Login: an interactive sign-in screen (server/email/password via the on-screen
keyboard, touch + d-pad, password masked) shown when there's no usable
credential or a config login fails, plus a "Try the demo server" button. The
bundled Immich logo is now the official transparent PNG (clean edges), drawn
minified on a slow spin for the startup loader.
Logout (cloud menu, top-left) returns to the sign-in screen instead of quitting;
on re-auth, reset_for_account_change() pauses the sync thread, drains the
thumbnail worker, recycles thumbnails, drops the old library/local/search state
and reloads from the new account. The thumbnail worker now builds its auth
header (and resolve list) per request, so a new token takes effect immediately
instead of looping on "invalid user token"; g_serverip is cleared on logout.
Grid: Square now drops focus to the grid AND hides the top bar in one press.
Verified against demo.immich.app (v2.7.5) over TLS 1.2: login, grid/search,
cloud page, logout -> Try demo account switch, all with working thumbnails.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
