- Fix sidebar positioning (end-0 → start-0) so it appears on the RIGHT in RTL
- Fix main content margin (me-64 → ms-64) to offset sidebar correctly
- Fix TrainingProgram queries using non-existent is_active column → status
- Fix User queries using is_active → status
- Fix invoice type 'invoice' → 'standard' to match CHECK constraint
- Fix CollectPaymentWizard using balance_due → due_amount + billable morphs
- Fix notification template Blade parse error (unclosed parenthesis)
- Align 10+ sidebar permission checks with actual route middleware permissions
- Add missing permissions to seeder (pos.sell, inventory.list, reports.view, etc.)
- Add comprehensive global error handler with full stack trace, SQL log, request data
- Add Arabic error pages (500, 403, 404) with detailed debugging info
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>