Fixed a lot of responsive problems.

- Fixed auth problem
- Fixed BBCode and Markdown apparition in some unnecessary parts

resources/js/mobile-back-to-top.js

@@ -0,0 +1,18 @@
+export function initMobileBackToTop(){
+    const backToTopButton = document.querySelector('.back-to-top');
+    const content = document.getElementById('content');
+
+    if (!backToTopButton || !content) {
+        return;
+    }
+
+    const toggleBackToTop = () => {
+        const shouldShow = window.innerWidth <= 768 && content.scrollTop > 320;
+
+        backToTopButton.classList.toggle('visible', shouldShow);
+    };
+
+    toggleBackToTop();
+    content.addEventListener('scroll', toggleBackToTop, { passive: true });
+    window.addEventListener('resize', toggleBackToTop, { passive: true });
+}