The preview copy behind the stage stopped at PREVIEW_HARD_MAX (3200) whatever
the photo was. A 5729px frame opened from Immich, zoomed past 3200 device
pixels, was painted from a 3200px copy stretched over the screen — soft enough
for a reader to call it the thumbnail having opened.
The ceiling is now the photo's own longest edge. `resizedJpeg` never grows a
photo, so at that size it hands the original bytes straight back, and the copy
still only grows when the stage says it needs it: at fitting size the 1600px
one stands and the edit keeps its old cost.
Measured on the operator's own Immich asset (5729x3820, retina 2x, opened on
the stage and zoomed 12 notches in): the stage held 3200x2134 before and
5729x3820 after.
3dtours
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