fix: pause thought counter during idle periods (#319)

Co-authored-by: Kimi Agent <kimi@timmy.local>
Co-committed-by: Kimi Agent <kimi@timmy.local>

src/dashboard/routes/chat_api.py

@@ -79,6 +79,14 @@ async def api_chat(request: Request):
     if not last_user_msg:
         return JSONResponse(status_code=400, content={"error": "No user message found"})
 
+    # Record user activity so the thinking engine knows we're not idle
+    try:
+        from timmy.thinking import thinking_engine
+
+        thinking_engine.record_user_input()
+    except Exception:
+        pass
+
     timestamp = datetime.now().strftime("%H:%M:%S")
 
     try: