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/reader/providers/reader_provider.dart

@@ -1,4 +1,5 @@
 import 'dart:async';
+import 'package:flutter/foundation.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 import '../../../core/models/chapter_model.dart';
 import '../../../core/models/reading_settings.dart';
@@ -21,8 +22,10 @@ final chapterProvider =
     unawaited(offlineCache.saveChapter(chapter));
     return chapter;
   } catch (_) {
+    debugPrint('[READER][CHAPTER][ERROR] Failed to load chapterId=$chapterId from network, trying cache');
     final cached = await offlineCache.loadChapter(chapterId);
     if (cached != null) return cached;
+    debugPrint('[READER][CHAPTER][ERROR] No cache for chapterId=$chapterId');
     rethrow;
   }
 });
@@ -57,7 +60,6 @@ class ReaderNotifier extends StateNotifier<ReadingProgress?> {
       chapterNumber: chapterNumber,
       scrollOffset: 0,
     );
-    _persistProgress(chapterId, chapterNumber, 0);
   }
   void updateScroll(double offset) {
     if (state == null) return;