feat: 报销预审会话状态管理与工作台交互增强

- 新增差旅报销会话状态管理与对话模型重构
- 增强风险观测服务与运行时聊天上下文作用域
- 优化工作台图标资源、助理意图识别与摘要工具
- 完善报销创建视图样式与差旅详情页标准调整交互
- 补充风险观测、运行时聊天与报销端点测试覆盖

server/tests/test_runtime_chat_service.py

@@ -150,6 +150,62 @@ def test_runtime_chat_disables_glm_thinking_for_direct_user_answers(monkeypatch)
         assert captured["timeout_seconds"] == 17
 
 
+def test_runtime_chat_openai_compatible_tool_call_payload(monkeypatch) -> None:
+    _clear_runtime_chat_cooldown()
+    session_factory = build_session_factory()
+    with session_factory() as db:
+        service = RuntimeChatService(db)
+        captured: dict[str, object] = {}
+
+        def fake_send_json_request(method, url, *, headers, payload, timeout_seconds):
+            captured["method"] = method
+            captured["url"] = url
+            captured["headers"] = headers
+            captured["payload"] = payload
+            captured["timeout_seconds"] = timeout_seconds
+            return 200, {
+                "choices": [
+                    {
+                        "message": {
+                            "tool_calls": [
+                                {
+                                    "id": "call_001",
+                                    "type": "function",
+                                    "function": {
+                                        "name": "submit_steward_intent_plan",
+                                        "arguments": "{\"tasks\": []}",
+                                    },
+                                }
+                            ]
+                        }
+                    }
+                ]
+            }
+
+        monkeypatch.setattr("app.services.runtime_chat._send_json_request", fake_send_json_request)
+
+        tool_call = service._request_openai_compatible_tool_call(
+            provider="OpenAI Compatible",
+            endpoint="https://api.example.com/v1",
+            model="gpt-test",
+            api_key="secret",
+            messages=[{"role": "user", "content": "hello"}],
+            tools=[{"type": "function", "function": {"name": "submit_steward_intent_plan"}}],
+            tool_choice={"type": "function", "function": {"name": "submit_steward_intent_plan"}},
+            max_tokens=128,
+            temperature=0.1,
+            timeout_seconds=19,
+        )
+
+        assert tool_call is not None
+        assert tool_call.name == "submit_steward_intent_plan"
+        assert tool_call.arguments == {"tasks": []}
+        assert captured["url"] == "https://api.example.com/v1/chat/completions"
+        assert captured["payload"]["tools"][0]["function"]["name"] == "submit_steward_intent_plan"
+        assert captured["payload"]["tool_choice"]["function"]["name"] == "submit_steward_intent_plan"
+        assert captured["headers"]["Authorization"] == "Bearer secret"
+
+
 def test_runtime_chat_supports_single_pass_fast_failover(monkeypatch) -> None:
     _clear_runtime_chat_cooldown()
     session_factory = build_session_factory()