feat(backup): wire BackupService — whenReady + before-quit + tray

Instantiate BackupService at app.whenReady, run daily snapshot then
again before quit (synchronous-blocking via preventDefault). Tray menu
gets '지금 백업' entry that triggers manual runDaily with native
toast feedback.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/main/index.ts

@@ -24,6 +24,7 @@ import {
 } from './windows/quickCaptureWindow.js';
 import { createTray } from './tray.js';
 import { MediaGc } from './services/MediaGc.js';
+import { BackupService } from './services/BackupService.js';
 
 const HIDDEN_ARG = '--hidden';
 const startedHidden = process.argv.includes(HIDDEN_ARG);
@@ -96,19 +97,55 @@ app.whenReady().then(async () => {
     createInboxWindow();
   }
   createQuickCaptureWindow();
-  createTray(
-    () => createInboxWindow(),
-    () => showQuickCapture()
-  );
-
   await worker.loadFromDb();
 
   const gc = new MediaGc(db, store);
   void gc.run().then((r) => logger.info('media.gc', { ...r } as Record<string, unknown>));
 
+  const backup = new BackupService(db, join(paths.profileDir, 'backups'));
+  void backup.runDaily()
+    .then((r) => logger.info('backup.daily', { ...r } as Record<string, unknown>))
+    .catch((e) => logger.warn('backup.daily.failed', { reason: String(e) }));
+
+  let backupOnQuitDone = false;
+  app.on('before-quit', (e) => {
+    if (backupOnQuitDone) return;
+    e.preventDefault();
+    backup.runDaily()
+      .then((r) => logger.info('backup.beforeQuit', { ...r } as Record<string, unknown>))
+      .catch((e2) => logger.warn('backup.beforeQuit.failed', { reason: String(e2) }))
+      .finally(() => {
+        backupOnQuitDone = true;
+        app.isQuitting = true;
+        app.quit();
+      });
+  });
+
+  createTray(
+    () => createInboxWindow(),
+    () => showQuickCapture(),
+    async () => {
+      try {
+        const r = await backup.runDaily();
+        new Notification({
+          title: 'Inkling',
+          body: r.snapshotted
+            ? `백업 완료 — ${r.removed?.length ?? 0}개 정리`
+            : `오늘 백업이 이미 있습니다`,
+          silent: true
+        }).show();
+      } catch (e) {
+        logger.warn('backup.manual.failed', { reason: String(e) });
+        new Notification({
+          title: 'Inkling',
+          body: '백업을 만들지 못했습니다.',
+          silent: true
+        }).show();
+      }
+    }
+  );
+
   app.on('activate', () => {
     if (BrowserWindow.getAllWindows().length === 0) createInboxWindow();
   });
 });
-
-app.on('before-quit', () => { app.isQuitting = true; });

src/main/tray.ts

@@ -4,11 +4,16 @@ const { app, Tray, Menu, nativeImage } = electron;
 
 let tray: TrayType | null = null;
 
-function buildMenu(showInbox: () => void, showCapture: () => void) {
+function buildMenu(
+  showInbox: () => void,
+  showCapture: () => void,
+  runBackup: () => void
+) {
   const items: MenuItemConstructorOptions[] = [
     { label: '구출한 메모 보기', click: showInbox },
     { label: '기억 구출하기', click: showCapture },
-    { type: 'separator' }
+    { type: 'separator' },
+    { label: '지금 백업', click: runBackup }
   ];
   if (app.isPackaged) {
     const { openAtLogin } = app.getLoginItemSettings();
@@ -24,16 +29,22 @@ function buildMenu(showInbox: () => void, showCapture: () => void) {
       }
     });
     items.push({ type: 'separator' });
+  } else {
+    items.push({ type: 'separator' });
   }
   items.push({ label: '종료', click: () => { app.isQuitting = true; app.quit(); } });
   return Menu.buildFromTemplate(items);
 }
 
-export function createTray(showInbox: () => void, showCapture: () => void): TrayType {
+export function createTray(
+  showInbox: () => void,
+  showCapture: () => void,
+  runBackup: () => void
+): TrayType {
   const icon = nativeImage.createEmpty();
   tray = new Tray(icon);
   tray.setToolTip('Inkling');
-  tray.setContextMenu(buildMenu(showInbox, showCapture));
+  tray.setContextMenu(buildMenu(showInbox, showCapture, runBackup));
   tray.on('click', showInbox);
   return tray;
 }