Skip pnpm install scripts; defer QR code fetch & fix #1804

CI: use `pnpm i --ignore-scripts` in release-publish workflow to avoid running package install scripts during CI.

Shell: defer showing the QR code until after attempting WebUi quick-login/password fallback. Adds checks for NAPCAT_QUICK_ACCOUNT and quick-password env vars (and WebUi quick-login list), runs WebUi quick config, and only calls getQRCodePicture() if no fallback was attempted and the user is not logged in. Includes error handling for the quick-login attempt.