Create a clean, premium Open Graph image (1200×630) for an open-source GitHub project called "toast-queue". Use a dark charcoal background with a subtle radial gradient. In the center, show three modern toast notification cards stacked diagonally upward to represent a queue. Each toast has rounded corners, thin borders, soft shadows, and slight glassmorphism. Add a gentle blue-to-violet glow behind the stack. Large title "toast-queue" in bold white sans-serif on the left, with the subtitle "Queue toast notifications with predictable ordering." Below, smaller muted text: "GitHub • TypeScript • React". The design should feel minimal, elegant, and inspired by Vercel, shadcn/ui, and Linear, with lots of negative space and no unnecessary decorations.