feat: complete photo gallery implementation with album management and lightbox viewer

- Added photo gallery carousel view (gallery.php) with all member albums
- Implemented album detail view with responsive photo grid and lightbox
- Created album creation/editing form with drag-and-drop photo uploads
- Added backend processors for album CRUD operations and photo management
- Implemented API endpoints for fetching and deleting photos
- Added database migration for photo_albums and photos tables
- Included comprehensive feature documentation with testing checklist
- Updated .htaccess with URL rewrite rules for gallery routes
- Added Gallery link to Members Area menu in header
- Created upload directory structure (/assets/uploads/gallery/)
- Implemented security: CSRF tokens, ownership verification, file validation
- Added transaction safety with rollback on errors and cleanup
- Features: Lightbox with keyboard navigation, drag-and-drop uploads, responsive design

src/processors/get_album_photos.php

@@ -0,0 +1,59 @@
+<?php
+session_start();
+
+if (!isset($_SESSION['user_id'])) {
+    http_response_code(403);
+    exit(json_encode(['error' => 'Unauthorized']));
+}
+
+$rootPath = dirname(dirname(dirname(__DIR__)));
+require_once($rootPath . '/connection.php');
+
+$album_id = intval($_GET['id'] ?? 0);
+
+if (!$album_id) {
+    http_response_code(400);
+    exit(json_encode(['error' => 'Album ID is required']));
+}
+
+$conn = openDatabaseConnection();
+
+// Verify album exists and user has access
+$albumCheck = $conn->prepare("SELECT user_id FROM photo_albums WHERE album_id = ?");
+$albumCheck->bind_param("i", $album_id);
+$albumCheck->execute();
+$albumResult = $albumCheck->get_result();
+
+if ($albumResult->num_rows === 0) {
+    $conn->close();
+    http_response_code(404);
+    exit(json_encode(['error' => 'Album not found']));
+}
+
+$album = $albumResult->fetch_assoc();
+// Allow viewing own albums or public albums (owner is a member)
+if ($album['user_id'] !== $_SESSION['user_id']) {
+    // For now, only allow owners to edit
+    $conn->close();
+    http_response_code(403);
+    exit(json_encode(['error' => 'Unauthorized']));
+}
+$albumCheck->close();
+
+// Get photos
+$photoStmt = $conn->prepare("SELECT photo_id, file_path, caption, display_order FROM photos WHERE album_id = ? ORDER BY display_order ASC");
+$photoStmt->bind_param("i", $album_id);
+$photoStmt->execute();
+$photoResult = $photoStmt->get_result();
+
+$photos = [];
+while ($photo = $photoResult->fetch_assoc()) {
+    $photos[] = $photo;
+}
+$photoStmt->close();
+
+$conn->close();
+
+header('Content-Type: application/json');
+echo json_encode($photos);
+?>