fix(android): adapt fold layout and diagnostics

apps/chanora_flutter/lib/main.dart

@@ -1234,7 +1234,7 @@ class _BetaHomeState extends State<_BetaHome> {
     final headerActions = [
       if (_phase == _Phase.connected &&
           _inChannel &&
-          MediaQuery.of(context).size.width < 840.0) ...[
+          MediaQuery.of(context).size.width < 600.0) ...[
         IconButton(
           tooltip: l10n.voiceHardMuteLabel,
           icon: Icon(_hardMute ? Icons.mic_off : Icons.mic),
@@ -1268,7 +1268,7 @@ class _BetaHomeState extends State<_BetaHome> {
 
     final bodyContent = LayoutBuilder(
       builder: (ctx, bodyConstraints) {
-        const wideBreakpoint = 840.0;
+        const wideBreakpoint = 600.0;
         final isWideSnapshot =
             bodyConstraints.maxWidth >= wideBreakpoint &&
             _phase == _Phase.connected &&
@@ -1390,9 +1390,7 @@ class _BetaHomeState extends State<_BetaHome> {
                       pendingVoiceChannelId: _pendingVoiceChannelId,
                       hasJoinPending: _pendingVoiceChannelId != null,
                       canJoinVoiceChannel: _canJoinVoiceChannel,
-                      canLeaveVoiceChannel: _canLeaveVoiceChannel,
                       onJoinChannel: _onJoinChannel,
-                      onLeaveVoice: _onLeaveVoice,
                     );
                     const voiceBarWidthWide = 320.0;
                     if (constraints.maxWidth >= wideBreakpoint) {
@@ -2047,9 +2045,7 @@ class _SnapshotView extends StatelessWidget {
     required this.pendingVoiceChannelId,
     required this.hasJoinPending,
     required this.canJoinVoiceChannel,
-    required this.canLeaveVoiceChannel,
     required this.onJoinChannel,
-    required this.onLeaveVoice,
   });
 
   final rust.BridgeSnapshot snapshot;
@@ -2057,9 +2053,7 @@ class _SnapshotView extends StatelessWidget {
   final BigInt? pendingVoiceChannelId;
   final bool hasJoinPending;
   final bool canJoinVoiceChannel;
-  final bool canLeaveVoiceChannel;
   final ValueChanged<rust.BridgeChannel> onJoinChannel;
-  final VoidCallback onLeaveVoice;
 
   @override
   Widget build(BuildContext context) {
@@ -2136,27 +2130,22 @@ class _SnapshotView extends StatelessWidget {
               ),
               title: Text(ch.name),
               subtitle: Text('id=${ch.id}  parent=${ch.parent}'),
-              trailing: IconButton(
-                icon: Icon(
-                  ch.id == currentVoiceChannelId
-                      ? Icons.logout
-                      : ch.id == pendingVoiceChannelId
-                      ? Icons.hourglass_top
-                      : Icons.login,
-                ),
-                tooltip: ch.id == currentVoiceChannelId
-                    ? l10n.leaveChannelAction
-                    : ch.id == pendingVoiceChannelId
-                    ? l10n.statusConnecting
-                    : l10n.joinChannelAction,
-                onPressed: hasJoinPending
-                    ? null
-                    : ch.id == pendingVoiceChannelId
-                    ? null
-                    : ch.id == currentVoiceChannelId
-                    ? (canLeaveVoiceChannel ? onLeaveVoice : null)
-                    : () => onJoinChannel(ch),
-              ),
+              trailing: ch.id == currentVoiceChannelId
+                  ? null
+                  : IconButton(
+                      icon: Icon(
+                        ch.id == pendingVoiceChannelId
+                            ? Icons.hourglass_top
+                            : Icons.login,
+                      ),
+                      tooltip: ch.id == pendingVoiceChannelId
+                          ? l10n.statusConnecting
+                          : l10n.joinChannelAction,
+                      onPressed:
+                          hasJoinPending || ch.id == pendingVoiceChannelId
+                          ? null
+                          : () => onJoinChannel(ch),
+                    ),
               selected: ch.id == currentVoiceChannelId,
               onTap:
                   hasJoinPending ||