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.

scripts/google_signin_doctor.sh

@@ -0,0 +1,48 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+ROOT_DIR="$(cd "$(dirname "$0")/.." && pwd)"
+APP_GRADLE="$ROOT_DIR/android/app/build.gradle.kts"
+GOOGLE_SERVICES="$ROOT_DIR/android/app/google-services.json"
+DEBUG_KEYSTORE="$HOME/.android/debug.keystore"
+
+echo "== Google Sign-In Doctor (Android) =="
+echo "Project: $ROOT_DIR"
+
+if [[ -f "$APP_GRADLE" ]]; then
+  PKG=$(grep -E 'applicationId\s*=\s*"' "$APP_GRADLE" | head -n1 | sed -E 's/.*"([^"]+)".*/\1/')
+  echo "Package name: ${PKG:-<not-found>}"
+else
+  echo "ERROR: Missing $APP_GRADLE"
+fi
+
+if [[ -f "$GOOGLE_SERVICES" ]]; then
+  echo "google-services.json: FOUND ($GOOGLE_SERVICES)"
+  if grep -q '"project_info"' "$GOOGLE_SERVICES"; then
+    echo "google-services.json format: OK"
+  else
+    echo "google-services.json format: INVALID (this does not look like Firebase Android config)"
+  fi
+else
+  echo "google-services.json: MISSING ($GOOGLE_SERVICES)"
+fi
+
+CLIENT_SECRET_FILE=$(ls "$ROOT_DIR"/android/app/client_secret_*.json 2>/dev/null | head -n1 || true)
+if [[ -n "$CLIENT_SECRET_FILE" ]]; then
+  echo "Found OAuth client secret file: $(basename "$CLIENT_SECRET_FILE")"
+  echo "NOTE: This file is NOT a replacement for google-services.json on Android."
+fi
+
+if [[ -f "$DEBUG_KEYSTORE" ]]; then
+  echo "\nDebug keystore fingerprints:"
+  keytool -list -v -alias androiddebugkey -keystore "$DEBUG_KEYSTORE" -storepass android -keypass android \
+    | grep -E 'SHA1:|SHA256:' || true
+else
+  echo "\nDebug keystore: MISSING ($DEBUG_KEYSTORE)"
+fi
+
+echo "\nChecklist for ApiException: 10"
+echo "1) Create Android app in Firebase with exact package name above."
+echo "2) Add BOTH SHA1 and SHA256 shown above to Firebase Android app settings."
+echo "3) Download new google-services.json and place it at android/app/google-services.json."
+echo "4) Run app again (full restart, not hot reload)."