docs(readme): 补充 doctor 命令的功能一览行与使用示例（中英双语）

Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>

README.md

@@ -121,6 +121,7 @@ The official [GitLink](https://www.gitlink.org.cn) CLI tool — built for humans
 | 📊 Profile | User ability, role, major, activity, and contribution statistics |
 | 📋 PM | Sprint management, kanban boards, weekly reports |
 | 🤖 Workflow | AI-powered issue triage, PR review, release notes |
+| 🩺 Doctor | Diagnose configuration, authentication, repo context, and API connectivity |
 
 ## Installation & Quick Start
 
@@ -676,6 +677,21 @@ gitlink-cli dataset +delete-attachment --owner me --repo proj --uuid <uuid> --ye
 > published OpenAPI contract but are not yet deployed on production (they return
 > 404 there); they will work once the platform enables them.
 
+### Doctor (Self-Diagnostics)
+
+```bash
+# Run all checks: config file, config values, auth, repo context, API connectivity
+gitlink-cli doctor
+
+# Structured output for scripts / AI agents
+gitlink-cli doctor --format json
+
+# Offline mode: skip authenticated API connectivity checks
+gitlink-cli doctor --skip-network
+```
+
+Each check reports `ok` / `warning` / `error` with a fix `suggestion`. Warnings do not block usage.
+
 ### Raw API
 
 For endpoints not covered by shortcuts, use the Raw API directly:

README.zh-CN.md

@@ -120,6 +120,7 @@
 | 📊 画像 | 用户开发能力、角色定位、专业定位、近期活动、贡献热力图统计 |
 | 📋 项目管理 | Sprint 管理、看板、周报 |
 | 🤖 工作流 | AI 驱动的 Issue 分类、PR Review、Release Notes |
+| 🩺 Doctor | 一键体检配置、认证、仓库上下文与 API 连通性 |
 
 ## 安装与快速上手
 
@@ -550,6 +551,21 @@ gitlink-cli dataset +delete-attachment --owner me --repo proj --uuid <uuid> --ye
 ```
 
 > 注意：`dataset +list`（平台数据集查询）已在生产 gitlink.org.cn 验证可用。按仓库的 `+view`/`+create`/`+update` 遵循已发布的 OpenAPI 契约，但生产环境尚未部署（当前返回 404），待平台上线后即可生效。
+### 环境自诊断（Doctor）
+
+```bash
+# 运行全部检查：配置文件、配置取值、认证、仓库上下文、API 连通性
+gitlink-cli doctor
+
+# 结构化输出，适合脚本 / AI Agent 使用
+gitlink-cli doctor --format json
+
+# 离线模式：跳过需认证的 API 连通性检查
+gitlink-cli doctor --skip-network
+```
+
+每项检查返回 `ok` / `warning` / `error` 及修复建议（suggestion）；warning 不影响使用。
+
 ### Raw API
 
 Shortcuts 未覆盖的接口可通过 Raw API 直接调用：