fix: inferStatus 考虑 status=ready，不再因 classification 未执行而显示处理中

当素材 status 为 ready 时，跳过 classification_status 检查，
直接根据 quality_score 显示状态（待诊断/合格/待优化/不合格）。
修复了 P0-4 验收中发现的：API 返回 ready 但 UI 显示处理中的 bug。

apps/web/src/pages/assets/AssetLibrary.tsx

@@ -69,11 +69,20 @@ const inferKind = (mimeType: string): AssetKind => {
   return "image";
 };
 
-/** 根据 quality_score 推断前端状态 */
+/** 根据 quality_score / classification_status / asset status 推断前端状态 */
 const inferStatus = (
   score?: number,
   classificationStatus?: string,
+  assetStatus?: string,
 ): { status: StatusType; label: string } => {
+  // 素材已就绪（status=ready）时，不应因 classification 未执行而显示"处理中"
+  if (assetStatus === "ready") {
+    if (score == null) return { status: "info", label: "待诊断" };
+    if (score >= 70) return { status: "ok", label: "合格" };
+    if (score >= 40) return { status: "warn", label: "待优化" };
+    return { status: "bad", label: "不合格" };
+  }
+  // 素材未就绪：classification 正在处理中
   if (
     classificationStatus === "processing" ||
     classificationStatus === "pending"
@@ -106,6 +115,7 @@ const mapAsset = (item: ApiAssetItem): AssetItem => {
   const { status, label } = inferStatus(
     item.quality_score ?? undefined,
     item.classification_status ?? undefined,
+    item.status ?? undefined,
   );
   const metadata = item.metadata || {};
   const kind = inferKind(item.mime_type || "");