feat: add savedFilename/savedFilePath fields to Generate3DNodeData

Add optional fields to track the auto-saved 3D model filename and
file path, with null defaults in nodeDefaults and quickstart validation.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/lib/quickstart/validation.ts

@@ -257,6 +257,8 @@ function createDefaultNodeData(type: NodeType): WorkflowNodeData {
         inputImages: [],
         inputPrompt: null,
         output3dUrl: null,
+        savedFilename: null,
+        savedFilePath: null,
         selectedModel: undefined,
         status: "idle",
         error: null,

src/store/utils/nodeDefaults.ts

@@ -153,6 +153,8 @@ export const createDefaultNodeData = (type: NodeType): WorkflowNodeData => {
         inputImages: [],
         inputPrompt: null,
         output3dUrl: null,
+        savedFilename: null,
+        savedFilePath: null,
         selectedModel: nodeDefaults.generate3d?.selectedModel,
         status: "idle",
         error: null,

src/types/nodes.ts

@@ -183,6 +183,8 @@ export interface Generate3DNodeData extends BaseNodeData {
   inputImageRefs?: string[];
   inputPrompt: string | null;
   output3dUrl: string | null;
+  savedFilename?: string | null;
+  savedFilePath?: string | null;
   selectedModel?: SelectedModel;
   parameters?: Record<string, unknown>;
   inputSchema?: ModelInputDef[];