fix: update Context Engineering link and add @vuepress/helper dependency

- Replace WeChat article link with internal javaguide.cn link for Context Engineering
- Add @vuepress/helper to package.json dependencies (needed by CI)

Co-authored-by: Cursor <cursoragent@cursor.com>

Author: Snailclimb

docs/ai-coding/practices/the-cool-tricks-for-vibe-coding.md

@@ -275,7 +275,7 @@ pnpm lint
 
 ## 上下文别越堆越乱
 
-小 G 之前写过一篇 [Context Engineering](https://mp.weixin.qq.com/s/qmhnwYGAYE6dWcMZw22j0A)，里面有个观点放到 Vibe Coding 里也很适用：**上下文窗口大不等于效果好——窗口能装更多东西，但模型能不能稳定找到重点，是另一回事。**
+小 G 之前写过一篇 [Context Engineering](https://javaguide.cn/ai/agent/context-engineering.html)，里面有个观点放到 Vibe Coding 里也很适用：**上下文窗口大不等于效果好——窗口能装更多东西，但模型能不能稳定找到重点，是另一回事。**
 
 ![上下文为什么会失效](https://oss.javaguide.cn/github/javaguide/ai/context-engineering/why-does-the-following-content-fail.png)
 

package.json

@@ -44,6 +44,7 @@
   },
   "dependencies": {
     "@vuepress/bundler-vite": "2.0.0-rc.28",
+    "@vuepress/helper": "2.0.0-rc.128",
     "@vuepress/plugin-docsearch": "2.0.0-rc.128",
     "@vuepress/plugin-feed": "2.0.0-rc.128",
     "husky": "9.1.7",