feat(voice): add iOS VAD runtime support

apps/chanora_flutter/lib/l10n/app_en.arb

@@ -17,6 +17,11 @@
   "disconnectAction": "Disconnect",
   "refreshAction": "Refresh",
   "diagnosticsAction": "Diagnostics",
+  "diagnosticsSaveAction": "Save export",
+  "diagnosticsSaved": "Diagnostic export saved to {path}",
+  "@diagnosticsSaved": {
+    "placeholders": { "path": { "type": "String" } }
+  },
   "aboutAction": "About",
   "aboutVersion": "Version {version}",
   "@aboutVersion": {
@@ -161,5 +166,16 @@
   "networkPermissionOpenSettings": "Open System Settings",
   "microphonePermissionTitle": "Microphone Permission Required",
   "microphonePermissionBody": "Chanora needs permission to access the microphone. On macOS, go to System Settings → Privacy & Security → Microphone and enable Chanora.",
+  "microphonePermissionRequiredForVoice": "Microphone permission is required for voice transmission.",
+  "permissionGrantAction": "Grant",
+  "audioRouteSystemDefault": "System default",
+  "audioRouteEarpiece": "Earpiece",
+  "audioRouteUsbHeadset": "USB headset",
+  "audioRouteOtherDevice": "Other device",
+  "audioRouteRefreshDevices": "Refresh audio devices",
+  "audioRouteCannotSelect": "This output cannot be selected.",
+  "audioRouteChangeFailed": "Could not change audio output.",
+  "iosAudioInterrupted": "Audio interrupted by system (phone call)",
+  "iosAudioResuming": "Audio resuming",
   "permissionDenied": "Permission Denied"
 }