fix: remove all dark mode styles from shared UI components

Stripped dark: classes from Input, Textarea, Button, and InputField
components. These were causing black/dark backgrounds in modals and
forms across all apps (backoffice, gacha, dimentorin, etc).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

libs/ui/src/atoms/button/button.tsx

@@ -14,13 +14,13 @@ export const buttonVariants = cva(
       variant: {
         primary: 'bg-primary-500 hover:bg-primary-600 text-white shadow-md',
         secondary:
-          'bg-white dark:bg-gray-800 hover:text-primary-600 dark:hover:text-primary-400 hover:bg-gray-50 dark:hover:bg-gray-700 text-primary-500 dark:text-primary-400 shadow-md dark:shadow-gray-900/50 border dark:border-gray-700',
-        text: 'bg-transparent hover:text-primary-600 dark:hover:text-primary-400 hover:bg-gray-50 dark:hover:bg-gray-800 text-primary-500 dark:text-primary-400',
+          'bg-white hover:text-primary-600 hover:bg-gray-50 text-primary-500 shadow-md border',
+        text: 'bg-transparent hover:text-primary-600 hover:bg-gray-50 text-primary-500',
         bordered:
-          'border border-primary-500 dark:border-primary-400 hover:border-primary-600 dark:hover:border-primary-300 bg-transparent hover:text-primary-600 dark:hover:text-primary-300 hover:bg-gray-50 dark:hover:bg-gray-800 text-primary-500 dark:text-primary-400',
+          'border border-primary-500 hover:border-primary-600 bg-transparent hover:text-primary-600 hover:bg-gray-50 text-primary-500',
         success: 'bg-success-500 hover:bg-success-600 text-white shadow-md',
         danger:
-          'bg-danger-100 dark:bg-danger-500/20 hover:bg-danger-200 dark:hover:bg-danger-500/30 text-danger-500 shadow-md dark:shadow-gray-900/50',
+          'bg-danger-100 hover:bg-danger-200 text-danger-500 shadow-md',
       },
       size: {
         sm: 'text-[12px] max-h-[36px]',

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

@@ -58,7 +58,7 @@ export const Input: FC<TInputProps> = ({
   };
 
   const mergedClassName = cn(
-    `px-[12px] py-[8px] text-neutral-800 dark:text-white bg-white dark:bg-gray-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 ${
+    `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 ${
       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 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-gray-800 text-neutral-800 dark:text-white placeholder:text-neutral-300 dark:placeholder:text-neutral-500 invalid:border-danger-500 invalid:text-danger-500',
+    'rounded-md border border-neutral-200 hover:border-blue-300 focus:outline-1 focus:outline-blue-500 px-[12px] py-[8px] bg-white text-neutral-800 placeholder:text-neutral-300 invalid:border-danger-500 invalid:text-danger-500',
     sizeClasses[size],
     disabled && disabledClass,
     error && errorClass,

libs/ui/src/molecules/input-field/input-field.tsx

@@ -56,7 +56,7 @@ export const InputField: FC<TInputFieldProps> = ({
       <label
         htmlFor={htmlFor}
         className={cn(
-          'items-start justify-item-start text-start text-neutral-800! dark:text-neutral-300!',
+          'items-start justify-item-start text-start text-neutral-800!',
           sizeClasses[size].label
         )}
       >