AI Implementation feature(898): Admin Area General Settings and Categories 1.16 (#38)

backend/src/modules/uploads/uploads.controller.ts

@@ -65,6 +65,9 @@ export class UploadsController {
   private static readonly LOGO_ERROR_MESSAGE =
     'Logo must be a valid PNG, JPEG, GIF, or WebP image.';
 
+  private static readonly CATEGORY_ICON_ERROR_MESSAGE =
+    'Category icon must be a valid PNG, JPEG, GIF, or WebP image.';
+
   private async handleCategoryIcon(req: any): Promise<{ id: string; publicUrl: string; width: number; height: number; mimeType: string; storedPath: string; size: number; originalFilename: string }> {
     const file = req.file as any;
     if (!file) throw new BadRequestException('No file uploaded under field "file"');
@@ -82,25 +85,19 @@ export class UploadsController {
     const fileName = hasId ? `${categoryId}.png` : safeFilename(file.originalname || 'file.png');
     const finalPath = path.join(finalDir, fileName);
 
-    let width = 0;
-    let height = 0;
-    let mimeType = file.mimetype || 'application/octet-stream';
-    let stored: Buffer = file.buffer;
+    let stored: Buffer;
     try {
       stored = await sharp(file.buffer)
         .resize(128, 128, { fit: 'cover', position: 'centre' })
         .png()
         .toBuffer();
-      width = 128;
-      height = 128;
-      mimeType = 'image/png';
     } catch {
-      // Sharp could not parse this buffer as a supported image format
-      // (this is the case for the legacy integration-test fixture which
-      // uploads text bytes). Fall back to storing the raw payload so the
-      // upload endpoint remains available to legacy callers.
+      throw new BadRequestException(UploadsController.CATEGORY_ICON_ERROR_MESSAGE);
     }
     fs.writeFileSync(finalPath, stored);
+    const width = 128;
+    const height = 128;
+    const mimeType = 'image/png';
     return {
       id: fileName,
       originalFilename: file.originalname || 'file.png',