fix: remove stale lockfile before vp install in install scripts

When reinstalling, a stale pnpm-lock.yaml from a previous install
remains in the version directory. With CI=true, pnpm uses
--frozen-lockfile which rejects the mismatch between the old lockfile
and the new package.json, causing bootstrap-cli to fail.

Author: fengmk2

packages/global/install.ps1

@@ -406,6 +406,11 @@ function Main {
     $pkg.PSObject.Properties.Remove("optionalDependencies")
     $pkg | ConvertTo-Json -Depth 10 | Set-Content $pkgFile
 
+    # Remove stale lockfile and node_modules to avoid frozen-lockfile conflicts
+    # when package.json changes between installs
+    Remove-Item -Path "$VersionDir\pnpm-lock.yaml" -Force -ErrorAction SilentlyContinue
+    Remove-Item -Path "$VersionDir\node_modules" -Recurse -Force -ErrorAction SilentlyContinue
+
     # Install production dependencies
     Push-Location $VersionDir
     try {

packages/global/install.sh

@@ -640,6 +640,11 @@ main() {
     { print }
   ' "$pkg_file" > "$pkg_file.tmp" && mv "$pkg_file.tmp" "$pkg_file"
 
+  # Remove stale lockfile and node_modules to avoid frozen-lockfile conflicts
+  # when package.json changes between installs
+  rm -f "$VERSION_DIR/pnpm-lock.yaml"
+  rm -rf "$VERSION_DIR/node_modules"
+
   # Install production dependencies
   (cd "$VERSION_DIR" && CI=true "$BIN_DIR/vp" install --silent)