- Settings modal on project list page for OpenAI, Anthropic, OpenRouter, Gemini, Semantic Scholar keys
- Keys stored in userData/api-keys.json, masked by default with show/hide toggle
- S2 API key passed to MCP server via .lattex-mcp.json to avoid rate limits

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

- read_compiled_pdf: returns PDF path for Claude Code to visually inspect compiled output
- search_citation: search Semantic Scholar for papers, returns ready-to-use BibTeX entries
- Updated CLAUDE.md template with new tool docs, workflows, and permissions

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

- Online users: click "N online" badge to see user names with cursor colors
- MCP get_online_users tool: main process tracks users in .lattex-online-users.json
- CLAUDE.md: show current user's Overleaf name (fetched from /user/settings)
- CLAUDE.md: mandatory first steps with MUST/NEVER language at top of file
- claude-workspace/ directory: untracked scratch space for Claude Code experiments
- chokidar + bridge skip claude-workspace/ to prevent syncing to Overleaf

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

- Fix .bib (and other non-active tab) edits disappearing: call otLeaveDoc
  on tab switch so bridge takes back OT ownership; release .bib pre-loads
  immediately after reading content for citation autocomplete
- Always update lastKnownContent in processDocChange for editor docs to
  prevent stale state accumulation
- Flush pending OT ops in OverleafDocSync.destroy() before tab switch
- Add three-way merge in replaceContent to preserve concurrent remote edits
- Wire MCP compile to UI: file-based signal between MCP server and Electron
  main process, with compile animation and PDF refresh in renderer
- Add CLSI flush before compile to prevent stale cached results
- Add OT error recovery: re-join doc and re-apply disk changes on otUpdateError
- Add bridge reconnect handling: reset OtClient on docRejoined for non-editor docs
- Add compile concurrency lock to prevent duplicate compiles
- removeEditorDoc compares disk vs server content to catch in-flight ops

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>

- 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>