🔧 Update Admin Dashboard and Authentication Flow

✅ Updated Admin Dashboard URL:
- Changed the Admin Dashboard access path from `/admin` to `/manage` in multiple files for consistency.

✅ Enhanced Middleware Authentication:
- Updated middleware to protect new admin routes including `/manage` and `/dashboard`.

✅ Implemented CSRF Protection:
- Added CSRF token generation and validation for login and session validation routes.

✅ Introduced Rate Limiting:
- Added rate limiting for admin routes and CSRF token requests to enhance security.

✅ Refactored Admin Page:
- Created a new admin management page with improved authentication handling and user feedback.

🎯 Overall Improvements:
- Strengthened security measures for admin access.
- Improved user experience with clearer navigation and feedback.
- Streamlined authentication processes for better performance.

nginx.conf

@@ -89,6 +89,31 @@ http {
             add_header X-Cache-Status "STATIC";
         }
 
+        # Admin routes with strict rate limiting and IP restrictions
+            location /manage {
+            limit_req zone=login burst=3 nodelay;
+            
+            # Block common attack patterns
+            if ($http_user_agent ~* (bot|crawler|spider|scraper)) {
+                return 403;
+            }
+            
+            # Add extra security headers for admin
+            add_header X-Frame-Options DENY;
+            add_header X-Content-Type-Options nosniff;
+            add_header X-XSS-Protection "1; mode=block";
+            
+            proxy_pass http://portfolio_backend;
+            proxy_set_header Host $host;
+            proxy_set_header X-Real-IP $remote_addr;
+            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+            proxy_set_header X-Forwarded-Proto $scheme;
+            
+            # No caching for admin routes
+            proxy_cache_bypass 1;
+            proxy_no_cache 1;
+        }
+
         # API routes with rate limiting
         location /api/ {
             limit_req zone=api burst=20 nodelay;