Safari blocks SameSite=Lax cookies on <img> subresource requests,
causing 401 errors when loading Immich thumbnails and originals.
Replaced the token-based <img src> approach with direct fetch()
using credentials: 'include', which reliably sends cookies across
all browsers. Images are now loaded as blobs with ObjectURLs.
Added a concurrency limiter (max 6 parallel fetches) to prevent
ERR_INSUFFICIENT_RESOURCES when many photos load simultaneously.
Queue is cleared when the photo picker closes so gallery images
load immediately.
6ba5df0215