feat：意图识别优化

app/prompt/intent.py

@@ -3,6 +3,25 @@
 from app.schemas.decision import ChoiceDecision
 
 
+def build_offer_question() -> ChoiceDecision:
+    # 上一轮助手提出了具体修改时追加的判断，只看用户对这条提议的回应，比从历史文本推断意图更可靠
+    return ChoiceDecision(
+        instructions=(
+            "In the previous turn the assistant offered to perform the edit in `pending_offer` and asked whether the user wants it. "
+            "Classify how the latest user message (`prompt`) responds to that offer. "
+            "Judge by its function in the conversation, not by a fixed word list; short replies are normal."
+        ),
+        criteria={
+            # 同意执行提议，包括简短的肯定回答
+            "accept": "Agrees to perform exactly the offered edit, e.g. 好的, 需要, 要, 可以, 行, 嗯, yes",
+            # 拒绝提议
+            "decline": "Declines the offer or says it is not needed, e.g. 不用了, 算了, no",
+            # 提出新的或修改过的请求、提问，或与提议无关
+            "other": "Asks something else, requests a different or changed edit, or does not respond to the offer",
+        },
+    )
+
+
 def build_intent_question() -> ChoiceDecision:
     return ChoiceDecision(
         # 区分意图模糊与修改细节缺失，后者交给需求理解
@@ -15,7 +34,6 @@ def build_intent_question() -> ChoiceDecision:
             "Choose qa for clear requests for a textual answer or general conversation, including information, explanation, diagnosis, advice, and assistant identity or capabilities. "
             "Requests need not be phrased as questions; being unrelated to screens does not make an intent unclear. "
             "A short conversational message that acknowledges, agrees, thanks, greets or closes the exchange (e.g. ok, Okay, um, got it, thanks, hello, goodbye) requests nothing further and is qa; decide by its function in the conversation, not by a fixed word list, and never treat it as unclear merely for being short. "
-            "Exception: if the previous assistant turn in `history` proposed a specific edit and asked for approval, an agreement to it is modify_screen, and a refusal is qa. "
             "A vague complaint or evaluation without a requested next step is unclear, not automatically qa. "
             "An explicit edit request remains modify_screen even when edit details are missing. "
             "Do not infer intent solely from selected nodes or an empty screen."