docs: add .claude-done summary for rename-note-tab

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.claude-done

@@ -0,0 +1,35 @@
+# Rename Note Tab — Done Summary
+
+## What was built
+Double-click a tab title to rename the note. The tab shows an inline text input (Enter saves, Escape cancels). Renaming updates the note's title, filename, H1 heading, frontmatter `title:` field, and all wiki links (`[[OldName]]` → `[[NewName]]`) across the entire vault.
+
+## Commits on `task/rename-note-tab`
+1. `caa26b6` — design: rename-note-tab wireframes (`design/rename-note-tab.pen`)
+2. `68dfab4` — feat: add `rename_note` Tauri command with wiki link updates (Rust backend)
+3. `5a8eb6a` — feat: rename note via double-click on tab — frontend wiring
+4. `ee00c2c` — test: Playwright e2e tests for rename tab feature
+
+## Architecture decisions
+- **Slug generation**: title → lowercase, non-alphanumeric chars replaced with hyphens, leading/trailing hyphens stripped. Same logic in Rust backend and TypeScript mock.
+- **Wiki link matching**: regex matches both title-based (`[[Old Title]]`) and path-stem-based (`[[note/old-title]]`) references, preserving pipe aliases (`[[Old Title|display]]` → `[[New Title|display]]`).
+- **State flow**: `onRenameTab` flows from TabBar → Editor → App → `useNoteActions.handleRenameNote` → Tauri backend → `useVaultLoader.replaceEntry` (updates entries + allContent atomically).
+- **H1 + frontmatter**: The rename updates both the first `# Heading` line and the `title:` frontmatter field if present.
+- **Toast feedback**: Shows "Renamed" or "Renamed — updated N wiki links" on success, "Failed to rename note" on error.
+
+## Code health
+- **TabBar.tsx**: Improved from CC 23→18 by extracting `TabItem` component and `tabStyle` helper.
+- **Rust `vault.rs`**: Passed code health after extracting helpers (`build_wikilink_pattern`, `WikilinkReplacement` struct, `collect_md_files`, etc.) to keep CC under thresholds.
+- **useNoteActions.ts**: Pre-existing CC=37 (threshold 9) increased to 42. Extracted `performRename` and `buildRenamedEntry` as module-level functions. Proper fix requires splitting the monolithic hook (separate concern).
+- **App.tsx / useVaultLoader.ts**: Minor LOC/CC increases on already-above-threshold functions.
+
+## Test results
+- `pnpm test` — 119/119 passed
+- `cargo test` — 147/147 passed (including 7 new rename tests)
+- `npx vite build` — success
+- Playwright e2e — 2/2 rename-tab tests pass
+
+## Visual verification
+Tested on `localhost:5173` via Playwright:
+- Double-click → inline input appears with current title selected
+- Type new name → Enter → tab title updates, note list updates, breadcrumb updates, toast shows "Renamed"
+- Double-click → type → Escape → title reverts, no changes made