Cycling backdrops reach a fallback path only once every rotating path
has failed to load, but every hero passed the rotation-agnostic backdrop
list as the rotation set and the aspect-ordered candidates as the
fallback. One servable wide backdrop was therefore enough to hide the
square background for good, so phone detail and Discover heroes
cover-fitted a 16:9 backdrop into a portrait box instead of showing the
square image Plex supplies.
Give the rotation set the same aspect-aware preference the candidate
list already has: near-square containers rotate the square background
alone and keep the backdrops behind it as fallbacks.
close#1700
Consolidates duplicated logic behind shared implementations — paginated
grid tabs, focus chrome, cached remote stores, sheet selection columns,
the server artifact store and a test fixture layer — and removes code
that had become unreachable. Net reduction of about 5,500 lines with no
behaviour change.
Where a fix had landed separately in code that moved into a shared
helper, the fix was re-applied inside the helper rather than left behind
in the copy that went away.
Focus chrome was implemented twice, once in the focusable wrapper and once
in the focus builders; both now go through FocusChrome. TvColorPicker's
channel row was a copy of TvNumberSpinner and is now that widget in compact
density.
Also trims unused helpers and fields and simplifies the Jellyfin browse
paths.
edde746