feat: full screen node

frontend/src/lib/nodeRegistry.ts

@@ -45,6 +45,8 @@ export type NodeTypeDescriptor = {
   getResetData?: (nodeId?: string) => Record<string, unknown>
   /** Optional: label shown on edge when this type is the target (e.g. "render", "add input"). */
   connectionLabel?: string
+  /** When true, double-clicking the node header opens a fullscreen dialog for this node. */
+  supportsFullscreen?: boolean
 }
 
 const registry = new Map<string, NodeTypeDescriptor>()