The boot IIFE unconditionally overwrote localStorage with whatever
settings.json had on the server. If the appearance autosave POST
ever failed (network glitch, transient error) the next page load
would revert the user's chosen theme/skin to the server's stale
defaults.
Fix: reconcile localStorage against the server on boot. When
localStorage carries a non-default skin or system theme (the user
explicitly chose something), localStorage wins and the fix pushes
those values back to the server. When localStorage is at defaults
(new browser / first visit), the server still wins.
Tested scenarios:
- User chose non-default skin, autosave failed → preserved + reconciled
- New browser, server has non-default skin → server value applied
- Normal use (autosave works) → unchanged behavior
45fe6294f9
