Add comprehensive iCal properties support to event creation modal

Enhanced the create event modal to include all major iCalendar properties:
- Event status (confirmed/tentative/cancelled)
- Privacy classification (public/private/confidential)
- Priority levels (0-9 numeric scale)
- Organizer email field
- Attendees list (comma-separated emails)
- Categories (comma-separated tags)
- Reminder options (none to 1 week before)
- Recurrence patterns (none/daily/weekly/monthly/yearly)

Updated backend to parse and handle all new fields, with proper enum conversion
and comma-separated list parsing. Events now generate complete iCal data with
STATUS, CLASS, PRIORITY, ORGANIZER, ATTENDEE, CATEGORIES, VALARM, and RRULE properties.

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

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

src/app.rs

@@ -2,7 +2,7 @@ use yew::prelude::*;
 use yew_router::prelude::*;
 use gloo_storage::{LocalStorage, Storage};
 use web_sys::MouseEvent;
-use crate::components::{Sidebar, CreateCalendarModal, ContextMenu, EventContextMenu, CalendarContextMenu, CreateEventModal, EventCreationData, RouteHandler};
+use crate::components::{Sidebar, CreateCalendarModal, ContextMenu, EventContextMenu, CalendarContextMenu, CreateEventModal, EventCreationData, RouteHandler, EventStatus, EventClass, ReminderType, RecurrenceType};
 use crate::services::{CalendarService, calendar_service::{UserInfo, CalendarEvent}};
 use chrono::NaiveDate;
 
@@ -221,6 +221,38 @@ pub fn App() -> Html {
                     let end_date = event_data.end_date.format("%Y-%m-%d").to_string();
                     let end_time = event_data.end_time.format("%H:%M").to_string();
                     
+                    // Convert enums to strings for backend
+                    let status_str = match event_data.status {
+                        EventStatus::Tentative => "tentative",
+                        EventStatus::Cancelled => "cancelled",
+                        _ => "confirmed",
+                    }.to_string();
+                    
+                    let class_str = match event_data.class {
+                        EventClass::Private => "private",
+                        EventClass::Confidential => "confidential",
+                        _ => "public",
+                    }.to_string();
+                    
+                    let reminder_str = match event_data.reminder {
+                        ReminderType::Minutes15 => "15min",
+                        ReminderType::Minutes30 => "30min",
+                        ReminderType::Hour1 => "1hour",
+                        ReminderType::Hours2 => "2hours",
+                        ReminderType::Day1 => "1day",
+                        ReminderType::Days2 => "2days",
+                        ReminderType::Week1 => "1week",
+                        _ => "none",
+                    }.to_string();
+                    
+                    let recurrence_str = match event_data.recurrence {
+                        RecurrenceType::Daily => "daily",
+                        RecurrenceType::Weekly => "weekly",
+                        RecurrenceType::Monthly => "monthly",
+                        RecurrenceType::Yearly => "yearly",
+                        _ => "none",
+                    }.to_string();
+
                     match calendar_service.create_event(
                         &token,
                         &password,
@@ -232,6 +264,14 @@ pub fn App() -> Html {
                         end_time,
                         event_data.location,
                         event_data.all_day,
+                        status_str,
+                        class_str,
+                        event_data.priority,
+                        event_data.organizer,
+                        event_data.attendees,
+                        event_data.categories,
+                        reminder_str,
+                        recurrence_str,
                         None // Let backend use first available calendar
                     ).await {
                         Ok(_) => {