fix resolve res in Vitest

vitest.config.ts

@@ -1,6 +1,14 @@
+import path from 'node:path';
+
 import {defineConfig} from 'vitest/config';
 
 export default defineConfig({
+  resolve: {
+    alias: {
+      // Keep shared components' application-root imports resolvable in tests.
+      '@': path.resolve(__dirname, '.'),
+    },
+  },
   test: {
     environment: 'node',
     globals: true,
@@ -12,6 +20,7 @@ export default defineConfig({
       'miniprogram/**/*.test.js',
       'scripts/**/*.test.ts',
       'packages/shared/src/**/*.test.ts',
+      'packages/shared/src/**/*.test.tsx',
     ],
   },
 });