feat(diagnostic): Quell-Badge an ARIA-Bubbles (local / claude / fast-path)

Zeigt pro Antwort, welcher Backend sie erzeugt hat — farbcodiert (lokal=gruen,
Claude=blau, Fast-Path=lila). Nur in Diagnostic (App bleibt Mama-tauglich).

- agent.chat() gibt jetzt (reply, answered_by) zurueck; an jedem Return-Punkt
  gesetzt (fast-path/local/claude). Beide Aufrufer (main.py, background.py)
  angepasst. main.py: ChatOut.answered_by.
- bridge: liest answered_by aus /chat, reicht es an _process_core_response,
  broadcastet es im chat-Payload UND persistiert es in chat_backup (answeredBy)
  → bleibt nach Reload.
- diagnostic: srcBadgeHtml() rendert den Badge in Live-Chat + History;
  server.js liefert answeredBy in der chat_history.

Erweiterbar: spaeter kann ein Bild-Backend (FLUX/Modellname) denselben Kanal
nutzen. Modellwechsel-fuer-Antworten (groessere Modelle bei mehr GPUs) bleibt
B0.5/Skalierungs-Thema im Plan.

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

diagnostic/index.html

@@ -1891,6 +1891,7 @@
             ttsText: p.ttsText,
             backupTs: p.backupTs,
             projectId: p.projectId || '',
+            answeredBy: p.answeredBy || '',
           });
           return;
         }
@@ -1992,7 +1993,8 @@
                 const trashBtn = m.ts
                   ? `<button class="bubble-trash" title="Diese Bubble loeschen" onclick="deleteDiagBubble(${m.ts})">🗑</button>`
                   : '';
-                const innerHtml = `${trashBtn}${linked}<div class="meta">${escapeHtml(m.meta)} — ${time}</div>`;
+                const histBadge = srcBadgeHtml(m.type, m.answeredBy || '');
+                const innerHtml = `${trashBtn}${linked}<div class="meta">${escapeHtml(m.meta)}${histBadge} — ${time}</div>`;
                 for (const b of boxes) {
                   const el = document.createElement('div');
                   el.className = `chat-msg ${m.type}`;
@@ -2323,6 +2325,18 @@
       return t.trim();
     }
 
+    // Quell-Badge (local/claude/fast-path) fuer ARIA-Bubbles — in Live + History genutzt.
+    function srcBadgeHtml(type, answeredBy) {
+      if (type !== 'received' || !answeredBy) return '';
+      const M = {
+        'local':     { t: '⚡ lokal',     c: '#34C759' },
+        'claude':    { t: 'Claude',       c: '#0096FF' },
+        'fast-path': { t: '⚡ Fast-Path', c: '#AF7BFF' },
+      };
+      const b = M[answeredBy] || { t: answeredBy, c: '#8888AA' };
+      return `<span title="Antwort erzeugt von: ${escapeHtml(answeredBy)}" style="display:inline-block;margin-left:6px;padding:1px 6px;border-radius:8px;font-size:9px;font-weight:bold;background:${b.c}22;color:${b.c};border:1px solid ${b.c}55;">${b.t}</span>`;
+    }
+
     function addChat(type, text, meta, options) {
       // [FILE: /shared/uploads/aria_xxx.ext]-Marker aus dem Antworttext entfernen —
       // die Datei kommt separat via file_from_aria-Event als eigene Bubble.
@@ -2357,7 +2371,9 @@
       const trashBtn = backupTs
         ? `<button class="bubble-trash" title="Diese Bubble loeschen" onclick="deleteDiagBubble(${backupTs})">🗑</button>`
         : '';
-      const html = `${trashBtn}${linked}${ttsBlock}${gpsBlock}<div class="meta">${escapeHtml(meta)} — ${new Date().toLocaleTimeString('de-DE')}</div>`;
+      // Quell-Badge: welcher Backend die Antwort erzeugt hat (nur ARIA-Bubbles)
+      const srcBadge = srcBadgeHtml(type, (options && options.answeredBy) || '');
+      const html = `${trashBtn}${linked}${ttsBlock}${gpsBlock}<div class="meta">${escapeHtml(meta)}${srcBadge} — ${new Date().toLocaleTimeString('de-DE')}</div>`;
 
       // Thinking-Indikator ausblenden bei neuer Nachricht
       updateThinkingIndicator({ activity: 'idle' });

diagnostic/server.js

@@ -2816,6 +2816,7 @@ async function handleLoadChatHistory(clientWs) {
       const ts = obj.ts || 0;
       const text = String(obj.text || "");
       const projectId = String(obj.project_id || "");  // Multi-Threading: Kontext-Zuordnung
+      const answeredBy = String(obj.answeredBy || "");  // Quell-Badge (local/claude/fast-path)
       if (obj.role === "user") {
         if (text) messages.push({ type: "sent", text, meta: "Gateway direkt", ts, projectId });
         continue;
@@ -2842,7 +2843,7 @@ async function handleLoadChatHistory(clientWs) {
           projectId,
         });
       }
-      if (text) messages.push({ type: "received", text, meta: "chat:final", ts, projectId });
+      if (text) messages.push({ type: "received", text, meta: "chat:final", ts, projectId, answeredBy });
     }
 
     clientWs.send(JSON.stringify({ type: "chat_history", messages }));