feat: 新增风险图谱算法与系统仪表盘及操作反馈体系

后端新增风险图谱算法模块、风险观察与反馈服务、规则 DSL
校验器和可解释性引擎，完善系统仪表盘和财务仪表盘统计，
优化 agent 运行和编排执行链路，清理旧开发文档，前端新增
系统趋势、负载热力图等多种仪表盘图表组件，完善操作反馈
对话框和工作台日期选择器，优化报销创建和审批详情交互，
补充单元测试覆盖。

server/tests/test_runtime_chat_service.py

@@ -55,6 +55,39 @@ def test_runtime_chat_fails_over_to_backup_before_retrying_main(monkeypatch) ->
         assert calls == ["main", "backup"]
 
 
+def test_runtime_chat_complete_with_trace_records_slot_failover(monkeypatch) -> None:
+    _clear_runtime_chat_cooldown()
+    session_factory = build_session_factory()
+    with session_factory() as db:
+        service = RuntimeChatService(db)
+
+        def fake_load_chat_slot(slot: str):
+            return {
+                "slot": slot,
+                "provider": "MiniMax" if slot == "main" else "GLM",
+                "endpoint": "https://example.com/v1",
+                "model": "main-model" if slot == "main" else "backup-model",
+                "apiKey": "secret",
+            }
+
+        def fake_request_chat_completion(config, messages, *, max_tokens, temperature, timeout_seconds):
+            del messages, max_tokens, temperature, timeout_seconds
+            if config["slot"] == "main":
+                raise RuntimeError("incorrect api key")
+            return "backup answer"
+
+        monkeypatch.setattr(service, "_load_chat_slot", fake_load_chat_slot)
+        monkeypatch.setattr(service, "_request_chat_completion", fake_request_chat_completion)
+
+        result = service.complete_with_trace([{"role": "user", "content": "hello"}])
+
+        assert result.text == "backup answer"
+        assert [item.status for item in result.calls] == ["failed", "succeeded"]
+        assert result.calls[0].provider == "MiniMax"
+        assert result.calls[0].error_message == "incorrect api key"
+        assert result.calls_as_dicts()[1]["model"] == "backup-model"
+
+
 def test_runtime_chat_does_not_rehit_failed_slots_during_cooldown(monkeypatch) -> None:
     _clear_runtime_chat_cooldown()
     session_factory = build_session_factory()