- Settings rail (application-settings-navigation) is now white in light mode
instead of a gray fill; separation comes from the hairline ring + soft lift.
- Mobile slide-over: replace the heavy shadow-modal with a soft left-casting
shadow (scrim handles content dimming, shadcn-style) + rounded-l corners.
- Unify scattered shadow-lg usages onto the shadow-dropdown / shadow-modal
tokens across dropdowns, tooltips, popups and slide-over.
- Light-mode semantic text + tertiary/nav contrast tuning for WCAG AA.
- status-summary: support right-aligned dropdown; use it on the app heading.
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