Tiles become the fifth entrance surface (data-tile-anim), switched on in App
Settings > Appearance > Tile Animations and OFF by default: the default is the
grid's own quick fade (`settle`), exactly as before.
A styled tile plays in two beats: its frame enters as it mounts (fly out of
its session tab, dealt from the Tiles button, CRT power-on, beam down from its
tab, cascade, pop, soft), and its screen then plays the terminal pane style of
the entrance theme when its first capture lands, through the same
html[data-term-anim] rules on .tile-body. Each style has its own exit when the
Tiles button closes the grid (back into the tabs, a CRT switch-off, ...).
Picking an Entrance Animations theme presets the tile style (new Launch theme:
tiles fly from the tabs); the theme readout ignores the tile row, so changing
it never shows "Custom". Frames move transform and opacity only (one fit and
one PTY resize per tile), a reload's restore always settles, and nothing moves
under reduced motion. The lab (?animlab=1) gets a Tile grid group, a cascade
order picker and in-place replay / close + reopen.
Also removes the terminal pane's `boot` entrance style (owner decision); a
saved `boot` falls back to off.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
