feat(ios,p0): iOS P0 platform, audio fixes, channel UX

apps/chanora_flutter/lib/l10n/generated/app_localizations.dart

@@ -295,6 +295,12 @@ abstract class AppL10n {
   /// **'On Linux, Global PTT requires a GNOME-Wayland desktop with the GlobalShortcuts portal. Re-bind the key and accept the desktop\'s shortcut dialog when it appears.'**
   String get pttCapabilityExplainGoGlobalLinux;
 
+  /// No description provided for @pttCapabilityExplainGoGlobalIos.
+  ///
+  /// In en, this message translates to:
+  /// **'On iOS, Apple does not expose global hotkeys to apps. Chanora uses the on-screen Push-to-Talk button and only transmits while the app is in the foreground.'**
+  String get pttCapabilityExplainGoGlobalIos;
+
   /// No description provided for @pttCapabilityExplainGoGlobalGeneric.
   ///
   /// In en, this message translates to:
@@ -379,6 +385,12 @@ abstract class AppL10n {
   /// **'Join channel'**
   String get joinChannelAction;
 
+  /// No description provided for @leaveChannelAction.
+  ///
+  /// In en, this message translates to:
+  /// **'Leave channel'**
+  String get leaveChannelAction;
+
   /// No description provided for @channelPasswordTitle.
   ///
   /// In en, this message translates to:
@@ -625,6 +637,12 @@ abstract class AppL10n {
   /// **'Unknown'**
   String get audioRouteUnknown;
 
+  /// No description provided for @channelJoinAlreadyIn.
+  ///
+  /// In en, this message translates to:
+  /// **'Already in this channel.'**
+  String get channelJoinAlreadyIn;
+
   /// No description provided for @channelJoinFailedPermission.
   ///
   /// In en, this message translates to:

apps/chanora_flutter/lib/l10n/generated/app_localizations_en.dart

@@ -123,6 +123,10 @@ class AppL10nEn extends AppL10n {
   String get pttCapabilityExplainGoGlobalLinux =>
       'On Linux, Global PTT requires a GNOME-Wayland desktop with the GlobalShortcuts portal. Re-bind the key and accept the desktop\'s shortcut dialog when it appears.';
 
+  @override
+  String get pttCapabilityExplainGoGlobalIos =>
+      'On iOS, Apple does not expose global hotkeys to apps. Chanora uses the on-screen Push-to-Talk button and only transmits while the app is in the foreground.';
+
   @override
   String get pttCapabilityExplainGoGlobalGeneric =>
       'Global PTT is not available in this environment. Focused PTT will keep working while the Chanora window has focus.';
@@ -169,6 +173,9 @@ class AppL10nEn extends AppL10n {
   @override
   String get joinChannelAction => 'Join channel';
 
+  @override
+  String get leaveChannelAction => 'Leave channel';
+
   @override
   String get channelPasswordTitle => 'Channel password';
 
@@ -305,6 +312,9 @@ class AppL10nEn extends AppL10n {
   @override
   String get audioRouteUnknown => 'Unknown';
 
+  @override
+  String get channelJoinAlreadyIn => 'Already in this channel.';
+
   @override
   String get channelJoinFailedPermission =>
       'Insufficient permission to join this channel.';

apps/chanora_flutter/lib/l10n/generated/app_localizations_zh.dart

@@ -120,6 +120,10 @@ class AppL10nZh extends AppL10n {
   String get pttCapabilityExplainGoGlobalLinux =>
       '在 Linux 上，启用全局对讲需要带 GlobalShortcuts 门户的 GNOME-Wayland 桌面。请重新绑定按键，并在桌面弹出快捷键对话框时接受。';
 
+  @override
+  String get pttCapabilityExplainGoGlobalIos =>
+      '在 iOS 上，Apple 不向应用开放全局热键。Chanora 使用屏幕上的按住说话按钮，并且仅在应用位于前台时响应。';
+
   @override
   String get pttCapabilityExplainGoGlobalGeneric =>
       '当前环境暂不支持全局对讲。聚焦对讲在 Chanora 窗口获得焦点时仍可正常使用。';
@@ -164,6 +168,9 @@ class AppL10nZh extends AppL10n {
   @override
   String get joinChannelAction => '加入频道';
 
+  @override
+  String get leaveChannelAction => '离开频道';
+
   @override
   String get channelPasswordTitle => '频道密码';
 
@@ -299,6 +306,9 @@ class AppL10nZh extends AppL10n {
   @override
   String get audioRouteUnknown => '未知';
 
+  @override
+  String get channelJoinAlreadyIn => '您已在此频道中。';
+
   @override
   String get channelJoinFailedPermission => '权限不足，无法加入此频道。';