Feat/auto update (#33)

* feat: add auto-update support to text-diff-view and browser-space

- Add electron-updater to both projects
- Initialize autoUpdater in main process (disabled in dev)
- Expose installUpdate via preload IPC bridge
- Add update notification banner (bottom-right) in renderer
- Set publish provider to GitHub Releases in electron-builder.yml
- Add latest.yml / blockmap to release workflow artifacts
- Create dev-app-update.yml for browser-space

* 1.7.0

* fix build error

Author: kaishuu0123

package.json

@@ -18,8 +18,8 @@
     "build": "npm run typecheck && electron-vite build",
     "postinstall": "electron-builder install-app-deps",
     "build:unpack": "npm run build && electron-builder --dir",
-    "build:win": "npm run build && electron-builder --win",
-    "build:mac": "electron-vite build && electron-builder --mac",
+    "build:win": "npm run build && electron-builder --win --publish never",
+    "build:mac": "electron-vite build && electron-builder --mac --publish never",
     "build:linux": "electron-vite build && electron-builder --linux AppImage snap --publish=never"
   },
   "dependencies": {