Scrollable chronological photo grid with full-screen viewer, fetching
previews from an Immich server via its REST API. Thumbnails stream in
on a background thread over a keep-alive connection. JPEG decoding is
done with libjpeg directly (vita2d's loader rejects Immich's
APP2-first JPEGs). JSON parsed with vendored jsmn (the vitasdk jansson
package is built as PIC, which vita-elf-create can't handle).
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
