fix(media): suppress exif_read_data() warnings on malformed JPEGs

Reading the EXIF orientation of a JPEG called exif_read_data() without
error suppression, so a file with a broken EXIF block emitted

fix(media): suppress exif_read_data() warnings on malformed JPEGs

Reading the EXIF orientation of a JPEG called exif_read_data() without
error suppression, so a file with a broken EXIF block emitted a warning
that the error handler logged on every media manager, detail page and
media diff render.

Bump slika to 1.2.1, which suppresses the warning at the source.

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fix(media): don't upscale small images in the detail previews

The detail page, media manager and media diff requested a bounding-box
resize at the full box size, so an image smaller than the box was

fix(media): don't upscale small images in the detail previews

The detail page, media manager and media diff requested a bounding-box
resize at the full box size, so an image smaller than the box was enlarged
and fetch.php generated and cached the upscaled copy.

slika 1.2 adds an $upscale option to resize/crop. getDisplayDimensions()
now takes a $fit flag mirroring fetch.php one to one and predicts the
matching no-upscale dimensions, media_resize_image()/media_mod_image()
forward $upscale, and fetch.php disables upscaling for fit=1 requests.
In-page image scaling is unchanged.

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fix EXIF-rotated images shown cropped in previews, closes #4482

JPEGs with EXIF orientation 5/6/7/8 were rendered cropped in the
mediamanager detail view, the image diff view and the fullscreen
deta

fix EXIF-rotated images shown cropped in previews, closes #4482

JPEGs with EXIF orientation 5/6/7/8 were rendered cropped in the
mediamanager detail view, the image diff view and the fullscreen
detail page: getimagesize() / JpegMeta report raw (rotation-unaware)
pixel dimensions, and passing both w and h to fetch.php defaults to
center-crop.

- Bump splitbrain/slika to 1.1, which ships ImageInfo: a rotation-
aware, metadata-only dimension simulator mirroring Adapter's
fluent API (autorotate/resize/crop).
- Add fit=1 to fetch.php: when both w and h are given, route to
media_resize_image() (bbox fit) instead of media_crop_image().
Token hashes only (id, w, h) so existing tokens stay valid.
- Add MediaFile::getDisplayDimensions($w, $h, $crop) which delegates
to ImageInfo and returns the dims fetch.php would produce.
- Add Display::getDetailHtml() and retire media_preview() / the old
media_image_preview_size() helper. media_tab_view and MediaDiff
now share the Display-based renderer.
- Rewrite tpl_img() (lib/tpl/*/detail.php) to use MediaFile dims +
fit=1 URL; drops the manual ratio math.
- Tests: MediaFileTest covers the dims math, DisplayTest covers the
detail-view HTML (rotated dims, rev-vs-timestamp URL selection,
structure), fetch_imagetoken gains a fit-token compat test.
Fixture _test/data/media/wiki/exif-orient-6.jpg: 20x30 JPEG with
EXIF orientation 6.

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