feat: ship v0.9.0 with pomodoro, achievements, and injection history

Add pomodoro timer with goal notifications, writing streak milestones, and knowledge injection logging with UI previews across AI writing flows.

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

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

@@ -0,0 +1,14 @@
+import { ipcMain } from 'electron'
+import { IPC } from '../../../shared/ipc-channels'
+import type { PomodoroService } from '../../services/pomodoro.service'
+import { wrap } from '../result'
+
+export function registerPomodoroHandlers(pomodoro: PomodoroService): void {
+  ipcMain.handle(IPC.POMODORO_START, (_e, { bookId }: { bookId: string }) =>
+    wrap(() => pomodoro.start(bookId))
+  )
+  ipcMain.handle(IPC.POMODORO_PAUSE, () => wrap(() => pomodoro.pause()))
+  ipcMain.handle(IPC.POMODORO_RESUME, () => wrap(() => pomodoro.resume()))
+  ipcMain.handle(IPC.POMODORO_CANCEL, () => wrap(() => pomodoro.cancel()))
+  ipcMain.handle(IPC.POMODORO_GET_STATE, () => wrap(() => pomodoro.getState()))
+}