fix(*): Web 构建 - 修复短剧项目空间合并后的 TypeScript 类型错误

web/src/lib/canvas/canvas-export.ts

@@ -22,7 +22,7 @@ export async function exportCanvasProjects(projects: CanvasProject[], fileName =
                     zipFiles.push({ name: path, data: blob });
                 }),
             );
-            const drawingDocuments = (await Promise.all(project.nodes.filter((node) => node.type === "drawing" && node.metadata?.drawingId).map(async (node) => {
+            const drawingDocuments = (await Promise.all(project.nodes.filter((node) => node.type === "drawing" && node.metadata?.drawingId).map(async (node): Promise<CanvasDrawingExport | null> => {
                 const drawingId = node.metadata?.drawingId;
                 if (!drawingId) return null;
                 const [saved, preview, render] = await Promise.all([
@@ -43,7 +43,7 @@ export async function exportCanvasProjects(projects: CanvasProject[], fileName =
                         ? { path: generationRenderPath, pageId: render.pageId, width: render.width, height: render.height, mimeType: render.mimeType, background: render.background }
                         : undefined,
                 } satisfies CanvasDrawingExport;
-            }))).filter((item): item is CanvasDrawingExport => Boolean(item));
+            }))).filter((item): item is CanvasDrawingExport => item !== null);
             drawingDocuments.forEach((document) => zipFiles.push({ name: `projects/${project.id}/drawings/${safeFileName(document.drawingId)}.json`, data: JSON.stringify(document) }));
             return { project, files, drawingDocuments };
         }),