Revert "✨feat: Support TailwindCSS V3"

This reverts commit 74572ab2ee.

web/vite.config.js

@@ -20,26 +20,6 @@ export default defineConfig({
       },
     },
     react(),
-    {
-      name: 'semi-css-layer',
-      transformIndexHtml(html) {
-        // Add layer to Semi CSS by prepending style tag
-        return html.replace(
-          /<\/head>/,
-          `<style>@layer tailwind-base,semi,tailwind-components,tailwind-utils;</style></head>`
-        );
-      },
-      transform(code, id) {
-        if (id.includes('@douyinfe/semi-ui') && id.endsWith('.css')) {
-          // Wrap Semi CSS in a layer
-          return {
-            code: `@layer semi { ${code} }`,
-            map: null
-          };
-        }
-        return null;
-      }
-    }
   ],
   optimizeDeps: {
     force: true,