chore(release): v0.1.13

NSSpellChecker's implicit URL handling is unreliable for URLs alone on a
line (a bookmark list), flagging the whole URL as one misspelling. Request
the link checking type alongside spelling so the data detector claims URL
ranges, then keep only spelling results. Real misspellings are unaffected.

.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).
+Write your book. Own every word. A calm, offline studio to write, format, and publish your book to every store and to print.
-
-## 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).

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": "0.1.4",
+  "version": "0.1.13",
   "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 = "0.1.11"
 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 = "0.1.4"
+version = "0.1.13"
 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",
+    "dialog:default"
-    "updater:default",
-    "process:allow-restart"
   ]
 }

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

@@ -1,12 +1,19 @@
 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")
@@ -60,29 +67,46 @@ 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_dialog::init());
-        .plugin(tauri_plugin_process::init());
 
-    if context.config().plugins.0.contains_key("updater") {
+    #[cfg(desktop)]
-        builder = builder.plugin(tauri_plugin_updater::Builder::new().build());
+    {
+        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" | "export-pdf" | "export-epub" | "check-updates"
+                ) {
+                    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 +116,13 @@ 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> {
+pub(crate) fn app_data_dir(app: &tauri::AppHandle) -> Result<PathBuf, String> {
-    let dir = app
+    let dir = app.path().app_data_dir().map_err(|e| e.to_string())?;
-        .path()
+    fs::create_dir_all(&dir).map_err(|e| e.to_string())?;
-        .app_data_dir()
+    Ok(dir)
-        .map_err(|e| e.to_string())?
+}
-        .join("library");
+
+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() {
+            #[cfg(target_os = "macos")]
-                engine.speller = Some(build_speller(&app)?);
+            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",
+  "productName": "Margin",
-  "version": "0.1.4",
+  "version": "0.1.13",
   "identifier": "studio.margin.app",
   "build": {
     "beforeDevCommand": "pnpm dev",

src/App.tsx

@@ -3,7 +3,11 @@ import { listen } from "@tauri-apps/api/event";
 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 { 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";
@@ -19,7 +23,9 @@ 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);
     });
@@ -37,9 +43,16 @@ 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 +60,35 @@ 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 />}
+    </>
+  );
 }
 
 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);
+      const { source, images, fonts } = coverActive ? coverToPdfInputs(book) : chapterToPdfInputs(book, idx);
-      compilePdf(source, images)
+      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 +1,11 @@
-import { useCallback, useEffect, useState } from "react";
+import { useCallback, useEffect, useLayoutEffect, useRef, useState } from "react";
 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 +13,16 @@ 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 +42,16 @@ 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 +66,38 @@ 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 +116,7 @@ export function EditorView() {
     saveBook(current)
       .then(() => {
         if (useBook.getState().book === current) markSaved();
+        useBackup.getState().refresh();
       })
       .catch((e) => setNotice(`Save failed: ${e}`));
   }, [markSaved, setNotice]);
@@ -97,11 +135,36 @@ export function EditorView() {
       } else if ((e.metaKey || e.ctrlKey) && e.key.toLowerCase() === "f") {
         e.preventDefault();
         openFind(e.altKey);
+      } else if (e.metaKey && e.altKey && (e.key === "ArrowDown" || e.key === "ArrowRight")) {
+        e.preventDefault();
+        e.stopPropagation();
+        switchChapter(1);
+      } else if (e.metaKey && e.altKey && (e.key === "ArrowUp" || 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);
+  }, [saveNow, openFind, switchChapter]);
+
+  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 +172,11 @@ 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 +212,45 @@ 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 activeIdx = book.chapters.findIndex((c) => c.id === activeChapterId);
-  const chapter = book.chapters[idx] ?? book.chapters[0];
+  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 +260,120 @@ export function EditorView() {
               </button>
             </>
           )}
-          <div className="menu-wrap">
+          {!isCompact && (
-            <button className="icon-btn" data-on={widthOpen} onClick={() => setWidthOpen((v) => !v)} title="Editor width">
+            <div className="menu-wrap">
-              <Icon d="M3 5v14M21 5v14M7 12h10M7 12l3-3M7 12l3 3M17 12l-3-3M17 12l-3 3" />
+              <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 && (
+          )}
-              <>
+          <button className="icon-btn" data-on={dock} onClick={toggleDock} title="Toggle preview">
-                <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">
             <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 +385,55 @@ export function EditorView() {
       />
 
       <div className="body">
-        <Sidebar />
+        <Sidebar
-        <ResizeHandle pane="sidebar" />
+          onNavigate={() => {
+            if (isCompact) setSidebarOpen(false);
+            focusEditorSoon();
+          }}
+        />
+        {sidebarOpen && !isCompact && <ResizeHandle pane="sidebar" />}
         <main className="editor-pane">
-          {coverActive ? (
+          {coverActive && <CoverView />}
-            <CoverView />
+          <article className="sheet" hidden={coverActive}>
-          ) : (
+            <header className="chapter-opener">
-            <>
+              <div className="chapter-num">{eyebrow}</div>
-              <article className="sheet">
+              <ChapterTitleInput
-                <header className="chapter-opener">
+                value={chapter.title}
-                  <div className="chapter-num">{eyebrow}</div>
+                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"
+                    type="checkbox"
-                    value={chapter.noTitle ? "" : chapter.title}
+                    checked={!!chapter.noTitle}
-                    placeholder={chapter.noTitle ? "No title" : kind === "body" ? "Chapter title" : "Page title"}
+                    onChange={(e) => setChapterNoTitle(chapter.id, e.target.checked)}
-                    spellCheck={false}
-                    disabled={chapter.noTitle}
-                    onChange={(e) => setChapterTitle(chapter.id, e.target.value)}
                   />
-                  {(chapter.noTitle || !chapter.title.trim()) && (
+                  No title
-                    <label className="no-title-check">
+                </label>
-                      <input
+              )}
-                        type="checkbox"
+            </header>
-                        checked={!!chapter.noTitle}
+            <Editor
-                        onChange={(e) => setChapterNoTitle(chapter.id, e.target.checked)}
+              bookId={book.id}
-                      />
+              chapterId={chapter.id}
-                      No title
+              content={chapter.content}
-                    </label>
+              onChange={(content) => setChapterContent(chapter.id, content)}
-                  )}
+              onReady={setEditor}
-                </header>
+              onContentError={() =>
-                <Editor
+                setNotice("This chapter contains content Margin couldn't fully read; editing may drop the unrecognized parts.")
-                  key={chapter.id}
+              }
-                  bookId={book.id}
+            />
-                  chapterId={chapter.id}
+          </article>
-                  content={chapter.content}
+          {!coverActive && <FloatingToolbar editor={editor} />}
-                  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} />
-            </>
-          )}
         </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 +473,38 @@ 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
+                      {isPart && <span className="part-eyebrow">Part {partRoman(row.part ?? 0)}</span>}
-                        className="title"
+                      {(!isPart || row.chapter.title) && (
-                        onMouseEnter={(e) => {
+                        <span
-                          const el = e.currentTarget;
+                          className="title"
-                          if (el.scrollWidth > el.clientWidth) el.title = row.chapter.title || "Untitled";
+                          onMouseEnter={(e) => {
-                          else el.removeAttribute("title");
+                            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.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/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(() => {
+  const scrollerOf = (ed: TiptapEditor) => ed.view.dom.closest(".editor-pane") as HTMLElement | null;
-    onReady(editor);
+
-    return () => onReady(null);
+  const restorePosition = (ed: TiptapEditor, id: string, focus: boolean) => {
-  }, [editor, onReady]);
+    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;
+    cache.current.set(chapterId, { state: editor.view.state, content, scroll: 0 });
-    const scroller = editor.view.dom.closest(".editor-pane") as HTMLElement | null;
+    activeId.current = chapterId;
-
+    restorePosition(editor, chapterId, true);
-    const saved = loadPosition(bookId, chapterId);
+    onReady(editor);
-    const size = editor.state.doc.content.size;
+    return () => onReady(null);
-    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;
-    };
     // 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"' : ""}>${body}</p>`;
     }
-    case "heading":
+    case "heading": {
-      return node.attrs?.level === 3
+      const tag = node.attrs?.level === 3 ? "h3" : "h2";
-        ? `<h3>${inlines(node.content)}</h3>`
+      return `<${tag}${alignStyle(node.attrs?.align)}>${inlines(node.content)}</${tag}>`;
-        : `<h2>${inlines(node.content)}</h2>`;
+    }
     case "blockquote":
       return `<blockquote>${(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"/>`,
+    ...fontManifest,
-    `<item id="font-italic" href="fonts/Literata-Italic-VF.ttf" media-type="font/ttf"/>`,
   ];
   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 kind = chapterKind(chapter);
-      const fallback = chapterKind(chapter) === "body" ? `Chapter ${bodyNumber(book.chapters, i)}` : "Untitled";
+      if (chapter.noTitle && kind !== "body" && kind !== "part") return "";
-      const label = chapter.noTitle ? fallback : chapter.title || fallback;
+      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 partLabel = `Part ${partRoman(partNumber(book.chapters, index) ?? 0)}`;
-  const eyebrow = kind === "body" ? `<p class="eyebrow">Chapter ${num}</p>` : "";
+  const eyebrow =
-  const heading = chapter.noTitle ? "" : `<h1>${esc(title)}</h1>`;
+    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 {
+function styleCss(book: Book, faces: string): string {
-  return `@font-face {
+  return `${faces ? faces + "\n\n" : ""}html {
-  font-family: "Literata";
+  font-family: ${fontStack(book.settings.fonts.body)};
-  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;
 }
 
 .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 { source, images, fonts } = bookToPdfInputs(book);
-  const bytes = await compilePdf(source, images, true);
+  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" },
@@ -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 },
+    metadata: { ...metadata, language: clampLanguage(metadata.language) },
-    settings: { ...DEFAULT_SETTINGS, ...book.settings },
+    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 }),

src/store/useExportPreview.ts

@@ -0,0 +1,13 @@
+import { create } from "zustand";
+
+interface ExportPreviewState {
+  open: boolean;
+  openPreview: () => void;
+  close: () => void;
+}
+
+export const useExportPreview = create<ExportPreviewState>((set) => ({
+  open: false,
+  openPreview: () => set({ open: true }),
+  close: () => set({ open: false }),
+}));