Added an ability to download the trace so I can create agent traces

frontend.html

@@ -635,6 +635,24 @@
                 <path d="M12 2v2M12 20v2M4.9 4.9l1.4 1.4M17.7 17.7l1.4 1.4M2 12h2M20 12h2M4.9 19.1l1.4-1.4M17.7 6.3l1.4-1.4"/>
             </svg>
         </button>
+
+        <!-- ░░░ TEMP: download agent traces — remove this whole block when asked ░░░ -->
+        <a id="dl-traces" href="/traces" download="agent_traces.jsonl"
+           title="Download agent traces (temporary)"
+           style="margin-left:10px; display:inline-flex; align-items:center; gap:6px; height:38px; padding:0 14px;
+                  font-family:var(--sans); font-size:12.5px; font-weight:600; color:var(--text-dim);
+                  background:var(--bg-panel); border:1px solid var(--border); border-radius:10px;
+                  text-decoration:none; cursor:pointer; white-space:nowrap;">
+            <svg viewBox="0 0 24 24" width="15" height="15" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M12 3v12m0 0l-4-4m4 4l4-4M5 21h14"/></svg>
+            Traces
+        </a>
+        <script>
+          // The served app exposes /traces; the file:// preview has no server, so
+          // point at the on-disk trace file instead (only exists once app.py has run).
+          if (location.protocol === 'file:')
+              document.getElementById('dl-traces').setAttribute('href', 'agent_traces.jsonl');
+        </script>
+        <!-- ░░░ /TEMP ░░░ -->
     </header>
 
     <div class="container">