0.2 在线版本打通

wolai-frontend/src/app/api/mindmap/[docId]/route.ts

@@ -2,6 +2,7 @@ import { NextResponse } from "next/server";
 import { createSupabaseRouteClient } from "@/lib/supabase/server";
 import { promises as fs } from "fs";
 import path from "path";
+import { getDocumentsBaseDir, getLegacyMindmapsBaseDir } from "@/lib/server/local-paths";
 
 const defaultMindmapData = {
   data: { text: "中心主题" },
@@ -10,8 +11,8 @@ const defaultMindmapData = {
 
 // 新版：与页面文件夹（index.md 所在处）对齐，放在 public/documents/<docId>/mindmap.json
 // 旧版遗留：public/mindmaps/<docId>/mindmap.json
-const preferredBaseDir = path.join(process.cwd(), "public", "documents");
-const legacyBaseDir = path.join(process.cwd(), "public", "mindmaps");
+const preferredBaseDir = getDocumentsBaseDir();
+const legacyBaseDir = getLegacyMindmapsBaseDir();
 
 async function ensureDir(dir: string) {
   await fs.mkdir(dir, { recursive: true });