build: publish frontend source maps

app/game-frontend/test/viteConfig.test.ts

@@ -1,5 +1,7 @@
 import assert from 'node:assert/strict';
+import path from 'node:path';
 import { describe, it } from 'node:test';
+import { loadConfigFromFile } from 'vite';
 import { mergeViteEnv } from '../src/config/viteEnv.ts';
 
 void describe('game frontend Vite config', () => {
@@ -12,4 +14,18 @@ void describe('game frontend Vite config', () => {
         assert.equal(env.VITE_APP_BASE_PATH, '/hwe');
         assert.equal(env.VITE_GAME_API_URL, '/hwe/api/trpc');
     });
+
+    void it('keeps production source maps enabled', async () => {
+        const configPath = path.resolve(import.meta.dirname, '../vite.config.ts');
+        const loaded = await loadConfigFromFile(
+            { command: 'build', mode: 'production' },
+            configPath,
+            path.dirname(configPath),
+            undefined,
+            undefined,
+            'runner'
+        );
+
+        assert.equal(loaded?.config.build?.sourcemap, true);
+    });
 });