docs: move README architecture sections earlier

Author: RyanLee-Dev

README.md

@@ -21,6 +21,19 @@ OpenAgentCore runs AI agents on your own infrastructure behind the OpenAI Agents
 - **Your choice of machine.** Agents work in a managed sandbox (Docker, microsandbox or E2B), or on your own Linux, macOS or Windows machine.
 - **Every part is replaceable.** Sandboxes, harnesses and model providers plug in through defined protocols.
 
+## How it fits together
+
+![OpenAgentCore architecture](docs/assets/architecture.png)
+
+Applications and operators use these Core APIs:
+
+| API | Path | Used by |
+| --- | --- | --- |
+| **[Agents API](docs/api/public-agent-api.md)** | `/v1` | Your applications. Same protocol as [OpenAI's Agents API](https://developers.openai.com/api/docs/guides/agents-api/overview) |
+| **[Core API](contracts/agents-api/admin-api.md)** | `/core/v1` | Operators, through Web |
+
+Core keeps durable execution state. The Runtime runs the chosen harness inside the Environment. Each connection is a defined protocol, so any part can be replaced on its own. See the [architecture guide](docs/architecture.md).
+
 ## Screenshots
 
 | Overview | Agent metrics |
@@ -44,19 +57,6 @@ Then:
 
 The [installation guide](docs/getting-started/install.md) covers each step, HTTPS and a quick local trial. Listen addresses, ports and other options: [installation options](docs/getting-started/install-options.md).
 
-## How it fits together
-
-![OpenAgentCore architecture](docs/assets/architecture.png)
-
-Applications and operators use these Core APIs:
-
-| API | Path | Used by |
-| --- | --- | --- |
-| **[Agents API](docs/api/public-agent-api.md)** | `/v1` | Your applications. Same protocol as [OpenAI's Agents API](https://developers.openai.com/api/docs/guides/agents-api/overview) |
-| **[Core API](contracts/agents-api/admin-api.md)** | `/core/v1` | Operators, through Web |
-
-Core keeps durable execution state. The Runtime runs the chosen harness inside the Environment. Each connection is a defined protocol, so any part can be replaced on its own. See the [architecture guide](docs/architecture.md).
-
 ## Documentation
 
 | I want to | Start with |

README.zh-CN.md

@@ -12,6 +12,19 @@ OpenAI Agents API 的开源实现，支持多种原生执行引擎，可部署
 
 </div>
 
+## 组件关系
+
+![OpenAgentCore 架构](docs/assets/architecture.png)
+
+应用和管理员使用以下 Core API：
+
+| API | 路径 | 调用方 |
+| --- | --- | --- |
+| **[Agents API](docs/api/public-agent-api.md)** | `/v1` | 你的应用，与 [OpenAI 的 Agents API](https://developers.openai.com/api/docs/guides/agents-api/overview) 协议一致 |
+| **[Core API](contracts/agents-api/admin-api.md)** | `/core/v1` | 管理员，通过 Web 调用 |
+
+持久化执行状态由 Core 保存；Runtime 在 Environment 中运行所选 Harness。各部件之间都通过既定协议连接， 任何一个都可以单独替换。详见[架构说明](docs/architecture.md)。
+
 ## 这是什么
 
 OpenAgentCore 在你自己的基础设施上运行 AI Agent，对外提供 OpenAI Agents API。
@@ -44,19 +57,6 @@ curl -fsSL https://github.com/MiniMax-AI/OpenAgentCore/releases/latest/download/
 
 [安装指南](docs/getting-started/install.md)详细介绍每一步，以及 HTTPS 配置和本地快速试用。监听地址、端口等参数见[安装配置选项](docs/getting-started/install-options.md)。
 
-## 组件关系
-
-![OpenAgentCore 架构](docs/assets/architecture.png)
-
-应用和管理员使用以下 Core API：
-
-| API | 路径 | 调用方 |
-| --- | --- | --- |
-| **[Agents API](docs/api/public-agent-api.md)** | `/v1` | 你的应用，与 [OpenAI 的 Agents API](https://developers.openai.com/api/docs/guides/agents-api/overview) 协议一致 |
-| **[Core API](contracts/agents-api/admin-api.md)** | `/core/v1` | 管理员，通过 Web 调用 |
-
-持久化执行状态由 Core 保存；Runtime 在 Environment 中运行所选 Harness。各部件之间都通过既定协议连接， 任何一个都可以单独替换。详见[架构说明](docs/architecture.md)。
-
 ## 文档
 
 | 我想要 | 从这里开始 |