Goal

Provide a lightweight, beautiful, interactive onboarding experience that introduces users to Querya's core workflow without text overload:

1. Interactive Welcome Tour Modal (): 4 concise visual slides (Connect, Sidebar & Shortcuts, Editor & Grid, Security) with hotkey badges, step dots, and keyboard navigation.
2. Demo Playground in 1-Click (): Instantly boots a sample in-memory SQLite database with sample tables (users, orders, products) and opens a ready-to-run query so users can immediately experience sorting, resizing, multi-cell copy, and spring animations without server setup.
3. Menu & Hero Integration: Accessible from Help -> Welcome & Quick Tour… (F1 / Cmd+Shift+H) and modern interactive action cards on WorkspaceEmptyHero.
4. Persistence: Tracks has_completed_welcome_tour in AppSettings.