Both side panels had an exact width. They are now resizable egui panels
whose width lives in UiState (leftWidth / rightWidth, serde, sanitized on
load) so it survives panel switches, view changes and restarts; egui's
own remembered size is dropped each frame and only a drag of the edge
writes back (measured from the fixed edge to the pointer, so content
wider than the panel can't creep it). Limits: left 200–480 pt, right
250–520 pt, and the photo area keeps at least 360 pt; a narrower window
shrinks the panels without forgetting the chosen width. The bottom bar,
which sits between the panels, now drops Copy/Paste Edit Settings and
then the rating pill when its centre has no room instead of overlapping
the zoom controls. The unused left_w theme token is gone.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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