feat: MCP-Server für remote_execute + Inline-Choice-UI

- Python MCP-Server (stdio, JSON-RPC 2.0) für remote_execute via Claude CLI
- Interner API-Endpoint /api/internal/remote-execute mit Token-Auth
- MCP-Config wird automatisch generiert wenn Remote-Verbindung vorhanden
- Auth-Middleware: /api/internal/ von Auth ausgenommen
- Frontend: :::ASK_USER_CHOICE::: Blöcke als interaktive Buttons rendern
- Streaming: Unvollständige Choice-Blöcke werden während des Streams versteckt
- tool-ui.js: MCP-Tool-Namen generisch normalisieren (mcp__server__tool → tool)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

wwwroot/js/chat.js

@@ -402,6 +402,14 @@ async function sendMessage() {
   await _runStream((signal) => apiChat(content, getCurrentSessionId(), signal, _planModeActive));
 }
 
+// ── Direct Message (für Inline-Choice-Buttons) ──
+async function sendMessageDirect(text) {
+  if (isStreaming || !text) return;
+  addUserBubble(text, true);
+  scrollDownForce();
+  await _runStream((signal) => apiChat(text, getCurrentSessionId(), signal, _planModeActive));
+}
+
 // ── Choice Click Handler ──
 
 async function handleChoiceClick(toolCallId, choice, bubbleDiv) {
@@ -419,3 +427,23 @@ async function handleChoiceClick(toolCallId, choice, bubbleDiv) {
 
   await _runStream((signal) => apiChatChoice(getCurrentSessionId(), toolCallId, choice, signal, _planModeActive));
 }
+
+// ── Inline Choice Blocks (Fallback aus Markdown-Rendering) ──
+// Event-Delegation für .inline-choice-btn Buttons die von renderMarkdown() erzeugt wurden
+document.addEventListener('click', function(e) {
+  var btn = e.target.closest('.inline-choice-btn');
+  if (!btn) return;
+  var block = btn.closest('.inline-choice-block');
+  if (!block || block.classList.contains('choice-answered')) return;
+
+  var choice = btn.dataset.choice;
+  // Buttons deaktivieren + markieren
+  block.querySelectorAll('.inline-choice-btn').forEach(function(b) {
+    b.disabled = true;
+    b.classList.add(b === btn ? 'choice-selected' : 'choice-unselected');
+  });
+  block.classList.add('choice-answered');
+
+  // Inline-Choice als normale User-Nachricht senden (kein tool_use in DB vorhanden)
+  sendMessageDirect(choice);
+});