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/common/BaseDialog.vue

@@ -21,15 +21,7 @@
               class="-mr-2 rounded-xl p-2 text-gray-400 transition-colors hover:bg-gray-100 hover:text-gray-600 dark:text-dark-500 dark:hover:bg-dark-700 dark:hover:text-dark-300"
               aria-label="Close modal"
             >
-              <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="M6 18L18 6M6 6l12 12" />
-              </svg>
+              <Icon name="x" size="md" />
             </button>
           </div>
 
@@ -50,6 +42,7 @@
 
 <script setup lang="ts">
 import { computed, watch, onMounted, onUnmounted, ref, nextTick } from 'vue'
+import Icon from '@/components/icons/Icon.vue'
 
 // 生成唯一ID以避免多个对话框时ID冲突
 let dialogIdCounter = 0