diff --git a/android/src/screens/ChatScreen.tsx b/android/src/screens/ChatScreen.tsx
index dffeab2..22ff768 100644
--- a/android/src/screens/ChatScreen.tsx
+++ b/android/src/screens/ChatScreen.tsx
@@ -90,6 +90,7 @@ const ChatScreen: React.FC = () => {
   const [showCameraUpload, setShowCameraUpload] = useState(false);
   const [gpsEnabled, setGpsEnabled] = useState(false);
   const [wakeWordActive, setWakeWordActive] = useState(false);
+  const [fullscreenImage, setFullscreenImage] = useState<string | null>(null);
 
   const flatListRef = useRef<FlatList>(null);
   const messageIdCounter = useRef(0);
@@ -525,12 +526,12 @@ const ChatScreen: React.FC = () => {
         {item.attachments?.map((att, idx) => (
           <View key={idx}>
             {att.type === 'image' && att.uri ? (
+              <TouchableOpacity onPress={() => setFullscreenImage(att.uri || null)} activeOpacity={0.8}>
               <Image
                 source={{ uri: att.uri }}
                 style={styles.attachmentImage}
-                resizeMode="contain"
+                resizeMode="cover"
                 onError={() => {
-                  // Bild nicht mehr verfuegbar — Placeholder setzen
                   setMessages(prev => prev.map(m =>
                     m.id === item.id ? { ...m, attachments: m.attachments?.map((a, i) =>
                       i === idx ? { ...a, uri: undefined } : a
@@ -538,6 +539,7 @@ const ChatScreen: React.FC = () => {
                   ));
                 }}
               />
+              </TouchableOpacity>
             ) : att.type === 'image' && !att.uri ? (
               <TouchableOpacity
                 style={styles.attachmentFile}
@@ -675,6 +677,23 @@ const ChatScreen: React.FC = () => {
         )}
       </View>
 
+      {/* Bild-Vollbild Modal */}
+      <Modal visible={!!fullscreenImage} transparent animationType="fade" onRequestClose={() => setFullscreenImage(null)}>
+        <TouchableOpacity
+          style={styles.fullscreenOverlay}
+          activeOpacity={1}
+          onPress={() => setFullscreenImage(null)}
+        >
+          {fullscreenImage && (
+            <Image
+              source={{ uri: fullscreenImage }}
+              style={styles.fullscreenImage}
+              resizeMode="contain"
+            />
+          )}
+        </TouchableOpacity>
+      </Modal>
+
       {/* Datei-Upload Modal */}
       <Modal visible={showFileUpload} transparent animationType="slide">
         <View style={styles.modalOverlay}>
@@ -757,7 +776,8 @@ const styles = StyleSheet.create({
   },
   attachmentImage: {
     width: '100%',
-    height: 200,
+    minHeight: 200,
+    maxHeight: 400,
     borderRadius: 8,
     marginBottom: 6,
     backgroundColor: '#0D0D1A',
@@ -867,6 +887,16 @@ const styles = StyleSheet.create({
   wakeWordIcon: {
     fontSize: 16,
   },
+  fullscreenOverlay: {
+    flex: 1,
+    backgroundColor: 'rgba(0,0,0,0.95)',
+    justifyContent: 'center',
+    alignItems: 'center',
+  },
+  fullscreenImage: {
+    width: '100%',
+    height: '100%',
+  },
   modalOverlay: {
     flex: 1,
     backgroundColor: 'rgba(0,0,0,0.6)',
diff --git a/bridge/aria_bridge.py b/bridge/aria_bridge.py
index a9dd67a..7163876 100644
--- a/bridge/aria_bridge.py
+++ b/bridge/aria_bridge.py
@@ -184,6 +184,9 @@ class VoiceEngine:
                 tmp_path = tmp.name
 
             with wave.open(tmp_path, "wb") as wav_file:
+                wav_file.setnchannels(1)
+                wav_file.setsampwidth(2)  # 16-bit
+                wav_file.setframerate(voice.config.sample_rate)
                 voice.synthesize(text, wav_file)
 
             audio_data = Path(tmp_path).read_bytes()
diff --git a/issue.md b/issue.md
index b87cbf2..ed58fb1 100644
--- a/issue.md
+++ b/issue.md
@@ -19,3 +19,7 @@ unserer memory brain
 
 bilder im chat größer darstellen
 # ende
+
+
+die viper voices downloaden über die diagnostic
+# ende
\ No newline at end of file