
           <Icon d="M12 5v14M5 12h14" size={20} />
@@ -91,7 +113,15 @@ export function Library({ onOpen }: { onOpen: (book: Book) => void }) {
             <div
               key={b.id}
               className="card card-book"
-              onClick={() => loadBook(b.id).then(onOpen).catch((e) => setNotice(`Could not open book: ${e}`))}
+              role="button"
+              tabIndex={0}
+              onClick={() => openById(b.id)}
+              onKeyDown={(e) => {
+                if (e.key === "Enter" || e.key === " ") {
+                  e.preventDefault();
+                  openById(b.id);
+                }
+              }}
             >
               <span className="card-title">{b.title || "Untitled"}</span>
               {b.author && <span className="card-author">{b.author}</span>}
@@ -100,6 +130,14 @@ export function Library({ onOpen }: { onOpen: (book: Book) => void }) {
           ),
         )}
       </div>
+      {loaded && books.length === 0 && isDesktop && (
+        <div className="library-restore">
+          <button className="restore-link" onClick={restoreFromDrive} disabled={restoreWorking}>
+            <Icon d="M21 12a9 9 0 1 1-2.6-6.4M21 4v5h-5" size={15} />
+            {restoreWorking ? "Restoring…" : "Restore from Google Drive"}
+          </button>
+        </div>
+      )}
       {notice && (
         <div className="toast" onClick={() => setNotice(null)}>
           {notice}

src/components/RowMenu.tsx

@@ -6,11 +6,20 @@ interface RowMenuProps {
   label: string;
   onDuplicate?: () => void;
   onDelete: () => void;
+  onToggleTitle?: () => void;
+  titleHidden?: boolean;
+  onToggleMargin?: () => void;
+  marginHidden?: boolean;
+  onOpenChange?: (open: boolean) => void;
   className?: string;
 }
 
-export function RowMenu({ label, onDuplicate, onDelete, className = "" }: RowMenuProps) {
+export function RowMenu({ label, onDuplicate, onDelete, onToggleTitle, titleHidden, onToggleMargin, marginHidden, onOpenChange, className = "" }: RowMenuProps) {
   const [open, setOpen] = useState(false);
+
+  useEffect(() => {
+    onOpenChange?.(open);
+  }, [open]);
   const [coords, setCoords] = useState({ top: 0, right: 0 });
   const btnRef = useRef<HTMLButtonElement>(null);
   const popRef = useRef<HTMLDivElement>(null);
@@ -24,6 +33,25 @@ export function RowMenu({ label, onDuplicate, onDelete, className = "" }: RowMen
     setOpen((v) => !v);
   };
 
+  useEffect(() => {
+    if (!open) return;
+    popRef.current?.querySelector<HTMLElement>(".row-menu-item")?.focus();
+  }, [open]);
+
+  const onMenuKeyDown = (e: React.KeyboardEvent) => {
+    if (e.key === "Escape") {
+      e.preventDefault();
+      setOpen(false);
+      btnRef.current?.focus();
+    } else if (e.key === "ArrowDown" || e.key === "ArrowUp") {
+      e.preventDefault();
+      const items = Array.from(popRef.current?.querySelectorAll<HTMLElement>(".row-menu-item") ?? []);
+      const idx = items.indexOf(document.activeElement as HTMLElement);
+      const nextIdx = e.key === "ArrowDown" ? (idx + 1) % items.length : (idx - 1 + items.length) % items.length;
+      items[nextIdx]?.focus();
+    }
+  };
+
   useEffect(() => {
     if (!open) return;
     const onDown = (e: MouseEvent) => {
@@ -41,6 +69,18 @@ export function RowMenu({ label, onDuplicate, onDelete, className = "" }: RowMen
     };
   }, [open]);
 
+  const toggleTitle = (e: React.MouseEvent) => {
+    e.stopPropagation();
+    setOpen(false);
+    onToggleTitle?.();
+  };
+
+  const toggleMargin = (e: React.MouseEvent) => {
+    e.stopPropagation();
+    setOpen(false);
+    onToggleMargin?.();
+  };
+
   const duplicate = (e: React.MouseEvent) => {
     e.stopPropagation();
     setOpen(false);
@@ -67,7 +107,27 @@ export function RowMenu({ label, onDuplicate, onDelete, className = "" }: RowMen
       </button>
       {open &&
         createPortal(
-          <div ref={popRef} className="row-menu-pop" style={{ top: coords.top, right: coords.right }}>
+          <div ref={popRef} className="row-menu-pop" style={{ top: coords.top, right: coords.right }} onKeyDown={onMenuKeyDown}>
+            {onToggleTitle && (
+              <button className="row-menu-item" onClick={toggleTitle}>
+                {titleHidden ? (
+                  <Icon d="M1 12s4-8 11-8 11 8 11 8-4 8-11 8-11-8-11-8z M12 9a3 3 0 1 0 0 6 3 3 0 0 0 0-6z" size={14} />
+                ) : (
+                  <Icon d="M17.94 17.94A10.07 10.07 0 0 1 12 20c-7 0-11-8-11-8a18.45 18.45 0 0 1 5.06-5.94M9.9 4.24A9.12 9.12 0 0 1 12 4c7 0 11 8 11 8a18.5 18.5 0 0 1-2.16 3.19m-6.72-1.07a3 3 0 1 1-4.24-4.24M1 1l22 22" size={14} />
+                )}
+                {titleHidden ? "Show title" : "Hide title"}
+              </button>
+            )}
+            {onToggleMargin && (
+              <button className="row-menu-item" onClick={toggleMargin}>
+                {marginHidden ? (
+                  <Icon d="M4 5h16 M12 10v10 M8 16l4 4 4-4" size={14} />
+                ) : (
+                  <Icon d="M4 5h16 M12 20V10 M8 14l4-4 4 4" size={14} />
+                )}
+                {marginHidden ? "Show top margin" : "Hide top margin"}
+              </button>
+            )}
             {onDuplicate && (
               <button className="row-menu-item" onClick={duplicate}>
                 <Icon d="M9 9h11v11h-11z M6 15V5h9" size={14} />

src/components/Settings.tsx

@@ -1,6 +1,18 @@
-import { useState } from "react";
+import { useEffect, useState } from "react";
 import type { ReactNode } from "react";
 import { useBook } from "../store/useBook";
+import { listSystemFonts } from "../ipc";
+import {
+  type BookFonts,
+  type FontRef,
+  BUNDLED_FONTS,
+  DEFAULT_FONTS,
+  FONT_PAIRINGS,
+  decodeRef,
+  encodeRef,
+  fontStack,
+  pairingFor,
+} from "../model/fonts";
 import { Icon } from "./Icon";
 
 const LANGUAGES = [
@@ -12,6 +24,8 @@ const LANGUAGES = [
   { value: "pt", label: "Portuguese" },
 ];
 
+let systemFontCache: string[] | null = null;
+
 interface Draft {
   title: string;
   subtitle: string;
@@ -19,6 +33,7 @@ interface Draft {
   isbn: string;
   language: string;
   bleed: boolean;
+  fonts: BookFonts;
 }
 
 function Field({ label, children }: { label: string; children: ReactNode }) {
@@ -30,6 +45,30 @@ function Field({ label, children }: { label: string; children: ReactNode }) {
   );
 }
 
+function FontSelect({ value, system, onChange }: { value: FontRef; system: string[]; onChange: (ref: FontRef) => void }) {
+  const extra = value.kind === "system" && !system.includes(value.family) ? [value.family] : [];
+  return (
+    <select value={encodeRef(value)} style={{ fontFamily: fontStack(value) }} onChange={(e) => onChange(decodeRef(e.target.value))}>
+      <optgroup label="Bundled">
+        {BUNDLED_FONTS.map((f) => (
+          <option key={f.id} value={`b:${f.id}`}>
+            {f.label}
+          </option>
+        ))}
+      </optgroup>
+      {(system.length > 0 || extra.length > 0) && (
+        <optgroup label="System">
+          {[...extra, ...system].map((name) => (
+            <option key={name} value={`s:${name}`}>
+              {name}
+            </option>
+          ))}
+        </optgroup>
+      )}
+    </select>
+  );
+}
+
 export function Settings({ onClose, onSave }: { onClose: () => void; onSave: () => void }) {
   const book = useBook((s) => s.book);
   const setMetadata = useBook((s) => s.setMetadata);
@@ -42,16 +81,42 @@ export function Settings({ onClose, onSave }: { onClose: () => void; onSave: ()
     isbn: book?.metadata.isbn ?? "",
     language: book?.metadata.language ?? "en",
     bleed: book?.settings.bleed ?? true,
+    fonts: book?.settings.fonts ?? DEFAULT_FONTS,
   }));
+  const [system, setSystem] = useState<string[]>(() => systemFontCache ?? []);
+  const [advanced, setAdvanced] = useState(() => pairingFor(draft.fonts) === null);
+
+  useEffect(() => {
+    if (systemFontCache) return;
+    listSystemFonts().then((fonts) => {
+      systemFontCache = fonts;
+      setSystem(fonts);
+    });
+  }, []);
+
+  useEffect(() => {
+    const onKey = (e: KeyboardEvent) => {
+      if (e.key === "Escape") {
+        e.preventDefault();
+        onClose();
+      }
+    };
+    window.addEventListener("keydown", onKey);
+    return () => window.removeEventListener("keydown", onKey);
+  }, [onClose]);
 
   if (!book) return null;
 
   const set = (patch: Partial<Draft>) => setDraft((d) => ({ ...d, ...patch }));
+  const setFont = (slot: "body" | "heading", ref: FontRef) => set({ fonts: { ...draft.fonts, [slot]: ref } });
+
+  const activePreset = pairingFor(draft.fonts);
+  const usesSystem = draft.fonts.body.kind === "system" || draft.fonts.heading.kind === "system";
 
   const save = () => {
-    const { bleed, ...metadata } = draft;
+    const { bleed, fonts, ...metadata } = draft;
     setMetadata(metadata);
-    setSettings({ bleed });
+    setSettings({ bleed, fonts });
     onSave();
     onClose();
   };
@@ -67,7 +132,7 @@ export function Settings({ onClose, onSave }: { onClose: () => void; onSave: ()
         </div>
         <div className="panel-body">
           <Field label="Title">
-            <input value={draft.title} placeholder="Untitled" onChange={(e) => set({ title: e.target.value })} />
+            <input autoFocus value={draft.title} placeholder="Untitled" onChange={(e) => set({ title: e.target.value })} />
           </Field>
           <Field label="Subtitle">
             <input value={draft.subtitle} onChange={(e) => set({ subtitle: e.target.value })} />
@@ -87,6 +152,51 @@ export function Settings({ onClose, onSave }: { onClose: () => void; onSave: ()
               ))}
             </select>
           </Field>
+
+          <div className="field">
+            <span className="field-label">Typography</span>
+            <div className="font-presets">
+              {FONT_PAIRINGS.map((p) => (
+                <button
+                  key={p.id}
+                  type="button"
+                  className="font-preset"
+                  data-on={activePreset === p.id}
+                  onClick={() => set({ fonts: { body: p.body, heading: p.heading } })}
+                >
+                  <span className="font-preset-demo" style={{ fontFamily: fontStack(p.heading) }}>
+                    Ag
+                  </span>
+                  <span className="font-preset-name">{p.label}</span>
+                </button>
+              ))}
+            </div>
+            <button type="button" className="font-advanced" onClick={() => setAdvanced((v) => !v)}>
+              {advanced ? "Hide custom fonts" : "Customize fonts"}
+            </button>
+          </div>
+
+          {advanced && (
+            <>
+              <Field label="Body font">
+                <FontSelect value={draft.fonts.body} system={system} onChange={(ref) => setFont("body", ref)} />
+              </Field>
+              <Field label="Heading font">
+                <FontSelect value={draft.fonts.heading} system={system} onChange={(ref) => setFont("heading", ref)} />
+              </Field>
+              {usesSystem && (
+                <p className="font-note">System fonts preview here but may not embed in exported PDF or EPUB, so they can look different on other devices.</p>
+              )}
+            </>
+          )}
+
+          <div className="font-sample" style={{ fontFamily: fontStack(draft.fonts.body) }}>
+            <span className="font-sample-title" style={{ fontFamily: fontStack(draft.fonts.heading) }}>
+              Chapter One
+            </span>
+            She read the first line twice, and the whole quiet house seemed to lean in to listen.
+          </div>
+
           <label className="check">
             <input type="checkbox" checked={draft.bleed} onChange={(e) => set({ bleed: e.target.checked })} />
             Add bleed for full-page images (print)

src/components/Sidebar.tsx

@@ -1,6 +1,6 @@
 import { useEffect, useRef, useState } from "react";
 import { COVER_ID, useBook } from "../store/useBook";
-import { type Chapter, type ChapterKind, bodyNumber, chapterKind } from "../model/book";
+import { type Chapter, type ChapterKind, bodyNumber, chapterKind, partNumber, partRoman } from "../model/book";
 import { AddPageMenu } from "./AddPageMenu";
 import { ConfirmDialog } from "./ConfirmDialog";
 import { Icon } from "./Icon";
@@ -10,6 +10,8 @@ interface Row {
   chapter: Chapter;
   index: number;
   num: number | null;
+  part: number | null;
+  indent: boolean;
 }
 
 interface DropTarget {
@@ -37,13 +39,16 @@ function formatEdited(ts: number, now: number): string {
   return new Date(ts).toLocaleDateString(undefined, { month: "short", day: "numeric", year: "numeric" });
 }
 
-export function Sidebar() {
+export function Sidebar({ onNavigate }: { onNavigate?: () => void }) {
   const chapters = useBook((s) => s.book?.chapters ?? []);
   const activeChapterId = useBook((s) => s.activeChapterId);
   const setActiveChapter = useBook((s) => s.setActiveChapter);
   const addChapter = useBook((s) => s.addChapter);
   const addPage = useBook((s) => s.addPage);
+  const addPart = useBook((s) => s.addPart);
   const duplicateChapter = useBook((s) => s.duplicateChapter);
+  const setChapterNoTitle = useBook((s) => s.setChapterNoTitle);
+  const setChapterNoMargin = useBook((s) => s.setChapterNoMargin);
   const deleteChapter = useBook((s) => s.deleteChapter);
   const moveChapter = useBook((s) => s.moveChapter);
   const closeBook = useBook((s) => s.closeBook);
@@ -51,6 +56,7 @@ export function Sidebar() {
   const [dragIndex, setDragIndex] = useState<number | null>(null);
   const [dropTarget, setDropTarget] = useState<DropTarget | null>(null);
   const [pendingDelete, setPendingDelete] = useState<{ id: string; title: string } | null>(null);
+  const [menuOpenId, setMenuOpenId] = useState<string | null>(null);
   const [now, setNow] = useState(() => Date.now());
 
   const dropRef = useRef<DropTarget | null>(null);
@@ -62,15 +68,23 @@ export function Sidebar() {
     return () => clearInterval(timer);
   }, []);
 
-  const rows: Row[] = chapters.map((chapter, index) => ({ chapter, index, num: bodyNumber(chapters, index) }));
+  const rows: Row[] = chapters.map((chapter, index) => ({
+    chapter,
+    index,
+    num: bodyNumber(chapters, index),
+    part: partNumber(chapters, index),
+    indent: chapterKind(chapter) === "body" && chapters.slice(0, index).some((c) => chapterKind(c) === "part"),
+  }));
+  const inBody = (r: Row) => chapterKind(r.chapter) === "body" || chapterKind(r.chapter) === "part";
   const groups: { kind: ChapterKind; label: string; rows: Row[] }[] = [
     { kind: "front", label: "Front matter", rows: rows.filter((r) => chapterKind(r.chapter) === "front") },
-    { kind: "body", label: "Chapters", rows: rows.filter((r) => chapterKind(r.chapter) === "body") },
+    { kind: "body", label: "Chapters", rows: rows.filter(inBody) },
     { kind: "back", label: "Back matter", rows: rows.filter((r) => chapterKind(r.chapter) === "back") },
   ];
   const groupEnd: Record<ChapterKind, number> = {
     front: groups[0].rows.length,
     body: groups[0].rows.length + groups[1].rows.length,
+    part: groups[0].rows.length + groups[1].rows.length,
     back: rows.length,
   };
 
@@ -125,7 +139,7 @@ export function Sidebar() {
   };
 
   const onRowPointerDown = (e: React.PointerEvent, index: number) => {
-    if (e.button !== 0 || (e.target as HTMLElement).closest(".row-menu-btn")) return;
+    if (e.button !== 0 || chapters[index]?.id === menuOpenId || (e.target as HTMLElement).closest(".row-menu-btn")) return;
     suppressClick.current = false;
     gesture.current = { from: index, x: e.clientX, y: e.clientY, active: false };
     window.addEventListener("pointermove", onPointerMove);
@@ -138,8 +152,36 @@ export function Sidebar() {
       return;
     }
     setActiveChapter(id);
+    onNavigate?.();
   };
 
+  const focusRow = (id: string) =>
+    requestAnimationFrame(() => {
+      document.querySelector<HTMLElement>(`.chapter[data-id="${CSS.escape(id)}"]`)?.focus();
+    });
+
+  const onRowKeyDown = (e: React.KeyboardEvent, index: number, id: string) => {
+    if (e.key === "Enter" || e.key === " ") {
+      e.preventDefault();
+      setActiveChapter(id);
+      onNavigate?.();
+    } else if (e.key === "ArrowDown" || e.key === "ArrowUp" || e.key === "Home" || e.key === "End") {
+      e.preventDefault();
+      const target =
+        e.key === "Home"
+          ? chapters[0]
+          : e.key === "End"
+            ? chapters[chapters.length - 1]
+            : chapters[index + (e.key === "ArrowDown" ? 1 : -1)];
+      if (target) {
+        setActiveChapter(target.id);
+        focusRow(target.id);
+      }
+    }
+  };
+
+  const tabStopId = chapters.some((c) => c.id === activeChapterId) ? activeChapterId : chapters[0]?.id;
+
   return (
     <aside className="sidebar">
       <button className="brand" onClick={closeBook} title="All books">
@@ -149,12 +191,15 @@ export function Sidebar() {
       <button
         className="cover-item"
         data-active={activeChapterId === COVER_ID}
-        onClick={() => setActiveChapter(COVER_ID)}
+        onClick={() => {
+          setActiveChapter(COVER_ID);
+          onNavigate?.();
+        }}
       >
         <Icon d="M5 4h11l3 3v13H5zM16 4v4h3" size={15} />
         <span className="title">Cover</span>
       </button>
-      <AddPageMenu onAdd={addPage} />
+      <AddPageMenu onAdd={addPage} onAddPart={addPart} />
 
       <div className="nav-scroll">
         {groups.map((group) =>
@@ -162,45 +207,71 @@ export function Sidebar() {
             <div key={group.kind} className="nav-section" data-kind={group.kind}>
               <div className="nav-label">{group.label}</div>
               <ul className="chapters">
-                {group.rows.map((row, i) => (
+                {group.rows.map((row, i) => {
+                  const isPart = chapterKind(row.chapter) === "part";
+                  const partLabel = `Part ${partRoman(row.part ?? 0)}`;
+                  const rowLabel = isPart
+                    ? row.chapter.title
+                      ? `${partLabel}: ${row.chapter.title}`
+                      : partLabel
+                    : row.chapter.title || "Untitled";
+                  return (
                   <li
                     key={row.chapter.id}
                     className="chapter"
                     data-idx={row.index}
+                    data-id={row.chapter.id}
                     data-kind={group.kind}
+                    data-part={isPart}
+                    data-indent={row.indent}
                     data-active={row.chapter.id === activeChapterId}
                     data-dragging={dragIndex === row.index}
                     data-drop-before={dropTarget?.kind === group.kind && dropTarget.index === row.index}
                     data-drop-after={dropTarget?.kind === group.kind && i === group.rows.length - 1 && dropTarget.index === row.index + 1}
+                    role="button"
+                    tabIndex={row.chapter.id === tabStopId ? 0 : -1}
+                    aria-current={row.chapter.id === activeChapterId}
                     onClick={() => onRowClick(row.chapter.id)}
+                    onKeyDown={(e) => onRowKeyDown(e, row.index, row.chapter.id)}
                     onPointerDown={(e) => onRowPointerDown(e, row.index)}
                   >
                     <span className="grip" title="Drag to reorder">
                       <Icon d="M9 6h.01M15 6h.01M9 12h.01M15 12h.01M9 18h.01M15 18h.01" size={14} />
                     </span>
-                    <span className="num">{row.num ?? ""}</span>
+                    {!isPart && <span className="num">{row.num ?? ""}</span>}
                     <span className="text">
-                      <span
-                        className="title"
-                        onMouseEnter={(e) => {
-                          const el = e.currentTarget;
-                          if (el.scrollWidth > el.clientWidth) el.title = row.chapter.title || "Untitled";
-                          else el.removeAttribute("title");
-                        }}
-                      >
-                        {row.chapter.title || "Untitled"}
-                      </span>
+                      {isPart && <span className="part-eyebrow">Part {partRoman(row.part ?? 0)}</span>}
+                      {(!isPart || row.chapter.title) && (
+                        <span
+                          className="title"
+                          onMouseEnter={(e) => {
+                            const el = e.currentTarget;
+                            if (el.scrollWidth > el.clientWidth) el.title = row.chapter.title || "Untitled";
+                            else el.removeAttribute("title");
+                          }}
+                        >
+                          {row.chapter.title || "Untitled"}
+                        </span>
+                      )}
                       {row.chapter.id === activeChapterId && (
                         <span className="meta">Edited {formatEdited(row.chapter.updatedAt, now)}</span>
                       )}
                     </span>
                     <RowMenu
                       label="Page options"
+                      onOpenChange={(open) =>
+                        setMenuOpenId((cur) => (open ? row.chapter.id : cur === row.chapter.id ? null : cur))
+                      }
+                      titleHidden={!!row.chapter.noTitle}
+                      onToggleTitle={() => setChapterNoTitle(row.chapter.id, !row.chapter.noTitle)}
+                      marginHidden={!!row.chapter.noMargin}
+                      onToggleMargin={() => setChapterNoMargin(row.chapter.id, !row.chapter.noMargin)}
                       onDuplicate={() => duplicateChapter(row.chapter.id)}
-                      onDelete={() => setPendingDelete({ id: row.chapter.id, title: row.chapter.title || "Untitled" })}
+                      onDelete={() => setPendingDelete({ id: row.chapter.id, title: rowLabel })}
                     />
                   </li>
-                ))}
+                  );
+                })}
                 {!group.rows.length && (
                   <li className="chapter-drop" data-on={dropTarget?.kind === group.kind}>
                     Drop here

src/components/UpdateDialog.tsx

@@ -0,0 +1,104 @@
+import { useUpdater } from "../store/useUpdater";
+import { installUpdate, dismissUpdate } from "../updater";
+import { Icon } from "./Icon";
+
+const TITLES: Record<string, string> = {
+  checking: "Check for Updates",
+  available: "Update Available",
+  downloading: "Updating margin",
+  installing: "Updating margin",
+  uptodate: "Check for Updates",
+  error: "Update Failed",
+};
+
+export function UpdateDialog() {
+  const phase = useUpdater((s) => s.phase);
+  const version = useUpdater((s) => s.version);
+  const notes = useUpdater((s) => s.notes);
+  const downloaded = useUpdater((s) => s.downloaded);
+  const total = useUpdater((s) => s.total);
+  const error = useUpdater((s) => s.error);
+
+  if (phase === "idle") return null;
+
+  const busy = phase === "downloading" || phase === "installing";
+  const pct = total > 0 ? Math.min(100, Math.round((downloaded / total) * 100)) : 0;
+  const close = busy ? undefined : dismissUpdate;
+
+  return (
+    <div className="overlay" onClick={close}>
+      <div className="panel panel-confirm" onClick={(e) => e.stopPropagation()}>
+        <div className="panel-head">
+          <h2>{TITLES[phase]}</h2>
+          {!busy && (
+            <button className="icon-btn" onClick={dismissUpdate} title="Close">
+              <Icon d="M6 6l12 12M18 6L6 18" />
+            </button>
+          )}
+        </div>
+
+        <div className="panel-body">
+          {phase === "checking" && (
+            <div className="update-status-row">
+              <span className="update-spinner" />
+              <span>Checking for updates…</span>
+            </div>
+          )}
+
+          {phase === "uptodate" && <p className="confirm-text">margin is up to date.</p>}
+
+          {phase === "available" && (
+            <>
+              <p className="confirm-text">
+                <strong>margin {version}</strong> is available.
+              </p>
+              {notes && <div className="update-notes">{notes}</div>}
+            </>
+          )}
+
+          {phase === "downloading" && (
+            <>
+              <div className={`update-progress${total > 0 ? "" : " indeterminate"}`}>
+                <div className="update-progress-fill" style={total > 0 ? { width: `${pct}%` } : undefined} />
+              </div>
+              <p className="update-status">{total > 0 ? `Downloading update… ${pct}%` : "Downloading update…"}</p>
+            </>
+          )}
+
+          {phase === "installing" && (
+            <div className="update-status-row">
+              <span className="update-spinner" />
+              <span>Installing update. margin will restart…</span>
+            </div>
+          )}
+
+          {phase === "error" && (
+            <>
+              <p className="confirm-text">Could not update margin.</p>
+              {error && <div className="update-notes">{error}</div>}
+            </>
+          )}
+        </div>
+
+        {phase === "available" && (
+          <div className="panel-foot">
+            <button className="btn-ghost" onClick={dismissUpdate}>
+              Later
+            </button>
+            <button className="btn-primary" onClick={installUpdate}>
+              Install &amp; Restart
+            </button>
+          </div>
+        )}
+
+        {(phase === "uptodate" || phase === "error") && (
+          <div className="panel-foot">
+            <button className="btn-primary" onClick={dismissUpdate}>
+              OK
+            </button>
+          </div>
+        )}
+      </div>
+    </div>
+  );
+}

src/editor/Editor.tsx

@@ -1,8 +1,10 @@
-import { useEffect, useRef } from "react";
+import { useEffect, useLayoutEffect, useRef } from "react";
 import { EditorContent, useEditor, type Editor as TiptapEditor } from "@tiptap/react";
+import { EditorState } from "@tiptap/pm/state";
 import type { JSONContent } from "@tiptap/core";
 import { editorExtensions } from "./extensions";
 import { loadPosition, savePosition, type ChapterPosition } from "./positions";
+import { useBook } from "../store/useBook";
 
 interface EditorProps {
   bookId: string;
@@ -13,13 +15,34 @@ interface EditorProps {
   onContentError: (error: Error) => void;
 }
 
+interface Cached {
+  state: EditorState;
+  content: JSONContent;
+  scroll: number;
+}
+
+function buildState(editor: TiptapEditor, content: JSONContent, onError: (error: Error) => void): EditorState {
+  const base = editor.view.state;
+  try {
+    const doc = editor.schema.nodeFromJSON(content);
+    doc.check();
+    return EditorState.create({ doc, plugins: base.plugins });
+  } catch (error) {
+    onError(error as Error);
+    return EditorState.create({ schema: base.schema, plugins: base.plugins });
+  }
+}
+
 export function Editor({ bookId, chapterId, content, onChange, onReady, onContentError }: EditorProps) {
   const onChangeRef = useRef(onChange);
   onChangeRef.current = onChange;
   const onContentErrorRef = useRef(onContentError);
   onContentErrorRef.current = onContentError;
 
+  const cache = useRef(new Map<string, Cached>());
+  const activeId = useRef(chapterId);
   const latest = useRef<ChapterPosition | null>(null);
+  const restoreToken = useRef(0);
 
   const editor = useEditor({
     extensions: editorExtensions,
@@ -31,49 +54,84 @@ export function Editor({ bookId, chapterId, content, onChange, onReady, onConten
     onUpdate: ({ editor }) => onChangeRef.current(editor.getJSON()),
   });
 
-  useEffect(() => {
-    onReady(editor);
-    return () => onReady(null);
-  }, [editor, onReady]);
+  const scrollerOf = (ed: TiptapEditor) => ed.view.dom.closest(".editor-pane") as HTMLElement | null;
+
+  const restorePosition = (ed: TiptapEditor, id: string, focus: boolean) => {
+    const scroller = scrollerOf(ed);
+    const saved = loadPosition(bookId, id);
+    const size = ed.state.doc.content.size;
+    const selection = saved ? { from: Math.min(saved.from, size), to: Math.min(saved.to, size) } : 0;
+    const chain = ed.chain().setTextSelection(selection);
+    if (focus) chain.focus(undefined, { scrollIntoView: false });
+    chain.run();
+    if (scroller) {
+      const token = ++restoreToken.current;
+      const top = saved?.scroll ?? 0;
+      const apply = () => {
+        if (restoreToken.current === token) scroller.scrollTop = top;
+      };
+      apply();
+      requestAnimationFrame(apply);
+      document.fonts?.ready.then(apply).catch(() => {});
+    }
+  };
+
+  const stash = (ed: TiptapEditor, id: string) => {
+    const scroller = scrollerOf(ed);
+    const { from, to } = ed.state.selection;
+    const scroll = scroller?.scrollTop ?? 0;
+    const stored = useBook.getState().book?.chapters.find((c) => c.id === id)?.content ?? cache.current.get(id)?.content ?? ed.getJSON();
+    cache.current.set(id, { state: ed.view.state, content: stored, scroll });
+    savePosition(bookId, id, { from, to, scroll });
+  };
 
   useEffect(() => {
     if (!editor) return;
-    let active = true;
-    const scroller = editor.view.dom.closest(".editor-pane") as HTMLElement | null;
-
-    const saved = loadPosition(bookId, chapterId);
-    const size = editor.state.doc.content.size;
-    const selection = saved ? { from: Math.min(saved.from, size), to: Math.min(saved.to, size) } : 0;
-    editor.chain().setTextSelection(selection).focus(undefined, { scrollIntoView: false }).run();
-
-    if (scroller) {
-      const top = saved?.scroll ?? 0;
-      const restore = () => {
-        if (active) scroller.scrollTop = top;
-      };
-      restore();
-      requestAnimationFrame(restore);
-      document.fonts?.ready.then(restore).catch(() => {});
-    }
-
-    return () => {
-      active = false;
-    };
+    cache.current.set(chapterId, { state: editor.view.state, content, scroll: 0 });
+    activeId.current = chapterId;
+    restorePosition(editor, chapterId, true);
+    onReady(editor);
+    return () => onReady(null);
     // eslint-disable-next-line react-hooks/exhaustive-deps
   }, [editor]);
 
+  useLayoutEffect(() => {
+    if (!editor) return;
+    const prev = activeId.current;
+    if (prev === chapterId) return;
+
+    stash(editor, prev);
+    const entry = cache.current.get(chapterId);
+    if (entry && entry.content === content) {
+      editor.view.updateState(entry.state);
+      const scroller = scrollerOf(editor);
+      if (scroller) scroller.scrollTop = entry.scroll;
+      ++restoreToken.current;
+    } else {
+      editor.view.updateState(buildState(editor, content, onContentErrorRef.current));
+      cache.current.set(chapterId, { state: editor.view.state, content, scroll: 0 });
+      restorePosition(editor, chapterId, false);
+    }
+    activeId.current = chapterId;
+    latest.current = null;
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, [chapterId, content, editor]);
+
   useEffect(() => {
     if (!editor) return;
-    const scroller = editor.view.dom.closest(".editor-pane") as HTMLElement | null;
+    const scroller = scrollerOf(editor);
     let timer: ReturnType<typeof setTimeout>;
     const capture = () => {
       const { from, to } = editor.state.selection;
-      latest.current = { from, to, scroll: scroller?.scrollTop ?? 0 };
+      const scroll = scroller?.scrollTop ?? 0;
+      latest.current = { from, to, scroll };
+      const entry = cache.current.get(activeId.current);
+      if (entry) entry.scroll = scroll;
     };
     const persist = () => {
       capture();
       clearTimeout(timer);
-      timer = setTimeout(() => savePosition(bookId, chapterId, latest.current!), 400);
+      timer = setTimeout(() => savePosition(bookId, activeId.current, latest.current!), 400);
     };
     editor.on("selectionUpdate", persist);
     scroller?.addEventListener("scroll", persist, { passive: true });
@@ -81,9 +139,9 @@ export function Editor({ bookId, chapterId, content, onChange, onReady, onConten
       clearTimeout(timer);
       editor.off("selectionUpdate", persist);
       scroller?.removeEventListener("scroll", persist);
-      if (latest.current) savePosition(bookId, chapterId, latest.current);
+      if (latest.current) savePosition(bookId, activeId.current, latest.current);
     };
-  }, [editor, bookId, chapterId]);
+  }, [editor, bookId]);
 
   return <EditorContent editor={editor} className="editor-host" />;
 }

src/editor/FloatingToolbar.tsx

@@ -1,6 +1,13 @@
 import { useEffect, useReducer, useRef, useState, type ReactNode } from "react";
 import type { Editor } from "@tiptap/react";
 import { Icon } from "../components/Icon";
+import type { Alignment } from "./align";
+
+const ALIGN_ICONS: Record<Alignment, string> = {
+  left: "M4 7h16M4 12h10M4 17h13",
+  center: "M4 7h16M7 12h10M5 17h14",
+  right: "M4 7h16M10 12h10M7 17h13",
+};
 
 function readImage(file: File): Promise<string> {
   return new Promise((resolve, reject) => {
@@ -23,6 +30,7 @@ export function FloatingToolbar({ editor }: { editor: Editor | null }) {
   const linkInputRef = useRef<HTMLInputElement>(null);
   const [linkOpen, setLinkOpen] = useState(false);
   const [linkValue, setLinkValue] = useState("");
+  const [alignOpen, setAlignOpen] = useState(false);
   const [, forceUpdate] = useReducer((x) => x + 1, 0);
 
   useEffect(() => {
@@ -67,6 +75,13 @@ export function FloatingToolbar({ editor }: { editor: Editor | null }) {
     setLinkOpen(false);
   };
 
+  const align: Alignment = (editor.getAttributes("heading").align ?? editor.getAttributes("paragraph").align) || "left";
+
+  const setAlign = (value: Alignment) => {
+    editor.chain().focus().setTextAlign(value).run();
+    setAlignOpen(false);
+  };
+
   const tool = (active: boolean, onClick: () => void, title: string, content: ReactNode) => (
     <button
       className="tool"
@@ -87,6 +102,28 @@ export function FloatingToolbar({ editor }: { editor: Editor | null }) {
       {tool(editor.isActive("heading", { level: 2 }), () => editor.chain().focus().toggleHeading({ level: 2 }).run(), "Heading", <Icon d="M5 5v14M5 12h8M13 5v14" />)}
       {tool(editor.isActive("blockquote"), () => editor.chain().focus().toggleBlockquote().run(), "Quote", <Icon d="M7 8h4v4a4 4 0 0 1-4 4M14 8h4v4a4 4 0 0 1-4 4" />)}
       {tool(editor.isActive("bulletList"), () => editor.chain().focus().toggleBulletList().run(), "Bulleted list", <Icon d="M8 6h12M8 12h12M8 18h12M3.5 6h.01M3.5 12h.01M3.5 18h.01" />)}
+      <span className="tool-wrap">
+        {tool(alignOpen || align !== "left", () => setAlignOpen((v) => !v), "Align", <Icon d={ALIGN_ICONS[align]} />)}
+        {alignOpen && (
+          <>
+            <div className="link-pop-backdrop" onMouseDown={() => setAlignOpen(false)} />
+            <div className="align-pop" onMouseDown={(e) => e.stopPropagation()}>
+              {(["left", "center", "right"] as Alignment[]).map((value) => (
+                <button
+                  key={value}
+                  className="tool"
+                  data-on={align === value}
+                  title={`Align ${value}`}
+                  onMouseDown={(e) => e.preventDefault()}
+                  onClick={() => setAlign(value)}
+                >
+                  <Icon d={ALIGN_ICONS[value]} />
+                </button>
+              ))}
+            </div>
+          </>
+        )}
+      </span>
       <span className="tool-sep" />
       <span className="tool-wrap">
         {tool(editor.isActive("link") || linkOpen, () => (linkOpen ? setLinkOpen(false) : openLink()), "Link", <Icon d="M10 13a5 5 0 0 0 7 0l2-2a5 5 0 0 0-7-7l-1 1M14 11a5 5 0 0 0-7 0l-2 2a5 5 0 0 0 7 7l1-1" />)}

src/editor/align.ts

@@ -0,0 +1,64 @@
+import { Extension } from "@tiptap/core";
+
+export type Alignment = "left" | "center" | "right";
+
+const ALIGNED_TYPES = ["paragraph", "heading"];
+
+declare module "@tiptap/core" {
+  interface Commands<ReturnType> {
+    textAlign: {
+      setTextAlign: (align: Alignment) => ReturnType;
+    };
+  }
+}
+
+export const TextAlign = Extension.create({
+  name: "textAlign",
+
+  addGlobalAttributes() {
+    return [
+      {
+        types: ALIGNED_TYPES,
+        attributes: {
+          align: {
+            default: null,
+            keepOnSplit: true,
+            parseHTML: (el) => {
+              const value = el.style.textAlign || el.getAttribute("data-align");
+              return value === "center" || value === "right" ? value : null;
+            },
+            renderHTML: (attrs) =>
+              attrs.align ? { "data-align": attrs.align, style: `text-align: ${attrs.align}` } : {},
+          },
+        },
+      },
+    ];
+  },
+
+  addCommands() {
+    return {
+      setTextAlign:
+        (align) =>
+        ({ tr, dispatch }) => {
+          const value = align === "left" ? null : align;
+          const { from, to } = tr.selection;
+          let changed = false;
+          tr.doc.nodesBetween(from, to, (node, pos) => {
+            if (ALIGNED_TYPES.includes(node.type.name) && node.attrs.align !== value) {
+              if (dispatch) tr.setNodeAttribute(pos, "align", value);
+              changed = true;
+            }
+          });
+          return changed;
+        },
+    };
+  },
+
+  addKeyboardShortcuts() {
+    return {
+      "Mod-Shift-l": () => this.editor.commands.setTextAlign("left"),
+      "Mod-Shift-e": () => this.editor.commands.setTextAlign("center"),
+      "Mod-Shift-r": () => this.editor.commands.setTextAlign("right"),
+    };
+  },
+});

src/editor/extensions.ts

@@ -3,8 +3,10 @@ import StarterKit from "@tiptap/starter-kit";
 import Placeholder from "@tiptap/extension-placeholder";
 import { Figure } from "./figure";
 import { ParagraphIndent } from "./indent";
+import { TextAlign } from "./align";
 import { SearchHighlight } from "./search";
 import { Proofing } from "./proofing";
+import { Paste } from "./paste";
 
 export const editorExtensions: Extensions = [
   StarterKit.configure({
@@ -17,6 +19,8 @@ export const editorExtensions: Extensions = [
   }),
   Figure,
   ParagraphIndent,
+  TextAlign,
   SearchHighlight,
   Proofing,
+  Paste,
 ];

src/editor/paste.ts

@@ -0,0 +1,76 @@
+import { Extension } from "@tiptap/core";
+import type { JSONContent } from "@tiptap/core";
+import { Plugin } from "@tiptap/pm/state";
+
+function readImage(file: File): Promise<string> {
+  return new Promise((resolve, reject) => {
+    const reader = new FileReader();
+    reader.onload = () => resolve(reader.result as string);
+    reader.onerror = reject;
+    reader.readAsDataURL(file);
+  });
+}
+
+function imageFiles(data: DataTransfer | null): File[] {
+  if (!data) return [];
+  const files = Array.from(data.files).filter((f) => f.type.startsWith("image/"));
+  if (files.length) return files;
+  return Array.from(data.items)
+    .filter((item) => item.kind === "file" && item.type.startsWith("image/"))
+    .map((item) => item.getAsFile())
+    .filter((f): f is File => f !== null);
+}
+
+function plainContent(text: string): JSONContent[] {
+  return text
+    .replace(/\r\n?/g, "\n")
+    .split(/\n{2,}/)
+    .map((block) => {
+      const content: JSONContent[] = [];
+      block.split("\n").forEach((line, i) => {
+        if (i > 0) content.push({ type: "hardBreak" });
+        if (line) content.push({ type: "text", text: line });
+      });
+      return content.length ? { type: "paragraph", content } : { type: "paragraph" };
+    });
+}
+
+export const Paste = Extension.create({
+  name: "pasteHandler",
+
+  addKeyboardShortcuts() {
+    const editor = this.editor;
+    return {
+      "Mod-Shift-v": () => {
+        navigator.clipboard
+          .readText()
+          .then((text) => {
+            if (text) editor.chain().focus().insertContent(plainContent(text)).run();
+          })
+          .catch(() => {});
+        return true;
+      },
+    };
+  },
+
+  addProseMirrorPlugins() {
+    const editor = this.editor;
+    return [
+      new Plugin({
+        props: {
+          handlePaste(_view, event) {
+            const files = imageFiles(event.clipboardData);
+            if (!files.length) return false;
+            event.preventDefault();
+            files.forEach((file) =>
+              readImage(file).then((src) =>
+                editor.chain().focus().insertContent({ type: "figure", attrs: { src, placement: "full-width" } }).run(),
+              ),
+            );
+            return true;
+          },
+        },
+      }),
+    ];
+  },
+});

src/editor/proofing.ts

@@ -37,10 +37,11 @@ interface ProofingState {
 
 export const proofingKey = new PluginKey<ProofingState>("proofing");
 
-function buildDecorations(doc: PMNode, issues: ProofIssue[]): DecorationSet {
+function buildDecorations(doc: PMNode, issues: ProofIssue[], cursor: number | null): DecorationSet {
   const size = doc.content.size;
   const decos = issues
     .filter((i) => i.from < i.to && i.to <= size)
+    .filter((i) => cursor === null || cursor < i.from || cursor > i.to)
     .map((i) => Decoration.inline(i.from, i.to, { class: `proof-mark sev-${severityFor(i.category)}` }));
   return DecorationSet.create(doc, decos);
 }
@@ -73,9 +74,11 @@ export const Proofing = Extension.create<unknown, ProofingStorage>({
         state: {
           init: () => ({ issues: [], decorations: DecorationSet.empty }),
           apply(tr, value, _old, newState) {
+            const sel = newState.selection;
+            const cursor = sel.empty ? sel.head : null;
             const meta = tr.getMeta(proofingKey) as { issues: ProofIssue[] } | { clear: true } | undefined;
             if (meta && "issues" in meta) {
-              return { issues: meta.issues, decorations: buildDecorations(newState.doc, meta.issues) };
+              return { issues: meta.issues, decorations: buildDecorations(newState.doc, meta.issues, cursor) };
             }
             if (meta && "clear" in meta) {
               return { issues: [], decorations: DecorationSet.empty };
@@ -84,7 +87,10 @@ export const Proofing = Extension.create<unknown, ProofingStorage>({
               const issues = value.issues
                 .map((i) => ({ ...i, from: tr.mapping.map(i.from), to: tr.mapping.map(i.to) }))
                 .filter((i) => i.to > i.from);
-              return { issues, decorations: value.decorations.map(tr.mapping, tr.doc) };
+              return { issues, decorations: buildDecorations(newState.doc, issues, cursor) };
+            }
+            if (tr.selectionSet && value.issues.length) {
+              return { issues: value.issues, decorations: buildDecorations(newState.doc, value.issues, cursor) };
             }
             return value;
           },

src/export/epub.ts

@@ -1,6 +1,7 @@
 import type { JSONContent } from "@tiptap/core";
 import { invoke } from "@tauri-apps/api/core";
-import { type Book, type FigurePlacement, TRIM_DIMS, FIGURE_WIDTH, bodyNumber, chapterKind, isResizablePlacement } from "../model/book";
+import { type Book, type FigurePlacement, TRIM_DIMS, FIGURE_WIDTH, bodyNumber, chapterKind, isResizablePlacement, partNumber, partRoman } from "../model/book";
+import { fontStack, fontsUsed } from "../model/fonts";
 
 export interface EpubFile {
   path: string;
@@ -38,6 +39,56 @@ function mediaType(path: string): string {
   return "application/octet-stream";
 }
 
+interface FontAssets {
+  files: EpubFile[];
+  faces: string;
+  manifest: string[];
+}
+
+function base64FromBuffer(buffer: ArrayBuffer): string {
+  const bytes = new Uint8Array(buffer);
+  let binary = "";
+  const chunk = 0x8000;
+  for (let i = 0; i < bytes.length; i += chunk) {
+    binary += String.fromCharCode(...bytes.subarray(i, i + chunk));
+  }
+  return btoa(binary);
+}
+
+async function fetchFontBase64(file: string): Promise<string | null> {
+  try {
+    const res = await fetch(`/fonts/${file}`);
+    if (!res.ok) return null;
+    return base64FromBuffer(await res.arrayBuffer());
+  } catch {
+    return null;
+  }
+}
+
+async function loadFontAssets(book: Book): Promise<FontAssets> {
+  const used = fontsUsed(book.settings.fonts).bundled;
+  const files: EpubFile[] = [];
+  const faces: string[] = [];
+  const manifest: string[] = [];
+  let n = 0;
+  for (const font of used) {
+    const variants = [{ file: font.regular, style: "normal" }];
+    if (font.italic) variants.push({ file: font.italic, style: "italic" });
+    for (const variant of variants) {
+      const data = await fetchFontBase64(variant.file);
+      if (!data) continue;
+      const href = `fonts/${variant.file}`;
+      const id = `font-${++n}`;
+      files.push({ path: `OEBPS/${href}`, data, encoding: "base64" });
+      manifest.push(`<item id="${id}" href="${attr(href)}" media-type="font/ttf"/>`);
+      faces.push(
+        `@font-face {\n  font-family: "${font.family}";\n  font-style: ${variant.style};\n  font-weight: ${font.weight};\n  src: url("${href}");\n}`,
+      );
+    }
+  }
+  return { files, faces: faces.join("\n\n"), manifest };
+}
+
 function inline(node: JSONContent): string {
   if (node.type === "text") {
     let text = esc(node.text ?? "");
@@ -81,17 +132,23 @@ function figure(node: JSONContent, paths: Map<string, string>): string {
   return `<figure class="placement-${attr(placement)}"${style}><img src="${attr(path)}" alt="${alt}"/>${caption}</figure>`;
 }
 
+function alignStyle(align: unknown): string {
+  return align === "center" || align === "right" ? ` style="text-align:${align}"` : "";
+}
+
 function block(node: JSONContent, paths: Map<string, string>): string {
   switch (node.type) {
     case "paragraph": {
       const body = inlines(node.content);
       if (!body.trim()) return "<p>&#160;</p>";
+      const align = node.attrs?.align;
+      if (align === "center" || align === "right") return `<p${alignStyle(align)}>${body}</p>`;
       return `<p${node.attrs?.indent ? ' data-indent="true"' : ""}>${body}</p>`;
     }
-    case "heading":
-      return node.attrs?.level === 3
-        ? `<h3>${inlines(node.content)}</h3>`
-        : `<h2>${inlines(node.content)}</h2>`;
+    case "heading": {
+      const tag = node.attrs?.level === 3 ? "h3" : "h2";
+      return `<${tag}${alignStyle(node.attrs?.align)}>${inlines(node.content)}</${tag}>`;
+    }
     case "blockquote":
       return `<blockquote>${(node.content ?? []).map((n) => block(n, paths)).join("")}</blockquote>`;
     case "bulletList":
@@ -240,6 +297,7 @@ function contentOpf(
   chapterIds: string[],
   assetPaths: string[],
   cover: { href: string; mediaType: string },
+  fontManifest: string[],
 ): string {
   const meta = book.metadata;
   const manifest: string[] = [
@@ -247,8 +305,7 @@ function contentOpf(
     `<item id="cover" href="cover.xhtml" media-type="application/xhtml+xml"/>`,
     `<item id="nav" href="nav.xhtml" media-type="application/xhtml+xml" properties="nav"/>`,
     `<item id="css" href="style.css" media-type="text/css"/>`,
-    `<item id="font-regular" href="fonts/Literata-VF.ttf" media-type="font/ttf"/>`,
-    `<item id="font-italic" href="fonts/Literata-Italic-VF.ttf" media-type="font/ttf"/>`,
+    ...fontManifest,
   ];
   chapterIds.forEach((_, i) => {
     manifest.push(
@@ -287,9 +344,12 @@ function contentOpf(
 function navXhtml(book: Book): string {
   const items = book.chapters
     .map((chapter, i) => {
-      if (chapter.noTitle && chapterKind(chapter) !== "body") return "";
-      const fallback = chapterKind(chapter) === "body" ? `Chapter ${bodyNumber(book.chapters, i)}` : "Untitled";
-      const label = chapter.noTitle ? fallback : chapter.title || fallback;
+      const kind = chapterKind(chapter);
+      if (chapter.noTitle && kind !== "body" && kind !== "part") return "";
+      const partLabel = `Part ${partRoman(partNumber(book.chapters, i) ?? 0)}`;
+      const fallback = kind === "body" ? `Chapter ${bodyNumber(book.chapters, i)}` : kind === "part" ? partLabel : "Untitled";
+      const base = chapter.noTitle ? fallback : chapter.title || fallback;
+      const label = kind === "part" && !chapter.noTitle && chapter.title ? `${partLabel}: ${chapter.title}` : base;
       return `      <li><a href="chapter-${i + 1}.xhtml">${esc(label)}</a></li>`;
     })
     .filter(Boolean)
@@ -315,16 +375,20 @@ function chapterXhtml(book: Book, index: number, paths: Map<string, string>): st
   const chapter = book.chapters[index];
   const kind = chapterKind(chapter);
   const num = bodyNumber(book.chapters, index);
-  const title = chapter.title || (kind === "body" ? `Chapter ${num}` : "Untitled");
-  const eyebrow = kind === "body" ? `<p class="eyebrow">Chapter ${num}</p>` : "";
-  const heading = chapter.noTitle ? "" : `<h1>${esc(title)}</h1>`;
+  const partLabel = `Part ${partRoman(partNumber(book.chapters, index) ?? 0)}`;
+  const eyebrow =
+    kind === "body" ? `<p class="eyebrow">Chapter ${num}</p>` : kind === "part" ? `<p class="eyebrow">${esc(partLabel)}</p>` : "";
+  const headingText = kind === "part" ? chapter.title : chapter.title || (kind === "body" ? `Chapter ${num}` : "Untitled");
+  const heading = chapter.noTitle || (kind === "part" && !chapter.title) ? "" : `<h1>${esc(headingText)}</h1>`;
+  const docTitle = chapter.title || (kind === "part" ? partLabel : kind === "body" ? `Chapter ${num}` : "Untitled");
+  const epubType = kind === "body" ? "chapter" : kind === "part" ? "part" : kind === "front" ? "frontmatter" : "backmatter";
   return `<?xml version="1.0" encoding="UTF-8"?>
 <html xmlns="http://www.w3.org/1999/xhtml" xmlns:epub="http://www.idpf.org/2007/ops" lang="${attr(book.metadata.language || "en")}">
   <head>
-    <title>${esc(title)}</title>
+    <title>${esc(docTitle)}</title>
     <link rel="stylesheet" type="text/css" href="style.css"/>
   </head>
-  <body epub:type="${kind === "body" ? "chapter" : kind === "front" ? "frontmatter" : "backmatter"}">
+  <body epub:type="${epubType}">
     <header class="chapter-opener">
       ${eyebrow}
       ${heading}
@@ -334,23 +398,9 @@ function chapterXhtml(book: Book, index: number, paths: Map<string, string>): st
 </html>`;
 }
 
-function styleCss(): string {
-  return `@font-face {
-  font-family: "Literata";
-  font-style: normal;
-  font-weight: 300 700;
-  src: url("fonts/Literata-VF.ttf");
-}
-
-@font-face {
-  font-family: "Literata";
-  font-style: italic;
-  font-weight: 300 700;
-  src: url("fonts/Literata-Italic-VF.ttf");
-}
-
-html {
-  font-family: "Literata", Georgia, serif;
+function styleCss(book: Book, faces: string): string {
+  return `${faces ? faces + "\n\n" : ""}html {
+  font-family: ${fontStack(book.settings.fonts.body)};
 }
 
 .cover {
@@ -383,6 +433,7 @@ p[data-indent="true"] {
 }
 
 h1, h2, h3 {
+  font-family: ${fontStack(book.settings.fonts.heading)};
   hyphens: none;
   line-height: 1.25;
   font-weight: 500;
@@ -397,6 +448,18 @@ h2, h3 {
   margin: 3em 0 2.2em;
 }
 
+body[epub:type="part"] {
+  page-break-before: always;
+}
+
+body[epub:type="part"] .chapter-opener {
+  margin-top: 32vh;
+}
+
+body[epub:type="part"] .eyebrow {
+  font-size: 0.82em;
+}
+
 .eyebrow {
   text-transform: uppercase;
   letter-spacing: 0.28em;
@@ -477,7 +540,7 @@ figure.placement-float-top {
 `;
 }
 
-export function bookToEpub(book: Book): EpubFile[] {
+export function bookToEpub(book: Book, fontAssets: FontAssets): EpubFile[] {
   const { assets, paths } = extractFigures(book);
   const cover = buildCover(book);
   const chapterIds = book.chapters.map((c) => c.id);
@@ -488,12 +551,12 @@ export function bookToEpub(book: Book): EpubFile[] {
     { path: "META-INF/container.xml", data: containerXml(), encoding: "utf8" },
     {
       path: "OEBPS/content.opf",
-      data: contentOpf(book, chapterIds, assetPaths, cover),
+      data: contentOpf(book, chapterIds, assetPaths, cover, fontAssets.manifest),
       encoding: "utf8",
     },
     { path: "OEBPS/cover.xhtml", data: coverXhtml(book, cover.href), encoding: "utf8" },
     { path: "OEBPS/nav.xhtml", data: navXhtml(book), encoding: "utf8" },
-    { path: "OEBPS/style.css", data: styleCss(), encoding: "utf8" },
+    { path: "OEBPS/style.css", data: styleCss(book, fontAssets.faces), encoding: "utf8" },
     cover.asset,
   ];
 
@@ -505,12 +568,13 @@ export function bookToEpub(book: Book): EpubFile[] {
     });
   });
 
-  files.push(...assets);
+  files.push(...assets, ...fontAssets.files);
   return files;
 }
 
 export async function buildEpub(book: Book): Promise<Uint8Array> {
-  const files = bookToEpub(book);
+  const fontAssets = await loadFontAssets(book);
+  const files = bookToEpub(book, fontAssets);
   const buf = await invoke<ArrayBuffer>("package_epub", { files });
   return new Uint8Array(buf);
 }

src/export/exporters.ts

@@ -8,8 +8,8 @@ const PDF = [{ name: "PDF", extensions: ["pdf"] }];
 const EPUB = [{ name: "EPUB", extensions: ["epub"] }];
 
 export async function exportPdf(book: Book): Promise<void> {
-  const { source, images } = bookToPdfInputs(book);
-  const bytes = await compilePdf(source, images, true);
+  const { source, images, fonts } = bookToPdfInputs(book);
+  const bytes = await compilePdf(source, images, true, fonts);
   await saveBytes(bytes, `${book.metadata.title || "Untitled"}.pdf`, PDF);
 }
 

src/export/typst.ts

@@ -1,7 +1,18 @@
 import type { JSONContent } from "@tiptap/core";
-import { type Book, type FigurePlacement, type TrimSize, FIGURE_WIDTH, bodyNumber, chapterKind, isResizablePlacement } from "../model/book";
+import { type Book, type FigurePlacement, type TrimSize, FIGURE_WIDTH, bodyNumber, chapterKind, isResizablePlacement, partNumber, partRoman } from "../model/book";
+import { fontFamilyName, fontsUsed } from "../model/fonts";
 import type { ImageInput } from "../ipc";
 
+export interface PdfFonts {
+  bundled: string[];
+  system: string[];
+}
+
+function pdfFonts(book: Book): PdfFonts {
+  const used = fontsUsed(book.settings.fonts);
+  return { bundled: used.bundled.map((f) => f.id), system: used.system };
+}
+
 const TRIM: Record<TrimSize, { w: string; h: string }> = {
   "6x9": { w: "6in", h: "9in" },
   "5.5x8.5": { w: "5.5in", h: "8.5in" },
@@ -9,7 +20,7 @@ const TRIM: Record<TrimSize, { w: string; h: string }> = {
   a5: { w: "148mm", h: "210mm" },
 };
 
-const INLINE_SPECIAL = /[\\#$*_`<>@~[\]]/g;
+const INLINE_SPECIAL = /[\\#$*_`<>@~()[\]]/g;
 const LINE_SEPARATORS = /[\n\r\v\f\u2028\u2029]+/g;
 
 function esc(text: string): string {
@@ -26,6 +37,15 @@ function str(value: string): string {
   return JSON.stringify(value);
 }
 
+function localeParams(tag: string): string {
+  const parts = (tag || "en").trim().split(/[-_]/);
+  const primary = parts[0] ?? "";
+  const lang = /^[a-zA-Z]{2,3}$/.test(primary) ? primary.toLowerCase() : "en";
+  const region = parts.slice(1).find((p) => /^[a-zA-Z]{2}$/.test(p));
+  const params = `lang: ${str(lang)}`;
+  return region ? `${params}, region: ${str(region.toUpperCase())}` : params;
+}
+
 function inline(node: JSONContent, atLineStart: boolean): string {
   if (node.type === "text") {
     const marks = node.marks ?? [];
@@ -69,15 +89,22 @@ function figure(node: JSONContent, paths: Map<string, string>): string {
   return `#figure(image(${str(path)}, width: ${width}%)${caption}${float})`;
 }
 
+function aligned(align: unknown, body: string): string {
+  if (align === "center" || align === "right") return `#align(${align})[#set par(justify: false)\n${body}]`;
+  return body;
+}
+
 function block(node: JSONContent, paths: Map<string, string>): string {
   switch (node.type) {
     case "paragraph": {
       const body = inlines(node.content, true);
       if (!body.trim()) return "~";
+      const align = node.attrs?.align;
+      if (align === "center" || align === "right") return aligned(align, body);
       return node.attrs?.indent ? `#h(1.3em)${body}` : body;
     }
     case "heading":
-      return `#heading(level: ${node.attrs?.level ?? 2})[${inlines(node.content, true)}]`;
+      return aligned(node.attrs?.align, `#heading(level: ${node.attrs?.level ?? 2})[${inlines(node.content, true)}]`);
     case "blockquote":
       return `#blockquote[${(node.content ?? []).map((n) => block(n, paths)).join("\n\n")}]`;
     case "bulletList":
@@ -104,6 +131,8 @@ function preamble(book: Book): string {
   const trim = TRIM[book.settings.trim];
   const meta = book.metadata;
   const bleed = book.settings.bleed ? "0.125in" : "0in";
+  const body = fontFamilyName(book.settings.fonts.body);
+  const heading = fontFamilyName(book.settings.fonts.heading);
   return `#set document(title: ${str(meta.title || "Untitled")}, author: ${str(meta.author)})
 #set page(
   width: ${trim.w} + ${bleed},
@@ -111,9 +140,9 @@ function preamble(book: Book): string {
   margin: (inside: 0.875in, outside: 0.625in + ${bleed}, top: 0.8in + ${bleed}, bottom: 0.8in + ${bleed}),
   binding: left,
 )
-#set text(font: "Literata", size: 11pt, lang: ${str(meta.language || "en")}, hyphenate: true)
+#set text(font: ${str(body)}, size: 11pt, ${localeParams(meta.language)}, hyphenate: true)
 #set par(justify: true, leading: 0.72em, spacing: 0.72em)
-#show heading: set text(font: "Literata", weight: "medium")
+#show heading: set text(font: ${str(heading)}, weight: "medium")
 #show heading.where(level: 1): set text(size: 22pt)
 #show heading.where(level: 2): set block(above: 1.4em, below: 0.6em)
 #show heading.where(level: 3): set block(above: 1.2em, below: 0.5em)
@@ -125,10 +154,10 @@ function preamble(book: Book): string {
 #let titlepage(title, subtitle, author) = {
   v(2.4in)
   align(center)[
-    #text(font: "Literata", size: 30pt, weight: "medium")[#title]
+    #text(font: ${str(heading)}, size: 30pt, weight: "medium")[#title]
     #if subtitle != "" {
       v(0.6em)
-      text(font: "Literata", size: 15pt, style: "italic", fill: rgb("#6b6458"))[#subtitle]
+      text(font: ${str(body)}, size: 15pt, style: "italic", fill: rgb("#6b6458"))[#subtitle]
     }
     #if author != "" {
       v(1.7em)
@@ -140,7 +169,7 @@ function preamble(book: Book): string {
 #let openchapter(info) = {
   pagebreak(weak: true)
   [#metadata(info) <chap>]
-  v(2.1in)
+  if not info.nomargin { v(2.1in) }
   align(center)[
     #if info.kind == "body" {
       text(font: "Hanken Grotesk", size: 8.5pt, weight: "semibold", tracking: 0.28em)[#upper("Chapter " + info.num)]
@@ -153,6 +182,20 @@ function preamble(book: Book): string {
   v(1.5em)
 }
 
+#let openpart(info) = {
+  pagebreak(to: "odd", weak: true)
+  [#metadata(info) <chap>]
+  if not info.nomargin { v(3.1in) }
+  align(center)[
+    #text(font: "Hanken Grotesk", size: 10pt, weight: "semibold", tracking: 0.34em)[#upper("Part " + info.numeral)]
+    #if not info.notitle and info.title != "" {
+      v(0.85em)
+      heading(level: 1, numbering: none, outlined: info.toc)[#info.title]
+    }
+  ]
+  v(1.5em)
+}
+
 #let pageof(loc) = {
   let pat = loc.page-numbering()
   if pat == none { pat = "1" }
@@ -164,7 +207,7 @@ function preamble(book: Book): string {
   set par(justify: false, first-line-indent: 0pt)
   block(below: 2em)[
     #show heading: set block(above: 0pt, below: 0pt)
-    #heading(level: 1, numbering: none, outlined: false, bookmarked: true)[#text(font: "Literata", size: 24pt, weight: "medium")[Contents]]
+    #heading(level: 1, numbering: none, outlined: false, bookmarked: true)[#text(font: ${str(heading)}, size: 24pt, weight: "medium")[Contents]]
   ]
   context {
     let items = query(<chap>).filter(it => it.value.toc != false)
@@ -173,6 +216,7 @@ function preamble(book: Book): string {
       let info = it.value
       let pg = pageof(it.location())
       let body = info.kind == "body"
+      let part = info.kind == "part"
       let gap = if prev != none and prev != info.kind { 1.7em } else { 0.95em }
       prev = info.kind
       block(width: 100%, above: gap, below: 0.95em, {
@@ -182,7 +226,9 @@ function preamble(book: Book): string {
           column-gutter: (0.65em, 1em),
           align: (right + top, left + top, right + top),
           if body { info.num } else { [] },
-          if body { info.title } else { emph(info.title) },
+          if part {
+            strong(if info.title != "" { "Part " + info.numeral + ": " + info.title } else { "Part " + info.numeral })
+          } else if body { info.title } else { emph(info.title) },
           pg,
         )]
       })
@@ -200,13 +246,15 @@ function imageExtension(dataUrl: string): string {
 function coverBlock(book: Book, coverPath?: string): string {
   const c = book.cover;
   const meta = book.metadata;
+  const body = fontFamilyName(book.settings.fonts.body);
+  const heading = fontFamilyName(book.settings.fonts.heading);
 
   if (c.kind === "image" && coverPath) {
     return `#page(margin: 0pt, numbering: none)[#image(${str(coverPath)}, width: 100%, height: 100%, fit: "cover")]`;
   }
 
   const subtitle = meta.subtitle
-    ? `#v(0.55em)\n  #text(font: "Literata", size: 14pt, style: "italic")[${esc(meta.subtitle)}]`
+    ? `#v(0.55em)\n  #text(font: ${str(body)}, size: 14pt, style: "italic")[${esc(meta.subtitle)}]`
     : "";
   const author = meta.author
     ? `#v(1fr)\n  #text(font: "Hanken Grotesk", size: 11pt, weight: "semibold", tracking: 0.24em)[#upper[${esc(meta.author)}]]\n  #v(0.55in)`
@@ -216,7 +264,7 @@ function coverBlock(book: Book, coverPath?: string): string {
   #set align(center)
   #set text(fill: rgb(${str(c.ink)}))
   #v(1fr)
-  #text(font: "Literata", size: 30pt, weight: "medium")[${esc(meta.title || "Untitled")}]
+  #text(font: ${str(heading)}, size: 30pt, weight: "medium")[${esc(meta.title || "Untitled")}]
   #v(0.5em)
   #line(length: 16%, stroke: 0.6pt + rgb(${str(c.ink)}))
   ${subtitle}
@@ -297,18 +345,26 @@ function normTitle(title: string): string {
 
 function inToc(book: Book, index: number): boolean {
   const chapter = book.chapters[index];
-  if (chapter.noTitle && chapterKind(chapter) !== "body") return false;
+  const kind = chapterKind(chapter);
+  if (kind === "part") return true;
+  if (chapter.noTitle && kind !== "body") return false;
   const title = cleanTitle(chapter.title) || "Untitled";
-  return !(chapterKind(chapter) === "front" && normTitle(title) === normTitle(book.metadata.title));
+  return !(kind === "front" && normTitle(title) === normTitle(book.metadata.title));
 }
 
 function openerCall(book: Book, index: number): string {
   const chapter = book.chapters[index];
   const kind = chapterKind(chapter);
-  const num = kind === "body" ? String(bodyNumber(book.chapters, index)) : "";
   const notitle = !!chapter.noTitle;
+  const nomargin = !!chapter.noMargin;
+  if (kind === "part") {
+    const numeral = partRoman(partNumber(book.chapters, index) ?? 0);
+    const title = notitle ? "" : cleanTitle(chapter.title);
+    return `#openpart((kind: "part", numeral: ${str(numeral)}, title: ${str(title)}, notitle: ${notitle}, nomargin: ${nomargin}, toc: ${inToc(book, index)}))`;
+  }
+  const num = kind === "body" ? String(bodyNumber(book.chapters, index)) : "";
   const title = notitle ? "" : cleanTitle(chapter.title) || "Untitled";
-  return `#openchapter((kind: ${str(kind)}, num: ${str(num)}, title: ${str(title)}, notitle: ${notitle}, toc: ${inToc(book, index)}))`;
+  return `#openchapter((kind: ${str(kind)}, num: ${str(num)}, title: ${str(title)}, notitle: ${notitle}, nomargin: ${nomargin}, toc: ${inToc(book, index)}))`;
 }
 
 export function bookToTypst(book: Book, paths: Map<string, string> = new Map(), coverPath?: string): string {
@@ -320,13 +376,13 @@ export function bookToTypst(book: Book, paths: Map<string, string> = new Map(),
 #set page(numbering: "i")
 #counter(page).update(1)`;
 
-  const firstBody = book.chapters.findIndex((c) => chapterKind(c) === "body");
+  const firstMain = book.chapters.findIndex((c) => chapterKind(c) === "body" || chapterKind(c) === "part");
   const firstToc = book.chapters.findIndex((_, i) => inToc(book, i));
 
   const body = book.chapters
     .map((chapter, i) => {
       const toc = i === firstToc ? `#contents()\n\n` : "";
-      const reset = i === firstBody ? `#set page(numbering: "1")\n#counter(page).update(1)\n` : "";
+      const reset = i === firstMain ? `#set page(numbering: "1")\n#counter(page).update(1)\n` : "";
       return `${toc}${reset}${openerCall(book, i)}\n\n${chapterBody(chapter.content, paths)}`;
     })
     .join("\n\n");
@@ -334,16 +390,16 @@ export function bookToTypst(book: Book, paths: Map<string, string> = new Map(),
   return `${preamble(book)}\n\n${cover}\n\n${front}\n\n${body}\n`;
 }
 
-export function bookToPdfInputs(book: Book): { source: string; images: ImageInput[] } {
+export function bookToPdfInputs(book: Book): { source: string; images: ImageInput[]; fonts: PdfFonts } {
   const { images, paths } = extractImages(book);
   const coverPath = pushCoverImage(book, images);
-  return { source: bookToTypst(book, paths, coverPath), images };
+  return { source: bookToTypst(book, paths, coverPath), images, fonts: pdfFonts(book) };
 }
 
-export function coverToPdfInputs(book: Book): { source: string; images: ImageInput[] } {
+export function coverToPdfInputs(book: Book): { source: string; images: ImageInput[]; fonts: PdfFonts } {
   const images: ImageInput[] = [];
   const coverPath = pushCoverImage(book, images);
-  return { source: `${preamble(book)}\n\n${coverBlock(book, coverPath)}\n`, images };
+  return { source: `${preamble(book)}\n\n${coverBlock(book, coverPath)}\n`, images, fonts: pdfFonts(book) };
 }
 
 function chapterToTypst(book: Book, index: number, paths: Map<string, string>): string {
@@ -358,8 +414,8 @@ ${chapterBody(book.chapters[index].content, paths)}
 `;
 }
 
-export function chapterToPdfInputs(book: Book, index: number): { source: string; images: ImageInput[] } {
+export function chapterToPdfInputs(book: Book, index: number): { source: string; images: ImageInput[]; fonts: PdfFonts } {
   const chapter = book.chapters[index];
   const { images, paths } = collectImages([chapter.content]);
-  return { source: chapterToTypst(book, index, paths), images };
+  return { source: chapterToTypst(book, index, paths), images, fonts: pdfFonts(book) };
 }

src/import/epub.ts

@@ -1,7 +1,8 @@
 import { invoke } from "@tauri-apps/api/core";
 import { open } from "@tauri-apps/plugin-dialog";
 import type { JSONContent } from "@tiptap/core";
-import { type Book, type BookMetadata, type Chapter, type Cover, createCover } from "../model/book";
+import { type Book, type BookMetadata, type Chapter, type Cover, clampLanguage, createCover } from "../model/book";
+import { DEFAULT_FONTS } from "../model/fonts";
 
 export interface RawFile {
   path: string;
@@ -507,7 +508,7 @@ export function filesToBook(files: RawFile[], fallbackName = "Imported book"): B
     subtitle: "",
     author: localText(opf, "creator"),
     isbn: findIsbn(opf),
-    language: localText(opf, "language") || "en",
+    language: clampLanguage(localText(opf, "language") || "en"),
   };
 
   return {
@@ -515,7 +516,7 @@ export function filesToBook(files: RawFile[], fallbackName = "Imported book"): B
     id: crypto.randomUUID(),
     metadata,
     theme: "quiet-press",
-    settings: { trim: "6x9", bleed: true },
+    settings: { trim: "6x9", bleed: true, fonts: DEFAULT_FONTS },
     cover: findCover(opf, manifest, byPath),
     chapters,
   };

src/ipc.ts

@@ -7,11 +7,32 @@ export interface ImageInput {
   data: string;
 }
 
+export interface PdfFonts {
+  bundled: string[];
+  system: string[];
+}
+
 export async function compilePdf(
   source: string,
   images: ImageInput[] = [],
   emitWarnings = false,
+  fonts: PdfFonts = { bundled: [], system: [] },
 ): Promise<Uint8Array> {
-  const buffer = await invoke<ArrayBuffer>("compile_pdf", { source, images, emitWarnings });
+  const buffer = await invoke<ArrayBuffer>("compile_pdf", {
+    source,
+    images,
+    emitWarnings,
+    bundledFonts: fonts.bundled,
+    systemFonts: fonts.system,
+  });
   return new Uint8Array(buffer);
 }
+
+export async function listSystemFonts(): Promise<string[]> {
+  if (!isDesktop) return [];
+  try {
+    return await invoke<string[]>("list_system_fonts");
+  } catch {
+    return [];
+  }
+}

src/model/book.ts

@@ -1,4 +1,5 @@
 import type { JSONContent } from "@tiptap/core";
+import { type BookFonts, DEFAULT_FONTS } from "./fonts";
 
 export type TrimSize = "6x9" | "5.5x8.5" | "5x8" | "a5";
 export type FigurePlacement = "inline" | "full-width" | "full-page" | "float-top";
@@ -24,6 +25,7 @@ export interface BookMetadata {
 export interface BookSettings {
   trim: TrimSize;
   bleed: boolean;
+  fonts: BookFonts;
 }
 
 export type CoverKind = "default" | "image";
@@ -62,7 +64,7 @@ export function trimRatio(trim: TrimSize): number {
   return w / h;
 }
 
-export type ChapterKind = "front" | "body" | "back";
+export type ChapterKind = "front" | "body" | "part" | "back";
 
 export interface Chapter {
   id: string;
@@ -71,6 +73,7 @@ export interface Chapter {
   updatedAt: number;
   kind?: ChapterKind;
   noTitle?: boolean;
+  noMargin?: boolean;
 }
 
 export interface PageType {
@@ -105,6 +108,31 @@ export function bodyNumber(chapters: Chapter[], index: number): number | null {
   return n;
 }
 
+export function partNumber(chapters: Chapter[], index: number): number | null {
+  if (index < 0 || index >= chapters.length || chapterKind(chapters[index]) !== "part") return null;
+  let n = 0;
+  for (let i = 0; i <= index; i++) if (chapterKind(chapters[i]) === "part") n++;
+  return n;
+}
+
+const ROMAN: [number, string][] = [
+  [1000, "M"], [900, "CM"], [500, "D"], [400, "CD"], [100, "C"], [90, "XC"],
+  [50, "L"], [40, "XL"], [10, "X"], [9, "IX"], [5, "V"], [4, "IV"], [1, "I"],
+];
+
+export function partRoman(n: number): string {
+  if (n < 1) return String(n);
+  let num = n;
+  let out = "";
+  for (const [value, sym] of ROMAN) {
+    while (num >= value) {
+      out += sym;
+      num -= value;
+    }
+  }
+  return out;
+}
+
 export interface Book {
   schema: "margin/1";
   id: string;
@@ -139,6 +167,10 @@ export function createPage(group: "front" | "back", title: string): Chapter {
   return { id: crypto.randomUUID(), title, content: emptyDoc(), kind: group, updatedAt: Date.now() };
 }
 
+export function createPart(title = ""): Chapter {
+  return { id: crypto.randomUUID(), title, content: emptyDoc(), kind: "part", updatedAt: Date.now() };
+}
+
 export function cloneChapter(chapter: Chapter): Chapter {
   const title = chapter.noTitle || !chapter.title ? chapter.title : `${chapter.title} (copy)`;
   return { ...chapter, id: crypto.randomUUID(), title, content: structuredClone(chapter.content), updatedAt: Date.now() };
@@ -149,14 +181,22 @@ export function createCover(): Cover {
 }
 
 const DEFAULT_METADATA: BookMetadata = { title: "Untitled", subtitle: "", author: "", isbn: "", language: "en" };
-const DEFAULT_SETTINGS: BookSettings = { trim: "6x9", bleed: true };
+const DEFAULT_SETTINGS: BookSettings = { trim: "6x9", bleed: true, fonts: DEFAULT_FONTS };
+
+export const SUPPORTED_LANGUAGES = ["en", "es", "fr", "de", "it", "pt"] as const;
+
+export function clampLanguage(tag: string): string {
+  const primary = (tag || "").trim().split(/[-_]/)[0]?.toLowerCase() ?? "";
+  return (SUPPORTED_LANGUAGES as readonly string[]).includes(primary) ? primary : "en";
+}
 
 export function normalizeBook(book: Book): Book {
   const chapters = (Array.isArray(book.chapters) ? book.chapters : []).filter(Boolean);
+  const metadata = { ...DEFAULT_METADATA, ...book.metadata };
   return {
     ...book,
-    metadata: { ...DEFAULT_METADATA, ...book.metadata },
-    settings: { ...DEFAULT_SETTINGS, ...book.settings },
+    metadata: { ...metadata, language: clampLanguage(metadata.language) },
+    settings: { ...DEFAULT_SETTINGS, ...book.settings, fonts: { ...DEFAULT_FONTS, ...book.settings?.fonts } },
     cover: book.cover ? { ...createCover(), ...book.cover } : createCover(),
     chapters: (chapters.length ? chapters : [createChapter()]).map((c) =>
       c.updatedAt ? c : { ...c, updatedAt: Date.now() },

src/model/fonts.ts

@@ -0,0 +1,106 @@
+export type FontCategory = "serif" | "sans" | "display";
+
+export interface BundledFont {
+  id: string;
+  label: string;
+  family: string;
+  category: FontCategory;
+  regular: string;
+  italic?: string;
+  weight: string;
+}
+
+export const BUNDLED_FONTS: BundledFont[] = [
+  { id: "literata", label: "Literata", family: "Literata", category: "serif", regular: "Literata-VF.ttf", italic: "Literata-Italic-VF.ttf", weight: "200 900" },
+  { id: "eb-garamond", label: "EB Garamond", family: "EB Garamond", category: "serif", regular: "EBGaramond-VF.ttf", italic: "EBGaramond-Italic-VF.ttf", weight: "400 800" },
+  { id: "lora", label: "Lora", family: "Lora", category: "serif", regular: "Lora-VF.ttf", italic: "Lora-Italic-VF.ttf", weight: "400 700" },
+  { id: "source-serif", label: "Source Serif 4", family: "Source Serif 4", category: "serif", regular: "SourceSerif4-VF.ttf", italic: "SourceSerif4-Italic-VF.ttf", weight: "200 900" },
+  { id: "fraunces", label: "Fraunces", family: "Fraunces", category: "display", regular: "Fraunces-VF.ttf", italic: "Fraunces-Italic-VF.ttf", weight: "100 900" },
+  { id: "hanken", label: "Hanken Grotesk", family: "Hanken Grotesk", category: "sans", regular: "HankenGrotesk-VF.ttf", italic: "HankenGrotesk-Italic-VF.ttf", weight: "100 900" },
+];
+
+export type FontRef =
+  | { kind: "bundled"; id: string }
+  | { kind: "system"; family: string };
+
+export interface BookFonts {
+  body: FontRef;
+  heading: FontRef;
+}
+
+export interface FontPairing {
+  id: string;
+  label: string;
+  body: FontRef;
+  heading: FontRef;
+}
+
+const bundled = (id: string): FontRef => ({ kind: "bundled", id });
+
+export const FONT_PAIRINGS: FontPairing[] = [
+  { id: "quiet-press", label: "Quiet Press", body: bundled("literata"), heading: bundled("literata") },
+  { id: "classic", label: "Classic", body: bundled("eb-garamond"), heading: bundled("eb-garamond") },
+  { id: "editorial", label: "Editorial", body: bundled("source-serif"), heading: bundled("fraunces") },
+  { id: "modern", label: "Modern", body: bundled("lora"), heading: bundled("hanken") },
+  { id: "contrast", label: "Contrast", body: bundled("literata"), heading: bundled("hanken") },
+];
+
+export const DEFAULT_FONTS: BookFonts = { body: bundled("literata"), heading: bundled("literata") };
+
+const SERIF_FALLBACK = `Georgia, "Times New Roman", serif`;
+const SANS_FALLBACK = `ui-sans-serif, system-ui, -apple-system, sans-serif`;
+
+export function bundledFont(id: string): BundledFont | undefined {
+  return BUNDLED_FONTS.find((f) => f.id === id);
+}
+
+export function encodeRef(ref: FontRef): string {
+  return ref.kind === "bundled" ? `b:${ref.id}` : `s:${ref.family}`;
+}
+
+export function decodeRef(value: string): FontRef {
+  return value.startsWith("s:") ? { kind: "system", family: value.slice(2) } : { kind: "bundled", id: value.slice(2) };
+}
+
+export function fontFamilyName(ref: FontRef): string {
+  if (ref.kind === "system") return ref.family;
+  return bundledFont(ref.id)?.family ?? "Literata";
+}
+
+export function fontLabel(ref: FontRef): string {
+  if (ref.kind === "system") return ref.family;
+  return bundledFont(ref.id)?.label ?? ref.id;
+}
+
+export function fontStack(ref: FontRef): string {
+  if (ref.kind === "bundled") {
+    const font = bundledFont(ref.id);
+    if (!font) return SERIF_FALLBACK;
+    return `"${font.family}", ${font.category === "sans" ? SANS_FALLBACK : SERIF_FALLBACK}`;
+  }
+  return `"${ref.family}", ${SERIF_FALLBACK}`;
+}
+
+export function refsEqual(a: FontRef, b: FontRef): boolean {
+  if (a.kind !== b.kind) return false;
+  return a.kind === "bundled" ? a.id === (b as { id: string }).id : a.family === (b as { family: string }).family;
+}
+
+export function pairingFor(fonts: BookFonts): string | null {
+  const match = FONT_PAIRINGS.find((p) => refsEqual(p.body, fonts.body) && refsEqual(p.heading, fonts.heading));
+  return match?.id ?? null;
+}
+
+export function fontsUsed(fonts: BookFonts): { bundled: BundledFont[]; system: string[] } {
+  const usedBundled = new Map<string, BundledFont>();
+  const usedSystem = new Set<string>();
+  for (const ref of [fonts.body, fonts.heading]) {
+    if (ref.kind === "bundled") {
+      const font = bundledFont(ref.id);
+      if (font) usedBundled.set(font.id, font);
+    } else {
+      usedSystem.add(ref.family);
+    }
+  }
+  return { bundled: [...usedBundled.values()], system: [...usedSystem] };
+}

src/store/useBackup.ts

@@ -0,0 +1,156 @@
+import { create } from "zustand";
+import { openUrl } from "@tauri-apps/plugin-opener";
+import {
+  type BackupStatus,
+  gdriveBackup,
+  gdriveConnect,
+  gdriveDisconnect,
+  gdriveRestore,
+  gdriveStatus,
+} from "../backup";
+import { isDesktop } from "../ipc";
+import { useBook } from "./useBook";
+
+type Phase = "idle" | "connecting" | "working" | "error";
+
+interface BackupState {
+  connected: boolean;
+  email: string | null;
+  lastBackup: number | null;
+  pending: boolean;
+  phase: Phase;
+  error: string | null;
+  authUrl: string | null;
+  settingsOpen: boolean;
+  restoreNonce: number;
+  resolveConnect: ((ok: boolean) => void) | null;
+  apply: (status: BackupStatus) => void;
+  refresh: () => Promise<void>;
+  connect: () => Promise<boolean>;
+  cancelConnect: () => void;
+  handleAuthEvent: (ok: boolean, error: string | null) => Promise<void>;
+  openAuthUrl: () => void;
+  copyAuthUrl: () => Promise<void>;
+  disconnect: () => Promise<void>;
+  backup: (silent?: boolean) => Promise<void>;
+  restore: () => Promise<void>;
+  restoreFromDrive: () => Promise<void>;
+  openSettings: () => void;
+  closeSettings: () => void;
+}
+
+function notify(message: string) {
+  useBook.getState().setNotice(message);
+}
+
+export const useBackup = create<BackupState>((set, get) => ({
+  connected: false,
+  email: null,
+  lastBackup: null,
+  pending: false,
+  phase: "idle",
+  error: null,
+  authUrl: null,
+  settingsOpen: false,
+  restoreNonce: 0,
+  resolveConnect: null,
+  apply: (status) =>
+    set({
+      connected: status.connected,
+      email: status.email,
+      lastBackup: status.lastBackup,
+      pending: status.pending,
+    }),
+  refresh: async () => {
+    if (!isDesktop) return;
+    try {
+      get().apply(await gdriveStatus());
+    } catch {}
+  },
+  connect: () =>
+    new Promise<boolean>((resolve) => {
+      get().resolveConnect?.(false);
+      set({ phase: "connecting", error: null, authUrl: null, resolveConnect: resolve });
+      gdriveConnect()
+        .then((url) => set({ authUrl: url }))
+        .catch((e) => {
+          set({ phase: "error", error: String(e), resolveConnect: null });
+          notify(`Could not connect: ${e}`);
+          resolve(false);
+        });
+    }),
+  cancelConnect: () => {
+    const resolve = get().resolveConnect;
+    set({ phase: "idle", authUrl: null, resolveConnect: null });
+    resolve?.(false);
+  },
+  handleAuthEvent: async (ok, error) => {
+    if (get().phase !== "connecting") return;
+    const resolve = get().resolveConnect;
+    if (ok) {
+      await get().refresh();
+      set({ phase: "idle", authUrl: null, error: null, resolveConnect: null });
+      notify("Connected to Google Drive");
+    } else {
+      set({ phase: "error", authUrl: null, error: error ?? "authorization failed", resolveConnect: null });
+      notify(`Could not connect: ${error ?? "authorization failed"}`);
+    }
+    resolve?.(ok);
+  },
+  openAuthUrl: () => {
+    const url = get().authUrl;
+    if (url) openUrl(url).catch(() => {});
+  },
+  copyAuthUrl: async () => {
+    const url = get().authUrl;
+    if (!url) return;
+    try {
+      await navigator.clipboard.writeText(url);
+      notify("Authorization link copied");
+    } catch {
+      notify("Could not copy the link");
+    }
+  },
+  disconnect: async () => {
+    set({ phase: "working", error: null });
+    try {
+      get().apply(await gdriveDisconnect());
+      set({ phase: "idle" });
+      notify("Disconnected from Google Drive");
+    } catch (e) {
+      set({ phase: "error", error: String(e) });
+      notify(`Could not disconnect: ${e}`);
+    }
+  },
+  backup: async (silent = false) => {
+    if (!get().connected || get().phase === "working") return;
+    set({ phase: "working", error: null });
+    try {
+      const outcome = await gdriveBackup();
+      get().apply(outcome);
+      set({ phase: "idle" });
+      if (!silent) notify(outcome.uploaded > 0 ? "Backed up to Google Drive" : "Nothing new to back up");
+    } catch (e) {
+      set({ phase: "error", error: String(e) });
+      if (!silent) notify(`Backup failed: ${e}`);
+    }
+  },
+  restore: async () => {
+    set({ phase: "working", error: null });
+    try {
+      const result = await gdriveRestore();
+      await get().refresh();
+      set((s) => ({ phase: "idle", restoreNonce: s.restoreNonce + 1 }));
+      notify(result.restored > 0 ? `Restored ${result.restored} file${result.restored === 1 ? "" : "s"}` : "No backups found in Google Drive");
+    } catch (e) {
+      set({ phase: "error", error: String(e) });
+      notify(`Restore failed: ${e}`);
+    }
+  },
+  restoreFromDrive: async () => {
+    const ok = get().connected || (await get().connect());
+    if (ok) await get().restore();
+  },
+  openSettings: () => set({ settingsOpen: true }),
+  closeSettings: () => set({ settingsOpen: false }),
+}));

src/store/useBook.ts

@@ -10,10 +10,12 @@ import {
   cloneChapter,
   createChapter,
   createPage,
+  createPart,
   normalizeBook,
 } from "../model/book";
 import { loadActiveChapter, saveActiveChapter } from "../editor/positions";
 import { saveBook } from "../library";
+import { applyBookFonts, resetBookFonts } from "../book-style";
 
 export const COVER_ID = "__cover__";
 
@@ -28,11 +30,14 @@ interface BookState {
   openBook: (book: Book) => void;
   closeBook: () => void;
   setActiveChapter: (id: string) => void;
+  goToAdjacentChapter: (dir: 1 | -1) => void;
   setChapterContent: (id: string, content: JSONContent) => void;
   setChapterTitle: (id: string, title: string) => void;
   setChapterNoTitle: (id: string, noTitle: boolean) => void;
+  setChapterNoMargin: (id: string, noMargin: boolean) => void;
   addChapter: () => void;
   addPage: (group: "front" | "back", title: string) => void;
+  addPart: () => void;
   duplicateChapter: (id: string) => void;
   deleteChapter: (id: string) => void;
   moveChapter: (from: number, to: number, toKind?: ChapterKind) => void;
@@ -60,13 +65,24 @@ export const useBook = create<BookState>((set, get) => ({
     const saved = loadActiveChapter(normalized.id);
     const valid = saved === COVER_ID || normalized.chapters.some((c) => c.id === saved);
     const activeChapterId = valid ? (saved as string) : normalized.chapters[0]?.id ?? "";
+    applyBookFonts(normalized.settings.fonts);
     set({ book: normalized, activeChapterId, dirty: false });
   },
   closeBook: () => {
     flushOutgoing(get().book, get().dirty);
+    resetBookFonts();
     set({ book: null, activeChapterId: "", dirty: false });
   },
   setActiveChapter: (id) => set({ activeChapterId: id }),
+  goToAdjacentChapter: (dir) => {
+    const { book, activeChapterId } = get();
+    if (!book) return;
+    const ids = [COVER_ID, ...book.chapters.map((c) => c.id)];
+    const i = ids.indexOf(activeChapterId);
+    if (i === -1) return;
+    const next = ids[(i + dir + ids.length) % ids.length];
+    if (next !== activeChapterId) set({ activeChapterId: next });
+  },
   setChapterContent: (id, content) =>
     set((s) =>
       s.book
@@ -82,7 +98,13 @@ export const useBook = create<BookState>((set, get) => ({
   setChapterNoTitle: (id, noTitle) =>
     set((s) =>
       s.book
-        ? { dirty: true, book: { ...s.book, chapters: s.book.chapters.map((c) => (c.id === id ? { ...c, noTitle, title: noTitle ? "" : c.title, updatedAt: Date.now() } : c)) } }
+        ? { dirty: true, book: { ...s.book, chapters: s.book.chapters.map((c) => (c.id === id ? { ...c, noTitle, updatedAt: Date.now() } : c)) } }
+        : {}
+    ),
+  setChapterNoMargin: (id, noMargin) =>
+    set((s) =>
+      s.book
+        ? { dirty: true, book: { ...s.book, chapters: s.book.chapters.map((c) => (c.id === id ? { ...c, noMargin, updatedAt: Date.now() } : c)) } }
         : {}
     ),
   addChapter: () =>
@@ -104,6 +126,18 @@ export const useBook = create<BookState>((set, get) => ({
       chapters.splice(insertAt, 0, page);
       return { activeChapterId: page.id, dirty: true, book: { ...s.book, chapters } };
     }),
+  addPart: () =>
+    set((s) => {
+      if (!s.book) return {};
+      const part = createPart();
+      const chapters = [...s.book.chapters];
+      const bodyEnd = chapters.length - chapters.filter((c) => chapterKind(c) === "back").length;
+      const activeIdx = chapters.findIndex((c) => c.id === s.activeChapterId);
+      const activeKind = activeIdx >= 0 ? chapterKind(chapters[activeIdx]) : null;
+      const insertAt = activeKind === "body" || activeKind === "part" ? activeIdx + 1 : bodyEnd;
+      chapters.splice(insertAt, 0, part);
+      return { activeChapterId: part.id, dirty: true, book: { ...s.book, chapters } };
+    }),
   duplicateChapter: (id) =>
     set((s) => {
       if (!s.book) return {};
@@ -130,7 +164,7 @@ export const useBook = create<BookState>((set, get) => ({
       const chapters = [...s.book.chapters];
       if (from < 0 || from >= chapters.length) return {};
       const target = chapters[from];
-      const nextKind = toKind ?? chapterKind(target);
+      const nextKind = chapterKind(target) === "part" ? "part" : toKind ?? chapterKind(target);
       const dest = Math.max(0, Math.min(from < to ? to - 1 : to, chapters.length - 1));
       if (from === dest && chapterKind(target) === nextKind) return {};
       const [moved] = chapters.splice(from, 1);
@@ -140,7 +174,12 @@ export const useBook = create<BookState>((set, get) => ({
   setMetadata: (patch) =>
     set((s) => (s.book ? { dirty: true, book: { ...s.book, metadata: { ...s.book.metadata, ...patch } } } : {})),
   setSettings: (patch) =>
-    set((s) => (s.book ? { dirty: true, book: { ...s.book, settings: { ...s.book.settings, ...patch } } } : {})),
+    set((s) => {
+      if (!s.book) return {};
+      const book = { ...s.book, settings: { ...s.book.settings, ...patch } };
+      if (patch.fonts) applyBookFonts(book.settings.fonts);
+      return { dirty: true, book };
+    }),
   setCover: (patch) =>
     set((s) => (s.book ? { dirty: true, book: { ...s.book, cover: { ...s.book.cover, ...patch } } } : {})),
   markSaved: () => set({ dirty: false }),