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/user/UserCreateModal.vue

@@ -17,7 +17,7 @@
             <input v-model="form.password" type="text" required class="input pr-10" :placeholder="t('admin.users.enterPassword')" />
           </div>
           <button type="button" @click="generateRandomPassword" class="btn btn-secondary px-3">
-            <svg class="h-5 w-5" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="1.5" 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>
+            <Icon name="refresh" size="md" />
           </button>
         </div>
       </div>
@@ -52,6 +52,7 @@ import { reactive, watch } from 'vue'
 import { useI18n } from 'vue-i18n'; import { adminAPI } from '@/api/admin'
 import { useForm } from '@/composables/useForm'
 import BaseDialog from '@/components/common/BaseDialog.vue'
+import Icon from '@/components/icons/Icon.vue'
 
 const props = defineProps<{ show: boolean }>()
 const emit = defineEmits(['close', 'success']); const { t } = useI18n()

frontend/src/components/admin/user/UserEditModal.vue

@@ -21,7 +21,7 @@
             </button>
           </div>
           <button type="button" @click="generatePassword" class="btn btn-secondary px-3">
-            <svg class="h-5 w-5" fill="none" stroke="currentColor" viewBox="0 0 24 24" stroke-width="1.5"><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>
+            <Icon name="refresh" size="md" />
           </button>
         </div>
       </div>
@@ -59,6 +59,7 @@ import { adminAPI } from '@/api/admin'
 import type { User, UserAttributeValuesMap } from '@/types'
 import BaseDialog from '@/components/common/BaseDialog.vue'
 import UserAttributeForm from '@/components/user/UserAttributeForm.vue'
+import Icon from '@/components/icons/Icon.vue'
 
 const props = defineProps<{ show: boolean, user: User | null }>()
 const emit = defineEmits(['close', 'success'])
@@ -106,4 +107,4 @@ const handleUpdateUser = async () => {
     appStore.showError(e.response?.data?.detail || t('admin.users.failedToUpdate'))
   } finally { submitting.value = false }
 }
-</script>
+</script>