Fix file sync for non-active tabs, MCP compile integration, OT resilience

- 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>

1 files changed, 14 insertions, 2 deletions

diff --git a/src/preload/index.ts b/src/preload/index.ts
index 6bdcdbb..ea330c5 100644
--- a/src/preload/index.ts
+++ b/src/preload/index.ts
@@ -160,13 +160,25 @@ const api = {
   sha1: (text: string): string => createHash('sha1').update(text).digest('hex'),
 
   // File sync bridge
-  onSyncExternalEdit: (cb: (data: { docId: string; content: string }) => void) => {
-    const handler = (_e: Electron.IpcRendererEvent, data: { docId: string; content: string }) => cb(data)
+  onSyncExternalEdit: (cb: (data: { docId: string; content: string; baseContent?: string }) => void) => {
+    const handler = (_e: Electron.IpcRendererEvent, data: { docId: string; content: string; baseContent?: string }) => cb(data)
     ipcRenderer.on('sync:externalEdit', handler)
     return () => ipcRenderer.removeListener('sync:externalEdit', handler)
   },
   syncContentChanged: (docId: string, content: string) =>
     ipcRenderer.invoke('sync:contentChanged', docId, content),
+
+  // MCP compile events (Claude Code triggers compile via file signal)
+  onMcpCompileStarted: (cb: () => void) => {
+    const handler = () => cb()
+    ipcRenderer.on('compile:mcpStarted', handler)
+    return () => ipcRenderer.removeListener('compile:mcpStarted', handler)
+  },
+  onMcpCompileFinished: (cb: (data: { success: boolean; pdfPath: string }) => void) => {
+    const handler = (_e: Electron.IpcRendererEvent, data: { success: boolean; pdfPath: string }) => cb(data)
+    ipcRenderer.on('compile:mcpFinished', handler)
+    return () => ipcRenderer.removeListener('compile:mcpFinished', handler)
+  },
   onSyncNewDoc: (cb: (data: { docId: string | null; relPath: string }) => void) => {
     const handler = (_e: Electron.IpcRendererEvent, data: { docId: string | null; relPath: string }) => cb(data)
     ipcRenderer.on('sync:newDoc', handler)