feat: Enhance TTS player functionality and UI

- Added resume functionality to TTS player when paused.
- Display voice name or language in TTS player UI.
- Improved error handling in reader provider with debug messages.
- Updated TTS service to configure Vietnamese voice and handle platform-specific audio settings.
- Removed wakelock dependency and related code.
- Fixed search screen error handling.
- Updated settings screen to navigate to home after sign out.
- Improved splash screen with timer management.
- Enhanced main app error handling with logging.
- Removed unused package_info_plus and wakelock_plus dependencies.
- Added environment variable support for mobile runtime.
- Integrated Google Sign-In configuration for Android.
- Created logging observer for Riverpod providers.
- Added scripts for environment setup and Google Sign-In validation.

lib/features/splash/presentation/splash_screen.dart

@@ -1,3 +1,5 @@
+import 'dart:async';
+
 import 'package:flutter/material.dart';
 import 'package:go_router/go_router.dart';
 
@@ -11,15 +13,23 @@ class SplashScreen extends StatefulWidget {
 }
 
 class _SplashScreenState extends State<SplashScreen> {
+  Timer? _redirectTimer;
+
   @override
   void initState() {
     super.initState();
-    Future<void>.delayed(const Duration(milliseconds: 700), () {
+    _redirectTimer = Timer(const Duration(milliseconds: 700), () {
       if (!mounted) return;
       context.go(RouteNames.home);
     });
   }
 
+  @override
+  void dispose() {
+    _redirectTimer?.cancel();
+    super.dispose();
+  }
+
   @override
   Widget build(BuildContext context) {
     return const Scaffold(