Fix GitHub Actions deployment: Use npm install instead of npm ci

- Remove npm cache configuration that requires package-lock.json
- Use npm install for dependencies installation
- Resolves deployment error for projects without lock files

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: babayomi

.github/workflows/deploy.yml

@@ -28,10 +28,9 @@ jobs:
         uses: actions/setup-node@v4
         with:
           node-version: '18'
-          cache: 'npm'
 
       - name: Install dependencies
-        run: npm ci
+        run: npm install
 
       - name: Build CSS
         run: npm run build