Add authentication, user management, and database migration features

- Implement OAuth 2.0 and PAT authentication methods
- Add user management, roles, and profile functionality
- Add database migrations and admin user scripts
- Update services for authentication and user settings
- Add protected routes and permission hooks
- Update documentation for authentication and database access

frontend/src/index.css

@@ -8,6 +8,33 @@
   }
 }
 
+@keyframes blob {
+  0% {
+    transform: translate(0px, 0px) scale(1);
+  }
+  33% {
+    transform: translate(30px, -50px) scale(1.1);
+  }
+  66% {
+    transform: translate(-20px, 20px) scale(0.9);
+  }
+  100% {
+    transform: translate(0px, 0px) scale(1);
+  }
+}
+
+.animate-blob {
+  animation: blob 7s infinite;
+}
+
+.animation-delay-2000 {
+  animation-delay: 2s;
+}
+
+.animation-delay-4000 {
+  animation-delay: 4s;
+}
+
 @layer components {
   .btn {
     @apply inline-flex items-center justify-center px-4 py-2 text-sm font-medium rounded-md transition-colors focus:outline-none focus:ring-2 focus:ring-offset-2 disabled:opacity-50 disabled:cursor-not-allowed;
@@ -112,4 +139,13 @@
   .badge-lighter-blue {
     @apply bg-blue-300 text-white;
   }
+
+  .scrollbar-hide {
+    -ms-overflow-style: none;
+    scrollbar-width: none;
+  }
+
+  .scrollbar-hide::-webkit-scrollbar {
+    display: none;
+  }
 }