Sibling sweep to dc2becf: NaturalDateInput.vue and ImageUpload.vue used
candlelight-/ember-/guild-* utility classes that aren't defined in the
project's Tailwind palette and rendered as no-ops. Swapped to inline
styles using --candle, --ember, --text-dim/faint/bright, --border,
--input-bg, --surface. Drag-state and parsed-date notices follow the
color-mix(... 15%) + 1px solid pattern from dc2becf.
Migrate the entire admin section from the dark guild-* Tailwind theme
to the zine design system (dashed borders, CSS custom properties,
Brygada 1918 + Commit Mono, cream/dark mode palette).
- Replace admin top-nav layout with sidebar matching default layout
- Reskin dashboard, members, events, series management pages
- Reskin events/create and series/create form pages
- Add dev-only test login endpoint (GET /api/dev/test-login)
- Redirect duplicate admin/dashboard.vue to /admin
- Update CLAUDE.md design system docs
Standardizes color values and styling using the new tokens:
- Replaces hardcoded colors with semantic variables
- Updates background/text/border classes for light/dark mode
- Migrates inputs to UInput/USelect/UTextarea components
- Removes redundant style declarations
