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Removed 12 standalone sidebar entries that belong under Membership or
Sports Activity. They remain accessible via "related sections" links
on the parent section pages and via direct URL.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

- TKT-003: Fix facility create view accessing array as object ($disc->id → $disc['id'])
- TKT-004: Disable autoTrackAuthor on FacilityUnit model (table lacks updated_by column)
- TKT-004: Fix facility edit view same array-as-object bug
- TKT-005: Add national_id validation in coach registration (reject invalid IDs)
- TKT-006: Skip NID validation for member-type players, auto-fill from member record
- TKT-007: Fix program edit form action URL (/update suffix removed to match route)
- TKT-008: Add season start/end date validation in group store and update
- TKT-009: Catch duplicate schedule entry PDOException gracefully (skip duplicates)
- TKT-010/011: Add "Generate Training Sessions" button+route to group show page
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>