feat(canvas): TapNow - 支持公开画布导入 (#255)

(cherry picked from commit 9b96135a5e409b4718e6204ab4212b7ef22635aa)

web/src/types/canvas.ts

@@ -142,6 +142,13 @@ export type CanvasSkillSnapshot = {
 };
 
 export type CanvasNodeMetadata = {
+    importSource?: {
+        provider: "tapnow";
+        shareId: string;
+        nodeId: string;
+        batchId: string;
+        sourceType?: string;
+    };
     content?: string;
     richText?: Record<string, unknown>;
     composerContent?: string;