Custom panels with AI

**What the feature is (as Title)**
Users can create fully custom dashboard panels by describing what they need in natural language. AI generates the panel — including its layout, content, and styling — directly within the dashboard.

**Value proposition**
Standard panel types don't always cover every use case. Users sometimes need bespoke visualizations, formatted summaries, or tailored content that falls outside what built-in panel types offer. With AI-generated custom panels, users can fill those gaps without writing code or leaving the dashboard editor.

**Expected outcome**
- Users describe the panel they want in plain language through chat.
- AI generates a custom panel and places it on the dashboard, ready to use.
- Generated panels can include custom visualizations, formatted text, calculated metrics, or any combination tailored to the user's request.
- Users can iterate on the result by refining their prompt to adjust the panel's content or appearance.

**Optional: Key user stories / use cases**