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/composables/useWorkbenchComposerDate.js

@@ -0,0 +1,144 @@
+import { computed, ref } from 'vue'
+
+import {
+  buildWorkbenchDateLabel,
+  canApplyWorkbenchDateSelection,
+  getTodayDateValue,
+  mergeWorkbenchDateLabelIntoDraft,
+  stripWorkbenchDateLabelFromDraft
+} from '../utils/workbenchComposerDate.js'
+
+export function useWorkbenchComposerDate({ draft, focusInput } = {}) {
+  const workbenchDatePickerOpen = ref(false)
+  const workbenchDateMode = ref('single')
+  const workbenchSingleDate = ref(getTodayDateValue())
+  const workbenchRangeStartDate = ref(getTodayDateValue())
+  const workbenchRangeEndDate = ref(getTodayDateValue())
+  const workbenchDateTagLabel = ref('')
+
+  const workbenchCanApplyDateSelection = computed(() =>
+    canApplyWorkbenchDateSelection({
+      mode: workbenchDateMode.value,
+      singleDate: workbenchSingleDate.value,
+      rangeStartDate: workbenchRangeStartDate.value,
+      rangeEndDate: workbenchRangeEndDate.value
+    })
+  )
+
+  function clearWorkbenchDateSelection() {
+    const today = getTodayDateValue()
+    workbenchDatePickerOpen.value = false
+    workbenchDateMode.value = 'single'
+    workbenchSingleDate.value = today
+    workbenchRangeStartDate.value = today
+    workbenchRangeEndDate.value = today
+    workbenchDateTagLabel.value = ''
+  }
+
+  function ensureWorkbenchDateDefaults() {
+    const today = getTodayDateValue()
+    workbenchSingleDate.value ||= today
+    workbenchRangeStartDate.value ||= workbenchSingleDate.value || today
+    workbenchRangeEndDate.value ||= workbenchRangeStartDate.value || today
+  }
+
+  function toggleWorkbenchDatePicker() {
+    if (workbenchDatePickerOpen.value) {
+      workbenchDatePickerOpen.value = false
+      return
+    }
+
+    ensureWorkbenchDateDefaults()
+    workbenchDatePickerOpen.value = true
+  }
+
+  function closeWorkbenchDatePicker() {
+    workbenchDatePickerOpen.value = false
+  }
+
+  function setWorkbenchDateMode(mode) {
+    const today = getTodayDateValue()
+    const nextMode = mode === 'range' ? 'range' : 'single'
+
+    if (nextMode === 'range') {
+      const baseDate = workbenchSingleDate.value || today
+      workbenchRangeStartDate.value ||= baseDate
+      workbenchRangeEndDate.value ||= workbenchRangeStartDate.value
+    } else {
+      workbenchSingleDate.value ||= workbenchRangeStartDate.value || today
+    }
+
+    workbenchDateMode.value = nextMode
+  }
+
+  function handleWorkbenchDatePickerOutside(event) {
+    if (!workbenchDatePickerOpen.value) {
+      return
+    }
+    if (event.target instanceof Element && event.target.closest('.workbench-date-anchor')) {
+      return
+    }
+    workbenchDatePickerOpen.value = false
+  }
+
+  function applyWorkbenchDateSelection() {
+    const label = buildWorkbenchDateLabel({
+      mode: workbenchDateMode.value,
+      singleDate: workbenchSingleDate.value,
+      rangeStartDate: workbenchRangeStartDate.value,
+      rangeEndDate: workbenchRangeEndDate.value
+    })
+    if (!label) {
+      return
+    }
+
+    workbenchDateTagLabel.value = label
+    draft.value = stripWorkbenchDateLabelFromDraft(draft.value)
+    workbenchDatePickerOpen.value = false
+    focusInput?.()
+  }
+
+  function handleWorkbenchDateInputChange(part = 'single') {
+    if (workbenchDateMode.value !== 'range' || part === 'single') {
+      applyWorkbenchDateSelection()
+      return
+    }
+
+    if (part === 'range-start') {
+      if (!workbenchRangeEndDate.value || workbenchRangeEndDate.value < workbenchRangeStartDate.value) {
+        workbenchRangeEndDate.value = workbenchRangeStartDate.value
+      }
+      return
+    }
+
+    applyWorkbenchDateSelection()
+  }
+
+  function removeWorkbenchDateTag() {
+    workbenchDateTagLabel.value = ''
+    focusInput?.()
+  }
+
+  function buildWorkbenchPromptText(rawText = draft.value) {
+    return mergeWorkbenchDateLabelIntoDraft(rawText, workbenchDateTagLabel.value)
+  }
+
+  return {
+    workbenchDatePickerOpen,
+    workbenchDateMode,
+    workbenchSingleDate,
+    workbenchRangeStartDate,
+    workbenchRangeEndDate,
+    workbenchDateTagLabel,
+    workbenchCanApplyDateSelection,
+    clearWorkbenchDateSelection,
+    toggleWorkbenchDatePicker,
+    closeWorkbenchDatePicker,
+    setWorkbenchDateMode,
+    handleWorkbenchDatePickerOutside,
+    applyWorkbenchDateSelection,
+    handleWorkbenchDateInputChange,
+    removeWorkbenchDateTag,
+    buildWorkbenchPromptText
+  }
+}