fix: fix corepack install command (remove bad input/stdin)

npm_install.py

@@ -2172,17 +2172,13 @@ def _build_frontend(src_frontend: Path, dest_frontend: Path):
             if shutil.which("corepack"):
                 try:
                     # Enable corepack
-                    result = subprocess.run(
+                    subprocess.run(
                         ["corepack", "enable"],
-                        input="",
-                        stdin=subprocess.PIPE,
                         capture_output=True,
                         timeout=10,
-                        text=True,
                         check=False,
                     )
                     
-                    if result.returncode == 0 or "already" in (result.stderr or "").lower():
                     # Install Yarn stable (4.x)
                     result = subprocess.run(
                         ["corepack", "install", "-g", "yarn@stable"],