diff --git a/AGENTS.md b/AGENTS.md
index e89dd93..925957c 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -114,7 +114,7 @@ npm run lint          # ESLint
 - **KV namespace**: Required binding for token/state/config/session storage
 - **D1 database**: Binding `DB` (database `webhooker`, id `214a0104-3235-47c0-b7bf-ddda95f3c8ac`) for `send_logs` + `discord_links` + `telegram_links` tables
 - **Discord**: `DISCORD_PUBLIC_KEY` (Interactions Endpoint signature verification, from Discord Developer Portal) and `DISCORD_APPLICATION_ID` (optional, auto-resolved via `GET /oauth2/applications/@me` when omitted) are required for interactions
-- **Telegram**: `TELEGRAM_TOKEN` (Bot API token from BotFather) required for Telegram routes; `TELEGRAM_WEBHOOK_SECRET` (optional secret token for `POST /telegram/webhook` verification)
+- **Telegram**: `TELEGRAM_TOKEN` (Bot API token from BotFather) required for Telegram routes; `TELEGRAM_WEBHOOK_SECRET` (optional secret token for `POST /telegram/webhook` verification); avatars are sent as a link-preview card via the built-in `GET /api/richheader` (overridable with `TELEGRAM_RICH_HEADER_HOST`)
 
 ## Deployment
 
diff --git a/docs/api/overview.md b/docs/api/overview.md
index 789ff09..f4de420 100644
--- a/docs/api/overview.md
+++ b/docs/api/overview.md
@@ -16,6 +16,7 @@ https://your-worker.workers.dev
 | `POST`   | `/webhook`                     | HMAC signature    | GitHub webhook ingestion                               |
 | `POST`   | `/discord/interactions`        | Ed25519 signature | Discord interactions (slash commands, buttons, modals) |
 | `POST`   | `/telegram/webhook`            | Secret token      | Telegram updates (bot `/gh` commands)                  |
+| `GET`    | `/api/richheader`              | None              | Open Graph page for the Telegram avatar link-preview card |
 | `GET`    | `/auth/github`                 | None              | Start GitHub OAuth flow                                |
 | `GET`    | `/auth/github/callback`        | None              | OAuth callback                                         |
 | `DELETE` | `/auth/token/:userId`          | None              | Revoke user token                                      |
diff --git a/docs/guide/configuration.md b/docs/guide/configuration.md
index ff577c0..536faa4 100644
--- a/docs/guide/configuration.md
+++ b/docs/guide/configuration.md
@@ -23,6 +23,7 @@ WebHooker requires several secrets to function. For local development, store the
 | `DISCORD_PUBLIC_KEY`      | Discord application public key (Developer Portal) — required for interactions            | Unset → interactions return `401` |
 | `DISCORD_APPLICATION_ID`  | Discord application id; auto-resolved when omitted                                       | Auto-resolved                     |
 | `TELEGRAM_WEBHOOK_SECRET` | Secret token for `POST /telegram/webhook` verification (X-Telegram-Bot-Api-Secret-Token) | Disabled (no verification)        |
+| `TELEGRAM_RICH_HEADER_HOST` | Base URL of an external rich-header service; when unset, the built-in `GET /api/richheader` serves the Telegram avatar card | Built-in `/api/richheader`        |
 | `BASE_URL`                | Public URL for OAuth callbacks                                                           | `http://localhost:8787`           |
 | `ADMIN_USER_IDS`          | Comma-separated GitHub user IDs (or logins) allowed to access the Web UI                 | Disabled                          |
 
diff --git a/docs/zh/api/overview.md b/docs/zh/api/overview.md
index 4d09cc9..8931844 100644
--- a/docs/zh/api/overview.md
+++ b/docs/zh/api/overview.md
@@ -16,6 +16,7 @@ https://your-worker.workers.dev
 | `POST`   | `/webhook`                     | HMAC 签名    | GitHub webhook 接入                   |
 | `POST`   | `/discord/interactions`        | Ed25519 签名 | Discord 交互（斜杠命令、按钮、modal） |
 | `POST`   | `/telegram/webhook`            | Secret token | Telegram 更新（bot `/gh` 命令）       |
+| `GET`    | `/api/richheader`              | 无           | 用于 Telegram 头像链接预览卡片的 Open Graph 页面 |
 | `GET`    | `/auth/github`                 | 无           | 启动 GitHub OAuth 流程                |
 | `GET`    | `/auth/github/callback`        | 无           | OAuth 回调                            |
 | `DELETE` | `/auth/token/:userId`          | 无           | 撤销用户 Token                        |
diff --git a/docs/zh/guide/configuration.md b/docs/zh/guide/configuration.md
index f0b5d25..f53f926 100644
--- a/docs/zh/guide/configuration.md
+++ b/docs/zh/guide/configuration.md
@@ -25,6 +25,7 @@ WebHooker 需要多个密钥才能运行。本地开发时存储在 `.dev.vars`
 | `DISCORD_PUBLIC_KEY`      | Discord 应用的公钥（开发者门户获取），交互功能必需                   | 未设置时交互返回 401    |
 | `DISCORD_APPLICATION_ID`  | Discord 应用 ID；省略时自动获取                                      | 自动获取                |
 | `TELEGRAM_WEBHOOK_SECRET` | `POST /telegram/webhook` 验签密钥（X-Telegram-Bot-Api-Secret-Token） | 未设置时不校验          |
+| `TELEGRAM_RICH_HEADER_HOST` | 外部 rich-header 服务的基础 URL；未设置时使用内置的 `GET /api/richheader` 生成 Telegram 头像卡片 | 内置 `/api/richheader`  |
 
 ## Web 控制台
 
diff --git a/src/lib/locales/en.ts b/src/lib/locales/en.ts
index 7b56ec2..4c3178f 100644
--- a/src/lib/locales/en.ts
+++ b/src/lib/locales/en.ts
@@ -48,6 +48,8 @@ export const en = {
     status: "Status",
     run: "Run",
     job: "Job",
+    workflow: "Workflow",
+    context: "Context",
     duration: "Duration",
     type: "Type",
     name: "Name",