feat: add class modal with descriptions, photos and remove email from contacts

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/types/content.ts

@@ -2,6 +2,8 @@ export interface ClassItem {
   name: string;
   description: string;
   icon: string;
+  detailedDescription?: string;
+  images?: string[];
 }
 
 export interface TeamMember {
@@ -16,7 +18,6 @@ export interface ContactInfo {
   title: string;
   addresses: string[];
   phone: string;
-  email: string;
   instagram: string;
   mapEmbedUrl: string;
   workingHours: string;