v1.18 Sonnet 3.5 Support

Update your image with:

docker pull promptpanel/promptpanel:1.18

and then re-create your container.

Features:

• Added Sonnet to Anthropic onboarding, plugin, and Universal LLM model.
• Added "Panel frame" mode for default template and JON manifest (to link external services) [beta: coming soon].

Enhancements:

• Fixed Deepseek listing for "simple" model fields as well as the main ones.
• Small timezone / linking to new website tweaks.
• Requirements bump.