fix(前端): 启动前清理 Next 缓存

关键改动：

- 前端 dev 启动前删除可能残留的 .next 缓存

- 新增安全路径校验，避免清理脚本误删 Web 应用外目录

Co-Authored-By: Codex GPT-5 <codex@openai.com>

apps/web/package.json

@@ -3,7 +3,7 @@
   "version": "0.0.1",
   "private": true,
   "scripts": {
-    "dev": "node --max-old-space-size=4096 node_modules/next/dist/bin/next dev --port 3000",
+    "dev": "node scripts/clean-next-dev-cache.mjs && node --max-old-space-size=4096 node_modules/next/dist/bin/next dev --port 3000",
     "build": "node --max-old-space-size=4096 node_modules/next/dist/bin/next build",
     "start": "next start",
     "lint": "next lint",