- Zoom centers on mouse cursor position (scroll adjustment)
- Two-phase render: instant CSS transform + debounced canvas re-render
- No blank flash: old canvases kept until new render completes atomically
- No bounce-back: track renderedScale separately from renderScale
- Inner wrapper div for CSS transform (container stays as scroll viewport)

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

- synctex.gz CDN returns 503; use Overleaf web proxy URL with session cookie
- Normalize synctex paths (collapse /./ segments)
- Pass session cookie to all compile artifact downloads
- Smooth editor zoom: continuous delta, debounced remeasure

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

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

- Exclude CLAUDE.md from sync (move to .claude/ dotfile dir, clean up root copy)
- Add Ctrl+wheel font zoom for editor (capture phase, disable Electron built-in zoom)
- Load cached PDF on project connect (avoid recompile to see last PDF)
- Add synctex debug logging for PDF↔source navigation troubleshooting
- Fix .claude/ dir creation order (mkdir before write)

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

New MCP tools for agents to debug LaTeX compilation:
- get_compile_errors: parsed errors with file paths and line numbers
- get_compile_warnings: parsed warnings with locations
- get_compile_log: full raw log with optional tail parameter
- compile_latex: improved to fetch log via CDN URL, return error summary

Log parsing uses the same Overleaf-style parser as the PdfViewer component.
Updated CLAUDE.md template with compile-debug workflow documentation.

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

The root cause of server compile failures was that output.pdf was being
saved into the synced project directory, causing FileSyncBridge to upload
it back to Overleaf as a project file. CLSI then failed because it found
an existing output.pdf blocking its compilation output.

Changes:
- Save compile artifacts (PDF, synctex.gz) to .build/ subdirectory instead
  of the synced project root — .build is a dotfile dir ignored by chokidar
- Add pdf/pdfxref/stderr/stdout/chktex to FileSyncBridge ignore patterns
- Add rootResourcePath to compile request body (matches Overleaf web client)
- Implement PDF download with fallback via direct build ID URL construction
- Add server compile handler, compile dropdown menu, PDF save button
- Fix resolved comment highlight flash on startup (null initial state)
- Fix EPIPE crash on startup when stdout/stderr is closed
- Fix synctex inverse search to use relative paths via OT doc join

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

- Fix Socket.IO v0.9 ack parser to handle acks without data (6:::N format),
  fixing comment creation stuck at "sending"
- Rewrite comment sync to use local state updates from socket events
  (new-comment, resolve-thread, reopen-thread, delete-thread, edit-message,
  delete-message) instead of REST re-fetches — instant UI updates
- Optimistic updates for all comment actions (resolve, reopen, delete, reply, edit)
- Fetch threads + contexts on project connect so editor highlights are correct
  from startup, not only when review panel is opened
- Add comment context to store immediately after creation for instant highlight
- Rename MCP server from overleaf-comments to lattex, add 6 new tools:
  reopen_comment, delete_comment, get_chat_messages, send_chat_message,
  list_project_files, compile_latex — all auto-granted permissions
- Refactor terminal from fixed Terminal/Claude tabs to dynamic multi-tab with
  bottom tab bar and unlimited new terminal creation
- Fix chat panel layout overflow pushing other components

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

- Sync new local files (created by Claude Code etc.) to Overleaf via REST API
- Create intermediate folders as needed, handle both text docs and binaries
- Scan for orphaned files on startup that weren't synced previously
- Add "Copy Comments" quick action: copies unresolved comments for current file
  to clipboard with line numbers, context, author names, and timestamps
- Filter comments to active file only, exclude resolved threads

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

- Add missing PTY environment variables (TERM, COLORTERM, LANG, TERM_PROGRAM)
- Strip DEC 2026 synchronized output sequences that cause xterm.js to buffer
  indefinitely when begin/end markers are split across PTY chunks
- Enable xterm.js windowOptions for terminal pixel/char size queries that
  Claude Code sends to determine rendering capabilities
- Launch Claude tab via login shell for full PATH inheritance

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

Root cause: SHA-1 hash sent with applyOtUpdate didn't match Overleaf's
server-side computation, causing "Invalid hash" error, disconnect, and
rollback of all synced changes.

- Remove hash field from applyOtUpdate to skip server-side hash check
- Switch applyOtUpdate from fire-and-forget to emitWithAck for reliable ack
- Fix getOldDoc bug: save base doc when changes start accumulating instead
  of incorrectly using current doc (caused wrong delete ops)
- Fix ack handler: only ack when no 'op' field (was acking remote ops too)
- Await fileSyncBridge.start() instead of fire-and-forget
- Add joinDoc retry logic for transient joinLeaveEpoch mismatch errors
- Clear pending ack callbacks on WebSocket close to prevent timeout errors
- Add otUpdateError logging for server-side rejections
- Add file-based bridge logging for debugging sync issues

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