v1.2.5 — Fix 'cfg is not defined' configuration error

🐛 Bug Fix

• Fixed cfg is not defined error that broke the card regardless of Radarr/Sonarr configuration. Changed bare cfg.show_shimmer to this._config.show_shimmer in the _render() CSS template literal (line 1006).

What happened

The show_shimmer CSS conditional referenced a variable cfg that was never defined in scope, causing a ReferenceError that prevented the entire card from rendering. All other config values correctly use this._config.* — this was the lone stray reference.