feat: stabilize voice activity and audio routing

apps/chanora_flutter/lib/design/platform_capabilities.dart

@@ -51,146 +51,147 @@ List<PlatformCapability> currentPlatformCapabilities() {
 }
 
 List<PlatformCapability> _androidCapabilities() => [
-      const PlatformCapability(
-        feature: 'Voice capture',
-        description: 'Oboe AAudio backend; Bluetooth SCO supported.',
-        tier: CapabilityTier.supported,
-      ),
-      const PlatformCapability(
-        feature: 'Voice processing',
-        description: 'WebRTC AEC3/NS/AGC2, VAD via Silero ONNX.',
-        tier: CapabilityTier.supported,
-      ),
-      const PlatformCapability(
-        feature: 'Foreground service',
-        description: 'Persistent notification during active connection.',
-        tier: CapabilityTier.supported,
-      ),
-      const PlatformCapability(
-        feature: 'Global PTT hotkey',
-        description: 'Not available on Android.',
-        tier: CapabilityTier.unavailable,
-      ),
-      const PlatformCapability(
-        feature: 'Audio device selection',
-        description: 'System-managed; wired/BT/SCO automatic routing.',
-        tier: CapabilityTier.degraded,
-      ),
-      const PlatformCapability(
-        feature: 'Push-to-talk button',
-        description: 'Media button / volume-key binding supported.',
-        tier: CapabilityTier.supported,
-      ),
-    ];
+  const PlatformCapability(
+    feature: 'Voice capture',
+    description: 'Oboe AAudio backend; Bluetooth SCO supported.',
+    tier: CapabilityTier.supported,
+  ),
+  const PlatformCapability(
+    feature: 'Voice processing',
+    description: 'WebRTC AEC3/NS/AGC2, VAD via Silero ONNX.',
+    tier: CapabilityTier.supported,
+  ),
+  const PlatformCapability(
+    feature: 'Foreground service',
+    description: 'Persistent notification during active connection.',
+    tier: CapabilityTier.supported,
+  ),
+  const PlatformCapability(
+    feature: 'Global PTT hotkey',
+    description: 'Not available on Android.',
+    tier: CapabilityTier.unavailable,
+  ),
+  const PlatformCapability(
+    feature: 'Audio device selection',
+    description: 'System-managed; wired/BT/SCO automatic routing.',
+    tier: CapabilityTier.degraded,
+  ),
+  const PlatformCapability(
+    feature: 'Push-to-talk button',
+    description: 'Media button / volume-key binding supported.',
+    tier: CapabilityTier.supported,
+  ),
+];
 
 List<PlatformCapability> _iosCapabilities() => [
-      const PlatformCapability(
-        feature: 'Voice capture',
-        description: 'VoiceProcessingIO AudioUnit (default); Sonora raw mode optional.',
-        tier: CapabilityTier.supported,
-      ),
-      const PlatformCapability(
-        feature: 'Voice processing',
-        description: 'Platform AEC/NS/AGC via VPIO; optional Rust AEC3/NS/AGC2 via Sonora.',
-        tier: CapabilityTier.supported,
-      ),
-      const PlatformCapability(
-        feature: 'Audio route switching',
-        description: 'Handles speaker/earpiece/Bluetooth route changes and interruptions.',
-        tier: CapabilityTier.supported,
-      ),
-      const PlatformCapability(
-        feature: 'Global PTT hotkey',
-        description: 'Not available on iOS.',
-        tier: CapabilityTier.unavailable,
-      ),
-      const PlatformCapability(
-        feature: 'Background audio',
-        description: 'Supported via AVAudioSession background mode.',
-        tier: CapabilityTier.supported,
-      ),
-    ];
+  const PlatformCapability(
+    feature: 'Voice capture',
+    description: 'VoiceProcessingIO AudioUnit (default).',
+    tier: CapabilityTier.supported,
+  ),
+  const PlatformCapability(
+    feature: 'Voice processing',
+    description: 'Platform AEC/NS/AGC via VPIO.',
+    tier: CapabilityTier.supported,
+  ),
+  const PlatformCapability(
+    feature: 'Audio route switching',
+    description:
+        'Handles speaker/earpiece/Bluetooth route changes and interruptions.',
+    tier: CapabilityTier.supported,
+  ),
+  const PlatformCapability(
+    feature: 'Global PTT hotkey',
+    description: 'Not available on iOS.',
+    tier: CapabilityTier.unavailable,
+  ),
+  const PlatformCapability(
+    feature: 'Background audio',
+    description: 'Supported via AVAudioSession background mode.',
+    tier: CapabilityTier.supported,
+  ),
+];
 
 List<PlatformCapability> _macosCapabilities() => [
-      const PlatformCapability(
-        feature: 'Voice capture',
-        description: 'cpal device enumeration; VoiceProcessingIO optional.',
-        tier: CapabilityTier.supported,
-      ),
-      const PlatformCapability(
-        feature: 'Voice processing',
-        description: 'WebRTC AEC3/NS/AGC2; VPIO available on macOS.',
-        tier: CapabilityTier.supported,
-      ),
-      const PlatformCapability(
-        feature: 'Global PTT hotkey',
-        description: 'Supported via platform-global key-binding API.',
-        tier: CapabilityTier.supported,
-      ),
-      const PlatformCapability(
-        feature: 'Secure storage',
-        description: 'macOS Keychain.',
-        tier: CapabilityTier.supported,
-      ),
-      const PlatformCapability(
-        feature: 'Audio device selection',
-        description: 'System audio output route picker.',
-        tier: CapabilityTier.supported,
-      ),
-    ];
+  const PlatformCapability(
+    feature: 'Voice capture',
+    description: 'cpal device enumeration; VoiceProcessingIO optional.',
+    tier: CapabilityTier.supported,
+  ),
+  const PlatformCapability(
+    feature: 'Voice processing',
+    description: 'WebRTC AEC3/NS/AGC2; VPIO available on macOS.',
+    tier: CapabilityTier.supported,
+  ),
+  const PlatformCapability(
+    feature: 'Global PTT hotkey',
+    description: 'Supported via platform-global key-binding API.',
+    tier: CapabilityTier.supported,
+  ),
+  const PlatformCapability(
+    feature: 'Secure storage',
+    description: 'macOS Keychain.',
+    tier: CapabilityTier.supported,
+  ),
+  const PlatformCapability(
+    feature: 'Audio device selection',
+    description: 'System audio output route picker.',
+    tier: CapabilityTier.supported,
+  ),
+];
 
 List<PlatformCapability> _windowsCapabilities() => [
-      const PlatformCapability(
-        feature: 'Voice capture',
-        description: 'WASAPI via cpal.',
-        tier: CapabilityTier.supported,
-      ),
-      const PlatformCapability(
-        feature: 'Voice processing',
-        description: 'WebRTC AEC3/NS/AGC2.',
-        tier: CapabilityTier.supported,
-      ),
-      const PlatformCapability(
-        feature: 'Global PTT hotkey',
-        description: 'Supported via platform-global hotkey binding.',
-        tier: CapabilityTier.supported,
-      ),
-      const PlatformCapability(
-        feature: 'Secure storage',
-        description: 'Windows Credential Manager / DPAPI.',
-        tier: CapabilityTier.supported,
-      ),
-      const PlatformCapability(
-        feature: 'Installer',
-        description: 'MSIX packaging not yet available in beta.',
-        tier: CapabilityTier.unavailable,
-      ),
-    ];
+  const PlatformCapability(
+    feature: 'Voice capture',
+    description: 'WASAPI via cpal.',
+    tier: CapabilityTier.supported,
+  ),
+  const PlatformCapability(
+    feature: 'Voice processing',
+    description: 'WebRTC AEC3/NS/AGC2 with Silero VAD.',
+    tier: CapabilityTier.supported,
+  ),
+  const PlatformCapability(
+    feature: 'Global PTT hotkey',
+    description: 'Supported via platform-global hotkey binding.',
+    tier: CapabilityTier.supported,
+  ),
+  const PlatformCapability(
+    feature: 'Secure storage',
+    description: 'Windows Credential Manager / DPAPI.',
+    tier: CapabilityTier.supported,
+  ),
+  const PlatformCapability(
+    feature: 'Installer',
+    description: 'MSIX packaging not yet available in beta.',
+    tier: CapabilityTier.unavailable,
+  ),
+];
 
 List<PlatformCapability> _linuxCapabilities() => [
-      const PlatformCapability(
-        feature: 'Voice capture',
-        description: 'PulseAudio/ALSA via cpal.',
-        tier: CapabilityTier.supported,
-      ),
-      const PlatformCapability(
-        feature: 'Voice processing',
-        description: 'WebRTC AEC3/NS/AGC2; no platform VPIO.',
-        tier: CapabilityTier.supported,
-      ),
-      const PlatformCapability(
-        feature: 'Global PTT hotkey',
-        description: 'Supported via X11/Wayland global key-binding. ',
-        tier: CapabilityTier.supported,
-      ),
-      const PlatformCapability(
-        feature: 'Secure storage',
-        description: 'Secret Service / libsecret.',
-        tier: CapabilityTier.supported,
-      ),
-      const PlatformCapability(
-        feature: 'Desktop environment',
-        description: 'DE-specific behaviour: screen locker may suspend audio.',
-        tier: CapabilityTier.degraded,
-      ),
-    ];
+  const PlatformCapability(
+    feature: 'Voice capture',
+    description: 'PulseAudio/ALSA via cpal.',
+    tier: CapabilityTier.supported,
+  ),
+  const PlatformCapability(
+    feature: 'Voice processing',
+    description: 'WebRTC AEC3/NS/AGC2 with Silero VAD; no platform VPIO.',
+    tier: CapabilityTier.supported,
+  ),
+  const PlatformCapability(
+    feature: 'Global PTT hotkey',
+    description: 'Supported via X11/Wayland global key-binding. ',
+    tier: CapabilityTier.supported,
+  ),
+  const PlatformCapability(
+    feature: 'Secure storage',
+    description: 'Secret Service / libsecret.',
+    tier: CapabilityTier.supported,
+  ),
+  const PlatformCapability(
+    feature: 'Desktop environment',
+    description: 'DE-specific behaviour: screen locker may suspend audio.',
+    tier: CapabilityTier.degraded,
+  ),
+];