Add runtime microphone permission request for WebRTC calls

The RECORD_AUDIO permission was declared in the manifest but never
requested at runtime, causing WebRTC to fail on Android 6+. Now
requests microphone permission on app startup before initializing
the WebView.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

mobile/lib/screens/phone_screen.dart

@@ -1,4 +1,5 @@
 import 'package:flutter/material.dart';
+import 'package:permission_handler/permission_handler.dart';
 import 'package:webview_flutter/webview_flutter.dart';
 import 'package:webview_flutter_android/webview_flutter_android.dart';
 import '../services/push_notification_service.dart';
@@ -40,6 +41,15 @@ class _PhoneScreenState extends State<PhoneScreen> with WidgetsBindingObserver {
     super.initState();
     WidgetsBinding.instance.addObserver(this);
     _pushService = PushNotificationService();
+    _requestPermissionsAndInit();
+  }
+
+  Future<void> _requestPermissionsAndInit() async {
+    // Request microphone permission before initializing WebView
+    final micStatus = await Permission.microphone.request();
+    if (micStatus.isDenied || micStatus.isPermanentlyDenied) {
+      debugPrint('TWP: Microphone permission denied: $micStatus');
+    }
     _initWebView();
     _initPush();
   }

mobile/pubspec.lock

@@ -336,6 +336,54 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "2.3.0"
+  permission_handler:
+    dependency: "direct main"
+    description:
+      name: permission_handler
+      sha256: "59adad729136f01ea9e35a48f5d1395e25cba6cea552249ddbe9cf950f5d7849"
+      url: "https://pub.dev"
+    source: hosted
+    version: "11.4.0"
+  permission_handler_android:
+    dependency: transitive
+    description:
+      name: permission_handler_android
+      sha256: d3971dcdd76182a0c198c096b5db2f0884b0d4196723d21a866fc4cdea057ebc
+      url: "https://pub.dev"
+    source: hosted
+    version: "12.1.0"
+  permission_handler_apple:
+    dependency: transitive
+    description:
+      name: permission_handler_apple
+      sha256: f000131e755c54cf4d84a5d8bd6e4149e262cc31c5a8b1d698de1ac85fa41023
+      url: "https://pub.dev"
+    source: hosted
+    version: "9.4.7"
+  permission_handler_html:
+    dependency: transitive
+    description:
+      name: permission_handler_html
+      sha256: "38f000e83355abb3392140f6bc3030660cfaef189e1f87824facb76300b4ff24"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.1.3+5"
+  permission_handler_platform_interface:
+    dependency: transitive
+    description:
+      name: permission_handler_platform_interface
+      sha256: eb99b295153abce5d683cac8c02e22faab63e50679b937fa1bf67d58bb282878
+      url: "https://pub.dev"
+    source: hosted
+    version: "4.3.0"
+  permission_handler_windows:
+    dependency: transitive
+    description:
+      name: permission_handler_windows
+      sha256: "1a790728016f79a41216d88672dbc5df30e686e811ad4e698bfc51f76ad91f1e"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.2.1"
   petitparser:
     dependency: transitive
     description:

mobile/pubspec.yaml

@@ -1,7 +1,7 @@
 name: twp_softphone
 description: TWP Softphone - WebView client for Twilio WordPress Plugin
 publish_to: 'none'
-version: 2.0.0+6
+version: 2.0.1+7
 
 environment:
   sdk: ^3.5.0
@@ -15,6 +15,7 @@ dependencies:
   flutter_local_notifications: ^17.0.0
   webview_flutter: ^4.10.0
   webview_flutter_android: ^4.3.0
+  permission_handler: ^11.3.0
 
 dev_dependencies:
   flutter_test: