BookingWP - #1 WordPress Appointment Booking Plugin v5.1.2

* Feature       - Admin calendar toast notifications: Real-time updates when appointments are created, updated, cancelled, or rescheduled via SSE.
* Improvement   - Customer contact icons in appointment modal: Email and phone icons appear on hover with click-to-action (mailto/tel).
* Improvement   - Appointment needs to use staff_ids as single source of truth, added comprehensive checks to ensure this.
* Improvement   - Guest appointment that leaves name/surname should display it in admin calendar even if not registered.
* Improvement   - Update all translations.
* Improvement   - Show Guest name in Calendar view + change default calendar view. Issue #1271.
* Improvement   - Appointment modal has all content filterable through React/JS.
* Improvement   - Ensure plugin installation does not happen too early and everything hooks after 'init' call to avoid potential issues.
* Improvement   - Deposits with one full and one part payment appointment in the same order. Issue #1270.
* Fix           - Resolved double notification issue when cancelling appointments by improving SSE event deduplication.
* Fix           - SSE not updating admin calendar for appointments created via shortcode checkout (deduplication was blocking status change events in same request).
* Fix           - Fix NL translation.
* Fix           - Staff 2-way sync doesn't work fine with multiple calendars sync (staff + global). Issue #1268.
* Fix           - Sync issue: when parent recurring event was deleted, modified instance availability rules remained orphaned. Issue #1216.