Refactor event modal into standalone component

- Created dedicated EventModal component in src/components/event_modal.rs
- Extracted modal logic and styling from calendar component for better separation
- Updated data flow to pass full CalendarEvent objects instead of strings
- Added PartialEq derive to CalendarEvent for component props
- Updated service layer to group events by CalendarEvent objects
- Enhanced event click handling to show detailed event information
- Modal displays title, description, location, start/end times, and status
- Maintained existing modal styling and user interaction patterns

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

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

src/services/calendar_service.rs

@@ -5,7 +5,7 @@ use wasm_bindgen_futures::JsFuture;
 use web_sys::{Request, RequestInit, RequestMode, Response};
 use std::collections::HashMap;
 
-#[derive(Debug, Clone, Serialize, Deserialize)]
+#[derive(Debug, Clone, Serialize, Deserialize, PartialEq)]
 pub struct CalendarEvent {
     pub uid: String,
     pub summary: Option<String>,
@@ -91,16 +91,15 @@ impl CalendarService {
     }
 
     /// Convert events to a HashMap grouped by date for calendar display
-    pub fn group_events_by_date(events: Vec<CalendarEvent>) -> HashMap<NaiveDate, Vec<String>> {
+    pub fn group_events_by_date(events: Vec<CalendarEvent>) -> HashMap<NaiveDate, Vec<CalendarEvent>> {
         let mut grouped = HashMap::new();
         
         for event in events {
             let date = event.get_date();
-            let title = event.get_title();
             
             grouped.entry(date)
                 .or_insert_with(Vec::new)
-                .push(title);
+                .push(event);
         }
         
         grouped