1. Owner tracking (createdBy):
- Add createdBy field to locations schema
- Set createdBy to userId on location creation
- Only owners can edit/delete their own locations
- Seed/unowned locations remain editable by anyone
2. Edit/Delete UI:
- Edit button + full edit form at /locations/:id/edit
- Delete button with confirmation dialog on detail page
- Both only visible to the location owner
- ForbiddenException (403) if non-owner tries to modify
3. Pagination:
- Backend returns paginated results (page, limit, total, totalPages)
- Frontend "Load more" button for infinite scroll
- Category filter reloads from API with server-side filtering
- Default 20 items per page, max 100
Tests updated: 36 tests passing (5 new for ownership + pagination).
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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