feat: full screen node

frontend/src/lib/flowContext.tsx

@@ -22,6 +22,9 @@ export type FlowContextValue = {
     isValidConnection: (connection: Connection) => boolean
     /** Set by FlowKeyboardShortcuts so Node menubar can trigger paste / fit view. */
     flowActionsRef: React.MutableRefObject<FlowActions | null>
+    /** When set, graph centers on this node and a fullscreen dialog shows the node. Cleared on close. */
+    fullscreenNodeId: string | null
+    setFullscreenNodeId: (id: string | null) => void
 }
 
 const FlowContext = React.createContext<FlowContextValue | null>(null)

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>()

frontend/src/lib/registerBuiltinNodes.tsx

@@ -42,6 +42,7 @@ export function registerBuiltinNodes(): void {
       title: nodeId ?? '',
     }),
     connectionLabel: 'adding input',
+    supportsFullscreen: true,
   })
 
   registerNodeType({
@@ -58,6 +59,7 @@ export function registerBuiltinNodes(): void {
     menuLabel: 'Renderer',
     menuIcon: <Sparkles className={ICON_CLASS} />,
     connectionLabel: 'rendering',
+    supportsFullscreen: true,
   })
 
   registerNodeType({
@@ -75,6 +77,7 @@ export function registerBuiltinNodes(): void {
     menuLabel: 'Agent',
     menuIcon: <Bot className={ICON_CLASS} />,
     connectionLabel: 'prompt/context',
+    supportsFullscreen: true,
   })
 
   registerNodeType({
@@ -128,5 +131,6 @@ export function registerBuiltinNodes(): void {
     menuIcon: <Code2 className={ICON_CLASS} />,
     getResetData: () => ({ body: '' }),
     connectionLabel: 'adding input',
+    supportsFullscreen: true,
   })
 }