fix(ui): add dark mode support to Input, Textarea and profile modal

- Add dark mode styling to Input component (bg, text, border, placeholder)
- Add dark mode styling to Textarea component
- Update profile page with blurred backdrop overlay
- Add shadow and proper dark mode to modal container

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

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

apps/hackathon/src/app/profile/page.tsx

@@ -128,8 +128,8 @@ const ProfilePage: FC = (): ReactElement => {
   const isLoading = isUpdating || isUploading;
 
   return (
-    <div className="flex flex-col justify-center items-center min-h-screen bg-gray-50 dark:bg-neutral-950 px-4 py-8">
-      <div className="bg-white dark:bg-neutral-900 w-full max-w-md p-8 rounded-xl shadow-lg">
+    <div className="fixed inset-0 bg-black/30 dark:bg-black/50 backdrop-blur-sm flex flex-col justify-center items-center px-4 py-8 z-50 overflow-y-auto">
+      <div className="bg-white dark:bg-neutral-900 w-full max-w-md p-8 rounded-xl shadow-xl dark:shadow-neutral-950/50">
         <div className="mb-6">
           <div className="flex items-center justify-between mb-2">
             <h1 className="text-2xl font-bold text-gray-900 dark:text-white">Edit Profile</h1>

libs/ui/src/atoms/input/input.tsx

@@ -56,7 +56,7 @@ export const Input: FC<TInputProps> = ({
   };
 
   const mergedClassName = cn(
-    `px-[12px] py-[8px] text-neutral-800 bg-white placeholder:text-neutral-300 border border-neutral-200 hover:border-blue-300 focus:outline-1 focus:outline-blue-500 rounded-md font-bai-jamjuree w-full ${
+    `px-[12px] py-[8px] text-neutral-800 dark:text-white bg-white dark:bg-neutral-800 placeholder:text-neutral-300 dark:placeholder:text-neutral-500 border border-neutral-200 dark:border-neutral-600 hover:border-blue-300 dark:hover:border-blue-500 focus:outline-1 focus:outline-blue-500 dark:focus:outline-primary-500 rounded-md font-bai-jamjuree w-full ${
       widthform === 'standard' ? 'min-w-70' : ''
     }`,
     sizeClasses[size].textSize,

libs/ui/src/atoms/textarea/textarea.tsx

@@ -38,7 +38,7 @@ export const Textarea: FC<TTextareaProps> = ({
   ...rest
 }): ReactElement => {
   const mergedClassName = cn(
-    'rounded-md border border-neutral-200 hover:border-blue-300 focus:outline-1 focus:outline-blue-500 px-[12px] py-[8px] invalid:border-danger-500 invalid:text-danger-500',
+    'rounded-md border border-neutral-200 dark:border-neutral-600 hover:border-blue-300 dark:hover:border-blue-500 focus:outline-1 focus:outline-blue-500 dark:focus:outline-primary-500 px-[12px] py-[8px] bg-white dark:bg-neutral-800 text-neutral-800 dark:text-white placeholder:text-neutral-300 dark:placeholder:text-neutral-500 invalid:border-danger-500 invalid:text-danger-500',
     sizeClasses[size],
     disabled && disabledClass,
     error && errorClass,