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。

web/src/components/layout/TopBar.vue

@@ -1,7 +1,7 @@
 <template>
   <header class="topbar" :class="{ 'chat-mode': isChat }">
     <div class="title-group">
-      <div class="eyebrow">{{ isChat ? 'Smart Finance Q&A' : 'Smart Expense Operations' }}</div>
+      <div class="eyebrow">{{ eyebrowLabel }}</div>
       <h1>{{ currentView.title }}</h1>
       <p>{{ currentView.desc }}</p>
     </div>
@@ -40,10 +40,10 @@
             </div>
           </div>
 
-          <div class="custom-range-wrap">
-            <button
-              class="custom-range-btn"
-              type="button"
+          <div class="custom-range-wrap">
+            <button
+              class="custom-range-btn"
+              type="button"
               :class="{ active: isCustomRange }"
               :aria-expanded="calendarOpen"
               aria-haspopup="dialog"
@@ -77,10 +77,20 @@
                 <button class="apply-btn" type="button" :disabled="!canApplyCustomRange" @click="applyCustomRange">
                   应用
                 </button>
-              </footer>
-            </div>
-          </div>
-        </div>
+              </footer>
+            </div>
+          </div>
+
+          <div class="dashboard-switch-wrap">
+            <EnterpriseSelect
+              v-model="overviewDashboardValue"
+              class="dashboard-switch-select"
+              :options="overviewDashboardOptions"
+              aria-label="选择看板类型"
+              size="default"
+            />
+          </div>
+        </div>
       </template>
 
       <template v-else-if="isRequestDetail">
@@ -202,8 +212,10 @@
   </header>
 </template>
 
-<script setup>
-import { computed, ref, watch } from 'vue'
+<script setup>
+import { computed, ref, watch } from 'vue'
+
+import EnterpriseSelect from '../shared/EnterpriseSelect.vue'
 
 const props = defineProps({
   currentView: { type: Object, required: true },
@@ -247,31 +259,39 @@ const props = defineProps({
     type: Array,
     default: () => []
   },
-  customRange: {
-    type: Object,
-    default: () => ({ start: '2024-07-06', end: '2024-07-12' })
-  }
-})
-
-const emit = defineEmits([
-  'update:search',
-  'update:activeRange',
-  'update:customRange',
-  'batchApprove',
-  'openChat',
-  'newApplication'
-])
-
-const isChat = computed(() => props.activeView === 'chat')
-const isOverview = computed(() => props.activeView === 'overview')
-const isWorkbench = computed(() => props.activeView === 'workbench')
-const isRequestDetail = computed(() => ['requests', 'documents', 'audit', 'digitalEmployees'].includes(props.activeView) && props.detailMode)
+  customRange: {
+    type: Object,
+    default: () => ({ start: '2024-07-06', end: '2024-07-12' })
+  },
+  overviewDashboard: {
+    type: String,
+    default: 'finance'
+  }
+})
+
+const emit = defineEmits([
+  'update:search',
+  'update:activeRange',
+  'update:customRange',
+  'update:overviewDashboard',
+  'batchApprove',
+  'openChat',
+  'newApplication'
+])
+const isChat = computed(() => props.activeView === 'chat')
+const isOverview = computed(() => props.activeView === 'overview')
+const isWorkbench = computed(() => props.activeView === 'workbench')
+const isRequestDetail = computed(() => ['requests', 'documents', 'audit', 'digitalEmployees', 'receiptFolder'].includes(props.activeView) && props.detailMode)
 const isDocuments = computed(() => props.activeView === 'documents' && !props.detailMode)
 const isRequests = computed(() => props.activeView === 'requests')
 const isDigitalEmployees = computed(() => props.activeView === 'digitalEmployees')
 const isApproval = computed(() => props.activeView === 'approval')
-const isPolicies = computed(() => props.activeView === 'policies')
-const isEmployees = computed(() => props.activeView === 'employees')
+const isPolicies = computed(() => props.activeView === 'policies')
+const isEmployees = computed(() => props.activeView === 'employees')
+const eyebrowLabel = computed(() => (
+  String(props.currentView?.eyebrow || '').trim()
+    || (isChat.value ? 'Smart Finance Q&A' : 'Smart Expense Operations')
+))
 const displayCompanyName = computed(() => String(props.companyName || '远光软件股份有限公司').trim() || '远光软件股份有限公司')
 const topbarNotificationCount = computed(() => {
   const summary = props.documentSummary ?? {}
@@ -421,11 +441,20 @@ const employeeKpis = computed(() => {
     }
   ]
 })
-const calendarOpen = ref(false)
-const draftStart = ref(props.customRange.start)
-const draftEnd = ref(props.customRange.end)
-
-const rangeOptions = computed(() =>
+const calendarOpen = ref(false)
+const draftStart = ref(props.customRange.start)
+const draftEnd = ref(props.customRange.end)
+const overviewDashboardOptions = [
+  { label: '财务看板', value: 'finance' },
+  { label: '风险看板', value: 'risk' },
+  { label: '系统看板', value: 'system' }
+]
+const overviewDashboardValue = computed({
+  get: () => props.overviewDashboard,
+  set: (value) => emit('update:overviewDashboard', value)
+})
+
+const rangeOptions = computed(() =>
   props.ranges.map((range, index) => ({
     value: range,
     label: String(range)