fix(ui): stop the add-provider modal from shifting while it loads (#13179)

ui/styles/globals.css

@@ -717,18 +717,7 @@
 
 /* ===== UTILITY LAYER ===== */
 @layer utilities {
-  /* Screen reader only - visually hidden but accessible */
-  .sr-only {
-    position: absolute;
-    width: 1px;
-    height: 1px;
-    padding: 0;
-    margin: -1px;
-    overflow: hidden;
-    clip: rect(0, 0, 0, 0);
-    white-space: nowrap;
-    border-width: 0;
-  }
+  /* No .sr-only here: Tailwind ships it, and a copy would beat lg:not-sr-only. */
 
   /* Hide scrollbar */
   .no-scrollbar {