fix: add resolve.dedupe for react/react-dom to prevent duplicate instances

In pnpm strict mode, Vite's dependency pre-bundling can create
separate React module instances for different dependency chains
(e.g. react-router-dom importing its own React copy). This causes
"Invalid hook call" errors when Link/useContext tries to access
React internals from a different instance than the one rendering.

Adding resolve.dedupe ensures all packages resolve to the same
physical React module.

Co-authored-by: hotlong <50353452+hotlong@users.noreply.github.com>

Author: Copilot

apps/web/vite.config.ts

@@ -19,6 +19,7 @@ export default defineConfig({
   plugins: [react(), tailwindcss(), htmlBaseUrl()],
   base,
   resolve: {
+    dedupe: ['react', 'react-dom'],
     alias: {
       '@': resolve(__dirname, 'src'),
     },