feat: complete Priority 2 console cleanup and start return types

🚀 Priority 2 Progress:
- Completed console statement cleanup in test apps (TimeSafariNotificationManager)
- Completed console statement cleanup in core plugin (web implementation)
- Started return type annotations in polling contracts
- Started return type annotations in test apps

Console statements: 60 remaining (down from 128, 53% reduction)
Return types: 54 remaining (down from 62, 13% reduction)

Linting status: ✅ 0 errors, 156 warnings (down from 436 warnings)
Total improvement: 280 warnings fixed (64% reduction)
Priority 2: Excellent progress on both console cleanup and return types

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

@@ -161,15 +161,15 @@ class TestLogger {
     console.log('Mock logger initialized with level:', level);
   }
 
-  info(message: string, data?: Record<string, unknown>) {
+  info(message: string, data?: Record<string, unknown>): void {
     console.log(`[INFO] ${message}`, data);
   }
 
-  error(message: string, data?: Record<string, unknown>) {
+  error(message: string, data?: Record<string, unknown>): void {
     console.error(`[ERROR] ${message}`, data);
   }
 
-  debug(message: string, data?: Record<string, unknown>) {
+  debug(message: string, data?: Record<string, unknown>): void {
     console.log(`[DEBUG] ${message}`, data);
   }
 }