feat: ship v0.6.0 with cockpit, knowledge base, and chapter bridge

Deliver P5 writer workflow: writing cockpit, manual knowledge CRUD with review, chapter bridge with optional AI, publish status, and stock buffer reminders.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/main/ipc/handlers/chapter.handler.ts

@@ -1,6 +1,6 @@
 import { ipcMain } from 'electron'
 import { IPC } from '../../../shared/ipc-channels'
-import type { ChapterStatus } from '../../../shared/types'
+import type { ChapterStatus, PublishStatus } from '../../../shared/types'
 import { BookRegistryService } from '../../services/book-registry'
 import { ftsSync } from '../../services/fts-sync.service'
 import { wrap } from '../result'
@@ -124,4 +124,12 @@ export function registerChapterHandlers(registry: BookRegistryService): void {
     ) =>
       wrap(() => registry.getChapterRepo(bookId).moveToVolume(chapterId, targetVolumeId, targetIndex))
   )
+
+  ipcMain.handle(
+    IPC.CHAPTER_SET_PUBLISH_STATUS,
+    (
+      _event,
+      { bookId, chapterId, publishStatus }: { bookId: string; chapterId: string; publishStatus: PublishStatus }
+    ) => wrap(() => registry.getChapterRepo(bookId).setPublishStatus(chapterId, publishStatus))
+  )
 }