perf: split tldraw/MUI/supabase into separate vendor chunks

vite.config.ts

@@ -117,6 +117,15 @@ export default defineConfig(({ mode }) => {
     build: {
       outDir: 'dist',
       sourcemap: mode === 'development',
+      rollupOptions: {
+        output: {
+          manualChunks: {
+            'vendor-tldraw': ['@tldraw/tldraw', '@tldraw/state', '@tldraw/store'],
+            'vendor-mui': ['@mui/material', '@mui/icons-material', '@emotion/react', '@emotion/styled'],
+            'vendor-supabase': ['@supabase/supabase-js'],
+          },
+        },
+      },
     },
 
     resolve: {