批次4死代码大扫除: 删triage三件套（H5零挂载）+ /approval/keywords端点 + scheduler.py孤儿模块 + 3个.bak文件 + get_reply_stream（~96行）

backend/app/services/ai_service.py

@@ -231,102 +231,9 @@ class AIService:
     # --------------------------------------------------------------------------
     # 流式调用：SSE 流式返回（供 WebSocket 推送给前端）
     # --------------------------------------------------------------------------
-    async def get_reply_stream(
-        self,
-        message: str,
-        conversation_id: Optional[str] = None,
-        user_id: Optional[str] = None,
-    ) -> AsyncGenerator[Dict[str, Any], None]:
-        """调用 Dify API 获取流式 AI 回复（SSE），逐块 yield 给调用方。
-
-        Yields:
-            Dict: {"delta": str, "finished": bool, "conversation_id": str, "hit": bool|None}
-            - 流式中间块：{"delta": 增量, "finished": False, "hit": None}
-            - 终态块：{"delta": "", "finished": True, "hit": 命中判断}
-
-        实现：
-            - stream=True 走 SSE，解析 data: {...} 行，逐块 yield delta
-            - 流结束后用完整内容整体判断 hit（_check_knowledge_hit）
-        容错：若 Dify 不支持流式 / 超时 / 非 SSE 格式，catch 后 fallback 到
-              get_reply 非流式，yield 一次完整内容（前端退化为"整段到达"，
-              功能不破，仅无逐字动画）。
-        """
-        payload = {
-            "model": "Chat",
-            "messages": [{"role": "user", "content": message}],
-            "stream": True,
-            "temperature": 0.1,
-        }
-        if conversation_id:
-            payload["conversation_id"] = conversation_id
-        if user_id:
-            payload["user"] = user_id
-
-        try:
-            client = await self._get_client()
-            full_parts: list = []
-            dify_conv_id = conversation_id or ""
-            async with client.stream("POST", self.api_url, json=payload) as response:
-                response.raise_for_status()
-                async for line in response.aiter_lines():
-                    if not line:
-                        continue
-                    line = line.strip()
-                    if not line.startswith("data:"):
-                        continue
-                    data = line[5:].strip()
-                    if data == "[DONE]":
-                        break
-                    try:
-                        chunk = json.loads(data)
-                    except json.JSONDecodeError:
-                        continue
-                    # OpenAI / Dify SSE 格式：choices[0].delta.content
-                    try:
-                        delta = chunk["choices"][0]["delta"].get("content", "")
-                    except (KeyError, IndexError, TypeError):
-                        delta = ""
-                    if delta:
-                        full_parts.append(delta)
-                        yield {
-                            "delta": delta,
-                            "finished": False,
-                            "conversation_id": dify_conv_id,
-                            "hit": None,
-                        }
-                    # Dify 可能在流式块里给出 conversation_id
-                    cid = chunk.get("conversation_id")
-                    if cid:
-                        dify_conv_id = cid
-
-            # 流结束：用完整内容判断命中
-            full_content = "".join(full_parts)
-            hit = self._check_knowledge_hit(full_content) if full_content else False
-            yield {
-                "delta": "",
-                "finished": True,
-                "conversation_id": dify_conv_id,
-                "hit": hit,
-            }
-        except Exception as e:
-            # 流式不可用（dify2openai 不支持 / 超时 / 非 SSE），回退非流式
-            logger.warning(f"Dify 流式失败，回退非流式: {e}")
-            try:
-                result = await self.get_reply(message, conversation_id, user_id)
-                yield {
-                    "delta": result["content"],
-                    "finished": True,
-                    "conversation_id": result["conversation_id"],
-                    "hit": result["hit"],
-                }
-            except Exception as e2:
-                logger.error(f"Dify 流式与非流式均失败: {e2}")
-                yield {
-                    "delta": "⚠️ AI 服务异常，请输入「IT」转人工或稍后重试。",
-                    "finished": True,
-                    "conversation_id": conversation_id or "",
-                    "hit": False,
-                }
+    # v4.0 批次4：get_reply_stream 已删除（~96 行）
+    # v2.0 起 AI 回复改为 blocking + JSON 结构化（get_structured_reply），
+    # 流式 SSE 路径零调用，属死代码。
 
     # --------------------------------------------------------------------------
     # 结构化调用：blocking 模式，返回解析后的 JSON {text, action, options}