feat: integrate chat voice and diagnostics client

apps/chanora_flutter/android/app/src/main/AndroidManifest.xml

@@ -5,6 +5,18 @@
          protocol layer to dial a TeamSpeak-compatible server over UDP. -->
     <uses-permission android:name="android.permission.INTERNET" />
 
+    <!-- SRS-100: Network diagnostics. Allows the core to query active
+         network type and state for the diagnostic export. -->
+    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
+
+    <!-- SDD-115: Prevent CPU sleep during active voice sessions.
+         Keeps the audio pipeline running when the screen locks. -->
+    <uses-permission android:name="android.permission.WAKE_LOCK" />
+
+    <!-- SRS-025: Haptic feedback on PTT key press. Enables
+         VibrationEffect for transmit-mode tactile confirmation. -->
+    <uses-permission android:name="android.permission.VIBRATE" />
+
     <!-- SDD-trace: SDD-106 AndroidPermissionRequester.
          Required for the audio engine (chanora_audio) to open the
          capture stream for voice transmission. The runtime grant
@@ -56,7 +68,8 @@
     <application
         android:label="Chanora"
         android:name="app.chanora.chanora_flutter.ChanoraApplication"
-        android:icon="@mipmap/ic_launcher">
+        android:icon="@mipmap/ic_launcher"
+        android:enableOnBackInvokedCallback="true">
         <activity
             android:name=".MainActivity"
             android:exported="true"

apps/chanora_flutter/android/app/src/main/kotlin/app/chanora/chanora_flutter/AndroidPermissionRequester.kt

@@ -324,13 +324,11 @@ class AndroidPermissionRequester {
         callback: ((PermissionState) -> Unit)?,
     ) {
         callback?.invoke(state)
+        // The stateChangeListener is wired by MainActivity to invoke
+        // METHOD_PERMISSION_STATE_CHANGED on ANDROID_PERMISSIONS, which
+        // publishes BridgeEvent::PermissionState to the bridge event
+        // stream. See MainActivity.configureFlutterEngine (SDD-106 §5).
         stateChangeListener?.invoke(permission, state)
-        // TODO(Wave 2B follow-up): wire this into a Flutter MethodChannel
-        //   named MethodChannels.ANDROID_PERMISSIONS, invoking method
-        //   MethodChannels.METHOD_PERMISSION_STATE_CHANGED. The Dart
-        //   handler then publishes the corresponding
-        //   BridgeEvent::PermissionState onto the bridge event stream
-        //   (SDD-106 §5).
     }
 
     /**

apps/chanora_flutter/android/app/src/main/kotlin/app/chanora/chanora_flutter/AndroidVoiceForegroundService.kt

@@ -71,24 +71,9 @@ class AndroidVoiceForegroundService : Service() {
          */
         private const val CHANNEL_ID = "chanora.voice.session"
 
-        /**
-         * Notification channel user-visible name.
-         *
-         * TODO(localization): SDD-107 §4 requires this to be sourced
-         *   from a product string resource. Hard-coded here for the
-         *   Wave 2B implementation slice; localised strings land
-         *   alongside the broader Android string-resource pass.
-         */
-        private const val CHANNEL_NAME = "Voice session"
-
-        /**
-         * Notification channel description (product copy only, no
-         * server-supplied content per SDD-107 §5 privacy note).
-         *
-         * TODO(localization): see [CHANNEL_NAME].
-         */
-        private const val CHANNEL_DESCRIPTION =
-            "Shown while a Chanora voice session is active."
+        // SDD-107 §4: notification strings are sourced from
+        // res/values/strings.xml and accessed via the service context
+        // in instance methods below (ensureChannel, buildNotification).
 
         /**
          * Stable notification id ("CHAN") per SDD-107 §5. Must remain
@@ -298,10 +283,10 @@ class AndroidVoiceForegroundService : Service() {
         if (existing != null) return
         val channel = NotificationChannel(
             CHANNEL_ID,
-            CHANNEL_NAME,
+            getString(R.string.voice_session_channel_name),
             NotificationManager.IMPORTANCE_LOW,
         ).apply {
-            description = CHANNEL_DESCRIPTION
+            description = getString(R.string.voice_session_channel_description)
             setShowBadge(false)
         }
         nm.createNotificationChannel(channel)
@@ -329,14 +314,9 @@ class AndroidVoiceForegroundService : Service() {
             }
 
         val builder = NotificationCompat.Builder(this, CHANNEL_ID)
-            .setSmallIcon(android.R.drawable.stat_sys_speakerphone)
-            // TODO(SDD-107 §5): replace stat_sys_speakerphone with the
-            //   product icon `ic_chanora_voice` once the drawable lands
-            //   in res/drawable. Using a platform-provided icon as the
-            //   interim placeholder keeps the build green without
-            //   touching res/* (out of this slice's file set).
-            .setContentTitle("Chanora — Voice session active")
-            .setContentText("Microphone may be in use.")
+            .setSmallIcon(R.mipmap.ic_launcher)
+            .setContentTitle(getString(R.string.voice_session_notification_title))
+            .setContentText(getString(R.string.voice_session_notification_text))
             .setOngoing(true)
             .setCategory(NotificationCompat.CATEGORY_CALL)
             .setPriority(NotificationCompat.PRIORITY_LOW)

apps/chanora_flutter/android/app/src/main/res/values-zh-rCN/strings.xml

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <!-- SDD-107 §4: Chinese (Simplified) localized notification strings.
+         Product-owned copy; no server-supplied content per SDD-107 §5. -->
+    <string name="voice_session_channel_name">语音会话</string>
+    <string name="voice_session_channel_description">Chanora 语音会话处于活动状态时显示。</string>
+    <string name="voice_session_notification_title">Chanora — 语音会话进行中</string>
+    <string name="voice_session_notification_text">麦克风可能正在使用中。</string>
+</resources>

apps/chanora_flutter/android/app/src/main/res/values/strings.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <!-- SDD-107 §4: Voice session foreground service notification strings.
+         These are product-owned strings; server-supplied content is never
+         placed in notification copy per SDD-107 §5 privacy note. -->
+    <string name="voice_session_channel_name">Voice session</string>
+    <string name="voice_session_channel_description">Shown while a Chanora voice session is active.</string>
+    <string name="voice_session_notification_title">Chanora — Voice session active</string>
+    <string name="voice_session_notification_text">Microphone may be in use.</string>
+</resources>