feat: NO_REPLY-Filter + Audio-Ducking + TTS-Cleanup

1) NO_REPLY Token wird in Bridge und Diagnostic erkannt und still
   verworfen. Toleranz fuer Variationen (Whitespace, Punkt, Quotes).
   Kein Chat-Eintrag, kein TTS.

2) AudioFocusModule (Kotlin) mit requestDuck / requestExclusive /
   release. AudioService ruft:
   - requestExclusive() bei Aufnahme-Start → andere Apps pausieren
   - requestDuck() bei TTS-Playback-Start → andere Apps leiser
   - release() bei Stop/Queue-Ende
   MainApplication registriert AudioFocusPackage.

3) clean_text_for_tts() in Bridge — zentrale Aufbereitung:
   - <voice>...</voice> Tag wird bevorzugt (falls ARIA es schreibt)
   - Code-Bloecke (``` und `) komplett raus
   - Markdown (Fett/Kursiv/Links/Headings/Listen) geschleift
   - Einheiten ausgeschrieben: 22GB → 22 Gigabyte, 85% → 85 Prozent
   - Abkuerzungen buchstabiert: CPU → C P U, API → A P I
   - URLs durch "ein Link" ersetzt
   Genutzt in VoiceEngine.synthesize und im XTTS-Request — Chat-Text
   an die App bleibt unveraendert (original Markdown), nur TTS kriegt
   die aufbereitete Version.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

android/android/app/src/main/java/com/ariacockpit/AudioFocusModule.kt

@@ -0,0 +1,93 @@
+package com.ariacockpit
+
+import android.content.Context
+import android.media.AudioAttributes
+import android.media.AudioFocusRequest
+import android.media.AudioManager
+import android.os.Build
+import com.facebook.react.bridge.Promise
+import com.facebook.react.bridge.ReactApplicationContext
+import com.facebook.react.bridge.ReactContextBaseJavaModule
+import com.facebook.react.bridge.ReactMethod
+
+/**
+ * Steuert Audio-Focus fuer Ducking/Muten anderer Apps.
+ *
+ * - requestDuck()      → andere Apps werden leiser (ARIA spricht TTS)
+ * - requestExclusive() → andere Apps werden pausiert (Mikrofon-Aufnahme)
+ * - release()          → Focus abgeben, andere Apps duerfen wieder
+ */
+class AudioFocusModule(reactContext: ReactApplicationContext) : ReactContextBaseJavaModule(reactContext) {
+    override fun getName() = "AudioFocus"
+
+    private var currentRequest: AudioFocusRequest? = null
+
+    private fun audioManager(): AudioManager? =
+        reactApplicationContext.getSystemService(Context.AUDIO_SERVICE) as? AudioManager
+
+    private fun requestFocus(durationHint: Int, usage: Int, promise: Promise) {
+        val am = audioManager()
+        if (am == null) {
+            promise.reject("NO_AUDIO_MANAGER", "AudioManager nicht verfuegbar")
+            return
+        }
+
+        release()
+
+        val result: Int = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+            val attrs = AudioAttributes.Builder()
+                .setUsage(usage)
+                .setContentType(AudioAttributes.CONTENT_TYPE_SPEECH)
+                .build()
+            val req = AudioFocusRequest.Builder(durationHint)
+                .setAudioAttributes(attrs)
+                .setOnAudioFocusChangeListener { /* kein Callback noetig */ }
+                .build()
+            currentRequest = req
+            am.requestAudioFocus(req)
+        } else {
+            @Suppress("DEPRECATION")
+            am.requestAudioFocus(null, AudioManager.STREAM_MUSIC, durationHint)
+        }
+
+        promise.resolve(result == AudioManager.AUDIOFOCUS_REQUEST_GRANTED)
+    }
+
+    /** Andere Apps werden leiser (TTS spricht). */
+    @ReactMethod
+    fun requestDuck(promise: Promise) {
+        requestFocus(
+            AudioManager.AUDIOFOCUS_GAIN_TRANSIENT_MAY_DUCK,
+            AudioAttributes.USAGE_ASSISTANT,
+            promise,
+        )
+    }
+
+    /** Andere Apps werden pausiert (Mikrofon-Aufnahme / Gespraech). */
+    @ReactMethod
+    fun requestExclusive(promise: Promise) {
+        requestFocus(
+            AudioManager.AUDIOFOCUS_GAIN_TRANSIENT_EXCLUSIVE,
+            AudioAttributes.USAGE_VOICE_COMMUNICATION,
+            promise,
+        )
+    }
+
+    /** Focus abgeben — andere Apps duerfen wieder volle Lautstaerke. */
+    @ReactMethod
+    fun release(promise: Promise) {
+        release()
+        promise.resolve(true)
+    }
+
+    private fun release() {
+        val am = audioManager() ?: return
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+            currentRequest?.let { am.abandonAudioFocusRequest(it) }
+        } else {
+            @Suppress("DEPRECATION")
+            am.abandonAudioFocus(null)
+        }
+        currentRequest = null
+    }
+}

android/android/app/src/main/java/com/ariacockpit/AudioFocusPackage.kt

@@ -0,0 +1,16 @@
+package com.ariacockpit
+
+import com.facebook.react.ReactPackage
+import com.facebook.react.bridge.NativeModule
+import com.facebook.react.bridge.ReactApplicationContext
+import com.facebook.react.uimanager.ViewManager
+
+class AudioFocusPackage : ReactPackage {
+    override fun createNativeModules(reactContext: ReactApplicationContext): List<NativeModule> {
+        return listOf(AudioFocusModule(reactContext))
+    }
+
+    override fun createViewManagers(reactContext: ReactApplicationContext): List<ViewManager<*, *>> {
+        return emptyList()
+    }
+}

android/android/app/src/main/java/com/ariacockpit/MainApplication.kt

@@ -19,6 +19,7 @@ class MainApplication : Application(), ReactApplication {
         override fun getPackages(): List<ReactPackage> =
             PackageList(this).packages.apply {
               add(ApkInstallerPackage())
+              add(AudioFocusPackage())
             }
 
         override fun getJSMainModuleName(): String = "index"

android/src/services/audio.ts

@@ -6,7 +6,7 @@
  * Nutzt react-native-audio-recorder-player fuer Aufnahme.
  */
 
-import { Platform, PermissionsAndroid } from 'react-native';
+import { Platform, PermissionsAndroid, NativeModules } from 'react-native';
 import Sound from 'react-native-sound';
 import RNFS from 'react-native-fs';
 import AudioRecorderPlayer, {
@@ -16,6 +16,15 @@ import AudioRecorderPlayer, {
   OutputFormatAndroidType,
 } from 'react-native-audio-recorder-player';
 
+// Native Module fuer Audio-Focus (Ducking/Muten anderer Apps)
+const { AudioFocus } = NativeModules as {
+  AudioFocus?: {
+    requestDuck: () => Promise<boolean>;
+    requestExclusive: () => Promise<boolean>;
+    release: () => Promise<boolean>;
+  };
+};
+
 // --- Typen ---
 
 export interface RecordingResult {
@@ -172,6 +181,9 @@ class AudioService {
       this.speechStartTime = 0;
       this.setState('recording');
 
+      // Andere Apps waehrend der Aufnahme pausieren (Musik, Videos etc.)
+      AudioFocus?.requestExclusive().catch(() => {});
+
       // VAD aktivieren
       this.vadEnabled = autoStop;
       if (autoStop) {
@@ -220,6 +232,9 @@ class AudioService {
       await this.recorder.stopRecorder();
       this.recorder.removeRecordBackListener();
 
+      // Audio-Focus freigeben — andere Apps duerfen wieder
+      AudioFocus?.release().catch(() => {});
+
       const durationMs = Date.now() - this.recordingStartTime;
       const hadSpeech = this.speechDetected;
 
@@ -278,11 +293,17 @@ class AudioService {
   private async _playNext(): Promise<void> {
     if (this.audioQueue.length === 0) {
       this.isPlaying = false;
+      // Audio-Focus abgeben → andere Apps volle Lautstaerke
+      AudioFocus?.release().catch(() => {});
       // Alle Audio-Teile abgespielt → Listener benachrichtigen
       this.playbackFinishedListeners.forEach(cb => cb());
       return;
     }
 
+    // Beim ersten Playback-Start: andere Apps ducken
+    if (!this.isPlaying) {
+      AudioFocus?.requestDuck().catch(() => {});
+    }
     this.isPlaying = true;
 
     // Preloaded Sound verwenden wenn verfuegbar, sonst neu laden
@@ -358,6 +379,8 @@ class AudioService {
       if (this.preloadedPath) RNFS.unlink(this.preloadedPath).catch(() => {});
       this.preloadedPath = '';
     }
+    // Audio-Focus freigeben
+    AudioFocus?.release().catch(() => {});
   }
 
   // --- Status & Callbacks ---