fix(cli): pass --no-frozen-lockfile to vp install in CI

Yarn Berry defaults to enableImmutableInstalls in CI, preventing
lockfile creation. Pass --no-frozen-lockfile when CI env is set so
vp create can generate fresh lockfiles.

Author: fengmk2

packages/cli/src/utils/prompts.ts

@@ -73,9 +73,10 @@ export async function runViteInstall(
   const spinner = options?.silent ? getSilentSpinner() : getSpinner(interactive);
   const startTime = Date.now();
   spinner.start(`Installing dependencies...`);
+  const ciArgs = process.env.CI ? ['--no-frozen-lockfile'] : [];
   const { exitCode, stderr, stdout } = await runCommandSilently({
     command: process.env.VP_CLI_BIN ?? 'vp',
-    args: ['install', ...(extraArgs ?? [])],
+    args: ['install', ...ciArgs, ...(extraArgs ?? [])],
     cwd,
     envs: process.env,
   });