wip: email sync via imap with status tracking and auto cron

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/servers/api/integrations/integrations.ts

@@ -259,11 +259,16 @@ export const googleCallbackHandler = async (ctx: any) => {
 
   const serverIntegration = await getServerIntegration('google');
 
+  // Merge with existing config to preserve fields like imapAppPassword
+  const existingIntegration = await getUserIntegration(dbUser.id, 'google');
+  const existingConfig = (existingIntegration?.config as Record<string, unknown>) ?? {};
+
   await upsertUserIntegration({
     userId: dbUser.id,
     provider: 'google',
     serverIntegrationId: serverIntegration?.id,
     config: {
+      ...existingConfig,
       accessToken: tokens.access_token,
       refreshToken: tokens.refresh_token,
       expiresAt: Date.now() + tokens.expires_in * 1000,