ci(macos): drop npm cache and use npm install to match win/linux

The mac workflow enabled cache: npm with cache-dependency-path pointing
at package-lock.json, but that file is gitignored and never committed, so
setup-node failed with 'unable to cache dependencies' and npm ci would
also fail without a lockfile. Align with the win/linux workflows which use
plain npm install and no cache.

.github/workflows/macos-desktop-release-package.yml

@@ -35,15 +35,13 @@ jobs:
         uses: actions/setup-node@v4
         with:
           node-version: "20"
-          cache: npm
-          cache-dependency-path: frontends/desktop/package-lock.json
 
       - name: Install Rust stable
         uses: dtolnay/rust-toolchain@stable
 
       - name: Install frontend dependencies
         working-directory: frontends/desktop
-        run: npm ci
+        run: npm install
 
       - name: Build Tauri app
         working-directory: frontends/desktop