perf: optimize the diffPreferences logic and adjust the unit test (#4130)

internal/vite-config/src/plugins/importmap.ts

@@ -80,7 +80,7 @@ async function viteImportMapPlugin(
   const firstLayerKeys = Object.keys(scopes);
   const inputMapScopes: string[] = [];
   firstLayerKeys.forEach((key) => {
-    inputMapScopes.push(...Object.keys(scopes[key]));
+    inputMapScopes.push(...Object.keys(scopes[key] || {}));
   });
   const inputMapImports = Object.keys(imports);
 
@@ -160,7 +160,10 @@ async function viteImportMapPlugin(
             options.defaultProvider || DEFAULT_PROVIDER,
           );
 
-          const resultHtml = await injectShimsToHtml(html, esModuleShimsSrc);
+          const resultHtml = await injectShimsToHtml(
+            html,
+            esModuleShimsSrc || '',
+          );
           html = await minify(resultHtml || html, {
             collapseWhitespace: true,
             minifyCSS: true,

internal/vite-config/src/plugins/inject-metadata.ts

@@ -16,8 +16,8 @@ function resolvePackageVersion(
 async function resolveMonorepoDependencies() {
   const { packages } = await getPackages();
 
-  const resultDevDependencies: Record<string, string> = {};
-  const resultDependencies: Record<string, string> = {};
+  const resultDevDependencies: Record<string, string | undefined> = {};
+  const resultDependencies: Record<string, string | undefined> = {};
   const pkgsMeta: Record<string, string> = {};
 
   for (const { packageJson } of packages) {