Chat: User-Nachrichten [Datei:]-Tags als klickbare Chips rendern, System-Prompt mit Workspace-Pfad und Leerzeilen-Hinweis erweitern

wwwroot/css/chat.css

@@ -328,6 +328,24 @@
   opacity: 1;
 }
 
+/* File Ref Chips in User-Bubbles */
+
+.file-ref-chip {
+  display: inline-block;
+  padding: var(--badge-padding);
+  background: var(--f2-bg);
+  border: var(--border-width) solid var(--f2-border);
+  border-radius: var(--border-radius);
+  font-family: var(--mono);
+  font-size: .85em;
+  white-space: nowrap;
+}
+
+.file-ref-chip:hover {
+  border-color: var(--f3-border);
+  background: var(--f3-bg);
+}
+
 /* Attachments in History */
 
 .attachment-indicator {

wwwroot/js/history.js

@@ -112,7 +112,7 @@ async function loadLatestArchive() {
           case 'text':
             if (msg.role === 'user') {
               div.className = 'msg user archived';
-              div.textContent = (msg.content || '').trim();
+              renderUserContent(div, msg.content);
             } else {
               div.className = 'msg assistant markdown archived';
               div.innerHTML = renderMarkdown(msg.content);

wwwroot/js/ui.js

@@ -30,11 +30,46 @@ function truncate(s, max) {
 
 // ── Message Bubbles ──
 
+function renderUserContent(container, text) {
+  const raw = (text || '').trim();
+  // [Datei: path] oder [Datei: path:1-10] erkennen
+  const pattern = /\[Datei: ([^\]]+)\]/g;
+  let last = 0;
+  let match;
+  const frag = document.createDocumentFragment();
+
+  while ((match = pattern.exec(raw)) !== null) {
+    // Text vor dem Tag
+    if (match.index > last) {
+      frag.appendChild(document.createTextNode(raw.slice(last, match.index)));
+    }
+
+    const ref = match[1]; // z.B. "src/foo.cs:10-25"
+    const chip = document.createElement('span');
+    chip.className = 'file-ref-chip';
+    chip.textContent = match[0];
+    chip.title = ref;
+    chip.style.cursor = 'pointer';
+    chip.addEventListener('click', () => {
+      openFileExplorer({ sessionId: getCurrentSessionId() });
+    });
+    frag.appendChild(chip);
+    last = match.index + match[0].length;
+  }
+
+  // Resttext
+  if (last < raw.length) {
+    frag.appendChild(document.createTextNode(raw.slice(last)));
+  }
+
+  container.appendChild(frag);
+}
+
 function addUserBubble(text, streamed = false) {
   const div = document.createElement('div');
   div.className = 'msg user';
   if (streamed) div.classList.add('streamed');
-  div.textContent = (text || '').trim();
+  renderUserContent(div, text);
   chatEl().appendChild(div);
   scrollDown();
 }