chore(vite): prioritise .tsx/.ts over .js in resolve.extensions

Prevents stale compiled .js files from shadowing their .tsx sources
when the AI agent builds or type-checks the frontend.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

frontend/vite.config.ts

@@ -26,6 +26,7 @@ export default defineConfig({
     __APP_GITSHA__: JSON.stringify(APP_GITSHA),
   },
   resolve: {
+    extensions: ['.tsx', '.ts', '.jsx', '.mjs', '.js', '.json'],
     alias: {
       '@': path.resolve(__dirname, './src'),
     },