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_risk_rule_dsl_examples.py

@@ -0,0 +1,148 @@
+from __future__ import annotations
+
+from datetime import UTC, date, datetime
+from decimal import Decimal
+
+import pytest
+
+from app.models.financial_record import ExpenseClaim, ExpenseClaimItem
+from app.services.risk_rule_dsl_examples import (
+    get_risk_rule_dsl_example,
+    list_risk_rule_dsl_examples,
+)
+from app.services.risk_rule_dsl_validator import validate_risk_rule_draft
+from app.services.risk_rule_generation_interpreter import COMPOSITE_RULE_TEMPLATE_KEY
+from app.services.risk_rule_generation_ontology import FIELD_ONTOLOGY
+from app.services.risk_rule_template_executor import RiskRuleTemplateExecutor
+
+
+def test_dsl_examples_pass_validator() -> None:
+    examples = list_risk_rule_dsl_examples()
+
+    assert {example["code"] for example in examples} == {
+        "travel_city_mismatch",
+        "lodging_date_outside_range",
+        "budget_threshold",
+        "duplicate_invoice",
+        "entertainment_per_capita_over_limit",
+    }
+    for example in examples:
+        manifest = example["manifest"]
+        normalized = validate_risk_rule_draft(
+            manifest["params"],
+            fields=list(FIELD_ONTOLOGY),
+            natural_language=example["natural_language"],
+        )
+
+        assert normalized["template_key"] == COMPOSITE_RULE_TEMPLATE_KEY
+        assert normalized["dsl_validation"]["status"] == "passed"
+        assert normalized["conditions"]
+        assert not normalized.get("keywords")
+
+
+@pytest.mark.parametrize(
+    ("code", "hit_contexts", "pass_contexts"),
+    [
+        (
+            "travel_city_mismatch",
+            [{"document_info": {"route_cities": ["武汉", "上海"]}}],
+            [{"document_info": {"route_cities": ["武汉", "北京"]}}],
+        ),
+        (
+            "lodging_date_outside_range",
+            [{"document_info": {"stay_start_date": "2026-05-08", "stay_end_date": "2026-05-13"}}],
+            [{"document_info": {"stay_start_date": "2026-05-10", "stay_end_date": "2026-05-12"}}],
+        ),
+        (
+            "budget_threshold",
+            [{"budget_context": {"remaining_amount": "1000.00"}}],
+            [{"budget_context": {"remaining_amount": "2000.00"}}],
+        ),
+        (
+            "duplicate_invoice",
+            [
+                {"document_info": {"invoice_no": "INV-20260530-001"}},
+                {"document_info": {"invoice_no": "INV-20260530-001"}},
+            ],
+            [
+                {"document_info": {"invoice_no": "INV-20260530-001"}},
+                {"document_info": {"invoice_no": "INV-20260530-002"}},
+            ],
+        ),
+        (
+            "entertainment_per_capita_over_limit",
+            [],
+            [],
+        ),
+    ],
+)
+def test_dsl_examples_execute_hit_and_pass(
+    code: str,
+    hit_contexts: list[dict],
+    pass_contexts: list[dict],
+) -> None:
+    example = get_risk_rule_dsl_example(code)
+    assert example is not None
+    executor = RiskRuleTemplateExecutor()
+    claim = _claim(amount=Decimal("1200.00"))
+    if code == "entertainment_per_capita_over_limit":
+        claim.expense_type = "业务招待费"
+        claim.reason = "客户接待餐费"
+        claim.attendee_count = 2
+        claim.per_capita_amount = Decimal("600.00")
+
+    hit_result = executor.evaluate(example["manifest"], claim=claim, contexts=hit_contexts)
+    if code == "entertainment_per_capita_over_limit":
+        claim.per_capita_amount = Decimal("400.00")
+    pass_result = executor.evaluate(example["manifest"], claim=claim, contexts=pass_contexts)
+
+    assert hit_result is not None
+    assert pass_result is None
+
+
+def test_duplicate_invoice_example_reports_duplicate_evidence() -> None:
+    example = get_risk_rule_dsl_example("duplicate_invoice")
+    assert example is not None
+
+    result = RiskRuleTemplateExecutor().evaluate(
+        example["manifest"],
+        claim=_claim(),
+        contexts=[
+            {"document_info": {"invoice_no": "INV-DUP-001"}},
+            {"document_info": {"invoice_no": "INV-DUP-001"}},
+        ],
+    )
+
+    assert result is not None
+    condition = result["evidence"]["conditions"][0]
+    assert condition["operator"] == "duplicate_value"
+    assert condition["duplicates"] == ["inv-dup-001"]
+
+
+def _claim(*, amount: Decimal = Decimal("1000.00")) -> ExpenseClaim:
+    claim = ExpenseClaim(
+        claim_no="TEST-RISK-RULE-DSL",
+        employee_name="测试员工",
+        department_name="测试部门",
+        expense_type="差旅费",
+        reason="北京出差项目支持",
+        location="北京",
+        amount=amount,
+        currency="CNY",
+        invoice_count=2,
+        occurred_at=datetime(2026, 5, 10, tzinfo=UTC),
+        status="draft",
+    )
+    claim.trip_start_date = date(2026, 5, 10)
+    claim.trip_end_date = date(2026, 5, 12)
+    claim.items = [
+        ExpenseClaimItem(
+            item_date=date(2026, 5, 10),
+            item_type="travel",
+            item_reason="北京出差",
+            item_location="北京",
+            item_amount=amount,
+            invoice_id="INV-ITEM-001",
+        )
+    ]
+    return claim