fix(cli): revert --no-frozen-lockfile, set enableImmutableInstalls in .yarnrc.yml

Revert passing --no-frozen-lockfile to vp install from vp create.
Instead, set enableImmutableInstalls: false in .yarnrc.yml so yarn
Berry can create/update lockfiles in CI where it defaults to immutable.

Author: fengmk2

packages/cli/src/create/bin.ts

@@ -804,14 +804,9 @@ Use \`vp create --list\` to list all available templates, or run \`vp create --h
       installGitHooks(fullPath, compactOutput);
     }
     updateCreateProgress('Installing dependencies');
-    const installSummary = await runViteInstall(
-      fullPath,
-      options.interactive,
-      ['--no-frozen-lockfile'],
-      {
-        silent: compactOutput,
-      },
-    );
+    const installSummary = await runViteInstall(fullPath, options.interactive, undefined, {
+      silent: compactOutput,
+    });
     updateCreateProgress('Formatting code');
     await runViteFmt(fullPath, options.interactive, undefined, { silent: compactOutput });
     clearCreateProgress();
@@ -960,14 +955,9 @@ Use \`vp create --list\` to list all available templates, or run \`vp create --h
 
     updateWorkspaceConfig(projectDir, workspaceInfo);
     updateCreateProgress('Installing dependencies');
-    installSummary = await runViteInstall(
-      workspaceInfo.rootDir,
-      options.interactive,
-      ['--no-frozen-lockfile'],
-      {
-        silent: compactOutput,
-      },
-    );
+    installSummary = await runViteInstall(workspaceInfo.rootDir, options.interactive, undefined, {
+      silent: compactOutput,
+    });
     updateCreateProgress('Formatting code');
     await runViteFmt(workspaceInfo.rootDir, options.interactive, [projectDir], {
       silent: compactOutput,

packages/cli/src/migration/migrator.ts

@@ -1125,6 +1125,11 @@ function rewriteYarnrcYml(projectPath: string): void {
     if (!doc.has('nodeLinker')) {
       doc.set('nodeLinker', 'node-modules');
     }
+    // Disable immutable installs so yarn can create/update lockfiles
+    // (yarn Berry defaults to enableImmutableInstalls: true in CI)
+    if (!doc.has('enableImmutableInstalls')) {
+      doc.set('enableImmutableInstalls', false);
+    }
     // catalog
     rewriteCatalog(doc);
   });