docs(product-overview): add editions and pricing section

Add comprehensive editions and pricing comparison table covering
Desktop, Container, Steam, and Hagicode Plus variants.
Include DLC packages overview with feature comparison and
proposal concurrency rules.

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

Author: newbe36524

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

@@ -292,6 +292,57 @@ So what HagiCode ultimately wants to promote is not one isolated feature, but a
 
 > **Upgrade AI development from "ask once, answer once" into a full chain of understanding, planning, execution, knowledge capture, and feedback.**
 
+## Editions & Pricing
+
+Once you understand what HagiCode is trying to be, the next practical question is usually simple: which edition should you start with, and what do the DLC packages actually change?
+
+In the table below, `✓` means supported and `✗` means not supported.
+
+| Item | Desktop | Container | Steam | Hagicode Plus |
+| --- | --- | --- | --- | --- |
+| Entry point | [Desktop Installation](/en/installation/desktop) | [Container Deployment](/en/installation/docker-compose) | [View on Steam](https://store.steampowered.com/app/4625540/Hagicode/) | [View on Steam](https://store.steampowered.com/app/4625540/Hagicode/) |
+| Pricing | Free | Free | View on Steam | View on Steam |
+| All free features included | ✓ | ✓ | ✓ | ✓ |
+| Vault | ✓ | ✓ | ✓ | ✓ |
+| Skills | ✓ | ✓ | ✓ | ✓ |
+| Proposal workflow | ✓ | ✓ | ✓ | ✓ |
+| Local achievements | ✓ | ✓ | ✓ | ✓ |
+| All Agent CLI integrations | ✓ | ✓ | ✓ | ✓ |
+| Speech recognition | ✓ | ✓ | ✓ | ✓ |
+| OmniRoute integration | ✓ | ✓ | ✓ | ✓ |
+| GitHub integration | ✓ | ✓ | ✓ | ✓ |
+| Git management | ✓ | ✓ | ✓ | ✓ |
+| Maximum concurrent proposals | 3 | 3 | 3 | 32 |
+| Copy switching support | ✗ | ✗ | ✗ | ✓ |
+| Steam cloud achievements | ✗ | ✗ | ✓ | ✓ |
+| Free DLC support | ✗ | ✗ | ✓ | ✓ |
+| Steam Workshop support | ✗ | ✗ | ✓ | ✓ |
+| Cloud save support | ✗ | ✗ | ✓ | ✓ |
+
+**Proposal concurrency rule.** The free editions and the base Steam edition both start with a 3-proposal concurrency cap. Proposals that are generating, executing, and archiving all count toward that same limit. Turbo Engine DLC expands the cap to 32.
+
+**What Hagicode Plus means.** Hagicode Plus is the Steam main edition plus the Turbo Engine DLC. In direct user terms, it is the purchase path for "Steam edition + higher concurrency and enhanced capabilities."
+
+### DLC Packages
+
+<CardGrid>
+  <LinkCard
+    title="Free DLC · Hagicode - All Beauties Pack"
+    href="https://store.steampowered.com/app/4625540/Hagicode/"
+    description="Free. An extra cosmetics pack for Steam users with 1,000 additional anime-style avatars, while leaving room for more beauty-themed extras in future updates."
+  />
+  <LinkCard
+    title="Performance DLC · Hagicode: Turbo Engine DLC"
+    href="https://store.steampowered.com/app/4625540/Hagicode/"
+    description='View on Steam. You can buy it on its own to expand maximum proposal concurrency from 3 to 32 and unlock copy switching support. On our storefront, "Steam main edition + Turbo Engine DLC" is commonly presented as Hagicode Plus.'
+  />
+  <LinkCard
+    title="Supporter DLC · Hagicode - Sponsor Pack"
+    href="https://store.steampowered.com/app/4625540/Hagicode/"
+    description="View on Steam. Built for users who want to support the project directly over the long term, with one exclusive dark theme, one exclusive light theme, and one exclusive Steam achievement."
+  />
+</CardGrid>
+
 ## Where to start with HagiCode
 
 If you are ready to use it for real, I recommend starting with this path:

src/content/docs/product-overview.mdx

@@ -292,6 +292,57 @@ HagiCode 里有一整套围绕英雄、职业、负载、等级进度展开的
 
 > **让 AI 开发从“问一句、回一句”升级成“理解、规划、执行、沉淀、反馈”一整条链路。**
 
+## 版本与定价
+
+如果你已经理解了 HagiCode 的产品定位，接下来最重要的问题通常就是：我应该从哪个版本开始，DLC 又会带来什么变化。
+
+下表中，`✓` 表示支持，`✗` 表示不支持。
+
+| 项目 | Desktop | Container | Steam | Hagicode Plus |
+| --- | --- | --- | --- | --- |
+| 获取入口 | [Desktop 安装](/installation/desktop) | [Container 部署](/installation/docker-compose) | [点击查看](https://store.steampowered.com/app/4625540/Hagicode/) | [点击查看](https://store.steampowered.com/app/4625540/Hagicode/) |
+| 定价 | 免费 | 免费 | 点击查看 | 点击查看 |
+| 全部免费特性 | ✓ | ✓ | ✓ | ✓ |
+| Vault | ✓ | ✓ | ✓ | ✓ |
+| Skills | ✓ | ✓ | ✓ | ✓ |
+| 提案流程 | ✓ | ✓ | ✓ | ✓ |
+| 本地成就 | ✓ | ✓ | ✓ | ✓ |
+| 全部 Agent CLI 对接支持 | ✓ | ✓ | ✓ | ✓ |
+| 语音识别支持 | ✓ | ✓ | ✓ | ✓ |
+| OmniRoute 集成 | ✓ | ✓ | ✓ | ✓ |
+| GitHub 集成 | ✓ | ✓ | ✓ | ✓ |
+| Git 管理 | ✓ | ✓ | ✓ | ✓ |
+| 最大提案并行数 | 3 | 3 | 3 | 32 |
+| 文案切换支持 | ✗ | ✗ | ✗ | ✓ |
+| Steam 云成就 | ✗ | ✗ | ✓ | ✓ |
+| 免费 DLC 支持 | ✗ | ✗ | ✓ | ✓ |
+| 创意工坊支持 | ✗ | ✗ | ✓ | ✓ |
+| 云存档支持 | ✗ | ✗ | ✓ | ✓ |
+
+**提案并行计数规则。** 免费版和 Steam 主体默认都包含 3 个提案并行上限。正在生成、正在执行、正在归档这三种状态会合并计入同一个上限。订阅 Turbo Engine DLC 后，上限会扩展到 32。
+
+**Hagicode Plus 说明。** Hagicode Plus 就是 Steam 主体版本加上 Turbo Engine DLC。换句话说，如果你看到 Hagicode Plus，可以把它理解成“Steam 版 + 更高并发与增强能力”的组合购买路径。
+
+### DLC 扩展包列表
+
+<CardGrid>
+  <LinkCard
+    title="免费 DLC · Hagicode - All Beauties Pack"
+    href="https://store.steampowered.com/app/4625540/Hagicode/"
+    description="免费。面向 Steam 用户的额外美少女内容包，包含 1000 个额外的美少女风格头像，也为后续同主题内容扩展预留空间。"
+  />
+  <LinkCard
+    title="性能 DLC · Hagicode: Turbo Engine DLC"
+    href="https://store.steampowered.com/app/4625540/Hagicode/"
+    description="点击查看。可单独购买，用来把最大提案并发数从 3 扩展到 32，同时解锁文案切换支持；官网常把“Steam 主体 + Turbo Engine DLC”作为 Hagicode Plus 对外说明。"
+  />
+  <LinkCard
+    title="赞助者 DLC · Hagicode - Sponsor Pack"
+    href="https://store.steampowered.com/app/4625540/Hagicode/"
+    description="点击查看。适合希望直接支持项目长期运行的用户，包含一套专属暗色主题、一套专属亮色主题和一个专属 Steam 成就。"
+  />
+</CardGrid>
+
 ## 从哪里开始了解 HagiCode
 
 如果你准备真正上手，建议按下面这条路径开始：