Complete CreateEventModalV2 integration and fix styling

- Replace CreateEventModal with new modular CreateEventModalV2 throughout app
- Fix compilation errors by aligning event_form types with create_event_modal types
- Add missing props (initial_start_time, initial_end_time) to modal interface
- Fix styling issues: use tab-navigation class and add modal-body wrapper
- Remove duplicate on_create prop causing compilation failure
- All recurrence options now properly positioned below repeat/reminder pickers

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

frontend/src/components/mod.rs

@@ -5,6 +5,7 @@ pub mod calendar_list_item;
 pub mod context_menu;
 pub mod create_calendar_modal;
 pub mod create_event_modal;
+pub mod create_event_modal_v2;
 pub mod event_context_menu;
 pub mod event_form;
 pub mod event_modal;
@@ -24,6 +25,11 @@ pub use create_calendar_modal::CreateCalendarModal;
 pub use create_event_modal::{
     CreateEventModal, EventClass, EventCreationData, EventStatus, RecurrenceType, ReminderType,
 };
+pub use create_event_modal_v2::CreateEventModalV2;
+pub use event_form::{
+    EventClass as EventFormClass, EventCreationData as EventFormData, EventStatus as EventFormStatus, 
+    RecurrenceType as EventFormRecurrenceType, ReminderType as EventFormReminderType,
+};
 pub use event_context_menu::{DeleteAction, EditAction, EventContextMenu};
 pub use event_modal::EventModal;
 pub use login::Login;