docs(product-overview): update AI Compose Commit description and video showcase intro

Update product overview documentation to reflect AI Compose Commit's team customization capabilities. Add context about Co-Authored-By signature configuration allowing teams to use their own bot names and email domains. Improve video showcase section introduction for both locales to clarify platform-specific entry points.

Changes:
- Expand AI Compose Commit section with team customization context
- Add Co-Authored-By repository/global configuration mention
- Update video showcase intro for English to explain YouTube primary entry
- Update video showcase intro for Chinese to explain Bilibili primary entry
- Enhance AI Compose Commit link card descriptions with config details

Co-Authored-By: Hagicode <noreply@hagicode.com>
Signed-off-by: newbe36524 <newbe36524@qq.com>

Author: newbe36524

src/content/docs/en/product-overview.mdx

@@ -196,10 +196,11 @@ HagiCode provides **AI Compose Commit**, which brings commit message generation
 - you do not need to remember every change line by line
 - you do not need to improvise a rushed commit description at the last minute
 - you can let AI organize a clearer commit message based on the actual diff
+- in the Turbo Engine workflow, you can also customize the AI `Co-Authored-By` signature and let repository-level config override your global default
 
 ![AI Compose Commit entry point inside HagiCode](../img/screenshots/ai-compose-commit/trigger-ai-compose-commit-button/original.png)
 
-Its value is not just saving a few dozen seconds. It is that "commit" finally stops being detached from the rest of the context.
+Its value is not just saving a few dozen seconds. It is that "commit" finally stops being detached from the rest of the context. For teams, that also means AI-generated commits can keep using the bot name, company email domain, and repository convention they already rely on instead of being locked to one fixed signature.
 
 ### 5. Code Server integration makes both local and remote editing smoother
 
@@ -388,12 +389,14 @@ If you are ready to use it for real, I recommend starting with this path:
   <LinkCard
     title="AI Compose Commit"
     href="/en/guides/ai-compose-commit"
-    description="See how AI brings Git commit writing into the daily development workflow."
+    description="See how AI brings Git commit writing into the daily workflow and lets teams customize the Co-Authored-By signature with repository and global Git config."
   />
 </CardGrid>
 
 <ProductHuntBadge locale="en" />
 
+If you would rather understand the product through video first, the section below now gives the English page its own clearest entry point: the primary recommendation stays on YouTube, and the title, summary, and CTA all spell the platform out. Even before you open a new tab, the section explains why that video is the right place to start.
+
 <ProductVideoShowcase locale="en" />
 
 ---

src/content/docs/product-overview.mdx

@@ -196,10 +196,11 @@ HagiCode 提供了 **AI Compose Commit**，让提交说明的生成也进入工
 - 你不需要逐行回忆自己改了什么
 - 你不需要临时组织一段仓促的提交描述
 - 你可以让 AI 根据实际变更整理更清楚的提交信息
+- 你还可以在 Turbo Engine 工作流里为 AI 提交配置自定义 `Co-Authored-By` 署名，用项目级配置覆盖全局默认值
 
 ![HagiCode 中的 AI Compose Commit 入口](./img/screenshots/ai-compose-commit/trigger-ai-compose-commit-button/original.png)
 
-它的价值，不只是节省几十秒，而是让“提交”这件事终于不再脱离上下文。
+它的价值，不只是节省几十秒，而是让“提交”这件事终于不再脱离上下文。对团队来说，这也意味着可以继续沿用自己的 bot 名称、企业邮箱域名和仓库级规范，而不是把所有 AI 提交都固定成同一条署名。
 
 ### 5. Code Server 集成让本地和远程编辑都更顺手
 
@@ -388,12 +389,14 @@ HagiCode 里有一整套围绕英雄、职业、负载、等级进度展开的
   <LinkCard
     title="AI Compose Commit"
     href="/guides/ai-compose-commit"
-    description="查看 AI 如何把 Git 提交流程也纳入日常开发工作流。"
+    description="查看 AI 如何把 Git 提交流程也纳入日常开发工作流，并通过项目级/全局级配置自定义 Co-Authored-By 署名。"
   />
 </CardGrid>
 
 <ProductHuntBadge locale="zh-CN" />
 
+如果你更想先用视频理解产品，这里已经按当前中文语境放好了最合适的入口：主推荐会直接指向 Bilibili，标题、摘要和按钮都会明确写出平台。就算你暂时不点开外链，也能先在页面里读懂这条视频为什么值得先看。
+
 <ProductVideoShowcase locale="zh-CN" />
 
 ---