Update PageHeader component to conditionally hide BackButton based on environment and TMA status

- Modified the logic in the PageHeader component to hide the BackButton when in production or when the TMA status is 'simple', improving user experience by reducing unnecessary navigation options.

apps/web/components/navigation/header/index.tsx

@@ -1,4 +1,5 @@
 'use client';
+
 import { BackButton } from './back-button';
 import { cn } from '@repo/ui/lib/utils';
 import { isTMA } from '@telegram-apps/sdk-react';
@@ -6,16 +7,16 @@ import { isTMA } from '@telegram-apps/sdk-react';
 type Props = { title: string | undefined };
 
 export function PageHeader(props: Readonly<Props>) {
-  const isTG = isTMA('simple');
+  const hideBackButton = process.env.NODE_ENV === 'production' || isTMA('simple');
 
   return (
     <div
       className={cn(
         'sticky top-0 z-50 flex h-12 items-center rounded-b-lg bg-transparent font-bold tracking-wide backdrop-blur-md',
-        isTG ? 'px-4' : 'px-2',
+        hideBackButton ? 'px-4' : 'px-2',
       )}
     >
-      {!isTG && <BackButton />}
+      {!hideBackButton && <BackButton />}
       {props.title}
     </div>
   );