Improve STT quality and add session/chat management

- Switch Android STT from on-device to cloud recognition for better accuracy
- Add lastMessageWasVoiceRef to prevent TTS for text-typed messages
- Stop voice session and clear chat when changing Deployment or Voice API
- Ensures clean state when switching between beneficiaries/models

app.json

@@ -27,7 +27,7 @@
       "bitcode": false
     },
     "android": {
-      "package": "com.wellnuo.app",
+      "package": "com.wellnuo.BluetoothScanner",
       "softwareKeyboardLayoutMode": "resize",
       "adaptiveIcon": {
         "backgroundColor": "#E6F4FE",
@@ -56,7 +56,7 @@
     },
     "plugins": [
       [
-        "@jamsch/expo-speech-recognition",
+        "expo-speech-recognition",
         {
           "microphonePermission": "WellNuo needs access to your microphone to listen to your voice commands.",
           "speechRecognitionPermission": "WellNuo uses speech recognition to convert your voice to text for Julia AI."

app/(tabs)/_layout.tsx

@@ -261,8 +261,8 @@ export default function TabLayout() {
 
       // Delay to let TTS fully release audio focus, then restart STT
       // iOS: 300ms for smooth audio fade
-      // Android: 50ms (Audio Focus releases immediately)
-      const delay = Platform.OS === 'android' ? 50 : 300;
+      // Android: 0ms - start immediately to catch first words (Audio Focus releases instantly)
+      const delay = Platform.OS === 'android' ? 0 : 300;
       console.log(`${platformPrefix} [TabLayout] ⏱️ Waiting ${delay}ms before restarting STT (audio focus release)`);
 
       const timer = setTimeout(() => {

app/(tabs)/chat.tsx

@@ -157,6 +157,9 @@ export default function ChatScreen() {
     }
   }, [voicePartial, voiceIsListening]);
 
+  // Track if current message was sent via voice (to decide whether to speak response)
+  const lastMessageWasVoiceRef = useRef(false);
+
   // Clear input when voice switches to processing (transcript was sent)
   const prevVoiceStatusRef = useRef(voiceStatus);
   useEffect(() => {
@@ -164,6 +167,8 @@ export default function ChatScreen() {
     prevVoiceStatusRef.current = voiceStatus;
     if (prev === 'listening' && voiceStatus === 'processing') {
       setInput('');
+      // Mark that this message was sent via voice
+      lastMessageWasVoiceRef.current = true;
     }
   }, [voiceStatus]);
 
@@ -187,34 +192,43 @@ export default function ChatScreen() {
     }, [])
   );
 
-  // When deployment ID changes, end call and clear chat
-  // Track previous value to detect actual changes (not just re-renders)
+  // When deployment ID changes BY USER ACTION, clear chat
+  // Track previous value to detect actual changes (not just initial load)
   const previousDeploymentIdRef = useRef<string | null | undefined>(undefined);
+  // Track if we've done initial load (to distinguish from user changing deployment)
+  const initialLoadDoneRef = useRef(false);
 
   useEffect(() => {
-    // undefined means "not yet initialized" - store current value and skip
+    // First render - just store the value, don't clear anything
     if (previousDeploymentIdRef.current === undefined) {
-      console.log('[Chat] Initializing deployment tracking:', customDeploymentId, 'name:', deploymentName);
+      console.log('[Chat] First render, storing deployment:', customDeploymentId);
       previousDeploymentIdRef.current = customDeploymentId;
-      // Update initial message with deployment name if we have one
-      if (customDeploymentId || deploymentName) {
-        setMessages([createInitialMessage(deploymentName)]);
-      }
       return;
     }
 
-    // Check if deployment actually changed
-    if (previousDeploymentIdRef.current !== customDeploymentId) {
-      console.log('[Chat] Deployment changed!', {
+    // Initial async load completed (null → actual value) - don't clear chat!
+    if (!initialLoadDoneRef.current && previousDeploymentIdRef.current === null && customDeploymentId) {
+      console.log('[Chat] Initial deployment load complete:', customDeploymentId, '- NOT clearing chat');
+      previousDeploymentIdRef.current = customDeploymentId;
+      initialLoadDoneRef.current = true;
+      return;
+    }
+
+    // Mark initial load as done
+    if (!initialLoadDoneRef.current && customDeploymentId) {
+      initialLoadDoneRef.current = true;
+    }
+
+    // Only clear chat if deployment ACTUALLY changed by user (after initial load)
+    if (initialLoadDoneRef.current && previousDeploymentIdRef.current !== customDeploymentId) {
+      console.log('[Chat] Deployment CHANGED by user!', {
         old: previousDeploymentIdRef.current,
         new: customDeploymentId,
         name: deploymentName,
       });
 
-      // Clear chat with new initial message (use name instead of ID)
+      // Clear chat with new initial message
       setMessages([createInitialMessage(deploymentName)]);
-
-      // Update ref
       previousDeploymentIdRef.current = customDeploymentId;
     }
   }, [customDeploymentId, deploymentName, createInitialMessage]);
@@ -358,6 +372,10 @@ export default function ChatScreen() {
     setInput('');
     inputRef.current = '';
 
+    // This message was sent via text input (keyboard), not voice
+    // Reset the flag so response won't be spoken
+    lastMessageWasVoiceRef.current = false;
+
     setMessages(prev => [...prev, userMessage]);
     setIsSending(true);
     Keyboard.dismiss();
@@ -414,9 +432,11 @@ export default function ChatScreen() {
         };
         setMessages(prev => [...prev, assistantMessage]);
 
-        // Only speak the response if voice session is active (FAB pressed)
-        // Don't auto-speak for text-only chat messages
-        if (voiceIsActive) {
+        // Only speak the response if:
+        // 1. Voice session is active (FAB pressed) AND
+        // 2. The user's message was sent via voice (not typed)
+        // This way, typing a message while voice is active won't trigger TTS
+        if (voiceIsActive && lastMessageWasVoiceRef.current) {
           speak(responseText);
         }
       } else {

app/(tabs)/profile.tsx

@@ -16,6 +16,7 @@ import { Ionicons } from '@expo/vector-icons';
 import { SafeAreaView } from 'react-native-safe-area-context';
 import { useAuth } from '@/contexts/AuthContext';
 import { useVoice } from '@/contexts/VoiceContext';
+import { useChat } from '@/contexts/ChatContext';
 import { api } from '@/services/api';
 import { AppColors, BorderRadius, FontSizes, Spacing } from '@/constants/theme';
 
@@ -56,7 +57,8 @@ function MenuItem({
 
 export default function ProfileScreen() {
   const { user, logout } = useAuth();
-  const { updateVoiceApiType, stopSession, isActive } = useVoice();
+  const { updateVoiceApiType, stopSession } = useVoice();
+  const { clearMessages } = useChat();
   const [deploymentId, setDeploymentId] = useState<string>('');
   const [deploymentName, setDeploymentName] = useState<string>('');
   const [showDeploymentModal, setShowDeploymentModal] = useState(false);
@@ -124,6 +126,18 @@ export default function ProfileScreen() {
       try {
         const result = await api.validateDeploymentId(trimmed);
         if (result.ok && result.data?.valid) {
+          // ALWAYS stop voice session when deployment changes
+          console.log('[Profile] Stopping voice session and clearing chat before deployment change');
+          stopSession();
+
+          // Clear chat history when deployment changes
+          clearMessages({
+            id: '1',
+            role: 'assistant',
+            content: `Hello! I'm Julia, your AI wellness companion.${result.data.name ? `\n\nI'm here to help you monitor ${result.data.name}.` : ''}\n\nType a message below to chat with me.`,
+            timestamp: new Date(),
+          });
+
           await api.setDeploymentId(trimmed);
           if (result.data.name) {
             await api.setDeploymentName(result.data.name);
@@ -142,25 +156,43 @@ export default function ProfileScreen() {
         setIsValidating(false);
       }
     } else {
+      // ALWAYS stop voice session when deployment is cleared
+      console.log('[Profile] Stopping voice session and clearing chat before clearing deployment');
+      stopSession();
+
+      // Clear chat history when deployment is cleared
+      clearMessages({
+        id: '1',
+        role: 'assistant',
+        content: "Hello! I'm Julia, your AI wellness companion.\n\nType a message below to chat with me.",
+        timestamp: new Date(),
+      });
+
       await api.clearDeploymentId();
       setDeploymentId('');
       setDeploymentName('');
       setShowDeploymentModal(false);
     }
-  }, [tempDeploymentId]);
+  }, [tempDeploymentId, stopSession, clearMessages]);
 
   const saveVoiceApiType = useCallback(async () => {
-    // Stop active voice session if any before changing API type
-    if (isActive) {
-      console.log('[Profile] Stopping active voice session before API type change');
-      stopSession();
-    }
+    // ALWAYS stop voice session when API type changes
+    console.log('[Profile] Stopping voice session and clearing chat before API type change');
+    stopSession();
+
+    // Clear chat history when Voice API changes
+    clearMessages({
+      id: '1',
+      role: 'assistant',
+      content: "Hello! I'm Julia, your AI wellness companion.\n\nType a message below to chat with me.",
+      timestamp: new Date(),
+    });
 
     await api.setVoiceApiType(tempVoiceApiType);
     setVoiceApiType(tempVoiceApiType);
     updateVoiceApiType(tempVoiceApiType);
     setShowVoiceApiModal(false);
-  }, [tempVoiceApiType, updateVoiceApiType, isActive, stopSession]);
+  }, [tempVoiceApiType, updateVoiceApiType, stopSession, clearMessages]);
 
   const openTerms = () => {
     router.push('/terms');

hooks/useSpeechRecognition.ts

@@ -30,7 +30,7 @@ let ExpoSpeechRecognitionModule: any = null;
 let useSpeechRecognitionEvent: any = () => {}; // no-op by default
 
 try {
-  const speechRecognition = require('@jamsch/expo-speech-recognition');
+  const speechRecognition = require('expo-speech-recognition');
   ExpoSpeechRecognitionModule = speechRecognition.ExpoSpeechRecognitionModule;
   useSpeechRecognitionEvent = speechRecognition.useSpeechRecognitionEvent;
 } catch (e) {
@@ -258,6 +258,10 @@ export function useSpeechRecognition(
         interimResults,
         continuous,
         addsPunctuation: Platform.OS === 'ios' ? addsPunctuation : undefined,
+        // Android: use CLOUD recognition for better quality
+        // On-device models often have worse accuracy
+        // Setting to false allows the system to use Google's cloud ASR
+        requiresOnDeviceRecognition: false,
         // Android-specific: longer silence timeout for more natural pauses
         // CRITICAL FIX: Increased from 2000ms to 4000ms to prevent premature speech cutoff
         // This allows users to pause between sentences without being cut off

package.json

@@ -16,25 +16,29 @@
   "dependencies": {
     "@dr.pogodin/react-native-fs": "^2.36.2",
     "@expo/vector-icons": "^15.0.3",
-    "@jamsch/expo-speech-recognition": "^0.2.15",
     "@notifee/react-native": "^9.1.8",
     "@react-native-async-storage/async-storage": "2.2.0",
     "@react-navigation/bottom-tabs": "^7.4.0",
     "@react-navigation/elements": "^2.6.3",
     "@react-navigation/native": "^7.1.8",
+    "@stripe/stripe-react-native": "^0.58.0",
     "expo": "~54.0.29",
     "expo-clipboard": "~8.0.8",
     "expo-constants": "~18.0.12",
+    "expo-crypto": "^15.0.8",
     "expo-device": "~8.0.10",
     "expo-file-system": "~19.0.21",
     "expo-font": "~14.0.10",
     "expo-haptics": "~15.0.8",
     "expo-image": "~3.0.11",
+    "expo-image-manipulator": "^14.0.8",
+    "expo-image-picker": "^17.0.10",
     "expo-keep-awake": "^15.0.8",
     "expo-linking": "~8.0.10",
     "expo-router": "~6.0.19",
     "expo-secure-store": "^15.0.8",
     "expo-speech": "~14.0.6",
+    "expo-speech-recognition": "^3.1.0",
     "expo-splash-screen": "~31.0.12",
     "expo-status-bar": "~3.0.9",
     "expo-symbols": "~1.0.8",