Improve UX with navigation, attendance management, and calendar fixes

## Quick Wins
- **AdminSidebar**: Move "View Public Site" to clickable logo area
- **Plans**: Fix layout to center single plan, dynamic grid for multiple
- **AdminGallery**: Add empty state message with "Create Event" button

## Event Attendance Enhancement
- **NEW: AdminEventAttendance page** with full-featured table view:
  - Tab filters (All/Yes/No/Maybe RSVPs)
  - Search by name/email
  - Bulk selection with Select All
  - Individual attendance toggle buttons (merged column)
  - CSV export functionality (client requirement)
  - Summary statistics cards
- **AdminEvents**: Navigate to new attendance page instead of dialog
- **App.js**: Add /admin/events/:eventId/attendance route

## Calendar Fixes
- **MemberCalendar**: Add state management for navigation (date/view)
  - Fix non-functional buttons (Today/Back/Next/Month/Week/Day/Agenda)
  - Add onNavigate and onView handlers
- **NEW: MemberCalendar.css**: Extract styles from broken jsx syntax
  - Fix toolbar button styling and interactivity

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

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

src/pages/admin/AdminGallery.js

@@ -1,4 +1,5 @@
 import React, { useState, useEffect, useRef } from 'react';
+import { Link } from 'react-router-dom';
 import api from '../../utils/api';
 import { Card } from '../../components/ui/card';
 import { Button } from '../../components/ui/button';
@@ -14,7 +15,7 @@ import {
   SelectValue,
 } from '../../components/ui/select';
 import { Dialog, DialogContent, DialogHeader, DialogTitle, DialogFooter } from '../../components/ui/dialog';
-import { Upload, Trash2, Edit, X, ImageIcon, Calendar, MapPin } from 'lucide-react';
+import { Upload, Trash2, Edit, X, ImageIcon, Calendar, MapPin, AlertCircle } from 'lucide-react';
 import { toast } from 'sonner';
 import moment from 'moment';
 
@@ -179,6 +180,32 @@ const AdminGallery = () => {
             </Select>
           </div>
 
+          {/* Empty State Message */}
+          {events.length === 0 && (
+            <div className="mt-4 p-4 bg-[#f1eef9] border-2 border-[#DDD8EB] rounded-xl">
+              <div className="flex items-start gap-3">
+                <AlertCircle className="h-5 w-5 text-[#664fa3] flex-shrink-0 mt-0.5" />
+                <div className="flex-1">
+                  <h4 className="text-sm font-semibold text-[#422268] mb-1" style={{ fontFamily: "'Inter', sans-serif" }}>
+                    No Events Available
+                  </h4>
+                  <p className="text-sm text-[#664fa3] mb-3" style={{ fontFamily: "'Nunito Sans', sans-serif" }}>
+                    You need to create an event before uploading gallery images. Events help organize photos by occasion.
+                  </p>
+                  <Link to="/admin/events">
+                    <Button
+                      className="bg-[#664fa3] hover:bg-[#422268] text-white rounded-xl text-sm"
+                      style={{ fontFamily: "'Inter', sans-serif" }}
+                    >
+                      <Calendar className="h-4 w-4 mr-2" />
+                      Create Your First Event
+                    </Button>
+                  </Link>
+                </div>
+              </div>
+            </div>
+          )}
+
           {selectedEvent && (
             <div className="pt-4">
               <input