feat: standardize product asset inputs

api/main.py

@@ -4277,13 +4277,14 @@ def normalize_product_asset_image(src: Path, out: Path) -> dict:
 
         out.parent.mkdir(parents=True, exist_ok=True)
         img.save(out, "JPEG", quality=PRODUCT_ASSET_JPEG_QUALITY, optimize=True, progressive=True, subsampling=0)
+        work_width, work_height = img.size
 
     return {
         "standard": f"AI工作副本：最长边≤{PRODUCT_ASSET_MAX_SIDE}px，建议长边≥{PRODUCT_ASSET_MIN_LONG_SIDE}px，短边≥{PRODUCT_ASSET_MIN_SHORT_SIDE}px，JPEG q{PRODUCT_ASSET_JPEG_QUALITY}",
         "original_width": original_width,
         "original_height": original_height,
-        "width": img.width,
-        "height": img.height,
+        "width": work_width,
+        "height": work_height,
         "original_bytes": original_bytes,
         "work_bytes": out.stat().st_size if out.exists() else 0,
         "max_side": PRODUCT_ASSET_MAX_SIDE,