feat: 首页素材点击查看详情，支持下载

- 后端 GetRecentAssets 增加 projectName/width/height/projectId 字段
- 前端 AssetGallery 点击图片弹出详情弹窗：提示词/工程/分辨率/格式
- 详情弹窗提供下载按钮，走 /api/v1/assets/download?key= 接口

backend/internal/handler/generate.go

@@ -308,14 +308,18 @@ func getTaskDBID(ctx context.Context, taskID string) uint {
 
 // RecentAssetItem 首页素材展示项。
 type RecentAssetItem struct {
-	Key       string `json:"key"`
+	Key         string `json:"key"`
-	URL       string `json:"url"`
+	URL         string `json:"url"`
-	Format    string `json:"format"`
+	Format      string `json:"format"`
-	Prompt    string `json:"prompt"`
+	Prompt      string `json:"prompt"`
-	AssetType string `json:"assetType"`
+	AssetType   string `json:"assetType"`
-	MetaType  string `json:"metaType"` // frame / spritesheet / preview
+	MetaType    string `json:"metaType"`
-	TaskID    string `json:"taskId"`
+	TaskID      string `json:"taskId"`
-	CreatedAt string `json:"createdAt"`
+	ProjectID   string `json:"projectId"`
+	ProjectName string `json:"projectName"`
+	Width       int    `json:"width"`
+	Height      int    `json:"height"`
+	CreatedAt   string `json:"createdAt"`
 }
 
 // GetRecentAssets 获取最近生成的素材列表（已完成任务的全部素材）。
@@ -323,23 +327,31 @@ func GetRecentAssets(c *gin.Context) {
 	limit := 60
 
 	var dbRows []struct {
-		Key       string
+		Key         string
-		URL       string
+		URL         string
-		Format    string
+		Format      string
-		Prompt    string
+		Prompt      string
-		AssetType string
+		AssetType   string
-		MetaType  string
+		MetaType    string
-		TaskID    string
+		TaskID      string
-		ProjectID uint
+		ProjectID   uint
-		CreatedAt string
+		ProjectName string
+		Width       int
+		Height      int
+		CreatedAt   string
 	}
 
 	db.GetDB().WithContext(c.Request.Context()).
 		Raw(`SELECT a.key, a.url, a.format, t.prompt, t.asset_type as asset_type,
 			COALESCE(json_extract(a.metadata, '$.type'), 'frame') as meta_type,
-			t.external_id as task_id, t.project_id, t.created_at as created_at
+			t.external_id as task_id, t.project_id,
+			p.name as project_name,
+			CAST(COALESCE(json_extract(t.metadata, '$.frameWidth'), '0') AS INTEGER) as width,
+			CAST(COALESCE(json_extract(t.metadata, '$.frameHeight'), '0') AS INTEGER) as height,
+			t.created_at as created_at
 			FROM assets a
 			INNER JOIN tasks t ON a.task_id = t.id
+			INNER JOIN projects p ON t.project_id = p.id
 			WHERE t.status = 'completed'
 			ORDER BY a.created_at DESC
 			LIMIT ?`, limit).
@@ -348,14 +360,18 @@ func GetRecentAssets(c *gin.Context) {
 	result := make([]RecentAssetItem, len(dbRows))
 	for i, r := range dbRows {
 		result[i] = RecentAssetItem{
-			Key:       r.Key,
+			Key:         r.Key,
-			URL:       storageSvc.GetSignedURL(r.Key),
+			URL:         storageSvc.GetSignedURL(r.Key),
-			Format:    r.Format,
+			Format:      r.Format,
-			Prompt:    r.Prompt,
+			Prompt:      r.Prompt,
-			AssetType: r.AssetType,
+			AssetType:   r.AssetType,
-			MetaType:  r.MetaType,
+			MetaType:    r.MetaType,
-			TaskID:    r.TaskID,
+			TaskID:      r.TaskID,
-			CreatedAt: r.CreatedAt,
+			ProjectID:   fmt.Sprintf("%d", r.ProjectID),
+			ProjectName: r.ProjectName,
+			Width:       r.Width,
+			Height:      r.Height,
+			CreatedAt:   r.CreatedAt,
 		}
 	}
 

frontend/src/api/types.ts

@@ -107,6 +107,10 @@ export interface RecentAssetItem {
   assetType: string
   metaType: string
   taskId: string
+  projectId: string
+  projectName: string
+  width: number
+  height: number
   createdAt: string
 }
 

frontend/src/components/AssetGallery.tsx

@@ -37,10 +37,117 @@ function matchCategory(item: RecentAssetItem, cat: string): boolean {
   }
 }
 
+function DetailModal({ item, onClose }: { item: RecentAssetItem; onClose: () => void }) {
+  const downloadUrl = `/api/v1/assets/download?key=${encodeURIComponent(item.key)}`
+
+  return (
+    <div
+      style={{
+        position: 'fixed',
+        inset: 0,
+        zIndex: 1000,
+        display: 'flex',
+        alignItems: 'center',
+        justifyContent: 'center',
+      }}
+      onClick={onClose}
+    >
+      <div
+        style={{ position: 'absolute', inset: 0, background: 'rgba(0,0,0,0.6)' }}
+      />
+      <div
+        className="card"
+        style={{
+          position: 'relative',
+          zIndex: 1,
+          maxWidth: 640,
+          width: '90%',
+          maxHeight: '90vh',
+          overflow: 'auto',
+          padding: 24,
+        }}
+        onClick={e => e.stopPropagation()}
+      >
+        <button
+          onClick={onClose}
+          style={{
+            position: 'absolute',
+            top: 12,
+            right: 12,
+            background: 'transparent',
+            border: 'none',
+            fontSize: 20,
+            cursor: 'pointer',
+            color: 'var(--text-secondary)',
+            lineHeight: 1,
+          }}
+        >
+          x
+        </button>
+
+        <div
+          style={{
+            width: '100%',
+            background: 'var(--bg-input)',
+            borderRadius: 'var(--radius)',
+            display: 'flex',
+            alignItems: 'center',
+            justifyContent: 'center',
+            marginBottom: 20,
+            minHeight: 200,
+          }}
+        >
+          <img
+            src={item.url}
+            alt={item.prompt}
+            style={{ maxWidth: '100%', maxHeight: 400, objectFit: 'contain' }}
+          />
+        </div>
+
+        <table style={{ width: '100%', fontSize: 13, borderCollapse: 'collapse' }}>
+          <tbody>
+            <Row label="提示词" value={item.prompt} />
+            <Row label="工程" value={item.projectName} />
+            <Row label="素材类型" value={`${ASSET_TYPE_LABELS[item.assetType] || item.assetType} / ${item.metaType}`} />
+            <Row label="分辨率" value={item.width > 0 ? `${item.width} x ${item.height}` : '—'} />
+            <Row label="格式" value={item.format} />
+          </tbody>
+        </table>
+
+        <div style={{ marginTop: 20, display: 'flex', gap: 12, justifyContent: 'flex-end' }}>
+          <a
+            href={downloadUrl}
+            className="btn-primary"
+            style={{ textDecoration: 'none', padding: '8px 24px', fontSize: 14 }}
+            download
+          >
+            下载
+          </a>
+          <button className="btn-secondary" onClick={onClose} style={{ padding: '8px 24px', fontSize: 14 }}>
+            关闭
+          </button>
+        </div>
+      </div>
+    </div>
+  )
+}
+
+function Row({ label, value }: { label: string; value: string }) {
+  return (
+    <tr>
+      <td style={{ padding: '6px 12px 6px 0', color: 'var(--text-secondary)', whiteSpace: 'nowrap', verticalAlign: 'top', width: 80 }}>
+        {label}
+      </td>
+      <td style={{ padding: '6px 0', wordBreak: 'break-all' }}>{value}</td>
+    </tr>
+  )
+}
+
 export default function AssetGallery() {
   const [assets, setAssets] = useState<RecentAssetItem[]>([])
   const [loading, setLoading] = useState(true)
   const [activeCat, setActiveCat] = useState('all')
+  const [detailItem, setDetailItem] = useState<RecentAssetItem | null>(null)
 
   useEffect(() => {
     getRecentAssets()
@@ -99,7 +206,8 @@ export default function AssetGallery() {
             <div
               key={`${item.taskId}-${i}`}
               className="card"
-              style={{ padding: 8 }}
+              style={{ padding: 8, cursor: 'pointer' }}
+              onClick={() => setDetailItem(item)}
             >
               <div
                 style={{
@@ -153,6 +261,11 @@ export default function AssetGallery() {
           ))}
         </div>
       )}
+
+      {/* 详情弹窗 */}
+      {detailItem && (
+        <DetailModal item={detailItem} onClose={() => setDetailItem(null)} />
+      )}
     </section>
   )
 }