add control mic option to SessionOptions

lib/src/agent/session.dart

@@ -146,9 +146,21 @@ class Session extends DisposableChangeNotifier {
   static final Uuid _uuid = const Uuid();
 
   final Room room;
-  final SessionOptions _options;
   final _TokenSourceConfiguration _tokenSourceConfiguration;
 
+  SessionOptions get options => _options;
+
+  set options(SessionOptions value) {
+    if (!identical(value.room, room)) {
+      // Keep Session.room authoritative to avoid split-brain state.
+      value = value.copyWith(room: room);
+    }
+    _options = value;
+    notifyListeners();
+  }
+
+  SessionOptions _options;
+
   final Agent _agent = Agent();
   Agent get agent => _agent;
 
@@ -211,7 +223,9 @@ class Session extends DisposableChangeNotifier {
         _setConnectionState(ConnectionState.connecting);
         _agent.connecting(buffering: false);
         dispatchesAgent = await connect();
-        await room.localParticipant?.setMicrophoneEnabled(true);
+        if (_options.defaultMicrophoneEnabled) {
+          await room.localParticipant?.setMicrophoneEnabled(true);
+        }
       }
 
       if (dispatchesAgent) {

lib/src/agent/session_options.dart

@@ -30,21 +30,32 @@ class SessionOptions {
   /// to a failed state.
   final Duration agentConnectTimeout;
 
+  /// Whether to enable the microphone by default when the session starts.
+  ///
+  /// If set to `true`, the microphone will be enabled automatically after connecting
+  /// to the room. If set to `false`, the microphone will remain disabled until
+  /// explicitly enabled.
+  /// Defaults to `true`.
+  final bool defaultMicrophoneEnabled;
+
   SessionOptions({
     Room? room,
-    this.preConnectAudio = true,
+    this.preConnectAudio = false,
     this.agentConnectTimeout = const Duration(seconds: 20),
+    this.defaultMicrophoneEnabled = true,
   }) : room = room ?? Room();
 
   SessionOptions copyWith({
     Room? room,
     bool? preConnectAudio,
     Duration? agentConnectTimeout,
+    bool? defaultMicrophoneEnabled,
   }) {
     return SessionOptions(
       room: room ?? this.room,
       preConnectAudio: preConnectAudio ?? this.preConnectAudio,
       agentConnectTimeout: agentConnectTimeout ?? this.agentConnectTimeout,
+      defaultMicrophoneEnabled: defaultMicrophoneEnabled ?? this.defaultMicrophoneEnabled,
     );
   }
 }

pubspec.lock

@@ -452,10 +452,10 @@ packages:
     dependency: "direct main"
     description:
       name: meta
-      sha256: "23f08335362185a5ea2ad3a4e597f1375e78bce8a040df5c600c8d3552ef2394"
+      sha256: e3641ec5d63ebf0d9b41bd43201a66e3fc79a65db5f61fc181f04cd27aab950c
       url: "https://pub.dev"
     source: hosted
-    version: "1.17.0"
+    version: "1.16.0"
   mime:
     dependency: transitive
     description:
@@ -721,10 +721,10 @@ packages:
     dependency: transitive
     description:
       name: test_api
-      sha256: ab2726c1a94d3176a45960b6234466ec367179b87dd74f1611adb1f3b5fb9d55
+      sha256: "522f00f556e73044315fa4585ec3270f1808a4b186c936e612cab0b565ff1e00"
       url: "https://pub.dev"
     source: hosted
-    version: "0.7.7"
+    version: "0.7.6"
   timing:
     dependency: transitive
     description: