refactor(frontend): 完成所有组件的内联SVG统一替换为Icon组件

- 扩展 Icon.vue 组件，新增 60+ 图标路径
  - 导航类: arrowRight, arrowLeft, arrowUp, arrowDown, chevronUp, externalLink
  - 状态类: checkCircle, xCircle, exclamationCircle, exclamationTriangle, infoCircle
  - 用户类: user, userCircle, userPlus, users
  - 文档类: document, clipboard, copy, inbox
  - 操作类: download, upload, filter, sort
  - 安全类: key, lock, shield
  - UI类: menu, calendar, home, terminal, gift, creditCard, mail
  - 数据类: chartBar, trendingUp, database, cube
  - 其他: bolt, sparkles, cloud, server, sun, moon, book 等

- 重构 56 个 Vue 组件，用 Icon 组件替换内联 SVG
  - 净减少约 2200 行代码
  - 提升代码可维护性和一致性
  - 统一图标样式和尺寸管理

frontend/src/components/admin/account/AccountTableActions.vue

@@ -1,11 +1,19 @@
 <template>
   <div class="flex flex-wrap items-center gap-3">
-    <button @click="$emit('refresh')" :disabled="loading" class="btn btn-secondary"><svg :class="['h-5 w-5', loading ? 'animate-spin' : '']" fill="none" viewBox="0 0 24 24" stroke="currentColor"><path stroke-linecap="round" stroke-linejoin="round" d="M16.023 9.348h4.992v-.001M2.985 19.644v-4.992m0 0h4.992m-4.993 0l3.181 3.183a8.25 8.25 0 0013.803-3.7M4.031 9.865a8.25 8.25 0 0113.803-3.7l3.181 3.182m0-4.991v4.99" /></svg></button>
+    <button @click="$emit('refresh')" :disabled="loading" class="btn btn-secondary">
+      <Icon name="refresh" size="md" :class="[loading ? 'animate-spin' : '']" />
+    </button>
     <button @click="$emit('sync')" class="btn btn-secondary">{{ t('admin.accounts.syncFromCrs') }}</button>
     <button @click="$emit('create')" class="btn btn-primary">{{ t('admin.accounts.createAccount') }}</button>
   </div>
 </template>
 
 <script setup lang="ts">
-import { useI18n } from 'vue-i18n'; defineProps(['loading']); defineEmits(['refresh', 'sync', 'create']); const { t } = useI18n()
+import { useI18n } from 'vue-i18n'
+import Icon from '@/components/icons/Icon.vue'
+
+defineProps(['loading'])
+defineEmits(['refresh', 'sync', 'create'])
+
+const { t } = useI18n()
 </script>