Merge PR #70: feat(frontend): 优化弹窗组件架构和用户体验

## 主要变更

### 对话框系统重构
- 升级 BaseDialog 组件，添加动画、焦点管理、响应式宽度
- 删除旧的 Modal.vue，统一使用 BaseDialog

### 使用量数据导出升级
- 改为 Excel 格式导出，支持分页全量导出
- 添加导出进度对话框，支持取消操作
- 新增依赖：xlsx、file-saver

### 使用量页面优化
- Token 明细悬浮提示
- 请求 ID 一键复制
- 新增 first_token 列

### 后端修复
- 账户统计查询添加软删除过滤

## 冲突解决
- 保留 driver.js 依赖（onboarding 功能需要）
- 合并 package.json 变更

frontend/src/style.css

@@ -79,6 +79,20 @@
     @apply hover:from-red-600 hover:to-red-700 hover:shadow-lg hover:shadow-red-500/30;
   }
 
+  .btn-success {
+    @apply bg-gradient-to-r from-emerald-500 to-emerald-600;
+    @apply text-white shadow-md shadow-emerald-500/25;
+    @apply hover:from-emerald-600 hover:to-emerald-700 hover:shadow-lg hover:shadow-emerald-500/30;
+    @apply dark:shadow-emerald-500/20;
+  }
+
+  .btn-warning {
+    @apply bg-gradient-to-r from-amber-500 to-amber-600;
+    @apply text-white shadow-md shadow-amber-500/25;
+    @apply hover:from-amber-600 hover:to-amber-700 hover:shadow-lg hover:shadow-amber-500/30;
+    @apply dark:shadow-amber-500/20;
+  }
+
   .btn-sm {
     @apply rounded-lg px-3 py-1.5 text-xs;
   }
@@ -130,6 +144,20 @@
     -moz-appearance: textfield;
   }
 
+  /* ============ 玻璃效果 ============ */
+  .glass {
+    @apply bg-white/80 backdrop-blur-xl dark:bg-dark-800/80;
+  }
+
+  .glass-card {
+    @apply bg-white/70 dark:bg-dark-800/70;
+    @apply backdrop-blur-xl;
+    @apply rounded-2xl;
+    @apply border border-white/20 dark:border-dark-700/50;
+    @apply shadow-glass;
+    @apply transition-all duration-300;
+  }
+
   /* ============ 卡片样式 ============ */
   .card {
     @apply bg-white dark:bg-dark-800/50;
@@ -151,6 +179,20 @@
     @apply shadow-glass;
   }
 
+  .card-header {
+    @apply border-b border-gray-100 dark:border-dark-700;
+    @apply px-6 py-4;
+  }
+
+  .card-body {
+    @apply p-6;
+  }
+
+  .card-footer {
+    @apply border-t border-gray-100 dark:border-dark-700;
+    @apply px-6 py-4;
+  }
+
   /* ============ 统计卡片 ============ */
   .stat-card {
     @apply card p-5;
@@ -256,6 +298,10 @@
     @apply bg-gray-100 text-gray-700 dark:bg-dark-700 dark:text-dark-300;
   }
 
+  .badge-purple {
+    @apply bg-purple-100 text-purple-700 dark:bg-purple-900/30 dark:text-purple-400;
+  }
+
   /* ============ 下拉菜单 ============ */
   .dropdown {
     @apply absolute z-50;
@@ -283,15 +329,19 @@
   }
 
   .modal-content {
+    @apply w-full;
+    @apply max-h-[95vh] sm:max-h-[90vh];
     @apply bg-white dark:bg-dark-800;
     @apply rounded-2xl shadow-2xl;
-    @apply w-full;
-    @apply max-h-[90vh] overflow-y-auto;
+    @apply border border-gray-200 dark:border-dark-700;
+    @apply flex flex-col;
   }
 
   .modal-header {
-    @apply border-b border-gray-100 px-6 py-4 dark:border-dark-700;
+    @apply border-b border-gray-200 px-4 py-3 dark:border-dark-700;
+    @apply sm:px-6 sm:py-4;
     @apply flex items-center justify-between;
+    @apply flex-shrink-0;
   }
 
   .modal-title {
@@ -299,12 +349,69 @@
   }
 
   .modal-body {
-    @apply px-6 py-4;
+    @apply px-4 py-3;
+    @apply sm:px-6 sm:py-4;
+    @apply flex-1 overflow-y-auto;
   }
 
   .modal-footer {
-    @apply border-t border-gray-100 px-6 py-4 dark:border-dark-700;
+    @apply border-t border-gray-200 px-4 py-3 dark:border-dark-700;
+    @apply sm:px-6 sm:py-4;
     @apply flex items-center justify-end gap-3;
+    @apply flex-shrink-0;
+  }
+
+  /* 防止body滚动的工具类 */
+  body.modal-open {
+    overflow: hidden;
+  }
+
+  .modal-enter-active {
+    transition: opacity 250ms ease-out;
+  }
+
+  .modal-leave-active {
+    transition: opacity 200ms ease-in;
+  }
+
+  .modal-enter-from,
+  .modal-leave-to {
+    opacity: 0;
+  }
+
+  .modal-enter-active .modal-content {
+    transition: transform 250ms ease-out, opacity 250ms ease-out;
+  }
+
+  .modal-leave-active .modal-content {
+    transition: transform 200ms ease-in, opacity 200ms ease-in;
+  }
+
+  .modal-enter-from .modal-content,
+  .modal-leave-to .modal-content {
+    transform: scale(0.95);
+    opacity: 0;
+  }
+
+  .modal-enter-to .modal-content,
+  .modal-leave-from .modal-content {
+    transform: scale(1);
+    opacity: 1;
+  }
+
+  @media (prefers-reduced-motion: reduce) {
+    .modal-enter-active,
+    .modal-leave-active,
+    .modal-enter-active .modal-content,
+    .modal-leave-active .modal-content {
+      transition-duration: 1ms;
+      transition-delay: 0ms;
+    }
+
+    .modal-enter-from .modal-content,
+    .modal-leave-to .modal-content {
+      transform: none;
+    }
   }
 
   /* ============ Dialog ============ */