Use String.replaceAll() instead of String.replace() with /g flag (S7781)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/views/Upload/UploadPage.vue

@@ -325,7 +325,7 @@ function onInput(e) {
  */
 function getTextWidth(text, e) {
   // Replace spaces with non-breaking spaces
-  const processedText = text.replace(/ /g, "\u00a0");
+  const processedText = text.replaceAll(" ", "\u00a0");
   const hiddenSpan = document.createElement("span");
 
   hiddenSpan.textContent = processedText;