fix(backoffice): React 19 read-only property runtime errors

Menambahkan resolve.dedupe untuk react/react-dom/@tanstack/react-router/
@tanstack/react-query di vite.config.ts agar tidak ada duplicate instance
yang di-bundle dari Radix primitives.

Menghapus StrictMode dari main.tsx karena combining StrictMode dengan
recharts 3.x (yang bawa @reduxjs/toolkit + immer autoFreeze) + TanStack
Router 1.168 trigger "Cannot assign to read only property 'lanes' of
#<li>" dan "pendingBuiltLocation of #<zr>" saat navigate.

Juga perbaiki duplikasi block build: di config lama ada dua property
build (yang kedua menimpa yang pertama jadi rolldownOptions hilang).
Sekarang rolldownOptions code-splitting vendor aktif.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

apps/backoffice/vite.config.ts

@@ -16,7 +16,9 @@ export default defineConfig(() => ({
     port: 3001,
     host: 'localhost',
   },
-  build: { rolldownOptions: { output: { codeSplitting: { groups: [{ name: 'vendor', test: /node_modules/ }] } } } },
+  resolve: {
+    dedupe: ['react', 'react-dom', '@tanstack/react-router', '@tanstack/react-query'],
+  },
   plugins: [
     TanStackRouterVite({
       routeFileIgnorePattern: '_components|_hooks|_hook|_data',
@@ -32,6 +34,9 @@ export default defineConfig(() => ({
     commonjsOptions: {
       transformMixedEsModules: true,
     },
+    rolldownOptions: {
+      output: { codeSplitting: { groups: [{ name: 'vendor', test: /node_modules/ }] } },
+    },
   },
   test: {
     watch: false,