tailwind.config.js — Added corePlugins: { preflight: false } to disable Tailwind's Preflight reset. Preflight forces svg { display: block } which breaks MUI Joy's inline icon layout inside <Select>, <Autocomplete>, etc., making the icon area unclickable. Since MUI Joy's <CssBaseline /> already provides a CSS reset, Preflight was redundant.
index.css — Removed the global button, a, [role="button"] { transform: translateZ(0); backface-visibility: hidden; } rule. This was creating new stacking contexts on every button element, which interfered with MUI Joy's internal pseudo-element overlays used for click-target expansion.
