feat: Update app branding and icon assets for Virtus's Reader

- Add `ReaderTtsMediaService` to handle background playback, media controls, and notifications on Android
- Integrate `MediaSessionCompat` to support external media controls and lock screen integration
- Add `ReaderTtsMediaBridge` for synchronized state communication between Kotlin and Flutter
- Update `TtsNotifier` to use the native Android service when available, with a fallback for other platforms
- Implement sentence-level highlighting and tapping to start reading from a specific location
- Update Android manifest with necessary permissions for foreground services and notifications
- Adjust TTS speech rate constants and improve playback health monitoring and recovery logic

.gitea/workflows/build-aab.yml

@@ -0,0 +1,236 @@
+name: Build Android AAB
+
+on:
+  push:
+    tags:
+      - "v*"
+  workflow_dispatch:
+    inputs:
+      release_tag:
+        description: "Release tag (example: v1.0.10)"
+        required: false
+
+jobs:
+  build-aab:
+    runs-on: ubuntu-latest
+
+    env:
+      BASE_URL: ${{ secrets.BASE_URL }}
+      GOOGLE_SERVER_CLIENT_ID: ${{ secrets.GOOGLE_SERVER_CLIENT_ID }}
+      GOOGLE_CLIENT_ID: ${{ secrets.GOOGLE_CLIENT_ID }}
+      TOKEN: ${{ secrets.TOKEN }}
+      RELEASE_TAG: ""
+      ANDROID_KEYSTORE_BASE64: ${{ secrets.ANDROID_KEYSTORE_BASE64 }}
+      ANDROID_KEYSTORE_PASSWORD: ${{ secrets.ANDROID_KEYSTORE_PASSWORD }}
+      ANDROID_KEY_ALIAS: ${{ secrets.ANDROID_KEY_ALIAS }}
+      ANDROID_KEY_PASSWORD: ${{ secrets.ANDROID_KEY_PASSWORD }}
+      EXPECTED_ANDROID_SHA1: ${{ secrets.EXPECTED_ANDROID_SHA1 }}
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Java
+        uses: actions/setup-java@v4
+        with:
+          distribution: temurin
+          java-version: "17"
+
+      - name: Setup Flutter
+        uses: subosito/flutter-action@v2
+        with:
+          channel: stable
+
+      - name: Setup Android SDK
+        uses: android-actions/setup-android@v3
+
+      - name: Install Android SDK packages
+        run: |
+          sdkmanager "platform-tools" "platforms;android-35" "build-tools;35.0.0"
+
+          set +e
+          yes | sdkmanager --licenses >/dev/null 2>&1
+          LICENSE_EXIT=$?
+          set -e
+
+          if [ "$LICENSE_EXIT" -ne 0 ] && [ "$LICENSE_EXIT" -ne 141 ]; then
+            echo "sdkmanager --licenses failed with exit code $LICENSE_EXIT"
+            exit "$LICENSE_EXIT"
+          fi
+
+      - name: Show Flutter and Dart version
+        run: |
+          flutter --version
+          flutter doctor -v
+
+      - name: Install dependencies
+        run: flutter pub get
+
+      - name: Install release tooling
+        run: sudo apt-get update && sudo apt-get install -y jq
+
+      - name: Resolve release tag input
+        run: |
+          RESOLVED_TAG=""
+
+          if [ "${GITHUB_EVENT_NAME}" = "workflow_dispatch" ] && [ -n "${INPUT_RELEASE_TAG:-}" ]; then
+            RESOLVED_TAG="${INPUT_RELEASE_TAG}"
+          elif [[ "${GITHUB_REF:-}" == refs/tags/* ]]; then
+            RESOLVED_TAG="${GITHUB_REF#refs/tags/}"
+          fi
+
+          echo "RELEASE_TAG=${RESOLVED_TAG}" >> "$GITHUB_ENV"
+          echo "Resolved RELEASE_TAG=${RESOLVED_TAG:-<empty>}"
+
+      - name: Prepare Android release signing
+        run: |
+          if [ -n "${ANDROID_KEYSTORE_BASE64}" ] && [ -n "${ANDROID_KEYSTORE_PASSWORD}" ] && [ -n "${ANDROID_KEY_PASSWORD}" ]; then
+            echo "Preparing release keystore from secrets"
+
+            if ! python3 -c "import base64,os,re,sys; s=os.environ.get('ANDROID_KEYSTORE_BASE64',''); s=s.strip().strip(chr(34)).strip(chr(39)); s=s.replace('\\n',''); s=re.sub(r'^data:[^,]*,','',s); s=re.sub(r'\\s+','',s); s=s + ('=' * (-len(s) % 4)); (print('ANDROID_KEYSTORE_BASE64 is empty after normalization'), sys.exit(1)) if not s else None; d=base64.b64decode(s, validate=False); open('android/app/release.keystore','wb').write(d); print('Decoded keystore bytes:', len(d))"
+            then
+              echo "Keystore decoding failed"
+              exit 1
+            fi
+
+            if [ ! -s android/app/release.keystore ]; then
+              echo "Decoded keystore file is empty"
+              exit 1
+            fi
+
+            if ! keytool -list -keystore android/app/release.keystore -storepass "${ANDROID_KEYSTORE_PASSWORD}" >/dev/null 2>&1; then
+              echo "Decoded keystore is invalid or ANDROID_KEYSTORE_PASSWORD is incorrect"
+              exit 1
+            fi
+
+            RESOLVED_KEY_ALIAS="${ANDROID_KEY_ALIAS}"
+            if [ -z "$RESOLVED_KEY_ALIAS" ]; then
+              RESOLVED_KEY_ALIAS=$(keytool -list -v -keystore android/app/release.keystore -storepass "${ANDROID_KEYSTORE_PASSWORD}" | awk -F': ' '/Alias name:/{print $2; exit}')
+            fi
+
+            if [ -z "$RESOLVED_KEY_ALIAS" ]; then
+              echo "Could not resolve key alias from keystore"
+              exit 1
+            fi
+
+            if ! keytool -list -keystore android/app/release.keystore -storepass "${ANDROID_KEYSTORE_PASSWORD}" -alias "$RESOLVED_KEY_ALIAS" >/dev/null 2>&1; then
+              echo "Configured key alias does not exist in keystore: $RESOLVED_KEY_ALIAS"
+              keytool -list -v -keystore android/app/release.keystore -storepass "${ANDROID_KEYSTORE_PASSWORD}" | sed -n 's/^Alias name: /Available alias: /p'
+              exit 1
+            fi
+
+            echo "Using keystore alias: $RESOLVED_KEY_ALIAS"
+
+            {
+              echo "storeFile=release.keystore"
+              echo "storePassword=${ANDROID_KEYSTORE_PASSWORD}"
+              echo "keyAlias=${RESOLVED_KEY_ALIAS}"
+              echo "keyPassword=${ANDROID_KEY_PASSWORD}"
+            } > android/key.properties
+          else
+            echo "Release signing secrets are required for tagged release builds."
+            echo "Please configure: ANDROID_KEYSTORE_BASE64, ANDROID_KEYSTORE_PASSWORD, ANDROID_KEY_PASSWORD"
+            echo "Optional: ANDROID_KEY_ALIAS (auto-detected if omitted)"
+            exit 1
+          fi
+
+      - name: Build release AAB
+        run: |
+          BASE_URL_VALUE="${BASE_URL:-http://127.0.0.1:8000}"
+
+          FLUTTER_CMD=(
+            flutter build appbundle --release
+            --dart-define=BASE_URL=${BASE_URL_VALUE}
+          )
+
+          if [ -n "${GOOGLE_SERVER_CLIENT_ID}" ]; then
+            FLUTTER_CMD+=(--dart-define=GOOGLE_SERVER_CLIENT_ID=${GOOGLE_SERVER_CLIENT_ID})
+          fi
+
+          if [ -n "${GOOGLE_CLIENT_ID}" ]; then
+            FLUTTER_CMD+=(--dart-define=GOOGLE_CLIENT_ID=${GOOGLE_CLIENT_ID})
+          fi
+
+          "${FLUTTER_CMD[@]}"
+
+      - name: Verify AAB signing certificate
+        run: |
+          AAB_PATH="build/app/outputs/bundle/release/app-release.aab"
+
+          if [ ! -f "$AAB_PATH" ]; then
+            echo "AAB not found at $AAB_PATH"
+            exit 1
+          fi
+
+          CERT_OUTPUT="$(keytool -printcert -jarfile "$AAB_PATH")"
+          echo "$CERT_OUTPUT"
+
+          if [ -n "${EXPECTED_ANDROID_SHA1}" ]; then
+            AAB_SHA1=$(echo "$CERT_OUTPUT" | awk -F'SHA1:' '/SHA1:/{print $2; exit}')
+            AAB_SHA1_NORMALIZED=$(echo "$AAB_SHA1" | tr -cd '[:xdigit:]' | tr '[:lower:]' '[:upper:]')
+            EXPECTED_SHA1_NORMALIZED=$(echo "${EXPECTED_ANDROID_SHA1}" | tr -cd '[:xdigit:]' | tr '[:lower:]' '[:upper:]')
+
+            if [ -z "$AAB_SHA1_NORMALIZED" ]; then
+              echo "Could not parse SHA-1 from keytool output"
+              exit 1
+            fi
+
+            if [ "$AAB_SHA1_NORMALIZED" != "$EXPECTED_SHA1_NORMALIZED" ]; then
+              echo "AAB SHA-1 mismatch"
+              echo "Expected (normalized): $EXPECTED_SHA1_NORMALIZED"
+              echo "Actual   (normalized): $AAB_SHA1_NORMALIZED"
+              echo "Tip: update EXPECTED_ANDROID_SHA1 to this signer if this is your intended upload key"
+              exit 1
+            fi
+          fi
+
+      - name: Create or update Gitea release and upload AAB
+        run: |
+          if [ -z "${RELEASE_TAG}" ]; then
+            echo "No release_tag provided. Build completed without creating a release."
+            exit 0
+          fi
+
+          if [ -z "${TOKEN}" ]; then
+            echo "Missing required secret: TOKEN"
+            exit 1
+          fi
+
+          AAB_PATH="build/app/outputs/bundle/release/app-release.aab"
+          if [ ! -f "$AAB_PATH" ]; then
+            echo "AAB not found at $AAB_PATH"
+            exit 1
+          fi
+
+          OWNER_REPO="${GITHUB_REPOSITORY}"
+          OWNER="${OWNER_REPO%%/*}"
+          REPO="${OWNER_REPO##*/}"
+          TAG="${RELEASE_TAG}"
+          API_BASE="${GITHUB_SERVER_URL}/api/v1"
+
+          RELEASE_JSON=$(curl -sS -X POST \
+            -H "Authorization: token ${TOKEN}" \
+            -H "Content-Type: application/json" \
+            "${API_BASE}/repos/${OWNER}/${REPO}/releases" \
+            -d "{\"tag_name\":\"${TAG}\",\"name\":\"${TAG}\",\"draft\":false,\"prerelease\":false}" \
+            || true)
+
+          RELEASE_ID=$(echo "$RELEASE_JSON" | jq -r '.id // empty')
+
+          if [ -z "$RELEASE_ID" ]; then
+            RELEASE_JSON=$(curl -sS \
+              -H "Authorization: token ${TOKEN}" \
+              "${API_BASE}/repos/${OWNER}/${REPO}/releases/tags/${TAG}")
+            RELEASE_ID=$(echo "$RELEASE_JSON" | jq -r '.id // empty')
+          fi
+
+          if [ -z "$RELEASE_ID" ]; then
+            echo "Could not resolve release ID for tag ${TAG}"
+            echo "$RELEASE_JSON"
+            exit 1
+          fi
+
+          curl -sS -X POST \
+            -H "Authorization: token ${TOKEN}" \
+            -F "attachment=@${AAB_PATH}" \
+            "${API_BASE}/repos/${OWNER}/${REPO}/releases/${RELEASE_ID}/assets?name=reader-app-${TAG}.aab"

.gitea/workflows/build-apk.yml

@@ -84,7 +84,7 @@ jobs:
 
       - name: Prepare Android release signing
         run: |
-          if [ -n "${ANDROID_KEYSTORE_BASE64}" ] && [ -n "${ANDROID_KEYSTORE_PASSWORD}" ] && [ -n "${ANDROID_KEY_ALIAS}" ] && [ -n "${ANDROID_KEY_PASSWORD}" ]; then
+          if [ -n "${ANDROID_KEYSTORE_BASE64}" ] && [ -n "${ANDROID_KEYSTORE_PASSWORD}" ] && [ -n "${ANDROID_KEY_PASSWORD}" ]; then
             echo "Preparing release keystore from secrets"
 
             if ! python3 -c "import base64,os,re,sys; s=os.environ.get('ANDROID_KEYSTORE_BASE64',''); s=s.strip().strip(chr(34)).strip(chr(39)); s=s.replace('\\n',''); s=re.sub(r'^data:[^,]*,','',s); s=re.sub(r'\\s+','',s); s=s + ('=' * (-len(s) % 4)); (print('ANDROID_KEYSTORE_BASE64 is empty after normalization'), sys.exit(1)) if not s else None; d=base64.b64decode(s, validate=False); open('android/app/release.keystore','wb').write(d); print('Decoded keystore bytes:', len(d))"
@@ -103,15 +103,34 @@ jobs:
               exit 1
             fi
 
+            RESOLVED_KEY_ALIAS="${ANDROID_KEY_ALIAS}"
+            if [ -z "$RESOLVED_KEY_ALIAS" ]; then
+              RESOLVED_KEY_ALIAS=$(keytool -list -v -keystore android/app/release.keystore -storepass "${ANDROID_KEYSTORE_PASSWORD}" | awk -F': ' '/Alias name:/{print $2; exit}')
+            fi
+
+            if [ -z "$RESOLVED_KEY_ALIAS" ]; then
+              echo "Could not resolve key alias from keystore"
+              exit 1
+            fi
+
+            if ! keytool -list -keystore android/app/release.keystore -storepass "${ANDROID_KEYSTORE_PASSWORD}" -alias "$RESOLVED_KEY_ALIAS" >/dev/null 2>&1; then
+              echo "Configured key alias does not exist in keystore: $RESOLVED_KEY_ALIAS"
+              keytool -list -v -keystore android/app/release.keystore -storepass "${ANDROID_KEYSTORE_PASSWORD}" | sed -n 's/^Alias name: /Available alias: /p'
+              exit 1
+            fi
+
+            echo "Using keystore alias: $RESOLVED_KEY_ALIAS"
+
             {
               echo "storeFile=release.keystore"
               echo "storePassword=${ANDROID_KEYSTORE_PASSWORD}"
-              echo "keyAlias=${ANDROID_KEY_ALIAS}"
+              echo "keyAlias=${RESOLVED_KEY_ALIAS}"
               echo "keyPassword=${ANDROID_KEY_PASSWORD}"
             } > android/key.properties
           else
             echo "Release signing secrets are required for tagged release builds."
-            echo "Please configure: ANDROID_KEYSTORE_BASE64, ANDROID_KEYSTORE_PASSWORD, ANDROID_KEY_ALIAS, ANDROID_KEY_PASSWORD"
+            echo "Please configure: ANDROID_KEYSTORE_BASE64, ANDROID_KEYSTORE_PASSWORD, ANDROID_KEY_PASSWORD"
+            echo "Optional: ANDROID_KEY_ALIAS (auto-detected if omitted)"
             exit 1
           fi
 
@@ -153,13 +172,15 @@ jobs:
           echo "$CERT_OUTPUT"
 
           if [ -n "${EXPECTED_ANDROID_SHA1}" ]; then
-            APK_SHA1=$(echo "$CERT_OUTPUT" | sed -n 's/.*certificate SHA-1 digest: //p' | head -n1 | tr '[:lower:]' '[:upper:]')
-            EXPECTED_SHA1_UPPER=$(echo "${EXPECTED_ANDROID_SHA1}" | tr '[:lower:]' '[:upper:]')
+            APK_SHA1=$(echo "$CERT_OUTPUT" | sed -n 's/.*certificate SHA-1 digest: //p' | head -n1)
+            APK_SHA1_NORMALIZED=$(echo "$APK_SHA1" | tr -d '[:space:]:-' | tr '[:lower:]' '[:upper:]')
+            EXPECTED_SHA1_NORMALIZED=$(echo "${EXPECTED_ANDROID_SHA1}" | tr -d '[:space:]:-' | tr '[:lower:]' '[:upper:]')
 
-            if [ "$APK_SHA1" != "$EXPECTED_SHA1_UPPER" ]; then
+            if [ "$APK_SHA1_NORMALIZED" != "$EXPECTED_SHA1_NORMALIZED" ]; then
               echo "APK SHA-1 mismatch"
-              echo "Expected: $EXPECTED_SHA1_UPPER"
-              echo "Actual  : $APK_SHA1"
+              echo "Expected (normalized): $EXPECTED_SHA1_NORMALIZED"
+              echo "Actual   (normalized): $APK_SHA1_NORMALIZED"
+              echo "Tip: update EXPECTED_ANDROID_SHA1 to this signer if this is your intended release key"
               exit 1
             fi
           fi

android/app/build.gradle.kts

@@ -4,6 +4,7 @@ import java.util.Properties
 plugins {
     id("com.android.application")
     id("kotlin-android")
+    id("kotlin-parcelize")
     // The Flutter Gradle Plugin must be applied after the Android and Kotlin Gradle plugins.
     id("dev.flutter.flutter-gradle-plugin")
     id("com.google.gms.google-services")
@@ -34,7 +35,7 @@ android {
 
     defaultConfig {
         // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
-        applicationId = "com.example.reader_app"
+        applicationId = "dev.fevirtus.reader"
         // You can update the following values to match your application needs.
         // For more information, see: https://flutter.dev/to/review-gradle-config.
         minSdk = flutter.minSdkVersion
@@ -66,6 +67,10 @@ android {
     }
 }
 
+dependencies {
+    implementation("androidx.media:media:1.7.0")
+}
+
 flutter {
     source = "../.."
 }

android/app/google-services.json

@@ -7,20 +7,36 @@
   "client": [
     {
       "client_info": {
-        "mobilesdk_app_id": "1:308259929553:android:9142ae16d9ddd8a91c34f0",
+        "mobilesdk_app_id": "1:308259929553:android:14f7828b9b9ca9d31c34f0",
         "android_client_info": {
-          "package_name": "com.example.reader_app"
+          "package_name": "dev.fevirtus.reader"
         }
       },
       "oauth_client": [
         {
-          "client_id": "308259929553-6k3q1g76skt3id4e2mk9k6pr5l7gdtju.apps.googleusercontent.com",
+          "client_id": "308259929553-58cnurk30t6stf9ebj7p5jv1b5gftr29.apps.googleusercontent.com",
           "client_type": 1,
           "android_info": {
-            "package_name": "com.example.reader_app",
+            "package_name": "dev.fevirtus.reader",
+            "certificate_hash": "72eb1a744349efea8402128e2d9c98c989ec62b5"
+          }
+        },
+        {
+          "client_id": "308259929553-fd8teopc4chi2jjd8kr5vn9inn35ar6j.apps.googleusercontent.com",
+          "client_type": 1,
+          "android_info": {
+            "package_name": "dev.fevirtus.reader",
             "certificate_hash": "fa21a3e6a319b71b2dd0ef9573b22046dba5d55c"
           }
         },
+        {
+          "client_id": "308259929553-kdfvnu11cq6k9a2l1b3gtrmfmtsggduk.apps.googleusercontent.com",
+          "client_type": 1,
+          "android_info": {
+            "package_name": "dev.fevirtus.reader",
+            "certificate_hash": "f7e9f7ec9bafd1de69934b2c9b52ee491d73bad7"
+          }
+        },
         {
           "client_id": "308259929553-9oame596io3s4lcj9cdb5db6v3i6f6rk.apps.googleusercontent.com",
           "client_type": 3

android/app/src/main/AndroidManifest.xml

@@ -2,8 +2,11 @@
     <uses-permission android:name="android.permission.INTERNET"/>
     <uses-permission android:name="android.permission.WAKE_LOCK"/>
     <uses-permission android:name="android.permission.REQUEST_IGNORE_BATTERY_OPTIMIZATIONS"/>
+    <uses-permission android:name="android.permission.FOREGROUND_SERVICE"/>
+    <uses-permission android:name="android.permission.FOREGROUND_SERVICE_MEDIA_PLAYBACK"/>
+    <uses-permission android:name="android.permission.POST_NOTIFICATIONS"/>
     <application
-        android:label="reader_app"
+        android:label="Virtus's Reader"
         android:name="${applicationName}"
         android:icon="@mipmap/ic_launcher"
         android:usesCleartextTraffic="true">
@@ -34,6 +37,10 @@
         <meta-data
             android:name="flutterEmbedding"
             android:value="2" />
+        <service
+            android:name=".tts.ReaderTtsMediaService"
+            android:exported="false"
+            android:foregroundServiceType="mediaPlayback" />
     </application>
     <!-- Required to query activities that can process text, see:
          https://developer.android.com/training/package-visibility and

android/app/src/main/kotlin/com/example/reader_app/MainActivity.kt

@@ -6,12 +6,19 @@ import android.net.Uri
 import android.os.Build
 import android.os.PowerManager
 import android.provider.Settings
+import androidx.core.app.NotificationManagerCompat
 import io.flutter.embedding.engine.FlutterEngine
 import io.flutter.embedding.android.FlutterActivity
+import io.flutter.plugin.common.EventChannel
 import io.flutter.plugin.common.MethodChannel
+import com.example.reader_app.tts.ReaderTtsMediaBridge
+import com.example.reader_app.tts.ReaderTtsMediaService
+import com.example.reader_app.tts.ReaderTtsSegment
 
 class MainActivity : FlutterActivity() {
 	private val channelName = "reader_app/tts_background"
+	private val mediaChannelName = "reader_app/tts_media"
+	private val mediaEventsChannelName = "reader_app/tts_media_events"
 	private var wakeLock: PowerManager.WakeLock? = null
 
 	override fun configureFlutterEngine(flutterEngine: FlutterEngine) {
@@ -35,6 +42,117 @@ class MainActivity : FlutterActivity() {
 					else -> result.notImplemented()
 				}
 			}
+
+		MethodChannel(flutterEngine.dartExecutor.binaryMessenger, mediaChannelName)
+			.setMethodCallHandler { call, result ->
+				when (call.method) {
+					"initialize" -> {
+						val enabled = call.argument<Boolean>("backgroundModeEnabled") ?: true
+						ReaderTtsMediaService.initialize(this, enabled)
+						result.success(ReaderTtsMediaBridge.snapshot())
+					}
+					"getSnapshot" -> result.success(ReaderTtsMediaBridge.snapshot())
+					"startReading" -> {
+						val startIndex = call.argument<Int>("startIndex") ?: 0
+						val contentKey = call.argument<String>("contentKey")
+						val title = call.argument<String>("title")
+						val speed = call.argument<Double>("speed") ?: 0.9
+						val language = call.argument<String>("language") ?: "vi-VN"
+						val voiceName = call.argument<String>("voiceName")
+						val backgroundModeEnabled = call.argument<Boolean>("backgroundModeEnabled") ?: true
+						ReaderTtsMediaService.startReading(
+							this,
+							parseSegments(call.argument<List<*>>("segments")),
+							startIndex,
+							contentKey,
+							title,
+							speed,
+							language,
+							voiceName,
+							backgroundModeEnabled,
+						)
+						result.success(null)
+					}
+					"pause" -> {
+						ReaderTtsMediaService.pause(this)
+						result.success(null)
+					}
+					"resume" -> {
+						ReaderTtsMediaService.resume(this)
+						result.success(null)
+					}
+					"stop" -> {
+						ReaderTtsMediaService.stop(this)
+						result.success(null)
+					}
+					"skipForward" -> {
+						ReaderTtsMediaService.skipForward(this)
+						result.success(null)
+					}
+					"skipBack" -> {
+						ReaderTtsMediaService.skipBack(this)
+						result.success(null)
+					}
+					"setSpeed" -> {
+						val speed = call.argument<Double>("speed") ?: 0.9
+						ReaderTtsMediaService.setSpeed(this, speed)
+						result.success(null)
+					}
+					"setVoiceByName" -> {
+						ReaderTtsMediaService.setVoice(
+							this,
+							call.argument<String>("voiceName"),
+							call.argument<String>("language"),
+						)
+						result.success(null)
+					}
+					"setBackgroundModeEnabled" -> {
+						val enabled = call.argument<Boolean>("enabled") ?: true
+						ReaderTtsMediaService.setBackgroundModeEnabled(this, enabled)
+						result.success(null)
+					}
+					"areNotificationsEnabled" -> {
+						result.success(NotificationManagerCompat.from(this).areNotificationsEnabled())
+					}
+					"openNotificationSettings" -> {
+						openNotificationSettings()
+						result.success(null)
+					}
+					"dispose" -> result.success(null)
+					else -> result.notImplemented()
+				}
+			}
+
+		EventChannel(flutterEngine.dartExecutor.binaryMessenger, mediaEventsChannelName)
+			.setStreamHandler(
+				object : EventChannel.StreamHandler {
+					override fun onListen(arguments: Any?, events: EventChannel.EventSink) {
+						ReaderTtsMediaBridge.attachSink(events)
+					}
+
+					override fun onCancel(arguments: Any?) {
+						ReaderTtsMediaBridge.detachSink()
+					}
+				},
+			)
+	}
+
+	private fun parseSegments(rawSegments: List<*>?): ArrayList<ReaderTtsSegment> {
+		val segments = arrayListOf<ReaderTtsSegment>()
+		rawSegments.orEmpty().forEach { item ->
+			val map = item as? Map<*, *> ?: return@forEach
+			val text = map["text"]?.toString() ?: return@forEach
+			val paragraphIndex = (map["paragraphIndex"] as? Number)?.toInt() ?: -1
+			val start = (map["start"] as? Number)?.toInt() ?: -1
+			val end = (map["end"] as? Number)?.toInt() ?: -1
+			segments += ReaderTtsSegment(
+				text = text,
+				paragraphIndex = paragraphIndex,
+				start = start,
+				end = end,
+			)
+		}
+		return segments
 	}
 
 	private fun isIgnoringBatteryOptimizations(): Boolean {
@@ -76,6 +194,19 @@ class MainActivity : FlutterActivity() {
 		wakeLock = null
 	}
 
+	private fun openNotificationSettings() {
+		val intent = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+			Intent(Settings.ACTION_APP_NOTIFICATION_SETTINGS).apply {
+				putExtra(Settings.EXTRA_APP_PACKAGE, packageName)
+			}
+		} else {
+			Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS).apply {
+				data = Uri.fromParts("package", packageName, null)
+			}
+		}
+		startActivity(intent)
+	}
+
 	override fun onDestroy() {
 		setWakeLockEnabled(false)
 		super.onDestroy()

android/app/src/main/kotlin/com/example/reader_app/tts/ReaderTtsMediaBridge.kt

@@ -0,0 +1,44 @@
+package com.example.reader_app.tts
+
+import io.flutter.plugin.common.EventChannel
+
+object ReaderTtsMediaBridge {
+	private var eventSink: EventChannel.EventSink? = null
+	private var latestSnapshot: Map<String, Any?> = defaultSnapshot()
+
+	@Synchronized
+	fun attachSink(sink: EventChannel.EventSink) {
+		eventSink = sink
+		sink.success(HashMap(latestSnapshot))
+	}
+
+	@Synchronized
+	fun detachSink() {
+		eventSink = null
+	}
+
+	@Synchronized
+	fun publish(snapshot: Map<String, Any?>) {
+		latestSnapshot = HashMap(snapshot)
+		eventSink?.success(HashMap(latestSnapshot))
+	}
+
+	@Synchronized
+	fun snapshot(): Map<String, Any?> = HashMap(latestSnapshot)
+
+	private fun defaultSnapshot(): Map<String, Any?> = hashMapOf(
+		"status" to "idle",
+		"paragraphIndex" to 0,
+		"totalParagraphs" to 0,
+		"activeParagraphIndex" to -1,
+		"progressStart" to -1,
+		"progressEnd" to -1,
+		"contentKey" to null,
+		"completedCount" to 0,
+		"backgroundModeEnabled" to true,
+		"language" to "vi-VN",
+		"voiceName" to null,
+		"availableVietnameseVoices" to emptyList<Map<String, String>>()
+	)
+}
+

android/app/src/main/kotlin/com/example/reader_app/tts/ReaderTtsMediaService.kt

@@ -0,0 +1,924 @@
+package com.example.reader_app.tts
+
+import android.annotation.SuppressLint
+import android.app.NotificationChannel
+import android.app.NotificationManager
+import android.app.PendingIntent
+import android.app.Service
+import android.content.Context
+import android.content.Intent
+import android.media.AudioAttributes
+import android.media.AudioFocusRequest
+import android.media.AudioManager
+import android.os.Build
+import android.os.Bundle
+import android.os.Handler
+import android.os.IBinder
+import android.os.Looper
+import android.os.Parcelable
+import android.speech.tts.TextToSpeech
+import android.speech.tts.UtteranceProgressListener
+import android.util.Log
+import androidx.core.app.NotificationCompat
+import androidx.core.app.NotificationManagerCompat
+import androidx.core.content.ContextCompat
+import androidx.media.app.NotificationCompat.MediaStyle
+import android.support.v4.media.MediaMetadataCompat
+import android.support.v4.media.session.MediaSessionCompat
+import android.support.v4.media.session.PlaybackStateCompat
+import com.example.reader_app.R
+import kotlinx.parcelize.Parcelize
+import java.util.Locale
+
+@Parcelize
+data class ReaderTtsSegment(
+	val text: String,
+	val paragraphIndex: Int,
+	val start: Int,
+	val end: Int,
+) : Parcelable
+
+class ReaderTtsMediaService : Service(), TextToSpeech.OnInitListener {
+	companion object {
+		private const val NOTIFICATION_ID = 46021
+		private const val CHANNEL_ID = "reader_tts_playback"
+		private const val CHANNEL_NAME = "Reader TTS"
+		private const val BASE_SPEED = 0.9
+		private const val TAG = "ReaderTtsMediaService"
+		private const val HEALTH_CHECK_INTERVAL_MS = 1500L
+
+		const val ACTION_INIT = "com.example.reader_app.tts.INIT"
+		const val ACTION_START_READING = "com.example.reader_app.tts.START_READING"
+		const val ACTION_PAUSE = "com.example.reader_app.tts.PAUSE"
+		const val ACTION_RESUME = "com.example.reader_app.tts.RESUME"
+		const val ACTION_STOP = "com.example.reader_app.tts.STOP"
+		const val ACTION_SKIP_FORWARD = "com.example.reader_app.tts.SKIP_FORWARD"
+		const val ACTION_SKIP_BACK = "com.example.reader_app.tts.SKIP_BACK"
+		const val ACTION_SET_SPEED = "com.example.reader_app.tts.SET_SPEED"
+		const val ACTION_SET_VOICE = "com.example.reader_app.tts.SET_VOICE"
+		const val ACTION_SET_BACKGROUND_MODE = "com.example.reader_app.tts.SET_BACKGROUND_MODE"
+
+		const val EXTRA_SEGMENTS = "segments"
+		const val EXTRA_START_INDEX = "startIndex"
+		const val EXTRA_CONTENT_KEY = "contentKey"
+		const val EXTRA_TITLE = "title"
+		const val EXTRA_SPEED = "speed"
+		const val EXTRA_LANGUAGE = "language"
+		const val EXTRA_VOICE_NAME = "voiceName"
+		const val EXTRA_BACKGROUND_MODE_ENABLED = "backgroundModeEnabled"
+		const val EXTRA_CLEAR_CONTENT_KEY = "clearContentKey"
+
+		fun initialize(context: Context, backgroundModeEnabled: Boolean) {
+			context.startService(
+				Intent(context, ReaderTtsMediaService::class.java).apply {
+					action = ACTION_INIT
+					putExtra(EXTRA_BACKGROUND_MODE_ENABLED, backgroundModeEnabled)
+				},
+			)
+		}
+
+		fun startReading(
+			context: Context,
+			segments: ArrayList<ReaderTtsSegment>,
+			startIndex: Int,
+			contentKey: String?,
+			title: String?,
+			speed: Double,
+			language: String,
+			voiceName: String?,
+			backgroundModeEnabled: Boolean,
+		) {
+			ContextCompat.startForegroundService(
+				context,
+				Intent(context, ReaderTtsMediaService::class.java).apply {
+					action = ACTION_START_READING
+					putParcelableArrayListExtra(EXTRA_SEGMENTS, segments)
+					putExtra(EXTRA_START_INDEX, startIndex)
+					putExtra(EXTRA_CONTENT_KEY, contentKey)
+					putExtra(EXTRA_TITLE, title)
+					putExtra(EXTRA_SPEED, speed)
+					putExtra(EXTRA_LANGUAGE, language)
+					putExtra(EXTRA_VOICE_NAME, voiceName)
+					putExtra(EXTRA_BACKGROUND_MODE_ENABLED, backgroundModeEnabled)
+				},
+			)
+		}
+
+		fun pause(context: Context) =
+			context.startService(Intent(context, ReaderTtsMediaService::class.java).apply {
+				action = ACTION_PAUSE
+			})
+
+		fun resume(context: Context) =
+			context.startService(Intent(context, ReaderTtsMediaService::class.java).apply {
+				action = ACTION_RESUME
+			})
+
+		fun stop(context: Context, clearContentKey: Boolean = true) =
+			context.startService(Intent(context, ReaderTtsMediaService::class.java).apply {
+				action = ACTION_STOP
+				putExtra(EXTRA_CLEAR_CONTENT_KEY, clearContentKey)
+			})
+
+		fun skipForward(context: Context) =
+			context.startService(Intent(context, ReaderTtsMediaService::class.java).apply {
+				action = ACTION_SKIP_FORWARD
+			})
+
+		fun skipBack(context: Context) =
+			context.startService(Intent(context, ReaderTtsMediaService::class.java).apply {
+				action = ACTION_SKIP_BACK
+			})
+
+		fun setSpeed(context: Context, speed: Double) =
+			context.startService(Intent(context, ReaderTtsMediaService::class.java).apply {
+				action = ACTION_SET_SPEED
+				putExtra(EXTRA_SPEED, speed)
+			})
+
+		fun setVoice(context: Context, voiceName: String?, language: String?) =
+			context.startService(Intent(context, ReaderTtsMediaService::class.java).apply {
+				action = ACTION_SET_VOICE
+				putExtra(EXTRA_VOICE_NAME, voiceName)
+				putExtra(EXTRA_LANGUAGE, language)
+			})
+
+		fun setBackgroundModeEnabled(context: Context, enabled: Boolean) =
+			context.startService(Intent(context, ReaderTtsMediaService::class.java).apply {
+				action = ACTION_SET_BACKGROUND_MODE
+				putExtra(EXTRA_BACKGROUND_MODE_ENABLED, enabled)
+			})
+	}
+
+	private val mainHandler = Handler(Looper.getMainLooper())
+	private lateinit var notificationManager: NotificationManagerCompat
+	private lateinit var mediaSession: MediaSessionCompat
+	private lateinit var audioManager: AudioManager
+	private var audioFocusRequest: AudioFocusRequest? = null
+	private var tts: TextToSpeech? = null
+	private var isTtsReady = false
+	private var isForegroundActive = false
+	private var status = "idle"
+	private var speed = 0.9
+	private var language = "vi-VN"
+	private var voiceName: String? = null
+	private var contentKey: String? = null
+	private var title: String? = null
+	private var segments: List<ReaderTtsSegment> = emptyList()
+	private var currentIndex = 0
+	private var completedCount = 0
+	private var backgroundModeEnabled = true
+	private var availableVoices: List<Map<String, String>> = emptyList()
+	private var sessionGeneration = 0
+	private var lastStartedUtterance: String? = null
+	private var currentUtteranceId: String? = null
+	private var currentUtteranceStarted = false
+	private var pendingReplayAfterInit = false
+	private var currentSegmentRetry = 0
+	private var consecutiveSilentHealthChecks = 0
+	private var utteranceWatchdog: Runnable? = null
+	private var pausedByAudioFocus = false
+	private var lastSpeakRequestTimeMs = 0L
+	private val playbackHealthRunnable = object : Runnable {
+		override fun run() {
+			runPlaybackHealthCheck()
+			mainHandler.postDelayed(this, HEALTH_CHECK_INTERVAL_MS)
+		}
+	}
+
+	private val audioFocusListener = AudioManager.OnAudioFocusChangeListener { focusChange ->
+		mainHandler.post {
+			when (focusChange) {
+				AudioManager.AUDIOFOCUS_LOSS,
+				AudioManager.AUDIOFOCUS_LOSS_TRANSIENT -> {
+					if (status == "playing") {
+						pausedByAudioFocus = true
+						handlePause()
+					}
+				}
+				AudioManager.AUDIOFOCUS_GAIN -> {
+					if (pausedByAudioFocus && status == "paused") {
+						pausedByAudioFocus = false
+						handleResume()
+					}
+				}
+			}
+		}
+	}
+
+	override fun onCreate() {
+		super.onCreate()
+		notificationManager = NotificationManagerCompat.from(this)
+		audioManager = getSystemService(Context.AUDIO_SERVICE) as AudioManager
+		createNotificationChannel()
+		setupMediaSession()
+		setupTextToSpeech()
+		mainHandler.postDelayed(playbackHealthRunnable, HEALTH_CHECK_INTERVAL_MS)
+		publishSnapshot()
+	}
+
+	override fun onBind(intent: Intent?): IBinder? = null
+
+	override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {
+		when (intent?.action) {
+			ACTION_INIT -> {
+				backgroundModeEnabled = intent.getBooleanExtra(
+					EXTRA_BACKGROUND_MODE_ENABLED,
+					backgroundModeEnabled,
+				)
+				publishSnapshot()
+			}
+			ACTION_START_READING -> handleStartReading(intent)
+			ACTION_PAUSE -> handlePause()
+			ACTION_RESUME -> handleResume()
+			ACTION_STOP -> handleStop(
+				clearContentKey = intent.getBooleanExtra(EXTRA_CLEAR_CONTENT_KEY, true),
+			)
+			ACTION_SKIP_FORWARD -> handleSkip(1)
+			ACTION_SKIP_BACK -> handleSkip(-1)
+			ACTION_SET_SPEED -> {
+				speed = intent.getDoubleExtra(EXTRA_SPEED, speed)
+				applyVoiceAndSpeedSettings()
+				publishSnapshot()
+			}
+			ACTION_SET_VOICE -> {
+				voiceName = intent.getStringExtra(EXTRA_VOICE_NAME)
+				language = intent.getStringExtra(EXTRA_LANGUAGE) ?: language
+				applyVoiceAndSpeedSettings()
+				publishSnapshot()
+			}
+			ACTION_SET_BACKGROUND_MODE -> {
+				backgroundModeEnabled = intent.getBooleanExtra(
+					EXTRA_BACKGROUND_MODE_ENABLED,
+					backgroundModeEnabled,
+				)
+				syncNotificationState()
+				publishSnapshot()
+			}
+		}
+
+		return START_STICKY
+	}
+
+	private fun setupTextToSpeech() {
+		tts = TextToSpeech(applicationContext, this)
+		tts?.setOnUtteranceProgressListener(
+			object : UtteranceProgressListener() {
+				override fun onStart(utteranceId: String?) {
+					if (utteranceId == null) return
+					mainHandler.post {
+						if (!isActiveUtterance(utteranceId)) return@post
+						if (utteranceId != currentUtteranceId) return@post
+						lastStartedUtterance = utteranceId
+						currentUtteranceStarted = true
+						currentSegmentRetry = 0
+						status = "playing"
+						scheduleUtteranceWatchdog(utteranceId)
+						syncNotificationState()
+						publishSnapshot()
+					}
+				}
+
+				override fun onDone(utteranceId: String?) {
+					if (utteranceId == null) return
+					mainHandler.post {
+						if (!isActiveUtterance(utteranceId)) return@post
+						if (utteranceId != currentUtteranceId) return@post
+						clearUtteranceRuntimeState()
+						handleUtteranceCompleted(parseUtteranceIndex(utteranceId))
+					}
+				}
+
+				@Deprecated("Deprecated in Java")
+				override fun onError(utteranceId: String?) {
+					onError(utteranceId, TextToSpeech.ERROR)
+				}
+
+				override fun onError(utteranceId: String?, errorCode: Int) {
+					if (utteranceId == null) return
+					mainHandler.post {
+						if (!isActiveUtterance(utteranceId)) return@post
+						if (utteranceId != currentUtteranceId) return@post
+						clearUtteranceRuntimeState()
+						handlePlaybackFailure()
+					}
+				}
+			},
+		)
+	}
+
+	override fun onInit(initStatus: Int) {
+		isTtsReady = initStatus == TextToSpeech.SUCCESS
+		if (isTtsReady) {
+			refreshAvailableVoices()
+			applyVoiceAndSpeedSettings()
+			if ((pendingReplayAfterInit || status == "playing") && segments.isNotEmpty()) {
+				pendingReplayAfterInit = false
+				speakCurrentSegment(forceRestart = true)
+			}
+		} else {
+			status = "idle"
+		}
+		syncNotificationState()
+		publishSnapshot()
+	}
+
+	private fun refreshAvailableVoices() {
+		val ttsInstance = tts ?: return
+		val vietnameseVoices = ttsInstance.voices
+			?.filter { voice -> voice.locale?.toLanguageTag()?.lowercase()?.startsWith("vi") == true }
+			?.mapNotNull { voice ->
+				val locale = voice.locale?.toLanguageTag() ?: return@mapNotNull null
+				mapOf("name" to voice.name, "locale" to locale)
+			}
+			.orEmpty()
+			.distinctBy { voice -> "${voice["name"]}:${voice["locale"]}" }
+			.sortedBy { voice -> voice["name"] }
+
+		availableVoices = vietnameseVoices
+		if (voiceName.isNullOrBlank()) {
+			val preferred = vietnameseVoices.firstOrNull { voice ->
+				val normalized = voice["name"]?.lowercase().orEmpty()
+				normalized.contains("female") || normalized.contains("natural")
+			} ?: vietnameseVoices.firstOrNull()
+			voiceName = preferred?.get("name")
+			language = preferred?.get("locale") ?: language
+		}
+	}
+
+	private fun applyVoiceAndSpeedSettings() {
+		val ttsInstance = tts ?: return
+		ttsInstance.setSpeechRate(speed.toFloat())
+		val locale = language.toLocale()
+		ttsInstance.setLanguage(locale)
+		val matchingVoice = ttsInstance.voices?.firstOrNull { voice ->
+			voice.name == voiceName && voice.locale?.toLanguageTag() == language
+		}
+		if (matchingVoice != null) {
+			ttsInstance.voice = matchingVoice
+		}
+	}
+
+	private fun handleStartReading(intent: Intent) {
+		backgroundModeEnabled = intent.getBooleanExtra(
+			EXTRA_BACKGROUND_MODE_ENABLED,
+			backgroundModeEnabled,
+		)
+		speed = intent.getDoubleExtra(EXTRA_SPEED, speed)
+		language = intent.getStringExtra(EXTRA_LANGUAGE) ?: language
+		voiceName = intent.getStringExtra(EXTRA_VOICE_NAME)
+		contentKey = intent.getStringExtra(EXTRA_CONTENT_KEY)
+		title = intent.getStringExtra(EXTRA_TITLE)
+		segments = extractSegments(intent)
+		currentIndex = intent.getIntExtra(EXTRA_START_INDEX, 0)
+			.coerceIn(0, (segments.size - 1).coerceAtLeast(0))
+		sessionGeneration += 1
+		clearUtteranceRuntimeState()
+		status = "playing"
+		pausedByAudioFocus = false
+		pendingReplayAfterInit = false
+		tts?.stop()
+		publishSnapshot()
+
+		if (!isTtsReady) return
+		speakCurrentSegment(forceRestart = true)
+	}
+
+	private fun handlePause() {
+		if (status != "playing") return
+		sessionGeneration += 1
+		clearUtteranceRuntimeState()
+		status = "paused"
+		pendingReplayAfterInit = false
+		tts?.stop()
+		syncNotificationState()
+		publishSnapshot()
+	}
+
+	private fun handleResume() {
+		if (segments.isEmpty()) return
+		status = "playing"
+		sessionGeneration += 1
+		clearUtteranceRuntimeState()
+		pendingReplayAfterInit = false
+		publishSnapshot()
+		if (!isTtsReady) return
+		speakCurrentSegment(forceRestart = true)
+	}
+
+	private fun handleStop(clearContentKey: Boolean) {
+		sessionGeneration += 1
+		clearUtteranceRuntimeState()
+		status = "idle"
+		currentIndex = 0
+		segments = emptyList()
+		title = null
+		if (clearContentKey) {
+			contentKey = null
+		}
+		tts?.stop()
+		abandonAudioFocus()
+		syncNotificationState()
+		publishSnapshot()
+		stopSelf()
+	}
+
+	private fun handleSkip(direction: Int) {
+		if (segments.isEmpty()) return
+		val nextIndex = (currentIndex + direction).coerceIn(0, segments.lastIndex)
+		if (nextIndex == currentIndex && status == "idle") return
+		currentIndex = nextIndex
+		sessionGeneration += 1
+		clearUtteranceRuntimeState()
+		status = "playing"
+		pendingReplayAfterInit = false
+		tts?.stop()
+		publishSnapshot()
+		if (!isTtsReady) return
+		speakCurrentSegment(forceRestart = true)
+	}
+
+	private fun handleUtteranceCompleted(completedIndex: Int) {
+		if (status != "playing") return
+		if (completedIndex != currentIndex) return
+
+		val nextIndex = currentIndex + 1
+		if (nextIndex >= segments.size) {
+			status = "idle"
+			currentIndex = 0
+			completedCount += 1
+			clearUtteranceRuntimeState()
+			abandonAudioFocus()
+			syncNotificationState()
+			publishSnapshot()
+			stopSelf()
+			return
+		}
+
+		currentIndex = nextIndex
+		speakCurrentSegment(forceRestart = false)
+	}
+
+	private fun handlePlaybackFailure() {
+		status = "idle"
+		clearUtteranceRuntimeState()
+		pendingReplayAfterInit = false
+		abandonAudioFocus()
+		syncNotificationState()
+		publishSnapshot()
+		stopSelf()
+	}
+
+	private fun speakCurrentSegment(forceRestart: Boolean) {
+		if (segments.isEmpty() || !isTtsReady) return
+		if (!requestAudioFocus()) {
+			handlePlaybackFailure()
+			return
+		}
+
+		val segment = segments.getOrNull(currentIndex) ?: run {
+			handlePlaybackFailure()
+			return
+		}
+
+		applyVoiceAndSpeedSettings()
+		status = "playing"
+		// Reset retry counter when advancing to a new segment; keep it when retrying same segment.
+		if (!forceRestart) {
+			currentSegmentRetry = 0
+		}
+		syncNotificationState()
+		publishSnapshot()
+
+		val utteranceId = "${sessionGeneration}:${currentIndex}:${System.nanoTime()}"
+		lastStartedUtterance = if (forceRestart) null else lastStartedUtterance
+		currentUtteranceId = utteranceId
+		currentUtteranceStarted = false
+		lastSpeakRequestTimeMs = System.currentTimeMillis()
+		scheduleUtteranceWatchdog(utteranceId)
+		val speakResult = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
+			tts?.speak(segment.text, TextToSpeech.QUEUE_FLUSH, Bundle(), utteranceId)
+		} else {
+			@Suppress("DEPRECATION")
+			tts?.speak(segment.text, TextToSpeech.QUEUE_FLUSH, null)
+		}
+
+		if (speakResult == TextToSpeech.ERROR) {
+			recoverFromSilentPlayback("speak_error")
+		}
+	}
+
+	private fun scheduleUtteranceWatchdog(utteranceId: String) {
+		clearUtteranceWatchdog()
+		val segment = currentSegment() ?: return
+		val timeoutMs = estimateUtteranceTimeoutMs(segment.text)
+		val guard = Runnable {
+			if (status != "playing") return@Runnable
+			if (utteranceId != currentUtteranceId) return@Runnable
+			recoverFromSilentPlayback("watchdog_timeout")
+		}
+		utteranceWatchdog = guard
+		mainHandler.postDelayed(guard, timeoutMs)
+	}
+
+	private fun clearUtteranceWatchdog() {
+		utteranceWatchdog?.let(mainHandler::removeCallbacks)
+		utteranceWatchdog = null
+	}
+
+	private fun clearUtteranceRuntimeState() {
+		clearUtteranceWatchdog()
+		lastStartedUtterance = null
+		currentUtteranceId = null
+		currentUtteranceStarted = false
+		consecutiveSilentHealthChecks = 0
+	}
+
+	private fun estimateUtteranceTimeoutMs(text: String): Long {
+		val safeSpeed = speed.coerceIn(0.2, 1.5)
+		val multiplier = (BASE_SPEED / safeSpeed).coerceIn(0.5, 3.0)
+		// Use 200ms/char (was 90ms) and a larger 10s buffer so the watchdog does not
+		// fire prematurely for longer Vietnamese sentences (e.g. ~150 chars ≈ 17 s at 0.9×).
+		val estimate = (text.length * 200L * multiplier).toLong() + 10_000L
+		return estimate.coerceIn(15_000L, 180_000L)
+	}
+
+	private fun recoverFromSilentPlayback(reason: String) {
+		if (status != "playing") return
+		Log.w(TAG, "Recover from silent playback: $reason (index=$currentIndex retry=$currentSegmentRetry)")
+		if (segments.isEmpty()) {
+			handlePlaybackFailure()
+			return
+		}
+
+		clearUtteranceRuntimeState()
+		if (currentSegmentRetry >= 2) {
+			handlePlaybackFailure()
+			return
+		}
+
+		currentSegmentRetry += 1
+		if (currentSegmentRetry >= 2) {
+			rebuildTtsEngineForRecovery(reason)
+			return
+		}
+
+		tts?.stop()
+		speakCurrentSegment(forceRestart = true)
+	}
+
+	private fun rebuildTtsEngineForRecovery(reason: String) {
+		Log.w(TAG, "Rebuilding TextToSpeech engine for recovery: $reason")
+		pendingReplayAfterInit = true
+		isTtsReady = false
+		tts?.stop()
+		tts?.shutdown()
+		setupTextToSpeech()
+	}
+
+	private fun runPlaybackHealthCheck() {
+		if (status != "playing") return
+		if (segments.isEmpty()) return
+
+		val ttsInstance = tts
+		if (ttsInstance == null) {
+			rebuildTtsEngineForRecovery("tts_instance_null")
+			return
+		}
+
+		if (!isTtsReady) {
+			if (!pendingReplayAfterInit) {
+				rebuildTtsEngineForRecovery("tts_not_ready")
+			}
+			return
+		}
+
+		val isSpeaking = try {
+			ttsInstance.isSpeaking
+		} catch (_: Exception) {
+			false
+		}
+
+		if (!currentUtteranceStarted) {
+			if (!isSpeaking) {
+				// Allow a grace period after speak() is called before flagging as silent.
+				// onStart typically fires within ~100 ms; 4 s covers slow TTS initialisation.
+				val elapsedSinceSpeak = System.currentTimeMillis() - lastSpeakRequestTimeMs
+				if (elapsedSinceSpeak > 4_000L) {
+					recoverFromSilentPlayback("no_onStart_and_not_speaking")
+				}
+			}
+			return
+		}
+
+		if (isSpeaking) {
+			consecutiveSilentHealthChecks = 0
+			return
+		}
+
+		consecutiveSilentHealthChecks += 1
+		if (consecutiveSilentHealthChecks < 2) {
+			return
+		}
+
+		// Engine stopped speaking but onDone was never delivered; advance manually.
+		consecutiveSilentHealthChecks = 0
+		clearUtteranceRuntimeState()
+		handleUtteranceCompleted(currentIndex)
+	}
+
+	private fun requestAudioFocus(): Boolean {
+		return if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+			val request = audioFocusRequest
+				?: AudioFocusRequest.Builder(AudioManager.AUDIOFOCUS_GAIN)
+					.setAudioAttributes(
+						AudioAttributes.Builder()
+							.setUsage(AudioAttributes.USAGE_MEDIA)
+							.setContentType(AudioAttributes.CONTENT_TYPE_SPEECH)
+							.build(),
+					)
+					.setAcceptsDelayedFocusGain(false)
+					.setOnAudioFocusChangeListener(audioFocusListener)
+					.build()
+					.also { audioFocusRequest = it }
+			audioManager.requestAudioFocus(request) == AudioManager.AUDIOFOCUS_REQUEST_GRANTED
+		} else {
+			@Suppress("DEPRECATION")
+			audioManager.requestAudioFocus(
+				audioFocusListener,
+				AudioManager.STREAM_MUSIC,
+				AudioManager.AUDIOFOCUS_GAIN,
+			) == AudioManager.AUDIOFOCUS_REQUEST_GRANTED
+		}
+	}
+
+	private fun abandonAudioFocus() {
+		if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+			audioFocusRequest?.let(audioManager::abandonAudioFocusRequest)
+		} else {
+			@Suppress("DEPRECATION")
+			audioManager.abandonAudioFocus(audioFocusListener)
+		}
+	}
+
+	private fun isActiveUtterance(utteranceId: String): Boolean {
+		val generation = utteranceId.substringBefore(':').toIntOrNull() ?: return false
+		return generation == sessionGeneration
+	}
+
+	private fun parseUtteranceIndex(utteranceId: String): Int {
+		val parts = utteranceId.split(':')
+		return parts.getOrNull(1)?.toIntOrNull() ?: currentIndex
+	}
+
+	private fun currentSegment(): ReaderTtsSegment? = segments.getOrNull(currentIndex)
+
+	private fun currentProgressLabel(): String {
+		if (segments.isEmpty()) return voiceName ?: language
+		return "Câu ${currentIndex + 1}/${segments.size}"
+	}
+
+	private fun appLabel(): String = applicationInfo.loadLabel(packageManager).toString()
+
+	private fun buildLaunchIntent(): PendingIntent? {
+		val launchIntent = packageManager.getLaunchIntentForPackage(packageName)?.apply {
+			flags = Intent.FLAG_ACTIVITY_SINGLE_TOP or Intent.FLAG_ACTIVITY_CLEAR_TOP
+		}
+		return launchIntent?.let {
+			PendingIntent.getActivity(
+				this,
+				100,
+				it,
+				PendingIntent.FLAG_UPDATE_CURRENT or PendingIntent.FLAG_IMMUTABLE,
+			)
+		}
+	}
+
+	private fun buildServicePendingIntent(action: String): PendingIntent {
+		return PendingIntent.getService(
+			this,
+			action.hashCode(),
+			Intent(this, ReaderTtsMediaService::class.java).apply {
+				this.action = action
+				if (action == ACTION_STOP) {
+					putExtra(EXTRA_CLEAR_CONTENT_KEY, true)
+				}
+			},
+			PendingIntent.FLAG_UPDATE_CURRENT or PendingIntent.FLAG_IMMUTABLE,
+		)
+	}
+
+	@SuppressLint("MissingPermission")
+	private fun buildNotification() = NotificationCompat.Builder(this, CHANNEL_ID)
+		.setSmallIcon(R.mipmap.ic_launcher)
+		.setContentTitle(title ?: appLabel())
+		.setContentText(currentProgressLabel())
+		.setContentIntent(buildLaunchIntent())
+		.setDeleteIntent(buildServicePendingIntent(ACTION_STOP))
+		.setOnlyAlertOnce(true)
+		.setOngoing(status == "playing")
+		.setVisibility(NotificationCompat.VISIBILITY_PUBLIC)
+		.setCategory(NotificationCompat.CATEGORY_TRANSPORT)
+		.addAction(
+			android.R.drawable.ic_media_previous,
+			"Lùi câu",
+			buildServicePendingIntent(ACTION_SKIP_BACK),
+		)
+		.addAction(
+			if (status == "playing") android.R.drawable.ic_media_pause else android.R.drawable.ic_media_play,
+			if (status == "playing") "Tạm dừng" else "Tiếp tục",
+			buildServicePendingIntent(if (status == "playing") ACTION_PAUSE else ACTION_RESUME),
+		)
+		.addAction(
+			android.R.drawable.ic_menu_close_clear_cancel,
+			"Dừng",
+			buildServicePendingIntent(ACTION_STOP),
+		)
+		.addAction(
+			android.R.drawable.ic_media_next,
+			"Tới câu",
+			buildServicePendingIntent(ACTION_SKIP_FORWARD),
+		)
+		.setStyle(
+			MediaStyle()
+				.setMediaSession(mediaSession.sessionToken)
+				.setShowActionsInCompactView(0, 1, 3),
+		)
+		.build()
+
+	private fun setupMediaSession() {
+		mediaSession = MediaSessionCompat(this, "ReaderTtsMediaSession")
+		mediaSession.setCallback(
+			object : MediaSessionCompat.Callback() {
+				override fun onPlay() = handleResume()
+				override fun onPause() = handlePause()
+				override fun onStop() = handleStop(clearContentKey = true)
+				override fun onSkipToNext() = handleSkip(1)
+				override fun onSkipToPrevious() = handleSkip(-1)
+			},
+		)
+		mediaSession.isActive = true
+		updateMediaSessionState()
+	}
+
+	private fun updateMediaSessionState() {
+		val playbackState = when (status) {
+			"playing" -> PlaybackStateCompat.STATE_PLAYING
+			"paused" -> PlaybackStateCompat.STATE_PAUSED
+			else -> PlaybackStateCompat.STATE_STOPPED
+		}
+		val actions = PlaybackStateCompat.ACTION_PLAY or
+			PlaybackStateCompat.ACTION_PAUSE or
+			PlaybackStateCompat.ACTION_STOP or
+			PlaybackStateCompat.ACTION_SKIP_TO_NEXT or
+			PlaybackStateCompat.ACTION_SKIP_TO_PREVIOUS
+
+		mediaSession.setPlaybackState(
+			PlaybackStateCompat.Builder()
+				.setActions(actions)
+				.setState(playbackState, currentIndex.toLong(), 1.0f)
+				.build(),
+		)
+		mediaSession.setMetadata(
+			MediaMetadataCompat.Builder()
+				.putString(MediaMetadataCompat.METADATA_KEY_TITLE, title ?: appLabel())
+				.putString(MediaMetadataCompat.METADATA_KEY_ARTIST, currentProgressLabel())
+				.build(),
+		)
+	}
+
+	@SuppressLint("MissingPermission")
+	private fun syncNotificationState() {
+		updateMediaSessionState()
+		if (!backgroundModeEnabled) {
+			if (isForegroundActive) {
+				stopForeground(true)
+				isForegroundActive = false
+			}
+			notificationManager.cancel(NOTIFICATION_ID)
+			return
+		}
+
+		when (status) {
+			"playing" -> {
+				val notification = buildNotification()
+				if (!isForegroundActive) {
+					startForeground(NOTIFICATION_ID, notification)
+					isForegroundActive = true
+				} else {
+					notificationManager.notify(NOTIFICATION_ID, notification)
+				}
+			}
+			"paused" -> {
+				val notification = buildNotification()
+				if (isForegroundActive) {
+					stopForeground(false)
+					isForegroundActive = false
+				}
+				notificationManager.notify(NOTIFICATION_ID, notification)
+			}
+			else -> {
+				if (isForegroundActive) {
+					stopForeground(true)
+					isForegroundActive = false
+				}
+				notificationManager.cancel(NOTIFICATION_ID)
+			}
+		}
+	}
+
+	private fun publishSnapshot() {
+		val segment = currentSegment()
+		val canExposeSegmentProgress = status == "playing" && currentUtteranceStarted
+		ReaderTtsMediaBridge.publish(
+			hashMapOf(
+				"status" to status,
+				"paragraphIndex" to currentIndex,
+				"totalParagraphs" to segments.size,
+				"activeParagraphIndex" to if (canExposeSegmentProgress) {
+					(segment?.paragraphIndex ?: -1)
+				} else {
+					-1
+				},
+				"progressStart" to if (canExposeSegmentProgress) {
+					(segment?.start ?: -1)
+				} else {
+					-1
+				},
+				"progressEnd" to if (canExposeSegmentProgress) {
+					(segment?.end ?: -1)
+				} else {
+					-1
+				},
+				"contentKey" to contentKey,
+				"completedCount" to completedCount,
+				"backgroundModeEnabled" to backgroundModeEnabled,
+				"language" to language,
+				"voiceName" to voiceName,
+				"availableVietnameseVoices" to availableVoices,
+			),
+		)
+	}
+
+	private fun createNotificationChannel() {
+		if (Build.VERSION.SDK_INT < Build.VERSION_CODES.O) return
+		val manager = getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
+		val channel = NotificationChannel(
+			CHANNEL_ID,
+			CHANNEL_NAME,
+			NotificationManager.IMPORTANCE_LOW,
+		).apply {
+			description = "Điều khiển đọc truyện bằng TTS"
+			setShowBadge(false)
+		}
+		manager.createNotificationChannel(channel)
+	}
+
+	private fun extractSegments(intent: Intent): List<ReaderTtsSegment> {
+		return if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
+			intent.getParcelableArrayListExtra(EXTRA_SEGMENTS, ReaderTtsSegment::class.java)
+				?: arrayListOf()
+		} else {
+			@Suppress("DEPRECATION")
+			(intent.getParcelableArrayListExtra<ReaderTtsSegment>(EXTRA_SEGMENTS)
+				?: arrayListOf())
+		}
+	}
+
+	override fun onDestroy() {
+		mainHandler.removeCallbacks(playbackHealthRunnable)
+		status = "idle"
+		currentIndex = 0
+		segments = emptyList()
+		clearUtteranceRuntimeState()
+		pendingReplayAfterInit = false
+		publishSnapshot()
+		tts?.stop()
+		tts?.shutdown()
+		abandonAudioFocus()
+		if (isForegroundActive) {
+			stopForeground(true)
+			isForegroundActive = false
+		}
+		mediaSession.release()
+		super.onDestroy()
+	}
+}
+
+private fun String.toLocale(): Locale {
+	val normalized = replace('_', '-')
+	return Locale.forLanguageTag(normalized).takeIf { it.language.isNotBlank() }
+		?: Locale("vi", "VN")
+}
+
+
+
+
+
+
+
+
+
+
+
+

devtools_options.yaml

@@ -0,0 +1,3 @@
+description: This file stores settings for Dart & Flutter DevTools.
+documentation: https://docs.flutter.dev/tools/devtools/extensions#configure-extension-enablement-states
+extensions:

ios/Runner.xcodeproj/project.pbxproj

@@ -431,7 +431,7 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				ALWAYS_SEARCH_USER_PATHS = NO;
-				ASSETCATALOG_COMPILER_GENERATE_SWIFT_ASSET_SYMBOL_EXTENSIONS = YES;
+				ASSETCATALOG_COMPILER_GENERATE_SWIFT_ASSET_SYMBOL_EXTENSIONS = AppIcon;
 				CLANG_ANALYZER_NONNULL = YES;
 				CLANG_CXX_LANGUAGE_STANDARD = "gnu++0x";
 				CLANG_CXX_LIBRARY = "libc++";
@@ -488,7 +488,7 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				ALWAYS_SEARCH_USER_PATHS = NO;
-				ASSETCATALOG_COMPILER_GENERATE_SWIFT_ASSET_SYMBOL_EXTENSIONS = YES;
+				ASSETCATALOG_COMPILER_GENERATE_SWIFT_ASSET_SYMBOL_EXTENSIONS = AppIcon;
 				CLANG_ANALYZER_NONNULL = YES;
 				CLANG_CXX_LANGUAGE_STANDARD = "gnu++0x";
 				CLANG_CXX_LIBRARY = "libc++";

ios/Runner/Assets.xcassets/AppIcon.appiconset/Contents.json

@@ -1,122 +1 @@
-{
-  "images" : [
-    {
-      "size" : "20x20",
-      "idiom" : "iphone",
-      "filename" : "Icon-App-20x20@2x.png",
-      "scale" : "2x"
-    },
-    {
-      "size" : "20x20",
-      "idiom" : "iphone",
-      "filename" : "Icon-App-20x20@3x.png",
-      "scale" : "3x"
-    },
-    {
-      "size" : "29x29",
-      "idiom" : "iphone",
-      "filename" : "Icon-App-29x29@1x.png",
-      "scale" : "1x"
-    },
-    {
-      "size" : "29x29",
-      "idiom" : "iphone",
-      "filename" : "Icon-App-29x29@2x.png",
-      "scale" : "2x"
-    },
-    {
-      "size" : "29x29",
-      "idiom" : "iphone",
-      "filename" : "Icon-App-29x29@3x.png",
-      "scale" : "3x"
-    },
-    {
-      "size" : "40x40",
-      "idiom" : "iphone",
-      "filename" : "Icon-App-40x40@2x.png",
-      "scale" : "2x"
-    },
-    {
-      "size" : "40x40",
-      "idiom" : "iphone",
-      "filename" : "Icon-App-40x40@3x.png",
-      "scale" : "3x"
-    },
-    {
-      "size" : "60x60",
-      "idiom" : "iphone",
-      "filename" : "Icon-App-60x60@2x.png",
-      "scale" : "2x"
-    },
-    {
-      "size" : "60x60",
-      "idiom" : "iphone",
-      "filename" : "Icon-App-60x60@3x.png",
-      "scale" : "3x"
-    },
-    {
-      "size" : "20x20",
-      "idiom" : "ipad",
-      "filename" : "Icon-App-20x20@1x.png",
-      "scale" : "1x"
-    },
-    {
-      "size" : "20x20",
-      "idiom" : "ipad",
-      "filename" : "Icon-App-20x20@2x.png",
-      "scale" : "2x"
-    },
-    {
-      "size" : "29x29",
-      "idiom" : "ipad",
-      "filename" : "Icon-App-29x29@1x.png",
-      "scale" : "1x"
-    },
-    {
-      "size" : "29x29",
-      "idiom" : "ipad",
-      "filename" : "Icon-App-29x29@2x.png",
-      "scale" : "2x"
-    },
-    {
-      "size" : "40x40",
-      "idiom" : "ipad",
-      "filename" : "Icon-App-40x40@1x.png",
-      "scale" : "1x"
-    },
-    {
-      "size" : "40x40",
-      "idiom" : "ipad",
-      "filename" : "Icon-App-40x40@2x.png",
-      "scale" : "2x"
-    },
-    {
-      "size" : "76x76",
-      "idiom" : "ipad",
-      "filename" : "Icon-App-76x76@1x.png",
-      "scale" : "1x"
-    },
-    {
-      "size" : "76x76",
-      "idiom" : "ipad",
-      "filename" : "Icon-App-76x76@2x.png",
-      "scale" : "2x"
-    },
-    {
-      "size" : "83.5x83.5",
-      "idiom" : "ipad",
-      "filename" : "Icon-App-83.5x83.5@2x.png",
-      "scale" : "2x"
-    },
-    {
-      "size" : "1024x1024",
-      "idiom" : "ios-marketing",
-      "filename" : "Icon-App-1024x1024@1x.png",
-      "scale" : "1x"
-    }
-  ],
-  "info" : {
-    "version" : 1,
-    "author" : "xcode"
-  }
-}
+{"images":[{"size":"20x20","idiom":"iphone","filename":"Icon-App-20x20@2x.png","scale":"2x"},{"size":"20x20","idiom":"iphone","filename":"Icon-App-20x20@3x.png","scale":"3x"},{"size":"29x29","idiom":"iphone","filename":"Icon-App-29x29@1x.png","scale":"1x"},{"size":"29x29","idiom":"iphone","filename":"Icon-App-29x29@2x.png","scale":"2x"},{"size":"29x29","idiom":"iphone","filename":"Icon-App-29x29@3x.png","scale":"3x"},{"size":"40x40","idiom":"iphone","filename":"Icon-App-40x40@2x.png","scale":"2x"},{"size":"40x40","idiom":"iphone","filename":"Icon-App-40x40@3x.png","scale":"3x"},{"size":"57x57","idiom":"iphone","filename":"Icon-App-57x57@1x.png","scale":"1x"},{"size":"57x57","idiom":"iphone","filename":"Icon-App-57x57@2x.png","scale":"2x"},{"size":"60x60","idiom":"iphone","filename":"Icon-App-60x60@2x.png","scale":"2x"},{"size":"60x60","idiom":"iphone","filename":"Icon-App-60x60@3x.png","scale":"3x"},{"size":"20x20","idiom":"ipad","filename":"Icon-App-20x20@1x.png","scale":"1x"},{"size":"20x20","idiom":"ipad","filename":"Icon-App-20x20@2x.png","scale":"2x"},{"size":"29x29","idiom":"ipad","filename":"Icon-App-29x29@1x.png","scale":"1x"},{"size":"29x29","idiom":"ipad","filename":"Icon-App-29x29@2x.png","scale":"2x"},{"size":"40x40","idiom":"ipad","filename":"Icon-App-40x40@1x.png","scale":"1x"},{"size":"40x40","idiom":"ipad","filename":"Icon-App-40x40@2x.png","scale":"2x"},{"size":"50x50","idiom":"ipad","filename":"Icon-App-50x50@1x.png","scale":"1x"},{"size":"50x50","idiom":"ipad","filename":"Icon-App-50x50@2x.png","scale":"2x"},{"size":"72x72","idiom":"ipad","filename":"Icon-App-72x72@1x.png","scale":"1x"},{"size":"72x72","idiom":"ipad","filename":"Icon-App-72x72@2x.png","scale":"2x"},{"size":"76x76","idiom":"ipad","filename":"Icon-App-76x76@1x.png","scale":"1x"},{"size":"76x76","idiom":"ipad","filename":"Icon-App-76x76@2x.png","scale":"2x"},{"size":"83.5x83.5","idiom":"ipad","filename":"Icon-App-83.5x83.5@2x.png","scale":"2x"},{"size":"1024x1024","idiom":"ios-marketing","filename":"Icon-App-1024x1024@1x.png","scale":"1x"}],"info":{"version":1,"author":"xcode"}}

ios/Runner/Info.plist

@@ -7,7 +7,7 @@
 	<key>CFBundleDevelopmentRegion</key>
 	<string>$(DEVELOPMENT_LANGUAGE)</string>
 	<key>CFBundleDisplayName</key>
-	<string>Reader App</string>
+	<string>Virtus's Reader</string>
 	<key>CFBundleExecutable</key>
 	<string>$(EXECUTABLE_NAME)</string>
 	<key>CFBundleIdentifier</key>

lib/app/router/app_router.dart

@@ -1,3 +1,4 @@
+import 'package:flutter/foundation.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 import 'package:go_router/go_router.dart';
 
@@ -36,7 +37,16 @@ final appRouterProvider = Provider<GoRouter>((ref) {
           ),
           GoRoute(
             path: RouteNames.search,
-            builder: (context, state) => const SearchScreen(),
+            builder: (context, state) {
+              final query = state.uri.queryParameters;
+              return SearchScreen(
+                key: ValueKey(state.uri.toString()),
+                initialQuery: query['q'],
+                initialGenre: query['genre'],
+                initialStatus: query['status'],
+                initialSort: query['sort'] ?? 'latest',
+              );
+            },
           ),
           GoRoute(
             path: RouteNames.genres,

lib/features/novel/providers/novels_provider.dart

@@ -23,11 +23,40 @@ class BrowseParams {
     this.page = 1,
   });
 
+  String? _normalizedStatus() {
+    final raw = status?.trim();
+    if (raw == null || raw.isEmpty) return null;
+    switch (raw.toLowerCase()) {
+      case 'ongoing':
+        return 'Đang ra';
+      case 'completed':
+        return 'Hoàn thành';
+      case 'hiatus':
+        return 'Tạm ngưng';
+      default:
+        return raw;
+    }
+  }
+
+  String _normalizedSort() {
+    final raw = sort.trim();
+    if (raw.isEmpty) return 'latest';
+    switch (raw.toLowerCase()) {
+      case 'latest':
+      case 'popular':
+      case 'rating':
+      case 'name':
+        return raw.toLowerCase();
+      default:
+        return 'latest';
+    }
+  }
+
   Map<String, dynamic> toQueryParams() => {
         if (query != null && query!.isNotEmpty) 'q': query,
         if (genre != null) 'genre': genre,
-        if (status != null) 'status': status,
-        'sort': sort,
+        if (_normalizedStatus() != null) 'status': _normalizedStatus(),
+        'sort': _normalizedSort(),
         'page': page.toString(),
         'limit': '20',
       };
@@ -56,18 +85,39 @@ class BrowseResult {
   final int totalCount;
   final int totalPages;
   final int currentPage;
+  final bool isLoadingMore;
 
   const BrowseResult({
     required this.items,
     required this.totalCount,
     required this.totalPages,
     required this.currentPage,
+    this.isLoadingMore = false,
   });
+
+  bool get hasMore => currentPage < totalPages;
+
+  BrowseResult copyWith({
+    List<NovelModel>? items,
+    int? totalCount,
+    int? totalPages,
+    int? currentPage,
+    bool? isLoadingMore,
+  }) {
+    return BrowseResult(
+      items: items ?? this.items,
+      totalCount: totalCount ?? this.totalCount,
+      totalPages: totalPages ?? this.totalPages,
+      currentPage: currentPage ?? this.currentPage,
+      isLoadingMore: isLoadingMore ?? this.isLoadingMore,
+    );
+  }
 }
 
 class NovelsNotifier extends StateNotifier<AsyncValue<BrowseResult>> {
   final Ref _ref;
   BrowseParams _params = const BrowseParams();
+  bool _isLoadingMore = false;
 
   NovelsNotifier(this._ref) : super(const AsyncValue.loading()) {
     fetch();
@@ -75,25 +125,53 @@ class NovelsNotifier extends StateNotifier<AsyncValue<BrowseResult>> {
 
   BrowseParams get params => _params;
 
+  Future<BrowseResult> _fetchPage(BrowseParams params) async {
+    final client = _ref.read(apiClientProvider);
+    final res = await client.dio.get('/api/novels/browse', queryParameters: params.toQueryParams());
+    final data = res.data as Map<String, dynamic>;
+    return BrowseResult(
+      items: (data['items'] as List).map((e) => NovelModel.fromJson(e as Map<String, dynamic>)).toList(),
+      totalCount: (data['totalCount'] as num?)?.toInt() ?? 0,
+      totalPages: (data['totalPages'] as num?)?.toInt() ?? 1,
+      currentPage: (data['currentPage'] as num?)?.toInt() ?? params.page,
+    );
+  }
+
   Future<void> fetch({BrowseParams? params}) async {
     if (params != null) _params = params;
     state = const AsyncValue.loading();
     try {
-      final client = _ref.read(apiClientProvider);
-      final res = await client.dio.get('/api/novels/browse', queryParameters: _params.toQueryParams());
-      final data = res.data as Map<String, dynamic>;
-      state = AsyncValue.data(BrowseResult(
-        items: (data['items'] as List).map((e) => NovelModel.fromJson(e as Map<String, dynamic>)).toList(),
-        totalCount: data['totalCount'] as int,
-        totalPages: data['totalPages'] as int,
-        currentPage: data['currentPage'] as int,
-      ));
+      final firstPageParams = _params.copyWith(page: 1);
+      final result = await _fetchPage(firstPageParams);
+      _params = firstPageParams;
+      state = AsyncValue.data(result);
     } catch (e, st) {
       state = AsyncValue.error(e, st);
     }
   }
 
   Future<void> updateParams(BrowseParams params) => fetch(params: params);
+
+  Future<void> loadNextPage() async {
+    final current = state.valueOrNull;
+    if (current == null || !current.hasMore || _isLoadingMore) return;
+
+    _isLoadingMore = true;
+    state = AsyncValue.data(current.copyWith(isLoadingMore: true));
+
+    try {
+      final nextParams = _params.copyWith(page: current.currentPage + 1);
+      final nextPage = await _fetchPage(nextParams);
+      _params = nextParams;
+
+      final merged = [...current.items, ...nextPage.items];
+      state = AsyncValue.data(nextPage.copyWith(items: merged, isLoadingMore: false));
+    } catch (e, st) {
+      state = AsyncValue.error(e, st);
+    } finally {
+      _isLoadingMore = false;
+    }
+  }
 }
 
 final novelsProvider = StateNotifierProvider<NovelsNotifier, AsyncValue<BrowseResult>>((ref) {

lib/features/reader/presentation/reader_screen.dart

@@ -1,5 +1,6 @@
 import 'dart:async';
 
+import 'package:flutter/gestures.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/rendering.dart';
 import 'package:flutter/services.dart';
@@ -74,22 +75,16 @@ class _ReaderScreenState extends ConsumerState<ReaderScreen> {
     required bool isActiveParagraph,
     required int highlightStart,
     required int highlightEnd,
+    required Function(int charOffset) onSentenceTap,
   }) {
-    if (!isActiveParagraph || highlightStart < 0 || highlightEnd <= highlightStart) {
-      return SelectableText(
-        paragraph,
-        textAlign: textAlign,
-        style: style,
-      );
-    }
+    final sentenceMatches = RegExp(r'[^.!?…]+[.!?…]*').allMatches(paragraph).toList();
 
-    final safeStart = highlightStart.clamp(0, paragraph.length);
-    final safeEnd = highlightEnd.clamp(0, paragraph.length);
-    if (safeEnd <= safeStart) {
+    if (sentenceMatches.isEmpty) {
       return SelectableText(
         paragraph,
         textAlign: textAlign,
         style: style,
+        onTap: () => onSentenceTap(0),
       );
     }
 
@@ -98,16 +93,28 @@ class _ReaderScreenState extends ConsumerState<ReaderScreen> {
       fontWeight: FontWeight.w600,
     );
 
-    return RichText(
-      textAlign: textAlign,
-      text: TextSpan(
+    return SelectableText.rich(
+      TextSpan(
         style: style,
-        children: [
-          if (safeStart > 0) TextSpan(text: paragraph.substring(0, safeStart)),
-          TextSpan(text: paragraph.substring(safeStart, safeEnd), style: highlightStyle),
-          if (safeEnd < paragraph.length) TextSpan(text: paragraph.substring(safeEnd)),
-        ],
+        children: sentenceMatches.map((match) {
+          final sentence = match.group(0)!;
+          final start = match.start;
+          final end = match.end;
+
+          final isCurrentSpoken = isActiveParagraph &&
+              highlightStart >= 0 &&
+              highlightEnd > highlightStart &&
+              start >= highlightStart &&
+              end <= highlightEnd;
+
+          return TextSpan(
+            text: sentence,
+            style: isCurrentSpoken ? highlightStyle : null,
+            recognizer: TapGestureRecognizer()..onTap = () => onSentenceTap(start),
+          );
+        }).toList(),
       ),
+      textAlign: textAlign,
     );
   }
 
@@ -181,6 +188,48 @@ class _ReaderScreenState extends ConsumerState<ReaderScreen> {
     });
   }
 
+  /// Handle TTS state transitions that require navigation or restarts.
+  /// Called once from [build] via [ref.listen] — safe to run side effects here.
+  void _onTtsStateChanged(TtsState? previous, TtsState next) {
+    // Guard: only act when something meaningful changed.
+    if (previous == null) return;
+
+    final chapterAsync = ref.read(chapterProvider(widget.chapterId));
+    final chapter = chapterAsync.valueOrNull;
+    if (chapter == null) return;
+
+    // Chapter-completion → auto-advance to next chapter.
+    if (next.completedCount > _lastTtsCompletedCount) {
+      _lastTtsCompletedCount = next.completedCount;
+      if (next.contentKey == chapter.id && chapter.nextChapterId != null) {
+        final nextChapterId = chapter.nextChapterId!;
+        WidgetsBinding.instance.addPostFrameCallback((_) {
+          if (!mounted) return;
+          ref.read(ttsProvider.notifier).scheduleAutoStartForChapter(nextChapterId);
+          context.pushReplacement(RouteNames.readerChapter(nextChapterId));
+        });
+      }
+      return;
+    }
+
+    // Pending auto-start for this chapter (set by previous chapter's completion).
+    if (next.pendingAutoStartChapterId == chapter.id &&
+        _autoStartQueuedChapterId != chapter.id) {
+      _autoStartQueuedChapterId = chapter.id;
+      WidgetsBinding.instance.addPostFrameCallback((_) {
+        if (!mounted) return;
+        final notifier = ref.read(ttsProvider.notifier);
+        notifier.clearPendingAutoStartChapter();
+        notifier.startReading(
+          chapter.content,
+          contentKey: chapter.id,
+          title: 'Chương ${chapter.number}: ${chapter.title}',
+        );
+        _autoStartQueuedChapterId = null;
+      });
+    }
+  }
+
   @override
   void dispose() {
     _uiAutoHideTimer?.cancel();
@@ -686,7 +735,7 @@ class _ReaderScreenState extends ConsumerState<ReaderScreen> {
                                               Wrap(
                                                 spacing: 8,
                                                 runSpacing: 8,
-                                                children: [0.35, 0.45, 0.55, 0.65, 0.8, 1.0].map((speed) {
+                                                children: [0.45, 0.675, 0.9, 1.125, 1.35, 1.8].map((speed) {
                                                   final selected = tts.speed == speed;
                                                   return ChoiceChip(
                                                     label: Text(formatTtsSpeedLabel(speed)),
@@ -790,6 +839,9 @@ class _ReaderScreenState extends ConsumerState<ReaderScreen> {
   Widget build(BuildContext context) {
     final chapterAsync = ref.watch(chapterProvider(widget.chapterId));
     final settings = ref.watch(readingSettingsProvider);
+
+    // Side-effects for TTS state changes (navigation, auto-start).
+    ref.listen<TtsState>(ttsProvider, _onTtsStateChanged);
     Color readerBackground;
     Color readerTextColor;
     Color readerMutedColor;
@@ -835,33 +887,6 @@ class _ReaderScreenState extends ConsumerState<ReaderScreen> {
           final shouldHighlightTts = tts.contentKey == chapter.id &&
               (tts.status == TtsStatus.playing || tts.status == TtsStatus.paused);
 
-          if (tts.completedCount > _lastTtsCompletedCount) {
-            _lastTtsCompletedCount = tts.completedCount;
-            if (tts.contentKey == chapter.id && chapter.nextChapterId != null) {
-              final nextChapterId = chapter.nextChapterId!;
-              WidgetsBinding.instance.addPostFrameCallback((_) {
-                if (!mounted) return;
-                ref.read(ttsProvider.notifier).scheduleAutoStartForChapter(nextChapterId);
-                context.pushReplacement(RouteNames.readerChapter(nextChapterId));
-              });
-            }
-          }
-
-          if (tts.pendingAutoStartChapterId == chapter.id &&
-              _autoStartQueuedChapterId != chapter.id) {
-            _autoStartQueuedChapterId = chapter.id;
-            WidgetsBinding.instance.addPostFrameCallback((_) {
-              if (!mounted) return;
-              final notifier = ref.read(ttsProvider.notifier);
-              notifier.clearPendingAutoStartChapter();
-              notifier.startReading(
-                    chapter.content,
-                    contentKey: chapter.id,
-                    title: 'Chương ${chapter.number}: ${chapter.title}',
-                  );
-              _autoStartQueuedChapterId = null;
-            });
-          }
 
           _maybeAutoScrollToTtsParagraph(tts, paragraphs.length);
           WidgetsBinding.instance.addPostFrameCallback((_) {
@@ -990,6 +1015,15 @@ class _ReaderScreenState extends ConsumerState<ReaderScreen> {
                                                   tts.activeParagraphIndex == index,
                                                 highlightStart: tts.progressStart,
                                                 highlightEnd: tts.progressEnd,
+                                                onSentenceTap: (charOffset) {
+                                                  ref.read(ttsProvider.notifier).startReading(
+                                                    chapter.content,
+                                                    contentKey: chapter.id,
+                                                    title: 'Chương ${chapter.number}: ${chapter.title}',
+                                                    startParagraphIndex: index,
+                                                    startCharOffset: charOffset,
+                                                  );
+                                                },
                                               ),
                                             ),
                                         ],

lib/features/reader/presentation/tts_player_widget.dart

@@ -30,7 +30,7 @@ class TtsPlayerWidget extends ConsumerWidget {
     final tts = ref.watch(ttsProvider);
     final notifier = ref.read(ttsProvider.notifier);
 
-    const speeds = [0.35, 0.45, 0.55, 0.65, 0.8, 1.0];
+    const speeds = [0.45, 0.675, 0.9, 1.125, 1.35, 1.8];
 
     Future<void> start() async {
       if (tts.status == TtsStatus.paused) {

lib/features/reader/tts/tts_service.dart

@@ -7,7 +7,7 @@ import 'package:flutter_tts/flutter_tts.dart';
 
 enum TtsStatus { idle, playing, paused }
 
-const double kTtsBaseSpeechRate = 0.45;
+const double kTtsBaseSpeechRate = 0.9;
 
 double ttsDisplayMultiplier(double speechRate) => speechRate / kTtsBaseSpeechRate;
 
@@ -32,6 +32,13 @@ class _TtsSegment {
   final int paragraphIndex;
   final int start;
   final int end;
+
+  Map<String, Object?> toMap() => {
+    'text': text,
+    'paragraphIndex': paragraphIndex,
+    'start': start,
+    'end': end,
+  };
 }
 
 class TtsVoice {
@@ -65,7 +72,7 @@ class TtsState {
     this.paragraphIndex = 0,
     this.totalParagraphs = 0,
     this.activeParagraphIndex = -1,
-    this.speed = 0.45,
+    this.speed = 0.9,
     this.language = 'vi-VN',
     this.voiceName,
     this.availableVietnameseVoices = const [],
@@ -116,25 +123,48 @@ class TtsState {
         batteryOptimizationIgnored:
             batteryOptimizationIgnored ?? this.batteryOptimizationIgnored,
         pendingAutoStartChapterId: clearPendingAutoStartChapterId
-          ? null
-          : (pendingAutoStartChapterId ?? this.pendingAutoStartChapterId),
+            ? null
+            : (pendingAutoStartChapterId ?? this.pendingAutoStartChapterId),
       );
 
   bool get isPlaying => status == TtsStatus.playing;
 }
 
 class TtsNotifier extends StateNotifier<TtsState> {
-  final FlutterTts _tts = FlutterTts();
-  static const MethodChannel _backgroundChannel = MethodChannel('reader_app/tts_background');
-  List<_TtsSegment> _segments = [];
-  bool _initialized = false;
-  Future<void>? _initFuture;
-
   TtsNotifier() : super(const TtsState()) {
     _initFuture = _init();
   }
 
+  static const MethodChannel _backgroundChannel = MethodChannel(
+    'reader_app/tts_background',
+  );
+  static const MethodChannel _mediaChannel = MethodChannel(
+    'reader_app/tts_media',
+  );
+  static const EventChannel _mediaEventsChannel = EventChannel(
+    'reader_app/tts_media_events',
+  );
+
+  final FlutterTts _tts = FlutterTts();
+  List<_TtsSegment> _segments = [];
+  bool _initialized = false;
+  Future<void>? _initFuture;
+  StreamSubscription<dynamic>? _mediaEventsSub;
+  int _playbackGeneration = 0;
+  bool _isInterruptingPlayback = false;
+  int _pendingFallbackIndex = -1;
+  bool _didStartCurrentFallbackUtterance = false;
+  bool _hasPromptedNotificationSettings = false;
+
+  bool get _useNativeAndroidMediaService => Platform.isAndroid;
+
   Future<void> _init() async {
+    if (_useNativeAndroidMediaService) {
+      await _initAndroidBridge();
+      _initialized = true;
+      return;
+    }
+
     await _tts.awaitSpeakCompletion(true);
     await _tts.setSharedInstance(true);
 
@@ -150,39 +180,85 @@ class TtsNotifier extends StateNotifier<TtsState> {
       );
     }
 
-    if (Platform.isAndroid) {
-      await _tts.setAudioAttributesForNavigation();
-    }
-
-    await _configureVietnameseVoice();
+    await _configureVietnameseVoiceWithFlutterTts();
     await _tts.setSpeechRate(kTtsBaseSpeechRate);
     await _tts.setVolume(1.0);
     await _tts.setPitch(1.0);
 
     _tts.setStartHandler(() {
-      state = state.copyWith(
-        status: TtsStatus.playing,
-      );
+      _didStartCurrentFallbackUtterance = true;
+      final index = _pendingFallbackIndex;
+      if (index >= 0 && index < _segments.length) {
+        final segment = _segments[index];
+        state = state.copyWith(
+          status: TtsStatus.playing,
+          paragraphIndex: index,
+          activeParagraphIndex: segment.paragraphIndex,
+          progressStart: segment.start,
+          progressEnd: segment.end,
+        );
+      } else {
+        state = state.copyWith(status: TtsStatus.playing);
+      }
       unawaited(_syncBackgroundMode());
     });
 
     _tts.setCompletionHandler(() {
-      if (state.status == TtsStatus.playing) {
-        _next();
-      }
+      // Fallback playback progression is driven by _playFallbackFromGeneration.
     });
 
     _tts.setErrorHandler((msg) {
-      state = state.copyWith(status: TtsStatus.idle);
+      if (_isInterruptingPlayback) return;
+      _pendingFallbackIndex = -1;
+      _didStartCurrentFallbackUtterance = false;
+      state = state.copyWith(
+        status: TtsStatus.idle,
+        activeParagraphIndex: -1,
+        progressStart: -1,
+        progressEnd: -1,
+      );
       unawaited(_syncBackgroundMode());
     });
 
     await _syncBackgroundMode();
-
     _initialized = true;
   }
 
-  Future<void> _configureVietnameseVoice() async {
+  Future<void> _initAndroidBridge() async {
+    _mediaEventsSub ??= _mediaEventsChannel.receiveBroadcastStream().listen(
+      _handleAndroidMediaEvent,
+      onError: (_) {
+        state = state.copyWith(
+          status: TtsStatus.idle,
+          activeParagraphIndex: -1,
+          progressStart: -1,
+          progressEnd: -1,
+        );
+      },
+    );
+
+    await _mediaChannel.invokeMethod<void>('initialize', {
+      'backgroundModeEnabled': state.backgroundModeEnabled,
+    });
+
+    final snapshot = await _mediaChannel.invokeMethod<dynamic>('getSnapshot');
+    _applyAndroidSnapshot(snapshot);
+
+    await _ensureAndroidMediaNotificationsEnabled();
+  }
+
+  Future<void> _ensureAndroidMediaNotificationsEnabled() async {
+    if (!_useNativeAndroidMediaService) return;
+    if (_hasPromptedNotificationSettings) return;
+
+    final enabled = await _mediaChannel.invokeMethod<bool>('areNotificationsEnabled') ?? true;
+    if (enabled) return;
+
+    _hasPromptedNotificationSettings = true;
+    await _mediaChannel.invokeMethod<void>('openNotificationSettings');
+  }
+
+  Future<void> _configureVietnameseVoiceWithFlutterTts() async {
     final dynamic voicesRaw = await _tts.getVoices;
 
     String? selectedName;
@@ -191,22 +267,34 @@ class TtsNotifier extends StateNotifier<TtsState> {
 
     if (voicesRaw is List) {
       final vietnamese = voicesRaw.whereType<Map>().where((voice) {
-        final locale = (voice['locale'] ?? voice['language'] ?? '').toString().toLowerCase();
+        final locale = (voice['locale'] ?? voice['language'] ?? '')
+            .toString()
+            .toLowerCase();
         return locale.startsWith('vi');
       }).toList();
 
       for (final voice in vietnamese) {
         final name = voice['name']?.toString();
         final locale = (voice['locale'] ?? voice['language'])?.toString();
-        if (name == null || name.isEmpty || locale == null || locale.isEmpty) continue;
+        if (name == null || name.isEmpty || locale == null || locale.isEmpty) {
+          continue;
+        }
         vietnameseVoices.add(TtsVoice(name: name, locale: locale));
       }
 
       if (vietnamese.isNotEmpty) {
         final preferred = vietnamese.firstWhere(
           (voice) =>
-              (voice['name']?.toString().toLowerCase().contains('female') ?? false) ||
-              (voice['name']?.toString().toLowerCase().contains('natural') ?? false),
+              (voice['name']
+                      ?.toString()
+                      .toLowerCase()
+                      .contains('female') ??
+                  false) ||
+              (voice['name']
+                      ?.toString()
+                      .toLowerCase()
+                      .contains('natural') ??
+                  false),
           orElse: () => vietnamese.first,
         );
         selectedName = preferred['name']?.toString();
@@ -219,6 +307,7 @@ class TtsNotifier extends StateNotifier<TtsState> {
     if (selectedName != null) {
       await _tts.setVoice({'name': selectedName, 'locale': selectedLanguage});
     }
+
     state = state.copyWith(
       language: selectedLanguage,
       voiceName: selectedName,
@@ -226,7 +315,176 @@ class TtsNotifier extends StateNotifier<TtsState> {
     );
   }
 
+  void _handleAndroidMediaEvent(dynamic event) {
+    _applyAndroidSnapshot(event);
+  }
+
+  void _applyAndroidSnapshot(dynamic snapshot) {
+    if (snapshot is! Map) return;
+
+    final data = Map<String, dynamic>.from(
+      snapshot.map((key, value) => MapEntry(key.toString(), value)),
+    );
+
+    final statusRaw = data['status']?.toString() ?? 'idle';
+    final status = switch (statusRaw) {
+      'playing' => TtsStatus.playing,
+      'paused' => TtsStatus.paused,
+      _ => TtsStatus.idle,
+    };
+
+    final voicesRaw = data['availableVietnameseVoices'];
+    final voices = <TtsVoice>[];
+    if (voicesRaw is List) {
+      for (final item in voicesRaw) {
+        if (item is! Map) continue;
+        final map = Map<String, dynamic>.from(
+          item.map((key, value) => MapEntry(key.toString(), value)),
+        );
+        final name = map['name']?.toString();
+        final locale = map['locale']?.toString();
+        if (name == null || name.isEmpty || locale == null || locale.isEmpty) {
+          continue;
+        }
+        voices.add(TtsVoice(name: name, locale: locale));
+      }
+    }
+
+    state = state.copyWith(
+      status: status,
+      paragraphIndex: (data['paragraphIndex'] as num?)?.toInt() ?? 0,
+      totalParagraphs: (data['totalParagraphs'] as num?)?.toInt() ?? 0,
+      activeParagraphIndex: (data['activeParagraphIndex'] as num?)?.toInt() ?? -1,
+      progressStart: (data['progressStart'] as num?)?.toInt() ?? -1,
+      progressEnd: (data['progressEnd'] as num?)?.toInt() ?? -1,
+      contentKey: data['contentKey']?.toString(),
+      completedCount: (data['completedCount'] as num?)?.toInt() ?? state.completedCount,
+      language: data['language']?.toString() ?? state.language,
+      voiceName: data['voiceName']?.toString(),
+      availableVietnameseVoices: voices,
+      backgroundModeEnabled:
+          data['backgroundModeEnabled'] as bool? ?? state.backgroundModeEnabled,
+    );
+  }
+
+  String _sanitizeForTts(String raw) {
+    if (raw.isEmpty) return raw;
+
+    // Keep natural sentence flow while removing symbols that are usually read out noisily.
+    final cleaned = raw
+        .replaceAll(RegExp(r'[_$#^*+=~`|<>\\\[\]{}]'), ' ')
+        .replaceAll(RegExp(r'\s+'), ' ')
+        .trim();
+
+    return cleaned;
+  }
+
+  List<_TtsSegment> _buildSegments(
+    String content, {
+    String? title,
+    bool includeTitle = true,
+  }) {
+    final segments = <_TtsSegment>[];
+
+    final titleText = title?.trim();
+    if (includeTitle && titleText != null && titleText.isNotEmpty) {
+      final sanitizedTitle = _sanitizeForTts(titleText);
+      if (sanitizedTitle.isNotEmpty) {
+      segments.add(
+        _TtsSegment(
+        text: sanitizedTitle,
+        paragraphIndex: -1,
+        start: -1,
+        end: -1,
+        ),
+      );
+      }
+    }
+
+    final paragraphs = content
+        .split(RegExp(r'\n+'))
+        .map((p) => p.trim())
+        .where((p) => p.isNotEmpty)
+        .toList();
+
+    for (var pIndex = 0; pIndex < paragraphs.length; pIndex++) {
+      final paragraph = paragraphs[pIndex];
+      final sentenceMatches = RegExp(r'[^.!?…]+[.!?…]*').allMatches(paragraph);
+      var cursor = 0;
+
+      for (final match in sentenceMatches) {
+        final sentence = match.group(0)?.trim() ?? '';
+        if (sentence.isEmpty) continue;
+        final sanitizedSentence = _sanitizeForTts(sentence);
+        if (sanitizedSentence.isEmpty) continue;
+
+        var start = paragraph.indexOf(sentence, cursor);
+        if (start < 0) {
+          start = cursor.clamp(0, paragraph.length);
+        }
+
+        final end = (start + sentence.length).clamp(0, paragraph.length);
+        cursor = end;
+
+        segments.add(
+          _TtsSegment(
+            text: sanitizedSentence,
+            paragraphIndex: pIndex,
+            start: start,
+            end: end,
+          ),
+        );
+      }
+    }
+
+    return segments;
+  }
+
+  int _resolveStartIndex(
+    int paragraphIndex, {
+    int? startParagraphIndex,
+    int? startCharOffset,
+  }) {
+    var validIndex = paragraphIndex.clamp(0, _segments.length - 1);
+
+    if (startParagraphIndex != null) {
+      final matchIndex = _segments.indexWhere(
+        (segment) =>
+            segment.paragraphIndex == startParagraphIndex &&
+            (startCharOffset == null || segment.start >= startCharOffset),
+      );
+
+      if (matchIndex >= 0) {
+        validIndex = matchIndex;
+      } else {
+        final fallbackIndex = _segments.indexWhere(
+          (segment) => segment.paragraphIndex >= startParagraphIndex,
+        );
+        if (fallbackIndex >= 0) {
+          validIndex = fallbackIndex;
+        }
+      }
+    }
+
+    return validIndex;
+  }
+
   Future<void> setVoiceByName(String voiceName) async {
+    if (_useNativeAndroidMediaService) {
+      final selected = state.availableVietnameseVoices.where(
+        (voice) => voice.name == voiceName,
+      );
+      if (selected.isEmpty) return;
+
+      final voice = selected.first;
+      await _mediaChannel.invokeMethod<void>('setVoiceByName', {
+        'voiceName': voice.name,
+        'language': voice.locale,
+      });
+      state = state.copyWith(language: voice.locale, voiceName: voice.name);
+      return;
+    }
+
     final selected = state.availableVietnameseVoices.where((v) => v.name == voiceName);
     if (selected.isEmpty) return;
 
@@ -240,6 +498,16 @@ class TtsNotifier extends StateNotifier<TtsState> {
 
   Future<void> setBackgroundModeEnabled(bool enabled) async {
     state = state.copyWith(backgroundModeEnabled: enabled);
+    if (_useNativeAndroidMediaService) {
+      await _mediaChannel.invokeMethod<void>('setBackgroundModeEnabled', {
+        'enabled': enabled,
+      });
+      if (enabled) {
+        await ensureBatteryOptimizationIgnored();
+      }
+      return;
+    }
+
     await _syncBackgroundMode();
     if (enabled) {
       await ensureBatteryOptimizationIgnored();
@@ -278,23 +546,24 @@ class TtsNotifier extends StateNotifier<TtsState> {
   }
 
   Future<void> _syncBackgroundMode() async {
-    if (!Platform.isAndroid) return;
+    if (_useNativeAndroidMediaService || !Platform.isAndroid) return;
 
     final shouldKeepAlive =
         state.backgroundModeEnabled && state.status == TtsStatus.playing;
     try {
-      await _backgroundChannel
-          .invokeMethod<void>('setWakeLock', {'enabled': shouldKeepAlive});
+      await _backgroundChannel.invokeMethod<void>('setWakeLock', {
+        'enabled': shouldKeepAlive,
+      });
     } catch (_) {
       // Keep playback functional even if native wake lock bridge is unavailable.
     }
   }
 
-  /// Start reading from [content] starting at optional [paragraphIndex].
   Future<void> startReading(
     String content, {
     int paragraphIndex = 0,
     int? startParagraphIndex,
+    int? startCharOffset,
     String? contentKey,
     String? title,
     bool includeTitle = true,
@@ -303,133 +572,228 @@ class TtsNotifier extends StateNotifier<TtsState> {
       await (_initFuture ?? _init());
     }
 
-    final segments = <_TtsSegment>[];
+    _segments = _buildSegments(
+      content,
+      title: title,
+      includeTitle: includeTitle,
+    );
 
-    final titleText = title?.trim();
-    if (includeTitle && titleText != null && titleText.isNotEmpty) {
-      segments.add(_TtsSegment(text: titleText, paragraphIndex: -1, start: -1, end: -1));
-    }
-
-    final paragraphs = content
-        .split(RegExp(r'\n+'))
-        .map((p) => p.trim())
-        .where((p) => p.isNotEmpty)
-        .toList();
-
-    for (var pIndex = 0; pIndex < paragraphs.length; pIndex++) {
-      final paragraph = paragraphs[pIndex];
-      final sentenceMatches = RegExp(r'[^.!?…]+[.!?…]*').allMatches(paragraph);
-      var cursor = 0;
-
-      for (final match in sentenceMatches) {
-        final sentence = match.group(0)?.trim() ?? '';
-        if (sentence.isEmpty) continue;
-        var start = paragraph.indexOf(sentence, cursor);
-        if (start < 0) start = cursor.clamp(0, paragraph.length);
-        final end = (start + sentence.length).clamp(0, paragraph.length);
-        cursor = end;
-
-        segments.add(
-          _TtsSegment(
-            text: sentence,
-            paragraphIndex: pIndex,
-            start: start,
-            end: end,
-          ),
-        );
-      }
-    }
-
-    _segments = segments;
-    if (_segments.isEmpty) return;
-
-    var validIndex = paragraphIndex.clamp(0, _segments.length - 1);
-    if (startParagraphIndex != null) {
-      final startFromVisible = _segments.indexWhere(
-        (segment) => segment.paragraphIndex >= startParagraphIndex,
+    if (_segments.isEmpty) {
+      state = state.copyWith(
+        status: TtsStatus.idle,
+        paragraphIndex: 0,
+        totalParagraphs: 0,
+        activeParagraphIndex: -1,
+        progressStart: -1,
+        progressEnd: -1,
+        contentKey: contentKey,
       );
-      if (startFromVisible >= 0) {
-        validIndex = startFromVisible;
+      if (!_useNativeAndroidMediaService) {
+        await _syncBackgroundMode();
       }
+      return;
     }
 
+    final validIndex = _resolveStartIndex(
+      paragraphIndex,
+      startParagraphIndex: startParagraphIndex,
+      startCharOffset: startCharOffset,
+    );
     final selectedSegment = _segments[validIndex];
+
+    if (_useNativeAndroidMediaService) {
+      await _ensureAndroidMediaNotificationsEnabled();
+
+      state = state.copyWith(
+        status: TtsStatus.playing,
+        paragraphIndex: validIndex,
+        totalParagraphs: _segments.length,
+        activeParagraphIndex: selectedSegment.paragraphIndex,
+        progressStart: selectedSegment.start,
+        progressEnd: selectedSegment.end,
+        contentKey: contentKey,
+      );
+
+      await _mediaChannel.invokeMethod<void>('startReading', {
+        'contentKey': contentKey,
+        'title': title,
+        'startIndex': validIndex,
+        'speed': state.speed,
+        'language': state.language,
+        'voiceName': state.voiceName,
+        'backgroundModeEnabled': state.backgroundModeEnabled,
+        'segments': _segments.map((segment) => segment.toMap()).toList(),
+      });
+      return;
+    }
+
+    final sessionId = await _interruptFallbackPlayback();
+
     state = state.copyWith(
       status: TtsStatus.playing,
       paragraphIndex: validIndex,
       totalParagraphs: _segments.length,
-      activeParagraphIndex: selectedSegment.paragraphIndex,
-      progressStart: selectedSegment.start,
-      progressEnd: selectedSegment.end,
+      activeParagraphIndex: -1,
+      progressStart: -1,
+      progressEnd: -1,
       contentKey: contentKey,
     );
     await _syncBackgroundMode();
-    await _speak(validIndex);
+
+    unawaited(_playFallbackFromGeneration(validIndex, sessionId));
   }
 
-  Future<void> _speak(int index) async {
-    if (index >= _segments.length) {
-      state = state.copyWith(
-        status: TtsStatus.idle,
-        activeParagraphIndex: -1,
-        progressStart: -1,
-        progressEnd: -1,
-      );
-      await _syncBackgroundMode();
-      return;
+  Future<int> _interruptFallbackPlayback() async {
+    _playbackGeneration++;
+    _pendingFallbackIndex = -1;
+    _didStartCurrentFallbackUtterance = false;
+    _isInterruptingPlayback = true;
+
+    try {
+      await _tts.stop();
+      if (Platform.isAndroid) {
+        await Future<void>.delayed(const Duration(milliseconds: 120));
+      }
+    } finally {
+      _isInterruptingPlayback = false;
     }
 
-    final segment = _segments[index];
-    state = state.copyWith(
-      paragraphIndex: index,
-      activeParagraphIndex: segment.paragraphIndex,
-      progressStart: segment.start,
-      progressEnd: segment.end,
-    );
-
-    await _tts.setSpeechRate(state.speed);
-    await _tts.speak(segment.text);
+    return _playbackGeneration;
   }
 
-  Future<void> _next() async {
-    final next = state.paragraphIndex + 1;
-    if (next >= state.totalParagraphs) {
+  Future<void> _playFallbackFromGeneration(int startIndex, int generation) async {
+    if (startIndex < 0 || startIndex >= _segments.length) {
       state = state.copyWith(
         status: TtsStatus.idle,
         paragraphIndex: 0,
         activeParagraphIndex: -1,
         progressStart: -1,
         progressEnd: -1,
-        completedCount: state.completedCount + 1,
       );
       await _syncBackgroundMode();
       return;
     }
+
+    for (var index = startIndex; index < _segments.length; index++) {
+      if (generation != _playbackGeneration) return;
+      if (state.status != TtsStatus.playing) return;
+
+      _pendingFallbackIndex = index;
+      _didStartCurrentFallbackUtterance = false;
+
+      state = state.copyWith(
+        status: TtsStatus.playing,
+        paragraphIndex: index,
+        totalParagraphs: _segments.length,
+        activeParagraphIndex: -1,
+        progressStart: -1,
+        progressEnd: -1,
+      );
+      await _syncBackgroundMode();
+
+      await _tts.setSpeechRate(state.speed);
+      final result = await _tts.speak(_segments[index].text);
+
+      if (generation != _playbackGeneration) return;
+      if (state.status != TtsStatus.playing) return;
+
+      if (result is int && result != 1) {
+        state = state.copyWith(
+          status: TtsStatus.idle,
+          activeParagraphIndex: -1,
+          progressStart: -1,
+          progressEnd: -1,
+        );
+        await _syncBackgroundMode();
+        return;
+      }
+
+      if (!_didStartCurrentFallbackUtterance) {
+        state = state.copyWith(
+          status: TtsStatus.idle,
+          activeParagraphIndex: -1,
+          progressStart: -1,
+          progressEnd: -1,
+        );
+        await _syncBackgroundMode();
+        return;
+      }
+    }
+
+    if (generation != _playbackGeneration) return;
+
+    _pendingFallbackIndex = -1;
+    _didStartCurrentFallbackUtterance = false;
+
     state = state.copyWith(
-      paragraphIndex: next,
-      activeParagraphIndex: _segments[next].paragraphIndex,
-      progressStart: _segments[next].start,
-      progressEnd: _segments[next].end,
+      status: TtsStatus.idle,
+      paragraphIndex: 0,
+      activeParagraphIndex: -1,
+      progressStart: -1,
+      progressEnd: -1,
+      completedCount: state.completedCount + 1,
     );
-    await _speak(next);
+    await _syncBackgroundMode();
   }
 
   Future<void> pause() async {
+    if (_useNativeAndroidMediaService) {
+      await _mediaChannel.invokeMethod<void>('pause');
+      return;
+    }
+
+    if (state.status != TtsStatus.playing) return;
+
+    _playbackGeneration++;
     await _tts.pause();
     state = state.copyWith(status: TtsStatus.paused);
     await _syncBackgroundMode();
   }
 
-  Future<void> resume() async {
-    if (state.status != TtsStatus.paused) return;
-    state = state.copyWith(status: TtsStatus.playing);
+  Future<void> _restartFallbackFromIndex(int index) async {
+    if (_segments.isEmpty) return;
+
+    final sessionId = await _interruptFallbackPlayback();
+    final validIndex = index.clamp(0, _segments.length - 1);
+
+    state = state.copyWith(
+      status: TtsStatus.playing,
+      paragraphIndex: validIndex,
+      totalParagraphs: _segments.length,
+      activeParagraphIndex: -1,
+      progressStart: -1,
+      progressEnd: -1,
+    );
     await _syncBackgroundMode();
-    // Use paragraph-level resume for consistent behavior across engines.
-    await _speak(state.paragraphIndex);
+
+    unawaited(_playFallbackFromGeneration(validIndex, sessionId));
+  }
+
+  Future<void> resume() async {
+    if (_useNativeAndroidMediaService) {
+      await _mediaChannel.invokeMethod<void>('resume');
+      return;
+    }
+
+    if (state.status != TtsStatus.paused) return;
+    await _restartFallbackFromIndex(state.paragraphIndex);
   }
 
   Future<void> stop() async {
-    await _tts.stop();
+    if (_useNativeAndroidMediaService) {
+      await _mediaChannel.invokeMethod<void>('stop');
+      state = state.copyWith(
+        status: TtsStatus.idle,
+        paragraphIndex: 0,
+        activeParagraphIndex: -1,
+        progressStart: -1,
+        progressEnd: -1,
+        clearContentKey: true,
+      );
+      return;
+    }
+
+    await _interruptFallbackPlayback();
     state = state.copyWith(
       status: TtsStatus.idle,
       paragraphIndex: 0,
@@ -442,32 +806,53 @@ class TtsNotifier extends StateNotifier<TtsState> {
   }
 
   Future<void> skipForward() async {
-    await _tts.stop();
-    await _next();
+    if (_useNativeAndroidMediaService) {
+      await _mediaChannel.invokeMethod<void>('skipForward');
+      return;
+    }
+
+    if (_segments.isEmpty || state.totalParagraphs <= 0) return;
+
+    final next = state.paragraphIndex + 1;
+    if (next >= _segments.length) {
+      await stop();
+      return;
+    }
+
+    await _restartFallbackFromIndex(next);
   }
 
   Future<void> skipBack() async {
-    await _tts.stop();
-    if (state.totalParagraphs <= 0) return;
-    final prev = (state.paragraphIndex - 1).clamp(0, state.totalParagraphs - 1);
-    state = state.copyWith(
-      paragraphIndex: prev,
-      activeParagraphIndex: _segments[prev].paragraphIndex,
-      progressStart: _segments[prev].start,
-      progressEnd: _segments[prev].end,
-    );
-    if (state.status == TtsStatus.playing) await _speak(prev);
+    if (_useNativeAndroidMediaService) {
+      await _mediaChannel.invokeMethod<void>('skipBack');
+      return;
+    }
+
+    if (_segments.isEmpty || state.totalParagraphs <= 0) return;
+
+    final prev = (state.paragraphIndex - 1).clamp(0, _segments.length - 1);
+    await _restartFallbackFromIndex(prev);
   }
 
   Future<void> setSpeed(double speed) async {
     state = state.copyWith(speed: speed);
+
+    if (_useNativeAndroidMediaService) {
+      await _mediaChannel.invokeMethod<void>('setSpeed', {'speed': speed});
+      return;
+    }
+
     await _tts.setSpeechRate(speed);
   }
 
   @override
   void dispose() {
-    unawaited(_backgroundChannel.invokeMethod<void>('setWakeLock', {'enabled': false}));
-    _tts.stop();
+    _mediaEventsSub?.cancel();
+    if (_useNativeAndroidMediaService) {
+      unawaited(_mediaChannel.invokeMethod<void>('dispose'));
+    } else {
+      unawaited(_tts.stop());
+    }
     super.dispose();
   }
 }

lib/features/search/presentation/search_screen.dart

@@ -10,7 +10,18 @@ import '../../novel/providers/novels_provider.dart';
 import '../../genres/providers/genres_provider.dart';
 
 class SearchScreen extends ConsumerStatefulWidget {
-  const SearchScreen({super.key});
+  const SearchScreen({
+    super.key,
+    this.initialQuery,
+    this.initialGenre,
+    this.initialStatus,
+    this.initialSort = 'latest',
+  });
+
+  final String? initialQuery;
+  final String? initialGenre;
+  final String? initialStatus;
+  final String initialSort;
 
   @override
   ConsumerState<SearchScreen> createState() => _SearchScreenState();
@@ -18,6 +29,7 @@ class SearchScreen extends ConsumerStatefulWidget {
 
 class _SearchScreenState extends ConsumerState<SearchScreen> {
   final _controller = TextEditingController();
+  final _scrollController = ScrollController();
   Timer? _debounce;
   String? _selectedGenre;
   String? _selectedStatus;
@@ -35,13 +47,61 @@ class _SearchScreenState extends ConsumerState<SearchScreen> {
     ('Tên A-Z', 'name'),
   ];
 
+  @override
+  void initState() {
+    super.initState();
+    _scrollController.addListener(_onScroll);
+    _syncFromInitialParams(applyImmediately: false);
+    WidgetsBinding.instance.addPostFrameCallback((_) {
+      if (!mounted) return;
+      _applyFilters();
+    });
+  }
+
+  @override
+  void didUpdateWidget(covariant SearchScreen oldWidget) {
+    super.didUpdateWidget(oldWidget);
+    final hasRouteFilterChange = oldWidget.initialQuery != widget.initialQuery ||
+        oldWidget.initialGenre != widget.initialGenre ||
+        oldWidget.initialStatus != widget.initialStatus ||
+        oldWidget.initialSort != widget.initialSort;
+    if (hasRouteFilterChange) {
+      _syncFromInitialParams(applyImmediately: true);
+    }
+  }
+
   @override
   void dispose() {
+    _scrollController
+      ..removeListener(_onScroll)
+      ..dispose();
     _controller.dispose();
     _debounce?.cancel();
     super.dispose();
   }
 
+  void _onScroll() {
+    if (!_scrollController.hasClients) return;
+    final position = _scrollController.position;
+    if (position.pixels >= position.maxScrollExtent - 240) {
+      ref.read(novelsProvider.notifier).loadNextPage();
+    }
+  }
+
+  void _syncFromInitialParams({required bool applyImmediately}) {
+    final incomingQuery = widget.initialQuery?.trim();
+    _controller.text = incomingQuery == null || incomingQuery.isEmpty ? '' : incomingQuery;
+    _selectedGenre = widget.initialGenre;
+    _selectedStatus = widget.initialStatus;
+    _sort = widget.initialSort;
+    if (applyImmediately) {
+      if (mounted) {
+        setState(() {});
+      }
+      _applyFilters();
+    }
+  }
+
   void _onQueryChanged(String value) {
     _debounce?.cancel();
     _debounce = Timer(const Duration(milliseconds: 500), _applyFilters);
@@ -167,8 +227,25 @@ class _SearchScreenState extends ConsumerState<SearchScreen> {
                   return const Center(child: Text('Không tìm thấy truyện'));
                 }
                 return ListView.builder(
-                  itemCount: result.items.length,
-                  itemBuilder: (context, index) => _NovelListTile(novel: result.items[index]),
+                  controller: _scrollController,
+                  itemCount: result.items.length + (result.hasMore || result.isLoadingMore ? 1 : 0),
+                  itemBuilder: (context, index) {
+                    if (index >= result.items.length) {
+                      if (result.isLoadingMore) {
+                        return const Padding(
+                          padding: EdgeInsets.symmetric(vertical: 16),
+                          child: Center(child: CircularProgressIndicator()),
+                        );
+                      }
+                      // Trigger page load when user reaches the end.
+                      WidgetsBinding.instance.addPostFrameCallback((_) {
+                        if (!mounted) return;
+                        ref.read(novelsProvider.notifier).loadNextPage();
+                      });
+                      return const SizedBox(height: 32);
+                    }
+                    return _NovelListTile(novel: result.items[index]);
+                  },
                 );
               },
             ),
@@ -199,12 +276,14 @@ class _FilterChipDropdown extends StatelessWidget {
     return PopupMenuButton<String>(
       onSelected: onSelected,
       itemBuilder: (_) => items,
-      child: FilterChip(
-        label: Text(label),
-        selected: selected,
-        onSelected: (_) {},
-        deleteIcon: selected && onClear != null ? const Icon(Icons.close, size: 14) : null,
-        onDeleted: selected ? onClear : null,
+      child: IgnorePointer(
+        child: FilterChip(
+          label: Text(label),
+          selected: selected,
+          onSelected: (_) {},
+          deleteIcon: selected && onClear != null ? const Icon(Icons.close, size: 14) : null,
+          onDeleted: selected ? onClear : null,
+        ),
       ),
     );
   }

pubspec.lock

@@ -1,6 +1,14 @@
 # Generated by pub
 # See https://dart.dev/tools/pub/glossary#lockfile
 packages:
+  archive:
+    dependency: transitive
+    description:
+      name: archive
+      sha256: a96e8b390886ee8abb49b7bd3ac8df6f451c621619f52a26e815fdcf568959ff
+      url: "https://pub.dev"
+    source: hosted
+    version: "4.0.9"
   args:
     dependency: transitive
     description:
@@ -57,6 +65,22 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.4.1"
+  checked_yaml:
+    dependency: transitive
+    description:
+      name: checked_yaml
+      sha256: "959525d3162f249993882720d52b7e0c833978df229be20702b33d48d91de70f"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.0.4"
+  cli_util:
+    dependency: transitive
+    description:
+      name: cli_util
+      sha256: ff6785f7e9e3c38ac98b2fb035701789de90154024a75b6cb926445e83197d1c
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.4.2"
   clock:
     dependency: transitive
     description:
@@ -190,6 +214,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "3.4.1"
+  flutter_launcher_icons:
+    dependency: "direct dev"
+    description:
+      name: flutter_launcher_icons
+      sha256: "10f13781741a2e3972126fae08393d3c4e01fa4cd7473326b94b72cf594195e7"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.14.4"
   flutter_lints:
     dependency: "direct dev"
     description:
@@ -360,6 +392,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "4.1.2"
+  image:
+    dependency: transitive
+    description:
+      name: image
+      sha256: f9881ff4998044947ec38d098bc7c8316ae1186fa786eddffdb867b9bc94dfce
+      url: "https://pub.dev"
+    source: hosted
+    version: "4.8.0"
   intl:
     dependency: "direct main"
     description:
@@ -376,6 +416,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "0.6.7"
+  json_annotation:
+    dependency: transitive
+    description:
+      name: json_annotation
+      sha256: cb09e7dac6210041fad964ed7fbee004f14258b4eca4040f72d1234062ace4c8
+      url: "https://pub.dev"
+    source: hosted
+    version: "4.11.0"
   leak_tracker:
     dependency: transitive
     description:
@@ -560,6 +608,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "2.1.8"
+  posix:
+    dependency: transitive
+    description:
+      name: posix
+      sha256: "185ef7606574f789b40f289c233efa52e96dead518aed988e040a10737febb07"
+      url: "https://pub.dev"
+    source: hosted
+    version: "6.5.0"
   pub_semver:
     dependency: transitive
     description:

pubspec.yaml

@@ -56,6 +56,16 @@ dev_dependencies:
   # package. See that file for information about deactivating specific lint
   # rules and activating additional ones.
   flutter_lints: ^6.0.0
+  flutter_launcher_icons: ^0.14.3
+
+# For information on the generic Dart part of this file, see the
+flutter_launcher_icons:
+  android: true
+  ios: true
+  image_path: "assets/app_icon.png"
+  min_sdk_android: 21
+  web:
+    generate: false
 
 # For information on the generic Dart part of this file, see the
 # following page: https://dart.dev/tools/pub/pubspec