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/src/app/services/risk_rule_generation_semantic_plan.py

@@ -0,0 +1,32 @@
+from __future__ import annotations
+
+from copy import deepcopy
+from typing import Any
+
+from app.services.risk_rule_generation_interpreter import build_dsl_from_semantic_plan
+
+
+DSL_PAYLOAD_KEYS = ("dsl", "json_dsl", "rule_dsl", "rule")
+
+
+def unwrap_semantic_plan_payload(payload: dict[str, Any]) -> dict[str, Any]:
+    """兼容旧版扁平 JSON 与新版 semantic_plan + DSL 包装结构。"""
+
+    if not isinstance(payload, dict):
+        return {}
+    semantic_plan = payload.get("semantic_plan")
+    semantic_plan = semantic_plan if isinstance(semantic_plan, dict) else {}
+    dsl = next((payload.get(key) for key in DSL_PAYLOAD_KEYS if isinstance(payload.get(key), dict)), None)
+    if not isinstance(dsl, dict):
+        result = build_dsl_from_semantic_plan(semantic_plan) or deepcopy(payload)
+        if semantic_plan:
+            result["model_semantic_plan"] = semantic_plan
+        return result
+
+    result = deepcopy(dsl)
+    if semantic_plan:
+        result["model_semantic_plan"] = semantic_plan
+    for key in ("name", "description", "flow", "risk_scoring_evidence", "unsupported_fields"):
+        if key not in result and key in payload:
+            result[key] = deepcopy(payload[key])
+    return result