fix: Node 22 + package-lock.json + node_modules gitignore

- deploy-docs.yml: node-version 20 -> 22 (Node 20 deprecated on Actions)
- package-lock.json: 补齐锁文件（npm ci 必需）
- .gitignore: 添加 node_modules/ 忽略规则

Author: i-stack

.github/workflows/deploy-docs.yml

@@ -27,7 +27,7 @@ jobs:
 
       - uses: actions/setup-node@v4
         with:
-          node-version: 20
+          node-version: 22
           cache: npm
 
       - name: Install dependencies

.gitignore

@@ -14,4 +14,5 @@ env/secrets.json
 .cursor/
 .codex/
 .claude/
+node_modules/
 skills-engineering/ios-engineer/evolution/usage