feat: auto-update from GitHub releases via electron-updater

- checkForUpdatesAndNotify on launch (production only); downloads in
  the background and applies on next start
- mac builds add the zip target electron-updater requires
- release workflow uploads latest*.yml metadata, zips, and blockmaps

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Author: Michael Borck

.github/workflows/release.yml

@@ -82,9 +82,12 @@ jobs:
         files: |
           dist/*.exe
           dist/*.dmg
+          dist/*.zip
           dist/*.AppImage
           dist/*.deb
           dist/*.rpm
+          dist/*.blockmap
+          dist/latest*.yml
         generate_release_notes: true
         draft: false
         prerelease: false

main.js

@@ -135,8 +135,25 @@ async function createWindow() {
   });
 }
 
+// Check GitHub releases for updates; downloads in the background and
+// notifies the user once the update is ready (applied on next launch).
+function checkForUpdates() {
+  if (isDev) return;
+  try {
+    const { autoUpdater } = require('electron-updater');
+    autoUpdater.checkForUpdatesAndNotify().catch((err) => {
+      console.error('Auto-update check failed:', err);
+    });
+  } catch (err) {
+    console.error('Auto-updater unavailable:', err);
+  }
+}
+
 // App event handlers
-app.whenReady().then(createWindow);
+app.whenReady().then(() => {
+  createWindow();
+  checkForUpdates();
+});
 
 app.on('window-all-closed', () => {
   // Close the server when all windows are closed

package-lock.json

@@ -26,6 +26,7 @@
     "@headlessui/react": "^2.1.2",
     "@mozilla/readability": "^0.5.0",
     "@xenova/transformers": "^2.17.2",
+    "electron-updater": "^6.8.9",
     "eventsource-parser": "^1.1.2",
     "get-port": "^6.1.2",
     "jsdom": "^24.1.0",
@@ -88,6 +89,13 @@
             "x64",
             "arm64"
           ]
+        },
+        {
+          "target": "zip",
+          "arch": [
+            "x64",
+            "arm64"
+          ]
         }
       ]
     },