feat: Agent 批量测试、作业助手与上传预览；Windows 启动脚本与文档- 新增 run_agent_test_cases 与示例 JSON、(红头)agent测试用例文档

- 扩展 test_agent_execution（--homework、UTF-8 控制台）
- 后端：uploads 预览、file_read、工作流与对话落盘等
- 前端：AgentChatPreview 与设计器相关调整
- 忽略 redis二进制、agent_workspaces、uploads、tessdata 等本机产物

Made-with: Cursor

backend/scripts/create_enterprise_scenario_agents.py

@@ -35,6 +35,10 @@ from typing import Any, Dict, List, Optional, Tuple
 # 图构建辅助
 # ---------------------------------------------------------------------------
 
+DEFAULT_LLM_PROVIDER = os.getenv("ENTERPRISE_LLM_PROVIDER", "deepseek")
+DEFAULT_LLM_MODEL = os.getenv("ENTERPRISE_LLM_MODEL", "deepseek-chat")
+DEFAULT_LLM_TIMEOUT = max(30, int(os.getenv("ENTERPRISE_LLM_TIMEOUT", "180")))
+
 
 def _sanitize_edges(edges: List[Dict[str, Any]]) -> List[Dict[str, Any]]:
     seen: set = set()
@@ -76,7 +80,10 @@ def _llm(
         "data": {
             "label": label,
             "prompt": prompt,
+            "provider": DEFAULT_LLM_PROVIDER,
+            "model": DEFAULT_LLM_MODEL,
             "temperature": float(temperature),
+            "request_timeout": DEFAULT_LLM_TIMEOUT,
             "enable_tools": en,
             "tools": tlist if en else [],
             "selected_tools": tlist if en else [],
@@ -195,17 +202,17 @@ result["lane"] = lane
 
 def build_switch_multilane_workflow() -> Dict[str, Any]:
     nodes: List[Dict[str, Any]] = [
-        {"id": "start-1", "type": "start", "position": {"x": 40, "y": 280}, "data": {"label": "开始"}},
+        {"id": "start-1", "type": "start", "position": {"x": 60, "y": 300}, "data": {"label": "开始"}},
         {
             "id": "code-lane",
             "type": "code",
-            "position": {"x": 240, "y": 280},
+            "position": {"x": 260, "y": 300},
             "data": {"label": "解析线路", "language": "python", "code": CODE_LANE, "timeout": 15},
         },
         {
             "id": "sw-1",
             "type": "switch",
-            "position": {"x": 460, "y": 280},
+            "position": {"x": 500, "y": 300},
             "data": {
                 "label": "业务线路",
                 "field": "lane",
@@ -215,39 +222,39 @@ def build_switch_multilane_workflow() -> Dict[str, Any]:
         },
         _llm(
             "llm-cs",
-            (700, 80),
+            (760, 120),
             "客服线",
             "你是企业客服专家。用户已从多线路由进入本分支；忽略线路标记，专注解决问题。简洁、礼貌。",
             temperature=0.35,
         ),
+        _llm(
+            "llm-def",
+            (760, 260),
+            "默认线",
+            "你是通用企业助手。用户未指定【客服】/【研发】/【运维】线路；先简要澄清所属场景再回答。",
+            temperature=0.35,
+        ),
         _llm(
             "llm-dev",
-            (700, 280),
+            (760, 400),
             "研发线",
             "你是研发支持专家。用户已进入研发分支；给出可执行步骤与示例，避免空泛。",
             temperature=0.28,
         ),
         _llm(
             "llm-ops",
-            (700, 480),
+            (760, 540),
             "运维线",
             "你是运维专家。用户已进入运维分支；优先给排查顺序与注意事项，不编造监控数据。",
             temperature=0.3,
         ),
-        _llm(
-            "llm-def",
-            (700, 640),
-            "默认线",
-            "你是通用企业助手。用户未指定【客服】/【研发】/【运维】线路；先简要澄清所属场景再回答。",
-            temperature=0.35,
-        ),
         {
             "id": "merge-1",
             "type": "merge",
-            "position": {"x": 980, "y": 280},
+            "position": {"x": 1060, "y": 330},
             "data": {"label": "合并", "mode": "merge_all", "strategy": "object"},
         },
-        {"id": "end-1", "type": "end", "position": {"x": 1220, "y": 280}, "data": {"label": "结束"}},
+        {"id": "end-1", "type": "end", "position": {"x": 1300, "y": 330}, "data": {"label": "结束"}},
     ]
     edges = _sanitize_edges(
         [