feat: 引入 ECharts 统一图表并完善员工画像标签分页

后端优化员工行为画像服务和辅助函数，完善系统设置模型和
配置持久化，前端引入 ECharts 替换所有图表组件实现统一
渲染，新增员工画像标签分页器和数字员工工作记录组件，优
化工作台响应式布局和登录页过渡动画，完善预算中心和数字
员工页面样式细节。

web/src/views/DigitalEmployeesView.vue

@@ -75,10 +75,24 @@
       </article>
 
       <article v-else key="list" class="skill-list panel digital-employees-list">
-        <nav class="status-tabs" aria-label="数字员工类型">
-          <button class="active" type="button">数字员工</button>
+        <nav class="status-tabs" aria-label="数字员工页签">
+          <button
+            type="button"
+            :class="{ active: activeSection === 'skills' }"
+            @click="activeSection = 'skills'"
+          >
+            数字员工
+          </button>
+          <button
+            type="button"
+            :class="{ active: activeSection === 'workRecords' }"
+            @click="activeSection = 'workRecords'"
+          >
+            工作记录
+          </button>
         </nav>
 
+        <template v-if="activeSection === 'skills'">
         <div class="list-toolbar">
           <div class="filter-set">
             <label class="search-filter">
@@ -241,6 +255,12 @@
         <footer v-if="!loading && !errorMessage && visibleEmployees.length" class="list-foot">
           <span class="page-summary">当前展示 {{ visibleEmployees.length }} 条数字员工</span>
         </footer>
+        </template>
+
+        <DigitalEmployeeWorkRecords
+          v-else
+          class="digital-work-records-section"
+        />
       </article>
     </Transition>
 
@@ -264,6 +284,7 @@ import { computed, onMounted, ref } from 'vue'
 import AuditDigitalEmployeeDetail from '../components/audit/AuditDigitalEmployeeDetail.vue'
 import AuditPickerFilter from '../components/audit/AuditPickerFilter.vue'
 import DigitalEmployeeScheduleDialog from '../components/audit/DigitalEmployeeScheduleDialog.vue'
+import DigitalEmployeeWorkRecords from '../components/audit/DigitalEmployeeWorkRecords.vue'
 import TableEmptyState from '../components/shared/TableEmptyState.vue'
 import TableLoadingState from '../components/shared/TableLoadingState.vue'
 import { useSystemState } from '../composables/useSystemState.js'
@@ -305,6 +326,7 @@ const { toast } = useToast()
 const employees = ref([])
 const selectedEmployee = ref(null)
 const selectedEmployeeId = ref('')
+const activeSection = ref('skills')
 const keyword = ref('')
 const selectedStatus = ref('')
 const selectedEnabledState = ref('')