feat: 完善企业场景多线路由与执行稳定性

补齐平台模板与场景 DSL、预算控制、执行看板和企业场景脚本，增强 Windows 启动/迁移与前端代理和聊天会话记忆，修复执行创建阶段 500 与异步链路排障体验。

Made-with: Cursor

backend/app/api/agents.py

@@ -3,7 +3,7 @@ Agent管理API
 """
 from fastapi import APIRouter, Depends, HTTPException, status, Query
 from sqlalchemy.orm import Session
-from pydantic import BaseModel
+from pydantic import BaseModel, Field
 from typing import List, Optional, Dict, Any
 from datetime import datetime
 import logging
@@ -35,6 +35,7 @@ class AgentCreate(BaseModel):
     name: str
     description: Optional[str] = None
     workflow_config: Dict[str, Any]  # 包含nodes和edges
+    budget_config: Optional[Dict[str, Any]] = None
 
 
 class AgentUpdate(BaseModel):
@@ -43,6 +44,28 @@ class AgentUpdate(BaseModel):
     description: Optional[str] = None
     workflow_config: Optional[Dict[str, Any]] = None
     status: Optional[str] = None
+    budget_config: Optional[Dict[str, Any]] = None
+
+
+class SceneTemplateItem(BaseModel):
+    """场景模板列表项（元数据）"""
+
+    id: str
+    title: str
+    description: str
+    category: Optional[str] = None
+    default_temperature: Optional[float] = None
+    parameter_hints: List[str] = Field(default_factory=list)
+
+
+class AgentFromSceneTemplateCreate(BaseModel):
+    """从场景模板创建 Agent"""
+
+    template_id: str
+    name: str
+    description: Optional[str] = None
+    parameters: Dict[str, Any] = Field(default_factory=dict)
+    budget_config: Optional[Dict[str, Any]] = None
 
 
 class AgentResponse(BaseModel):
@@ -51,6 +74,7 @@ class AgentResponse(BaseModel):
     name: str
     description: Optional[str]
     workflow_config: Dict[str, Any]
+    budget_config: Optional[Dict[str, Any]] = None
     version: int
     status: str
     user_id: Optional[str]  # 允许为None
@@ -125,6 +149,7 @@ async def get_agents(
             "name": agent.name,
             "description": agent.description,
             "workflow_config": agent.workflow_config,
+            "budget_config": agent.budget_config,
             "version": agent.version,
             "status": agent.status,
             "user_id": agent.user_id if agent.user_id else None,
@@ -171,6 +196,7 @@ async def create_agent(
         name=agent_data.name,
         description=agent_data.description,
         workflow_config=agent_data.workflow_config,
+        budget_config=agent_data.budget_config,
         user_id=current_user.id,
         status="draft"
     )
@@ -259,6 +285,9 @@ async def update_agent(
         if agent_data.status not in valid_statuses:
             raise ValidationError(f"无效的状态: {agent_data.status}")
         agent.status = agent_data.status
+
+    if agent_data.budget_config is not None:
+        agent.budget_config = agent_data.budget_config
     
     db.commit()
     db.refresh(agent)
@@ -403,6 +432,9 @@ async def duplicate_agent(
         name=new_name,
         description=original_agent.description,
         workflow_config=new_workflow_config,
+        budget_config=copy.deepcopy(original_agent.budget_config)
+        if original_agent.budget_config is not None
+        else None,
         user_id=current_user.id,
         status="draft",  # 复制的Agent状态为草稿
         version=1  # 版本号从1开始
@@ -442,6 +474,7 @@ async def export_agent(
             "name": agent.name,
             "description": agent.description,
             "workflow_config": workflow_config,
+            "budget_config": agent.budget_config,
             "version": agent.version,
             "status": agent.status,
             "exported_at": datetime.utcnow().isoformat()
@@ -507,6 +540,7 @@ async def import_agent(
         counter += 1
     
     # 创建Agent
+    bc = agent_data.get("budget_config")
     agent = Agent(
         name=name,
         description=description,
@@ -514,6 +548,7 @@ async def import_agent(
             "nodes": nodes,
             "edges": edges
         },
+        budget_config=bc if isinstance(bc, dict) else None,
         user_id=current_user.id,
         status="draft",  # 导入的Agent默认为草稿状态
         version=1