feat(docs): add local development and canvas data structure documentation

docs/content/docs/development/canvas-data-structure.mdx

@@ -5,7 +5,7 @@ description: 画布本地存储、节点结构、媒体文件与清理机制
 
 # 画布数据结构
 
-本文档说明当前画布在前端本地保存的数据结构、图片文件的存储和清理方式，以及后续接入后端存储时建议保持的兼容边界。
+本文档说明当前画布在前端本地保存的数据结构、图片文件的存储和清理方式。
 
 ## 当前存储位置
 

docs/content/docs/meta.json

@@ -4,7 +4,7 @@
   "pages": [
     "overview",
     "canvas",
-    "backend",
+    "development",
     "progress",
     "business",
     "support"

docs/index.md

@@ -15,8 +15,8 @@
 
 ## 开发与数据
 
-- [本地开发](/docs/backend/local-development)
-- [画布数据结构](/docs/backend/canvas-data-structure)
+- [本地开发](/docs/development/local-development)
+- [画布数据结构](/docs/development/canvas-data-structure)
 
 ## 商务合作
 

docs/src/components/docs-top-tabs.tsx

@@ -7,7 +7,7 @@ import { cn } from '@/lib/cn';
 const tabs = [
   { title: '项目介绍', href: '/docs/overview/quick-start', prefix: '/docs/overview' },
   { title: '操作手册', href: '/docs/canvas/canvas-node-manual', prefix: '/docs/canvas' },
-  { title: '开发文档', href: '/docs/backend/local-development', prefix: '/docs/backend' },
+  { title: '开发文档', href: '/docs/development/local-development', prefix: '/docs/development' },
   { title: '项目进度', href: '/docs/progress/changelog', prefix: '/docs/progress' },
   { title: '商务合作', href: '/docs/business/business', prefix: '/docs/business' },
   { title: '赞助支持', href: '/docs/support/donate', prefix: '/docs/support' },