Introduces a new code review feature that displays git diffs with
interactive line/range annotations using @pierre/diffs library.

New packages:
- apps/review/ - Review app with server entry point and Vite build
- packages/review-editor/ - React UI with DiffViewer, ReviewPanel, FileTree
- packages/server/review.ts - Review server with /api/diff and /api/feedback

Features:
- Split/unified diff view toggle
- Line selection and range selection for annotations
- Comment, suggestion, and concern annotation types
- Hover utility (+ button) for quick single-line comments
- Multi-file navigation with j/k keyboard shortcuts
- Export feedback as structured markdown
- Copy diff to clipboard

Usage:
  bun apps/review/server/index.ts              # Unstaged changes
  bun apps/review/server/index.ts --staged     # Staged changes
  bun apps/review/server/index.ts main         # Diff against ref

Co-Authored-By: Claude Opus 4.5 <[email protected]>

Header:
- Rebrand to "Plannotator" with "Code Review" badge
- Add version link to GitHub releases
- Add Copy Raw Diffs and Copy Feedback action buttons
- Add Settings placeholder and panel toggle
- Remove API mode (no hooks/approval flow)

Sidebar (ReviewPanel):
- Match Plannotator styling (w-72, backdrop-blur, uppercase header)
- Add author display with "(me)" suffix
- Add empty state icon
- Standardize timestamp format
- Add Quick Copy Feedback footer
- Remove floating toggle (header controlled)

FileTree:
- More compact layout, system font
- Add viewed indicator (eyeball icon)
- Move keyboard nav hint to footer
- Annotation count before diff stats

Other:
- Per-file Copy Diff button with feedback
- Inline comment styling improvements
- Extract demo data to separate file
- No annotations dialog for Copy Feedback

Co-Authored-By: Claude Opus 4.5 <[email protected]>

- Add /plannotator-review command to OpenCode plugin
- Event listener intercepts command and launches review server
- Add completion overlay after sending feedback (matches plan mode)
- Add agent switching support for review feedback routing
- Add Settings component with identity and agent switching options
- Update server to accept/return agentSwitch in /api/feedback

Build & Test:
- Add review-editor.html to gitignore (build artifact)
- Update package.json build script to copy both HTML files
- Add postinstall script to copy command files
- Add sandbox-opencode.sh for local plugin testing
- Add test-opencode-review.sh and test-review-server.ts

Co-Authored-By: Claude Opus 4.5 <[email protected]>

The OpenCode bus wraps all event data in a properties object,
so sessionID must be accessed via event.properties.sessionID
rather than directly from the event object.

Co-Authored-By: Claude Opus 4.5 <[email protected]>

Add /plannotator-review slash command for Claude Code users:

- Add `review` subcommand to plannotator binary
  - Runs git diff, opens review UI, outputs feedback to stdout
- Create slash command that captures feedback via !`plannotator review`
- Update install scripts to install command to ~/.claude/commands/
- Add "claude-code" origin support to review server and UI
- Update release workflow to build review UI before hook

Users can now run /plannotator-review in Claude Code to open the
interactive code review UI and send annotated feedback back to Claude.

Co-Authored-By: Claude Opus 4.5 <[email protected]>

Plan Review:
- Change "Deny with Feedback" to "Send Feedback" (friendlier wording per #56)

Code Review:
- Add two-button pattern: "Send Feedback" (accent) + "Approve" (green)
- Send Feedback disabled when no annotations
- Approve button dims when annotations exist
- Add warning dialog when approving with annotations
- Add hover tooltip explaining annotations won't be sent
- Show different completion messages for approve vs feedback
- Support both OpenCode and Claude Code origins

Co-Authored-By: Claude Opus 4.5 <[email protected]>

- Add `mode` prop to Settings component ('plan' | 'review')
- In review mode, only show Identity and Agent Switching
- Hide plan-specific settings: Plan Saving, Tater Mode, Obsidian, Bear
- Pass mode="review" from code review editor

Co-Authored-By: Claude Opus 4.5 <[email protected]>

Remove the two-hop annotation flow (select lines → choose type → input).
Now matches GitHub's UX: select lines → comment box appears immediately.

- Remove type selection menu (comment/suggestion/concern)
- Direct comment input when lines are selected
- Optional "Add suggested code" expansion
- Remove type badges from annotation display
- Simplify export format (no type labels)
- Add keyboard shortcuts (Cmd+Enter submit, Escape cancel)

The AI understands intent from natural language - no need to pre-categorize.

Co-Authored-By: Claude Opus 4.5 <[email protected]>

Only attempt to send feedback to session if sessionID is available.
Prevents "undefined is not an object (evaluating 'agent.name')" error
when the event structure doesn't include a sessionID.

Co-Authored-By: Claude Opus 4.5 <[email protected]>

- Add code review flow and review server API
- Update project structure with review-related files
- Add dev:review and build:review/opencode to development scripts
- Fix OpenCode plugin review mode to capture stderr and use noReply flag

Co-Authored-By: Claude Opus 4.5 <[email protected]>

- Add FEATURE_HIGHLIGHTS for version-specific announcements (0.5.0: Code Review)
- Expanded banner UI for milestone releases with feature title/description
- OpenCode-specific cache clear instructions when origin is opencode
- Debug params: ?preview-update=X.X.X and ?preview-origin=opencode for testing

Co-Authored-By: Claude Opus 4.5 <[email protected]>

- Add centralized git utilities module (packages/server/git.ts)
- Dropdown to switch between diff views: uncommitted, last commit, vs main
- Dynamic default branch detection (main/master)
- Empty state UI when no changes to display
- Fix line range display for bottom-to-top selections

Co-Authored-By: Claude Opus 4.5 <[email protected]>