Integrate Canvas V2 subgraphs, editable edges and AI runs

src/lib/workspace.ts

@@ -10,6 +10,8 @@ export type Board = {
   version: number;
   content?: { schema_version: number };
   description?: string;
+  parent_board_id?: string;
+  frame_id?: string;
 };
 export function matchesRef(item: { id: string; slug?: string } | null | undefined, ref: string | undefined) { return Boolean(item && ref && (item.id === ref || item.slug === ref)); }
 export const DEFAULT_BOARD_TITLE = "未命名图谱";