Adds four fully-designed visual themes for the public status page
(refined | modern | bold | editorial) with a light/dark mode selector,
admin preview in a mock browser frame, and a shared theme provider
that keeps the component tree unified while letting each theme own
its visual identity.
## Selectable themes
- Refined — clean, flat cards, soft shadows, colored status dot.
- Modern — flat surfaces with a pulsing status dot and staggered
fade-in cards.
- Bold — conic-gradient logo, 34px hero title with a check disc,
subtle dual-radial glow on dark mode, accent-green hover border.
- Editorial — serif headings, narrow newspaper column, 'Service
Report' eyebrow + title, flat rectangular badges and dateline.
## Architecture
- Single `StatusPageThemeProvider` hosts CSS custom-property tokens
per theme and resolves light/dark based on admin-forced mode,
falling back to `prefers-color-scheme` with a matchMedia listener.
- Each theme owns only its `*StatusPage.tsx` + scoped CSS file.
The heatmap, histogram, and infrastructure renderers are shared
across all four themes (parameterized by a `classPrefix`) to avoid
the 12-file duplication the initial draft had.
- Renderer lookup table in `Status/index.tsx` replaces a 4-way
ternary chain; unknown themes fall through to the legacy renderer.
- `resolveOverallStatus`, `statusBadgeKey`, `monoFirstChar`, and
`monitorBadgeTone` are extracted to `themes/shared/overallStatus.tsx`.
## Admin UX
- `ThemePicker` uses the project's `RadioWithDescription` and
`Select` components — one radio card per theme plus an Auto/
Light-only/Dark-only mode dropdown.
- `BrowserFrame` wraps the preview in the admin panel with a mock
chrome (traffic lights + URL bar) that adopts the status page's
theme tokens. Edge-to-edge fill with no gray bleed.
- Public route renders the theme directly on the viewport with the
document body painted to the theme background, reverted on unmount.
## Performance & polish
- Histogram's derived stats (padded array, max, avg, peak) are
memoized on `checks`; `max` is reused for `peak` instead of
computing twice.
- Editorial's dateline is wrapped in `useMemo` so the 10s poll
doesn't rerender "April 23, 2026" as a changing string.
- Provider's `setSystemMode` reconciliation uses the updater form
to avoid an extra render when the value is unchanged.
- `monoFirstChar` no longer uses a non-null assertion.
## Form plumbing
- `useStatusPageForm` defaults include `theme` + `themeMode`.
- `Validation/statusPage.ts` accepts both as optional zod enums.
- `Pages/StatusPage/Create/index.tsx` appends both to FormData on
create and update.
## CLAUDE.md
- Dev port note: local client runs on 10001 (5173 is used by a
different local project); server `CLIENT_HOST` is set to match.
gorkem-bwl
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