fix: remove presigned branding upload (#3053)

packages/lib/utils/images/logo.ts

@@ -8,3 +8,15 @@ export const loadLogo = async (file: Uint8Array) => {
     content,
   };
 };
+
+/**
+ * Validate and sanitise an uploaded branding logo. Re-encoding through `sharp`
+ * proves the bytes are a real raster image and strips any embedded payloads.
+ * Throws if the input cannot be parsed as an image.
+ */
+export const optimiseBrandingLogo = async (input: Buffer | Uint8Array): Promise<Buffer> => {
+  return await sharp(input)
+    .resize(512, 512, { fit: 'inside', withoutEnlargement: true })
+    .png({ quality: 80 })
+    .toBuffer();
+};