Revert "remove unnecessary shit"

This reverts commit 3623d8b265.

files/assets/js/chat.js

@@ -351,9 +351,16 @@ document.addEventListener('click', function (e) {
 
 
 const input = document.getElementById('file')
+function handle_files() {
+	if (!input.files.length) return
+	input.previousElementSibling.textContent = input.files[0].name.substr(0, 50);
+}
+
+input.onchange = handle_files
 
 document.onpaste = function(event) {
 	input.files = structuredClone(event.clipboardData.files);
+	handle_files()
 }
 
 box.scrollTo(0, box.scrollHeight)