feat(voice): add iOS VAD runtime support

apps/chanora_flutter/pubspec.yaml

@@ -74,6 +74,9 @@ dependencies:
   # more "am I testing the right build?" question during the
   # iOS audio test cycle.
   package_info_plus: ^10.1.0
+  # Touch-only PTT feedback for mobile voice UX (P0 voice basics,
+  # DEC-003 iOS 13 floor; haptic_kit supports iOS 12+).
+  haptic_kit: ^1.0.0
 
 dev_dependencies:
   flutter_test:
@@ -105,10 +108,9 @@ flutter:
   # the material Icons class.
   uses-material-design: true
 
-  # To add assets to your application, add an assets section, like this:
-  # assets:
-  #   - images/a_dot_burr.jpeg
-  #   - images/a_dot_ham.jpeg
+  assets:
+    - assets/models/silero_vad.onnx
+    - assets/models/ten_vad.onnx
 
   # An image asset can refer to one or more resolution-specific "variants", see
   # https://flutter.dev/to/resolution-aware-images