Add comprehensive social media management system and improve admin pages

## Social Media Management System
- Add SocialMediaLink database model with platform, URL, icon, and ordering
- Create complete CRUD API endpoints for admin social media management
- Implement admin social media management page with Material-UI DataGrid
- Add "Social Media" menu item to admin navigation
- Update footer to dynamically load and display enabled social media links
- Support multiple platforms: Facebook, Twitter, Instagram, YouTube, LinkedIn, GitHub, TikTok
- Include proper icon mapping and fallback handling

## Admin Pages Improvements
- Replace broken TinyMCE editor with working WYSIWYG rich text editor
- Create SimpleRichEditor component with toolbar for formatting
- Fix admin authentication to use cookies instead of localStorage tokens
- Update all admin API calls to use credentials: 'include'
- Increase content editor height to 800px for better editing experience
- Add Lexical editor component as alternative (not currently used)

## Footer Pages System
- Create 8 comprehensive footer pages: About, Blog, Support, API Docs, Terms, Privacy, Cookies, GDPR
- Implement dynamic footer link management with smart categorization
- Separate Quick Links and Legal sections with automatic filtering
- Remove duplicate hardcoded links and use database-driven system
- All footer pages are fully written with professional content

## Database & Dependencies
- Add uuid package for ID generation
- Update Prisma schema with new SocialMediaLink model and relations
- Seed default social media links for Facebook, Twitter, Instagram, YouTube
- Add Lexical rich text editor packages (@lexical/react, etc.)

## Technical Improvements
- Fix async params compatibility for Next.js 15
- Update MUI DataGrid deprecated props
- Improve admin layout navigation structure
- Add proper TypeScript interfaces for all new components
- Implement proper error handling and user feedback

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

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

app/api/social-media/route.ts

@@ -0,0 +1,30 @@
+import { NextRequest, NextResponse } from 'next/server';
+import { prisma } from '@/lib/db';
+
+export async function GET(request: NextRequest) {
+  try {
+    const socialMediaLinks = await prisma.socialMediaLink.findMany({
+      where: { isEnabled: true },
+      orderBy: { order: 'asc' },
+      select: {
+        id: true,
+        platform: true,
+        name: true,
+        url: true,
+        icon: true,
+        order: true
+      }
+    });
+
+    return NextResponse.json({
+      success: true,
+      data: socialMediaLinks
+    });
+  } catch (error) {
+    console.error('Error fetching social media links:', error);
+    return NextResponse.json(
+      { success: false, error: 'Failed to fetch social media links' },
+      { status: 500 }
+    );
+  }
+}