Ohr-Button Absturz gefixt (LiveAudioStream entfernt, Phase 1 , Play-Button in ARIA-Nachrichten fuer Sprachwiedergabe

- [x] Chat-Suche in der App (Lupe in Statusleiste)
- [x] Watchdog mit Container-Restart (2min Warnung → 5min doctor --fix → 8min Restart),Abbrechen-Button im Diagnostic Chat
- [x] Nachrichten Backup on-the-fly (/shared/config/chat_backup.jsonl)
- [x] Grosse Nachrichten satzweise aufteilen fuer TTS
- [x] RVS Nachrichten vom Smartphone gehen durch

diagnostic/index.html

@@ -201,8 +201,9 @@
         <button class="btn secondary" onclick="toggleChatFullscreen()" id="btn-chat-fs" style="padding:4px 10px;font-size:11px;">Vollbild</button>
       </div>
       <div class="chat-box" id="chat-box"></div>
-      <div id="thinking-indicator" style="display:none;padding:6px 10px;font-size:12px;color:#FFD60A;background:#1E1E2E;border-radius:0 0 6px 6px;margin-top:-8px;margin-bottom:8px;">
-        <span style="animation:pulse 1s infinite;">&#x1F4AD;</span> <span id="thinking-text">ARIA denkt...</span>
+      <div id="thinking-indicator" style="display:none;padding:6px 10px;font-size:12px;color:#FFD60A;background:#1E1E2E;border-radius:0 0 6px 6px;margin-top:-8px;margin-bottom:8px;display:flex;align-items:center;justify-content:space-between;">
+        <span><span style="animation:pulse 1s infinite;">&#x1F4AD;</span> <span id="thinking-text">ARIA denkt...</span></span>
+        <button class="btn secondary" onclick="cancelRequest()" style="padding:2px 10px;font-size:11px;color:#FF3B30;border-color:#FF3B30;">Abbrechen</button>
       </div>
       <div class="input-row">
         <input type="text" id="chat-input" placeholder="Nachricht an ARIA...">
@@ -1166,6 +1167,13 @@
       }, 120000);
     }
 
+    // ── Abbrechen ──────────────────────────────
+    function cancelRequest() {
+      send({ action: 'cancel_request' });
+      updateThinkingIndicator({ activity: 'idle' });
+      addChat('error', 'Anfrage abgebrochen', 'system');
+    }
+
     // ── Stimmen-Config ──────────────────────────
     function sendVoiceConfig() {
       const defaultVoice = document.getElementById('diag-default-voice').value;