feat(flow): input feather, center puppet, smiley nav, arc buttons

- Input bar: show bouncing feather icon while typing (circle static); send
  after pause or on submit; debounced isTyping state
- Move puppet to center empty state (replacing feather); hide when there
  are messages
- Add smiley button next to mic; same as Talk (web: location, native: modal)
- Puppet actions: place four buttons in arc above puppet with icons; increase
  spacing between buttons and puppet

package.json

@@ -27,8 +27,10 @@
     "expo-crypto": "~14.0.2",
     "expo-font": "~13.0.4",
     "expo-haptics": "~14.0.0",
+    "expo-av": "~15.0.2",
     "expo-image-picker": "^17.0.10",
     "expo-linear-gradient": "~14.0.2",
+    "expo-speech": "~13.0.1",
     "expo-status-bar": "~2.0.0",
     "react": "18.3.1",
     "react-dom": "18.3.1",
@@ -39,6 +41,7 @@
     "react-native-screens": "~4.4.0",
     "react-native-svg": "^15.15.2",
     "react-native-view-shot": "^3.8.0",
+    "react-native-webview": "13.12.2",
     "react-native-web": "~0.19.13",
     "readable-stream": "^4.7.0",
     "vm-browserify": "^1.1.2"