drawWorld draws <text> nodes itself (measure on change, glyphs in walk
order); static tilemap layers and particle emitters write into the batch
via drawTiles/drawParticles; drawUI renders ui.label/ui.panel with a
C-side HUD text queue shared with JS callers; widget ticks pick anchor,
container and theme candidates with a native filter. Adds
$.debug.memory(). native_passes_test covers all of it byte for byte.

Release, 2000: text 7.2 -> 1.8 ms, ui.label 4.7 -> 2.7, tilemap 1.9 -> 1.0,
particles 3.2 -> 2.3.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>