added audio workword, and recording, editied readme

android/src/screens/ChatScreen.tsx

@@ -20,6 +20,7 @@ import {
 import AsyncStorage from '@react-native-async-storage/async-storage';
 import rvs, { RVSMessage, ConnectionState } from '../services/rvs';
 import audioService from '../services/audio';
+import wakeWordService from '../services/wakeword';
 import VoiceButton from '../components/VoiceButton';
 import FileUpload, { FileData } from '../components/FileUpload';
 import CameraUpload, { PhotoData } from '../components/CameraUpload';
@@ -56,6 +57,7 @@ const ChatScreen: React.FC = () => {
   const [showFileUpload, setShowFileUpload] = useState(false);
   const [showCameraUpload, setShowCameraUpload] = useState(false);
   const [gpsEnabled, setGpsEnabled] = useState(false);
+  const [wakeWordActive, setWakeWordActive] = useState(false);
 
   const flatListRef = useRef<FlatList>(null);
   const messageIdCounter = useRef(0);
@@ -134,6 +136,62 @@ const ChatScreen: React.FC = () => {
     };
   }, []);
 
+  // Wake Word: "ARIA" Erkennung → Auto-Aufnahme starten
+  useEffect(() => {
+    const unsubWake = wakeWordService.onWakeWord(async () => {
+      console.log('[Chat] Wake Word erkannt — starte Auto-Aufnahme');
+      // TTS stoppen damit ARIA sich nicht selbst hoert
+      audioService.stopPlayback();
+      // Aufnahme mit Auto-Stop (VAD) starten
+      const started = await audioService.startRecording(true);
+      if (!started) {
+        // Mikrofon nicht verfuegbar, Wake Word wieder aktivieren
+        wakeWordService.resume();
+      }
+    });
+
+    // Auto-Stop Callback: wenn Stille erkannt → Aufnahme senden + Wake Word wieder starten
+    const unsubSilence = audioService.onSilenceDetected(async () => {
+      const result = await audioService.stopRecording();
+      if (result && result.durationMs > 500) {
+        // Sprachnachricht senden (gleiche Logik wie handleVoiceRecording)
+        const location = await getCurrentLocation();
+        const userMsg: ChatMessage = {
+          id: nextId(),
+          sender: 'user',
+          text: '[Sprachnachricht]',
+          timestamp: Date.now(),
+          attachments: [{ type: 'audio', name: 'Sprachaufnahme' }],
+        };
+        setMessages(prev => [...prev, userMsg]);
+        rvs.send('audio', {
+          base64: result.base64,
+          durationMs: result.durationMs,
+          mimeType: result.mimeType,
+          ...(location && { location }),
+        });
+      }
+      // Wake Word wieder aktivieren
+      if (wakeWordActive) wakeWordService.resume();
+    });
+
+    return () => {
+      unsubWake();
+      unsubSilence();
+    };
+  }, [wakeWordActive]);
+
+  // Wake Word Toggle Handler
+  const toggleWakeWord = useCallback(async () => {
+    if (wakeWordActive) {
+      wakeWordService.stop();
+      setWakeWordActive(false);
+    } else {
+      const started = await wakeWordService.start();
+      setWakeWordActive(started);
+    }
+  }, [wakeWordActive]);
+
   // Chat-Verlauf in AsyncStorage speichern (letzte N Nachrichten)
   useEffect(() => {
     if (messages.length === 0) return;
@@ -366,7 +424,14 @@ const ChatScreen: React.FC = () => {
           <VoiceButton
             onRecordingComplete={handleVoiceRecording}
             disabled={connectionState !== 'connected'}
+            wakeWordActive={wakeWordActive}
           />
+          <TouchableOpacity
+            style={[styles.wakeWordBtn, wakeWordActive && styles.wakeWordBtnActive]}
+            onPress={toggleWakeWord}
+          >
+            <Text style={styles.wakeWordIcon}>{wakeWordActive ? '👂' : '🔇'}</Text>
+          </TouchableOpacity>
         )}
       </View>
 
@@ -530,6 +595,21 @@ const styles = StyleSheet.create({
   sendIcon: {
     fontSize: 18,
   },
+  wakeWordBtn: {
+    width: 32,
+    height: 32,
+    borderRadius: 16,
+    backgroundColor: 'rgba(255,255,255,0.1)',
+    alignItems: 'center',
+    justifyContent: 'center',
+    marginLeft: 4,
+  },
+  wakeWordBtnActive: {
+    backgroundColor: 'rgba(52, 199, 89, 0.3)',
+  },
+  wakeWordIcon: {
+    fontSize: 16,
+  },
   modalOverlay: {
     flex: 1,
     backgroundColor: 'rgba(0,0,0,0.6)',