- Add GET/PUT/DELETE /api/categories/:id/overrides endpoints with
privilege escalation guard matching existing channel override pattern
- Add isCategoryPrivate() and broadcastCategoryOverrideChange() helpers
that cascade visibility changes to all channels in a category
- Fix PATCH /api/channels/:id to recompute permissions via
broadcastOverrideChange when categoryId changes (different category
overrides may apply)
- Include isPrivate flag on categories in GET /api/spaces/:id payload
using batch-fetched @everyone overrides
- Include isPrivate on categories in broadcastChannelLayout and
PATCH /api/categories/:id broadcasts
Jannis Braun
637e083e9a