Fix updateVoiceApiType function and add API logging

Fixes error: "updateVoiceApiType is not a function"

Changes:
- Add voiceApiType state to VoiceContext
- Implement updateVoiceApiType callback
- Load saved voice API type from SecureStore on mount
- Use voiceApiType in sendTranscript (instead of hardcoded 'ask_wellnuo_ai')
- Add console.log showing which API type is being used
- Export voiceApiType and updateVoiceApiType in context provider

Now Voice API selector in Profile works correctly and logs show which API function (voice_ask or ask_wellnuo_ai) is being called.

contexts/VoiceContext.tsx

@@ -134,6 +134,10 @@ interface VoiceContextValue {
   stopSpeaking: () => void;
   // Interrupt TTS if speaking (call when user starts talking)
   interruptIfSpeaking: () => boolean;
+
+  // Voice API configuration
+  voiceApiType: 'voice_ask' | 'ask_wellnuo_ai';
+  updateVoiceApiType: (type: 'voice_ask' | 'ask_wellnuo_ai') => void;
 }
 
 const VoiceContext = createContext<VoiceContextValue | undefined>(undefined);
@@ -162,6 +166,19 @@ export function VoiceProvider({ children }: { children: ReactNode }) {
   // Deployment ID from settings
   const deploymentIdRef = useRef<string | null>(null);
 
+  // Voice API type (voice_ask or ask_wellnuo_ai)
+  const [voiceApiType, setVoiceApiType] = useState<'voice_ask' | 'ask_wellnuo_ai'>('ask_wellnuo_ai');
+
+  // Load voice API type on mount
+  React.useEffect(() => {
+    const loadVoiceApiType = async () => {
+      const savedType = await api.getVoiceApiType();
+      setVoiceApiType(savedType);
+      console.log('[VoiceContext] Loaded voice API type:', savedType);
+    };
+    loadVoiceApiType();
+  }, []);
+
   // Load deployment ID on mount
   React.useEffect(() => {
     const loadDeploymentId = async () => {
@@ -172,6 +189,15 @@ export function VoiceProvider({ children }: { children: ReactNode }) {
     loadDeploymentId();
   }, []);
 
+  /**
+   * Update voice API type (voice_ask or ask_wellnuo_ai)
+   */
+  const updateVoiceApiType = useCallback(async (type: 'voice_ask' | 'ask_wellnuo_ai') => {
+    console.log('[VoiceContext] Updating voice API type to:', type);
+    setVoiceApiType(type);
+    await api.setVoiceApiType(type);
+  }, []);
+
   /**
    * Get WellNuo API token (same as chat.tsx)
    */
@@ -249,9 +275,12 @@ export function VoiceProvider({ children }: { children: ReactNode }) {
         // Get deployment ID
         const deploymentId = deploymentIdRef.current || '21';
 
+        // Log which API type we're using
+        console.log('[VoiceContext] Using API type:', voiceApiType);
+
         // Build request params
         const requestParams: Record<string, string> = {
-          function: 'ask_wellnuo_ai',
+          function: voiceApiType, // Use the selected voiceApiType
           clientId: 'MA_001',
           user_name: WELLNUO_USER,
           token: token,
@@ -313,7 +342,7 @@ export function VoiceProvider({ children }: { children: ReactNode }) {
         return null;
       }
     },
-    [getWellNuoToken, addTranscriptEntry]
+    [getWellNuoToken, addTranscriptEntry, voiceApiType]
   );
 
   /**
@@ -454,6 +483,8 @@ export function VoiceProvider({ children }: { children: ReactNode }) {
         speak,
         stopSpeaking,
         interruptIfSpeaking,
+        voiceApiType,
+        updateVoiceApiType,
       }}
     >
       {children}