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/scripts/e2e_platform_capability_smoke_testclient.py

@@ -0,0 +1,92 @@
+#!/usr/bin/env python3
+"""
+与 e2e_platform_capability_smoke.py 相同业务验证，但走 FastAPI TestClient（不经过 TCP 8037）。
+
+适用：本机存在多个进程占用 8037、HTTP 命中旧实例导致 /platform 路由 404 时。
+
+用法:
+  cd backend && .\\venv\\Scripts\\python.exe scripts/e2e_platform_capability_smoke_testclient.py
+"""
+from __future__ import annotations
+
+import os
+import sys
+import time
+
+from fastapi.testclient import TestClient
+
+# 确保加载 backend 目录
+def main() -> int:
+    os.environ.setdefault("PLATFORM_BASE_URL", "http://testserver")
+    from app.main import app
+
+    c = TestClient(app)
+    r = c.post(
+        "/api/v1/auth/login",
+        data={"username": os.getenv("PLATFORM_USERNAME", "admin"), "password": os.getenv("PLATFORM_PASSWORD", "123456")},
+        headers={"Content-Type": "application/x-www-form-urlencoded"},
+    )
+    if r.status_code != 200:
+        print("login:", r.status_code, r.text[:500], file=sys.stderr)
+        return 1
+    token = r.json().get("access_token")
+    h = {"Authorization": f"Bearer {token}"}
+
+    g = c.get("/api/v1/platform/scene-templates", headers=h)
+    if g.status_code != 200:
+        print("scene-templates:", g.status_code, g.text[:500], file=sys.stderr)
+        return 2
+    templates = g.json() or []
+    tid = "template_customer_service"
+    ids = [x.get("id") for x in templates if isinstance(x, dict)]
+    if tid not in ids:
+        tid = ids[0] if ids else None
+    if not tid:
+        print("无模板", file=sys.stderr)
+        return 3
+
+    name = os.getenv("SMOKE_AGENT_NAME") or f"冒烟_客服DSL_TC_{int(time.time())}"
+    cr = c.post(
+        "/api/v1/platform/agents/from-template",
+        headers=h,
+        json={
+            "template_id": tid,
+            "name": name,
+            "description": "e2e testclient",
+            "parameters": {"temperature": 0.35},
+            "budget_config": {"max_steps": 50, "max_llm_invocations": 5, "max_tool_calls": 20},
+        },
+    )
+    if cr.status_code not in (200, 201):
+        print("from-template:", cr.status_code, cr.text[:800], file=sys.stderr)
+        return 4
+    aid = cr.json().get("id")
+    print("agent:", aid, cr.json().get("name"))
+
+    body = {
+        "agent_id": aid,
+        "input_data": {
+            "query": os.getenv("SMOKE_USER_QUERY") or "你好，请用一句话说明你能帮我做什么。",
+            "scenario_dsl": {
+                "version": "1",
+                "scene": "customer_service_smoke_tc",
+                "goal": "验证 TestClient 执行",
+                "constraints": ["简短"],
+                "deliverables": ["一句回复"],
+                "acceptance": ["有内容"],
+                "payload": {"channel": "smoke_tc"},
+            },
+        },
+    }
+    er = c.post("/api/v1/executions", headers=h, json=body)
+    if er.status_code not in (200, 201):
+        print("executions:", er.status_code, er.text[:800], file=sys.stderr)
+        return 5
+    eid = er.json()["id"]
+    print("execution:", eid, "(异步任务需 Celery；此处仅校验创建成功)")
+    print("OK — TestClient 路径：模板 + DSL 创建执行记录成功。请用 Celery 跑完后查 GET /api/v1/executions/{id}")
+    return 0
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())