style: 全局 UI 主题皮肤重构与样式模块化

引入 Element Plus 主题定制和主题皮肤 composable，将全局
样式拆分为组件级独立 CSS 文件（侧边栏、顶栏、工作台等），
统一色彩变量和间距规范，重构所有视图和组件样式以适配新
主题系统，优化图表和知识图谱组件视觉表现，提取审计和差
旅报销相关子组件。

web/src/views/scripts/LogsView.js

@@ -3,6 +3,7 @@ import { useRouter } from 'vue-router'
 
 import LogTrendChart from '../../components/charts/LogTrendChart.vue'
 import DonutChart from '../../components/charts/DonutChart.vue'
+import EnterpriseSelect from '../../components/shared/EnterpriseSelect.vue'
 import TableLoadingState from '../../components/shared/TableLoadingState.vue'
 import { fetchAgentRuns } from '../../services/agentAssets.js'
 import { fetchSystemLogEntries } from '../../services/systemLogs.js'
@@ -221,6 +222,7 @@ export default {
   components: {
     LogTrendChart,
     DonutChart,
+    EnterpriseSelect,
     TableLoadingState
   },
   emits: ['summary-change'],
@@ -237,20 +239,28 @@ export default {
     const systemLevelFilter = ref('')
     const systemEventTypeFilter = ref('')
     const systemLogEntries = ref([])
-    const currentPage = ref(1)
-    const pageSize = ref(10)
-    const pageSizes = [10, 20, 50]
-    const pageSizeOpen = ref(false)
+    const currentPage = ref(1)
+    const pageSize = ref(10)
+    const pageSizes = [10, 20, 50]
+    const pageSizeOptions = pageSizes.map((size) => ({ label: `${size} 条/页`, value: size }))
     let pollTimer = 0
 
     const isAdmin = computed(() => isManagerUser(currentUser.value))
     const filteredHermesRuns = computed(() => hermesRuns.value)
-    const systemLevelOptions = computed(() =>
-      Array.from(new Set(systemLogEntries.value.map((entry) => entry.level).filter(Boolean)))
-    )
-    const systemEventTypeOptions = computed(() =>
-      Array.from(new Set(systemLogEntries.value.map((entry) => entry.event_type).filter(Boolean)))
-    )
+    const systemLevelOptions = computed(() =>
+      Array.from(new Set(systemLogEntries.value.map((entry) => entry.level).filter(Boolean)))
+    )
+    const systemEventTypeOptions = computed(() =>
+      Array.from(new Set(systemLogEntries.value.map((entry) => entry.event_type).filter(Boolean)))
+    )
+    const systemLevelFilterOptions = computed(() => [
+      { label: '全部', value: '' },
+      ...systemLevelOptions.value
+    ])
+    const systemEventTypeFilterOptions = computed(() => [
+      { label: '全部', value: '' },
+      ...systemEventTypeOptions.value
+    ])
     const filteredSystemLogEntries = computed(() => {
       const keyword = systemSearchKeyword.value.trim().toLowerCase()
       return systemLogEntries.value.filter((entry) => {
@@ -330,11 +340,10 @@ export default {
       return filteredSystemLogEntries.value.slice(start, start + pageSize.value)
     })
 
-    function changePageSize(size) {
-      pageSize.value = size
-      pageSizeOpen.value = false
-      currentPage.value = 1
-    }
+    function changePageSize(size) {
+      pageSize.value = size
+      currentPage.value = 1
+    }
 
     async function loadHermesRuns() {
       if (!isAdmin.value) {
@@ -456,8 +465,8 @@ export default {
       loadSystemLogs,
       currentPage,
       pageSize,
-      pageSizeOpen,
-      pageSizes,
+      pageSizes,
+      pageSizeOptions,
       resolveLevelTone,
       resolveRunLevel,
       resolveRunModuleLabel,
@@ -472,10 +481,12 @@ export default {
       runningRunCount,
       selectRun,
       selectSystemLog,
-      systemEventTypeFilter,
-      systemEventTypeOptions,
-      systemLevelFilter,
-      systemLevelOptions,
+      systemEventTypeFilter,
+      systemEventTypeFilterOptions,
+      systemEventTypeOptions,
+      systemLevelFilter,
+      systemLevelFilterOptions,
+      systemLevelOptions,
       systemLogEntries,
       systemLogLoading,
       systemSearchKeyword,