Extract the copy-pasted "re-resolve on theme repaint" MutationObserver into a
shared hooks/use-theme-epoch (useThemeEpoch + onThemeRepaint) and consume it
from the star map, image-gen placeholder, and useIsDark instead of each hand-
rolling its own root observer. Keeps the post-paint read the canvas probes need
(useTheme() would read stale CSS — child effects run before applyTheme).
Also: light-mode band depth (inner wash), travelling-glow core scramble, and
dark-only timeline bloom.
Brooklyn Nicholson
b6e57e215b