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/ios-test/src/index.ts

@@ -5,12 +5,12 @@ import { ConfigLoader, MockDailyNotificationService, TestLogger } from '../share
 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';
+// import { 
+//   TimeSafariUser, 
+//   TimeSafariPreferences, 
+//   EnhancedTimeSafariNotification,
+//   TimeSafariNotificationType 
+// } from '../../../src/definitions';
 
 // Generic Polling Interface
 import {
@@ -621,7 +621,7 @@ class TimeSafariIOSTestApp {
   private async testCallbacks() {
     try {
       this.log('Testing TimeSafari iOS notification callbacks...');
-      const config = this.configLoader.getConfig();
+      // const config = this.configLoader.getConfig();
       
       // Register offers callback
       await this.notificationService.registerCallback('offers', async (event: any) => {
@@ -794,7 +794,7 @@ class TimeSafariIOSTestApp {
     try {
       this.log('🔐 Testing SecurityManager (iOS)...');
       
-      const timeSafariUser = this.configLoader.getTimeSafariUser();
+      // const timeSafariUser = this.configLoader.getTimeSafariUser();
       
       // Test JWT generation
       const jwt = await this.securityManager.generateJWT({