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/calendar.rs

@@ -1,5 +1,5 @@
 use crate::components::{
-    CalendarHeader, CreateEventModal, EventCreationData, EventModal, MonthView, ViewMode, WeekView,
+    CalendarHeader, CreateEventModalV2, EventCreationData, EventModal, MonthView, ViewMode, WeekView,
 };
 use crate::models::ical::VEvent;
 use crate::services::{calendar_service::UserInfo, CalendarService};
@@ -492,7 +492,7 @@ pub fn Calendar(props: &CalendarProps) -> Html {
             />
 
             // Create event modal
-            <CreateEventModal
+            <CreateEventModalV2
                 is_open={*show_create_modal}
                 selected_date={create_event_data.as_ref().map(|(date, _, _)| *date)}
                 event_to_edit={None}
@@ -521,15 +521,6 @@ pub fn Calendar(props: &CalendarProps) -> Html {
                         }
                     })
                 }}
-                on_update={{
-                    let show_create_modal = show_create_modal.clone();
-                    let create_event_data = create_event_data.clone();
-                    Callback::from(move |(_original_event, _updated_data): (VEvent, EventCreationData)| {
-                        show_create_modal.set(false);
-                        create_event_data.set(None);
-                        // TODO: Handle actual event update
-                    })
-                }}
             />
         </div>
     }