Split the bloated date libs to a separate module that rarely changes, speeding up page loads when the app itself has changed.

vite.config.js

@@ -15,4 +15,18 @@ export default defineConfig({
       '@': fileURLToPath(new URL('./src', import.meta.url))
     },
   },
+  build: {
+    chunkSizeWarningLimit: 1500,
+    rollupOptions: {
+      output: {
+        manualChunks: (id) => {
+          if (id.includes('node_modules/date-fns') || 
+              id.includes('node_modules/date-fns-tz') || 
+              id.includes('node_modules/date-holidays')) {
+            return 'vendor-date-libs';
+          }
+        }
+      }
+    }
+  }
 })