Browse + install color themes from the VS Code Marketplace straight from
Cmd-K and Settings → Appearance. The Electron main process resolves the
extension, unzips the .vsix with a hand-rolled zip reader (zlib only, no
new deps), and hands back the raw theme JSON; the renderer converts it to
a DesktopTheme with a small seed → color-mix mapping.
- Folds an extension's light + dark variants into one theme family, so the
light/dark toggle switches Solarized/GitHub variants and installing in
dark mode stays dark.
- Guarantees accent contrast (WCAG AA) so imported sidebar labels read
instead of vanishing into the surface.
- Filters icon/product-icon packs out of the Themes-category search.
- "Install theme…" lives atop the Cmd-K theme picker; imports fold into
the Light/Dark groups by the modes they support.
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