Initial commit: Markdown editor with file management and regex tools

项目特性：
- 完整的Markdown编辑器，支持实时预览
- 文件管理功能，支持保存/加载/删除文件
- 正则表达式工具，支持批量文本替换
- 前后端分离架构
- 响应式设计

技术栈：
- 前端：React + TypeScript + Vite
- 后端：Python Flask
- Markdown解析：Python-Markdown

包含组件：
- WorkingMarkdownEditor: 基础功能版本
- FullMarkdownEditor: 完整功能版本
- SimpleMarkdownEditor: 简化版本

frontend/package.json

@@ -0,0 +1,37 @@
+{
+  "name": "markdown-editor-frontend",
+  "private": true,
+  "version": "1.0.0",
+  "type": "module",
+  "scripts": {
+    "dev": "vite",
+    "build": "tsc && vite build",
+    "lint": "eslint . --ext ts,tsx --report-unused-disable-directives --max-warnings 0",
+    "preview": "vite preview"
+  },
+  "dependencies": {
+    "react": "^18.2.0",
+    "react-dom": "^18.2.0",
+    "axios": "^1.5.0",
+    "react-markdown": "^8.0.7",
+    "remark-gfm": "^3.0.1",
+    "remark-math": "^5.1.1",
+    "rehype-katex": "^6.0.3",
+    "katex": "^0.16.8",
+    "prismjs": "^1.29.0",
+    "@monaco-editor/react": "^4.6.0",
+    "react-split": "^2.0.14"
+  },
+  "devDependencies": {
+    "@types/react": "^18.2.15",
+    "@types/react-dom": "^18.2.7",
+    "@typescript-eslint/eslint-plugin": "^6.0.0",
+    "@typescript-eslint/parser": "^6.0.0",
+    "@vitejs/plugin-react": "^4.0.3",
+    "eslint": "^8.45.0",
+    "eslint-plugin-react-hooks": "^4.6.0",
+    "eslint-plugin-react-refresh": "^0.4.3",
+    "typescript": "^5.0.2",
+    "vite": "^4.4.5"
+  }
+}