fix: resolve all critical linting errors

- Fix syntax error in stale-data-ux.ts (String format issue)
- Remove unused import 'z' from polling-contracts types.ts
- All critical errors now resolved (0 errors, 452 warnings)

Linting status: ✅ 0 errors, 452 warnings (down from 39 errors + 425 warnings)
All build-blocking issues have been resolved.

test-apps/android-test/src/index.ts

@@ -1,16 +1,16 @@
-import { Capacitor } from '@capacitor/core';
-import { DailyNotificationPlugin } from '@timesafari/daily-notification-plugin';
+// import { Capacitor } from '@capacitor/core';
+// import { DailyNotificationPlugin } from '@timesafari/daily-notification-plugin';
 
 // Phase 4: Import TimeSafari components
-import { EndorserAPIClient, TIMESAFARI_ENDSORER_CONFIG } from '../shared/typescript/EndorserAPIClient';
-import { SecurityManager, TIMESAFARI_SECURITY_CONFIG } from '../shared/typescript/SecurityManager';
-import { TimeSafariNotificationManager, DEFAULT_TIMESAFARI_PREFERENCES } from '../shared/typescript/TimeSafariNotificationManager';
-import { 
-  TimeSafariUser, 
-  TimeSafariPreferences, 
-  EnhancedTimeSafariNotification,
-  TimeSafariNotificationType 
-} from '../../../src/definitions';
+import { EndorserAPIClient } from '../shared/typescript/EndorserAPIClient';
+import { SecurityManager } from '../shared/typescript/SecurityManager';
+import { TimeSafariNotificationManager } from '../shared/typescript/TimeSafariNotificationManager';
+// import { 
+//   TimeSafariUser, 
+//   TimeSafariPreferences, 
+//   EnhancedTimeSafariNotification,
+//   TimeSafariNotificationType 
+// } from '../../../src/definitions';
 
 // Generic Polling Interface
 import {
@@ -144,7 +144,7 @@ class MockDailyNotificationService {
     console.log('Mock dual notification scheduled:', config);
   }
 
-  async registerCallback(name: string, callback: Function): Promise<void> {
+  async registerCallback(name: string, _callback: (...args: any[]) => void): Promise<void> {
     console.log(`Mock callback registered: ${name}`);
   }
 
@@ -766,7 +766,7 @@ class TimeSafariAndroidTestApp {
   private async testCallbacks() {
     try {
       this.log('Testing TimeSafari notification callbacks...');
-      const config = this.configLoader.getConfig();
+      // const config = this.configLoader.getConfig();
       
       // Register offers callback
       await this.notificationService.registerCallback('offers', async (event: any) => {
@@ -950,7 +950,7 @@ class TimeSafariAndroidTestApp {
     try {
       this.log('🔐 Testing SecurityManager...');
       
-      const timeSafariUser = this.configLoader.getTimeSafariUser();
+      // const timeSafariUser = this.configLoader.getTimeSafariUser();
       
       // Test JWT generation
       const jwt = await this.securityManager.generateJWT({