Derive the gem-blue palette with OKLCH tonal and complementary-color
rules while preserving acrylic opacity, blur and surface hierarchy.
Darker focus tokens exposed stacked field rings, fallback outlines and
persistent basemap selection rings. Keep fallback focus styles in the
base layer and use one themed field boundary or inset card stroke.
Preserve keyboard focus, invalid states and native input semantics.
Add browser regression coverage for pointer and keyboard focus, all
basemap presentations, narrow layouts and rendered contrast.
Validation in an isolated checkout: pnpm lint, pnpm typecheck,
pnpm test (393 tests), focused browser suites and pnpm build.
The regression recurred because a floating timeline height was still exported as shared layout space and its z-index exceeded artifacts and notices. Reserve zero layout height and define the timeline below artifact and notification overlays.
Keep ScaleInfo pinned to the map corner and move the centered timeline above collisions, preventing the previous conditional offset from lifting the scale. Remove collapsed Agent rail width reservation and add timeline state transitions.
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