refactor(*): 代码质量 - 优化前后端实现并完善协议与画布验证

web/src/types/canvas-export.ts

@@ -2,7 +2,7 @@ import type { CanvasProject } from "@/stores/canvas/use-canvas-store";
 import type { CanvasDrawingEngine } from "@/lib/canvas/canvas-drawing-engine";
 
 export type CanvasExportFile = {
-    app: "infinite-canvas";
+    app: "yingce";
     version: 3 | 4;
     exportedAt: string;
     projects: CanvasProjectExportItem[];