feat(app): optionaler Quell-Badge an ARIA-Bubbles (Einstellung, pro Geraet, default aus)

Zeigt wie in Diagnostic, ob eine Antwort vom lokalen Modell / Claude / Fast-Path
kam — aber in der App als Opt-in, damit die App "Mama-tauglich" bleibt.

- ChatScreen: ChatMessage.answeredBy; aus dem chat-Payload UND der History-Sync
  eingefangen; kleiner farbiger Badge im statusRow der ARIA-Bubble, nur wenn
  showSource an. State aus AsyncStorage aria_show_source (default false, per
  2s-Reload synchron mit den Settings).
- SettingsScreen: Toggle "Antwort-Quelle anzeigen" in der Chat-Bubbles-Card,
  schreibt aria_show_source (pro Geraet — Stefan an, Mama aus).
- Bridge liefert answeredBy schon in chat_backup/History mit (kein Change noetig).

Server-Teil in 9cc1aec. APK-Rebuild noetig.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

android/src/screens/ChatScreen.tsx

@@ -73,6 +73,9 @@ interface ChatMessage {
   /** Projekt-Zuordnung — leer = Hauptchat. Wird genutzt um Bubbles zu
    *  Projekt-Bloecken zu gruppieren (auf/einklappbar). */
   projectId?: string;
+  /** Welcher Backend die Antwort erzeugt hat: 'local' | 'claude' | 'fast-path'.
+   *  Fuer den optionalen Quell-Badge (Einstellung aria_show_source, default aus). */
+  answeredBy?: string;
   /** Bridge-Message-ID zur Zuordnung von TTS-Audio */
   messageId?: string;
   /** Lokaler Pfad zur gecachten TTS-Audio-Datei (file://...) */
@@ -324,6 +327,8 @@ const ChatScreen: React.FC = () => {
   // App soll sie standardmaessig NICHT anzeigen — Stefan sieht sonst
   // jeden Hint mit. Toggle in Settings.
   const [showSystemHints, setShowSystemHints] = useState(false);
+  // Quell-Badge (local/claude/fast-path) an ARIA-Bubbles — pro Geraet, default AUS.
+  const [showSource, setShowSource] = useState(false);
   // Gerätelokale XTTS-Voice-Wahl (bevorzugt gegenueber dem globalen Default)
   const localXttsVoiceRef = useRef<string>('');
   // Geraetelokale TTS-Wiedergabegeschwindigkeit (speed-Param an F5-TTS)
@@ -546,6 +551,8 @@ const ChatScreen: React.FC = () => {
       setGpsEnabled(gps === 'true');
       const hints = await AsyncStorage.getItem('aria_show_hints');
       setShowSystemHints(hints === 'true'); // default false
+      const src = await AsyncStorage.getItem('aria_show_source');
+      setShowSource(src === 'true'); // default false (Mama sieht keine Badges)
     };
     loadSettings();
     const interval = setInterval(loadSettings, 2000);
@@ -815,6 +822,7 @@ const ChatScreen: React.FC = () => {
             attachments: attachments.length ? attachments : undefined,
             backupTs: typeof m.ts === 'number' ? m.ts : undefined,
             projectId: typeof m.project_id === 'string' ? m.project_id : '',
+            answeredBy: typeof m.answeredBy === 'string' ? m.answeredBy : '',
             ...(cmid && { clientMsgId: cmid }),
             // Server-Bubble = vom Brain verarbeitet → 'delivered' (✓✓)
             ...(role === 'user' && cmid && { deliveryStatus: 'delivered' as const }),
@@ -1151,6 +1159,7 @@ const ChatScreen: React.FC = () => {
             messageId: (message.payload.messageId as string) || undefined,
             backupTs: (message.payload.backupTs as number) || undefined,
             projectId: ((message.payload as any).projectId as string) || '',
+            answeredBy: ((message.payload as any).answeredBy as string) || '',
           };
           // ARIA hat geantwortet → alle User-Bubbles davor als 'delivered'
           // markieren (WhatsApp-Doppelhaken ✓✓). Brain hat sie verarbeitet.
@@ -2411,6 +2420,16 @@ const ChatScreen: React.FC = () => {
         ) : null}
         <View style={styles.statusRow}>
           <Text style={styles.timestamp}>{time}</Text>
+          {!isUser && showSource && item.answeredBy ? (() => {
+            const ab = item.answeredBy as string;
+            const map: { [k: string]: { t: string; c: string } } = {
+              local: { t: '⚡ lokal', c: '#34C759' },
+              claude: { t: 'Claude', c: '#0096FF' },
+              'fast-path': { t: '⚡ fast', c: '#AF7BFF' },
+            };
+            const b = map[ab] || { t: ab, c: '#8A8AA0' };
+            return <Text style={{ fontSize: 9, fontWeight: 'bold', color: b.c, marginLeft: 6 }}>{b.t}</Text>;
+          })() : null}
           {item.text.length > 0 ? (
             <TouchableOpacity
               hitSlop={{top:6,bottom:6,left:6,right:6}}

android/src/screens/SettingsScreen.tsx

@@ -175,6 +175,7 @@ const SettingsScreen: React.FC = () => {
   const [bgGpsEnabled, setBgGpsEnabled] = useState(false);
   const [backgroundMode, setBackgroundMode] = useState(true); // Default an
   const [showSystemHints, setShowSystemHints] = useState(false); // Default aus
+  const [showSource, setShowSource] = useState(false); // Quell-Badge, Default aus
   const [scannerVisible, setScannerVisible] = useState(false);
   const [logTab, setLogTab] = useState<LogTab>('live');
   const [logs, setLogs] = useState<LogEntry[]>([]);
@@ -261,6 +262,9 @@ const SettingsScreen: React.FC = () => {
       // Default ist aus — nur explicit 'true' aktiviert
       setShowSystemHints(saved === 'true');
     });
+    AsyncStorage.getItem('aria_show_source').then(saved => {
+      setShowSource(saved === 'true'); // Default aus
+    });
     // gpsTrackingService status syncen + auf Aenderungen lauschen
     setGpsTracking(gpsTrackingService.isActive());
     const offGps = gpsTrackingService.onChange(setGpsTracking);
@@ -857,6 +861,11 @@ const SettingsScreen: React.FC = () => {
     AsyncStorage.setItem('aria_show_hints', String(value)).catch(() => {});
   }, []);
 
+  const handleShowSourceToggle = useCallback((value: boolean) => {
+    setShowSource(value);
+    AsyncStorage.setItem('aria_show_source', String(value)).catch(() => {});
+  }, []);
+
   // --- XTTS Voice ---
 
   const selectVoice = useCallback((voiceName: string) => {
@@ -1580,6 +1589,22 @@ const SettingsScreen: React.FC = () => {
             thumbColor={showSystemHints ? '#FFFFFF' : '#666680'}
           />
         </View>
+        <View style={styles.toggleRow}>
+          <View style={styles.toggleInfo}>
+            <Text style={styles.toggleLabel}>Antwort-Quelle anzeigen</Text>
+            <Text style={styles.toggleHint}>
+              Kleiner Badge an ARIAs Bubbles: ob die Antwort vom schnellen
+              lokalen Modell, von Claude oder per Direkt-Befehl kam. Nur fuer
+              dich interessant (Technik) — standardmaessig aus.
+            </Text>
+          </View>
+          <Switch
+            value={showSource}
+            onValueChange={handleShowSourceToggle}
+            trackColor={{ false: '#2A2A3E', true: '#0096FF' }}
+            thumbColor={showSource ? '#FFFFFF' : '#666680'}
+          />
+        </View>
       </View>
 
       {/* === Hintergrund-Modus === */}