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/cockpit.handler.ts

@@ -0,0 +1,27 @@
+import { ipcMain } from 'electron'
+import { IPC } from '../../../shared/ipc-channels'
+import { BookRegistryService } from '../../services/book-registry'
+import { CockpitService } from '../../services/cockpit.service'
+import type { GlobalSettingsService } from '../../services/global-settings'
+import { wrap } from '../result'
+
+export function registerCockpitHandlers(
+  registry: BookRegistryService,
+  settings: GlobalSettingsService
+): void {
+  ipcMain.handle(
+    IPC.COCKPIT_SUMMARY,
+    (_e, { bookId, volumeId }: { bookId: string; volumeId?: string }) =>
+      wrap(() => new CockpitService(registry.getDb(bookId), settings).getSummary(volumeId))
+  )
+
+  ipcMain.handle(IPC.COCKPIT_MARK_SEEN, (_e, { bookId }: { bookId: string }) =>
+    wrap(() => {
+      new CockpitService(registry.getDb(bookId), settings).markSeen()
+    })
+  )
+
+  ipcMain.handle(IPC.COCKPIT_SHOULD_SHOW, (_e, { bookId }: { bookId: string }) =>
+    wrap(() => new CockpitService(registry.getDb(bookId), settings).shouldShowOnOpen())
+  )
+}