fix: append /no_thinking to all Qwen prompts to disable thinking mode via prompt

agent.py

@@ -66,7 +66,7 @@ class AIBrain:
         """Sinh text với Qwen3 bằng huggingface_hub InferenceClient"""
         try:
             messages = [
-                {"role": "user", "content": prompt}
+                {"role": "user", "content": prompt + "\n/no_thinking"}
             ]
             completion = self.client.chat.completions.create(
                 model=self.model_name,

utils/wiki_tool.py

@@ -132,9 +132,8 @@ Question: {question}
     try:
         completion = ai_client.chat.completions.create(
             model="Qwen/Qwen3-8B",
-            messages=[{"role": "user", "content": prompt}],
-            max_tokens=32,
-            enable_thinking=False
+            messages=[{"role": "user", "content": prompt + "\n/no_thinking"}],
+            max_tokens=32
         )
         query = completion.choices[0].message.content.strip()
         # Nếu AI trả về rỗng, fallback