## Changes
- Add `theme` (refined | modern | bold | editorial, default "refined") and
`themeMode` (auto | light | dark, default "auto") fields to the StatusPage
Mongoose model and the shared `StatusPage` type.
- Extend the create/update Zod validator to accept both fields optionally.
- Map both fields in the repository's `toEntity` so GET responses include them.
- Document both fields in the create and update endpoints in `openapi.json`.
- Add `STATUS_PAGE_THEMES_ENABLED` env var (default `true`) wired through
`SettingsService` for ops-level rollback. When disabled, the controller
strips theme fields on write and forces defaults on read.
## Notes
- No migration needed; Mongoose applies defaults for legacy documents.
- Controller short-circuits to zero-cost when the feature flag is on.
- `DEFAULT_STATUS_PAGE_THEME` / `DEFAULT_STATUS_PAGE_THEME_MODE` constants
exported so the frontend PR can consume the same values.
Alex Holliday
gorkem-bwl