Handle null exif.tags in getOffsetFromExif (#389)

Handle null exif.tags in getOffsetFromExif

`Object.values()` throws "Cannot convert undefined or null to object"
when `exif.tags` or `exifr` is null/undefined. This occurs when
uploading images that lack EXIF data (e.g., AI-generated images,
screenshots, or graphics). The issue is reproducible on Chrome but
not on Safari, likely due to differences in how each browser's
EXIF parsing pipeline populates these values.

This fix adds nullish coalescing fallbacks (`?? {}`) so that
`Object.values()` always receives a valid object.

* Fix optional chaining in getOffsetFromExif

If `exif` itself is null/undefined,
accessing `exif.tags` would throw before the `??` fallback kicks in.

src/utility/exif.ts

@@ -16,8 +16,8 @@ export const getOffsetFromExif = (
   exif: ExifData,
   exifr: any,
 ) => (
-  Object.values(exif.tags as any).find(isValueOffset) ||
-  Object.values(exifr).find(isValueOffset)
+  Object.values(exif?.tags ?? {}).find(isValueOffset) ||
+  Object.values(exifr ?? {}).find(isValueOffset)
 ) as string | undefined;
 
 export const getDimensionsFromExif = (