feat: 邮箱注册验证 + 9项功能修复与优化

【认证系统】
- 新增邮箱验证码注册/登录流程 (sendEmailCode / verifyEmail / forgotPassword / resetPassword)
- register-email 现在需要验证码
- 服务端新增 email_verification_codes 表 + patch-email-verification.js
- App.tsx 登录后 emailVerified 检查提醒
- keyServerClient token 显式传递修复 401 错误

【电商模块】
- 自动推进: 策划完成后自动生成分镜图/视频
- 模特图选项 (性别/年龄/种族/体型/场景) 注入 AI 提示词
- 任务持久化指纹修复 (图片数量替代 blob URL)
- 新增「视频换装」入口 (happyhorse-1.0-video-edit)

【剧本评分】
- 新增 .docx/.doc Word 文档支持 (ZIP解压+XML提取)
- 历史记录支持点击查看/恢复评测结果

【画布】
- ReactFlow 节点禁止内置拖拽避免冲突
- 连接线拖拽弹窗优化 (预览线不消失, 弹窗跟踪鼠标)

【页面修复】
- 首页轮播图改为 aspect-ratio: 16/9 解决尺寸问题
- 资产库新增悬停删除按钮
- scriptEvalClient 改用服务端 /api/ai/chat 端点
- TokenUsagePage 未登录跳过 API 调用

src/features/assets/AssetsPage.tsx

@@ -100,14 +100,14 @@ function AssetsPage({ isAuthenticated, onOpenLogin }: AssetsPageProps) {
     setContextMenu({ x: e.clientX, y: e.clientY, asset });
   }, []);
 
-  const handleDeleteAsset = useCallback(async () => {
-    if (!contextMenu) return;
-    const { asset } = contextMenu;
+  const handleDeleteAsset = useCallback(async (asset?: LibraryAssetItem) => {
+    const target = asset || contextMenu?.asset;
+    if (!target) return;
     setContextMenu(null);
     try {
-      await assetClient.delete(asset.id);
-      setServerAssets((prev) => prev.filter((a) => a.id !== asset.id));
-      setServerNotice(`已删除 ${asset.name}`);
+      await assetClient.delete(target.id);
+      setServerAssets((prev) => prev.filter((a) => a.id !== target.id));
+      setServerNotice(`已删除 ${target.name}`);
     } catch (err) {
       setServerNotice(err instanceof Error ? err.message : "删除失败");
     }
@@ -287,32 +287,42 @@ function AssetsPage({ isAuthenticated, onOpenLogin }: AssetsPageProps) {
           {visibleAssets.length ? (
             <div className="asset-grid asset-grid--desktop motion-stagger">
               {visibleAssets.map((asset) => (
-                <button
-                  key={asset.id}
-                  type="button"
-                  className="asset-card asset-card--desktop"
-                  onClick={() => setPreviewAsset(asset)}
-                  onContextMenu={(e) => handleContextMenu(e, asset)}
-                  aria-label={`预览素材 ${asset.name}`}
-                >
-                  <div className={`asset-card__thumb ${asset.thumbClass}`}>
-                    {asset.imageUrl ? <OptimizedImage src={asset.imageUrl} alt={asset.name} /> : null}
-                  </div>
-                  <div className="asset-card__body">
-                    <div className="asset-card__head">
-                      <strong>{asset.name}</strong>
-                      <span className={`studio-status-bar__badge ${statusBadgeClass[asset.status]}`}>
-                        {statusLabel[asset.status]}
-                      </span>
+                <div key={asset.id} className="asset-card-wrapper">
+                  <button
+                    type="button"
+                    className="asset-card asset-card--desktop"
+                    onClick={() => setPreviewAsset(asset)}
+                    onContextMenu={(e) => handleContextMenu(e, asset)}
+                    aria-label={`预览素材 ${asset.name}`}
+                  >
+                    <div className={`asset-card__thumb ${asset.thumbClass}`}>
+                      {asset.imageUrl ? <OptimizedImage src={asset.imageUrl} alt={asset.name} /> : null}
                     </div>
-                    <p className="asset-card__desc">{asset.description}</p>
-                    <div className="asset-card__tags">
-                      {asset.tags.slice(0, 2).map((tag) => (
-                        <span key={tag}>{tag}</span>
-                      ))}
+                    <div className="asset-card__body">
+                      <div className="asset-card__head">
+                        <strong>{asset.name}</strong>
+                        <span className={`studio-status-bar__badge ${statusBadgeClass[asset.status]}`}>
+                          {statusLabel[asset.status]}
+                        </span>
+                      </div>
+                      <p className="asset-card__desc">{asset.description}</p>
+                      <div className="asset-card__tags">
+                        {asset.tags.slice(0, 2).map((tag) => (
+                          <span key={tag}>{tag}</span>
+                        ))}
+                      </div>
                     </div>
-                  </div>
-                </button>
+                  </button>
+                  <button
+                    type="button"
+                    className="asset-card__delete"
+                    title="删除素材"
+                    onClick={(e) => { e.stopPropagation(); void handleDeleteAsset(asset); }}
+                    aria-label={`删除 ${asset.name}`}
+                  >
+                    <DeleteOutlined />
+                  </button>
+                </div>
               ))}
             </div>
           ) : isLoading ? (