perf: aggressive minification and removal of legal comments for JS/CSS

vite.config.ts

@@ -12,6 +12,8 @@ export default defineConfig({
   build: {
     outDir: 'dist', 
     chunkSizeWarningLimit: 1000,
+    cssMinify: true,
+    minify: 'esbuild',
     rollupOptions: {
       output: {
         manualChunks: {
@@ -21,6 +23,10 @@ export default defineConfig({
       }
     }
   },
+  esbuild: {
+    legalComments: 'none',
+    target: 'esnext',
+  },
   test: {
     globals: true,
     environment: "jsdom",