Implement calendar display with multi-day event support

- Added timezone support (Pacific/Auckland) for calendar events
- Implemented recurring event handling using recurring_ical_events library
- Created horizontal 5-day column layout for calendar display
- Fixed multi-day event rendering to show events across all active days
- Updated calendar to show next 5 days (today + 4)
- Reduced font sizes and padding for compact display
- Changed image rotation interval to 60 seconds
- Added pytz and recurring_ical_events dependencies

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

static/js/app.js

@@ -114,26 +114,97 @@ async function updateCalendar() {
             return;
         }
 
+        // Group events by day
+        const eventsByDay = {};
+        const today = new Date();
+        today.setHours(0, 0, 0, 0);
+
+        // Create 5 days (today + 4 more)
+        for (let i = 0; i < 5; i++) {
+            const date = new Date(today);
+            date.setDate(today.getDate() + i);
+            const dateKey = date.toISOString().split('T')[0];
+            eventsByDay[dateKey] = {
+                date: date,
+                events: []
+            };
+        }
+
+        // Group events by their date (including multi-day events)
+        events.forEach(event => {
+            const eventStart = new Date(event.start);
+            const eventEnd = new Date(event.end);
+            eventStart.setHours(0, 0, 0, 0);
+            eventEnd.setHours(0, 0, 0, 0);
+
+            // Check each day in our 5-day view
+            Object.keys(eventsByDay).forEach(dateKey => {
+                const dayDate = new Date(eventsByDay[dateKey].date);
+                dayDate.setHours(0, 0, 0, 0);
+
+                // Include event if this day falls within the event's duration
+                if (dayDate >= eventStart && dayDate <= eventEnd) {
+                    eventsByDay[dateKey].events.push(event);
+                }
+            });
+        });
+
+        // Render events grouped by day
         eventsContainer.innerHTML = '';
 
-        events.forEach(event => {
-            const eventElement = document.createElement('div');
-            eventElement.className = 'event';
+        Object.keys(eventsByDay).sort().forEach(dateKey => {
+            const dayData = eventsByDay[dateKey];
+            const dayElement = document.createElement('div');
+            dayElement.className = 'day-group';
 
-            const startTime = new Date(event.start);
-            const endTime = new Date(event.end);
+            // Format day header
+            const dayDate = dayData.date;
+            const isToday = dayDate.toDateString() === new Date().toDateString();
+            const dayName = isToday ? 'Today' : dayDate.toLocaleDateString('en-NZ', { weekday: 'long' });
+            const dateStr = dayDate.toLocaleDateString('en-NZ', { day: 'numeric', month: 'short' });
 
-            // Format time
-            const timeOptions = { hour: '2-digit', minute: '2-digit', weekday: 'short', day: 'numeric', month: 'short' };
-            const timeString = startTime.toLocaleDateString('en-NZ', timeOptions);
-
-            eventElement.innerHTML = `
-                <div class="event-time">${timeString}</div>
-                <div class="event-title">${event.title}</div>
-                ${event.location ? `<div class="event-location">📍 ${event.location}</div>` : ''}
+            dayElement.innerHTML = `
+                <div class="day-header">
+                    <span class="day-name">${dayName}</span>
+                    <span class="day-date">${dateStr}</span>
+                </div>
+                <div class="day-events"></div>
             `;
 
-            eventsContainer.appendChild(eventElement);
+            const dayEventsContainer = dayElement.querySelector('.day-events');
+
+            if (dayData.events.length === 0) {
+                dayEventsContainer.innerHTML = '<div class="no-events">No events</div>';
+            } else {
+                dayData.events.forEach(event => {
+                    const eventElement = document.createElement('div');
+                    eventElement.className = 'event';
+
+                    const startTime = new Date(event.start);
+                    const endTime = new Date(event.end);
+
+                    // Check if it's an all-day event (time is 00:00)
+                    const isAllDay = startTime.getHours() === 0 && startTime.getMinutes() === 0
+                                   && endTime.getHours() === 0 && endTime.getMinutes() === 0;
+
+                    let timeString;
+                    if (isAllDay) {
+                        timeString = 'All day';
+                    } else {
+                        timeString = startTime.toLocaleTimeString('en-NZ', { hour: '2-digit', minute: '2-digit' });
+                    }
+
+                    eventElement.innerHTML = `
+                        <div class="event-time">${timeString}</div>
+                        <div class="event-title">${event.title}</div>
+                        ${event.location ? `<div class="event-location">📍 ${event.location}</div>` : ''}
+                    `;
+
+                    dayEventsContainer.appendChild(eventElement);
+                });
+            }
+
+            eventsContainer.appendChild(dayElement);
         });
 
     } catch (error) {