fix: default allowPrereleaseUpdates to false

Pre-release updates were opted-in by default during beta. Now that
stable releases are available, default to false so users only receive
stable updates unless they explicitly enable pre-release in settings.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: OpenSource03

electron/src/lib/app-settings.ts

@@ -33,7 +33,7 @@ export interface NotificationSettings {
 }
 
 export interface AppSettings {
-  /** Include pre-release versions when checking for updates (default: true) */
+  /** Include pre-release versions when checking for updates (default: false) */
   allowPrereleaseUpdates: boolean;
   /** Number of recent chats to show per project in the sidebar (default: 10) */
   defaultChatLimit: number;
@@ -73,7 +73,7 @@ const NOTIFICATION_DEFAULTS: NotificationSettings = {
 };
 
 const DEFAULTS: AppSettings = {
-  allowPrereleaseUpdates: true,
+  allowPrereleaseUpdates: false,
   defaultChatLimit: 10,
   preferredEditor: "auto",
   voiceDictation: "native",

electron/src/lib/updater.ts

@@ -79,7 +79,7 @@ export function initAutoUpdater(
 
   autoUpdater.autoDownload = false;
   autoUpdater.autoInstallOnAppQuit = true;
-  // Read persisted preference (defaults to true — all GitHub releases are pre-release/beta)
+  // Read persisted preference (defaults to false)
   autoUpdater.allowPrerelease = getAppSetting("allowPrereleaseUpdates");
 
   // React to setting changes at runtime (e.g. user toggles in Settings UI)

src/components/settings/GeneralSettings.tsx

@@ -17,7 +17,7 @@ export const GeneralSettings = memo(function GeneralSettings({
   onUpdateAppSettings,
 }: GeneralSettingsProps) {
   // Local optimistic state — synced from props once loaded
-  const [allowPrerelease, setAllowPrerelease] = useState(true);
+  const [allowPrerelease, setAllowPrerelease] = useState(false);
   const [chatLimit, setChatLimit] = useState(10);
   const [preferredEditor, setPreferredEditor] = useState<PreferredEditor>("auto");
   const [voiceDictation, setVoiceDictation] = useState<VoiceDictationMode>("native");