Two things a genuinely fresh instance surfaced that no existing profile could.
The renderer's mode fell back to `light` when nothing was stored, so a
dark-mode desktop opened a white window on first launch. Main already
defaulted its own themeSource to `system`, so the two disagreed at boot — and
once translucency became per-appearance it also handed those users light's
much heavier tint, tuned for a bright desktop they don't have. Both the
normalizer and the SSR fallback now say `system`; an explicit choice still
wins.
The accent plugin reached straight into `@/components` and `@/themes`, which
the plugin lint rule exists to prevent: plugins import `@hermes/plugin-sdk`
and nothing else, so the app can move its internals without breaking them.
The fix is to widen the SDK rather than exempt the plugin — it now exports the
OKLCH colour maths, `useTheme`, `retintTheme`, and the accent override, so any
plugin can derive a palette instead of hardcoding one.
Finding a colour by hex is guesswork; finding one by eye needs a picker that
does not lie about where you will land. HSV crushes the whole blue family
into a narrow band of its hue rail, so dragging "to blue" puts you on pure
sRGB blue, which reads violet — every blue that actually looks blue lives in
a few degrees you cannot reliably hit there.
This one is OKLCH. The hue rail is perceptually even and previews the
current colour at every hue rather than showing a generic rainbow, and the
field is a canvas drawn per-pixel through the real conversion, so its curved
edge is the true sRGB gamut boundary — every pixel is a colour the display
can show. Dragging repaints the whole app against the real derivation.
It ships off (`defaultEnabled: false`) and holds no persisted state: the
override clears on dispose, so turning the plugin off returns every surface
to the authored theme rather than stranding a colour with no control to
clear it. The retint itself stays in core, where Appearance settings and the
command palette can reach it.