replay ui fix (#56)

* refactor: rename inspect to replay across the codebase

Renames inspect-ui/ to replay-ui/, internal/inspect/ to internal/replay/,
the CLI subcommand from `sanderling inspect` to `sanderling replay`, and
updates all references in docs, Makefile, README, and Go comments.

* feat(replay-ui): show spec filename with full path on hover

RunList and RunDetail now render the basename of spec_path (e.g.
login.spec.ts) with the full path available as a title tooltip.

docs/manual/replay.md

@@ -0,0 +1,62 @@
+---
+title: sanderling replay
+---
+
+# sanderling replay
+
+Local web UI for exploring runs produced by `sanderling test`. Reads `runs/<id>/meta.json` and `runs/<id>/trace.jsonl` from disk.
+
+```
+sanderling replay [run-or-runs-dir] [--port N] [--no-open] [--dev]
+```
+
+The positional argument can be a runs directory or a single run directory (auto-detected by `meta.json`). Defaults to `./runs`.
+
+![sanderling replay](../../_assets/replay-ui.png)
+
+## Panels
+
+| Panel | What it shows |
+|---|---|
+| Screenshot | Device screenshot for the focused step, with the dispatched action's target spotlit. |
+| ActionList | Ordered list of steps with the verb and target for each action. |
+| Timeline | Per-property lane chart over the run; cells coloured by violated, pending, or holds. |
+| ViolationsPanel | Property statuses at the focused step with residual formulas for any that failed. |
+| HierarchyPanel | Filterable table of every UI element captured at the focused step; mirrors the selectors documented in [Spec language reference](./spec-language/). |
+| SnapshotTable | Flattened `snapshots` map for the focused step, with diffs against the previous step. |
+| MetricsChart | Heap and other host-side metrics sampled per step. |
+| ExceptionsPanel | Uncaught exceptions captured during the run, with a jump-to-first control. |
+
+## Keyboard shortcuts
+
+| Key | Action |
+|---|---|
+| `j`, `Right` | Next step |
+| `k`, `Left` | Previous step |
+| `Shift+j`, `Shift+Right` | Jump 10 forward |
+| `Shift+k`, `Shift+Left` | Jump 10 back |
+| `g` / `G` | First / last step |
+| `.` | Next step with a violation |
+
+Arrow keys inside a tablist or listbox yield to those widgets. Use `j`/`k` when focus is on one.
+
+## Deep links
+
+`/runs/:id/steps/:n` links to a specific step. Use it in issues or PRs when pointing at a violation.
+
+The run index auto-refreshes over SSE as new runs land, so `sanderling replay` and `sanderling test` can run side by side.
+
+## Development
+
+Two-process loop while iterating on the UI:
+
+```
+make web-dev     # bun + vite on http://127.0.0.1:5173
+make replay-dev  # sanderling replay --dev, proxies non-API to 5173
+```
+
+Single binary with the bundle embedded:
+
+```
+make sanderling
+```