docs: add VK channel to documentation and update voice support

- Add VK channel to README.md and README.zh.md channel lists
- Update VK channel documentation with voice message support
- Document ASR and TTS capabilities for VK channel
- Add voice transcription configuration reference

README.md

@@ -454,7 +454,7 @@ For full provider configuration details, see [Providers & Models](docs/providers
 
 ## 💬 Channels (Chat Apps)
 
-Talk to your PicoClaw through 17+ messaging platforms:
+Talk to your PicoClaw through 18+ messaging platforms:
 
 | Channel | Setup | Protocol | Docs |
 |---------|-------|----------|------|
@@ -469,6 +469,7 @@ Talk to your PicoClaw through 17+ messaging platforms:
 | **Feishu / Lark** | Medium (App ID + Secret) | WebSocket/SDK | [Guide](docs/channels/feishu/README.md) |
 | **LINE** | Medium (credentials + webhook) | Webhook | [Guide](docs/channels/line/README.md) |
 | **WeCom** | Easy (QR login or manual) | WebSocket | [Guide](docs/channels/wecom/README.md) |
+| **VK** | Easy (group token) | Long Poll | [Guide](docs/channels/vk/README.md) |
 | **IRC** | Medium (server + nick) | IRC protocol | [Guide](docs/chat-apps.md#irc) |
 | **OneBot** | Medium (WebSocket URL) | OneBot v11 | [Guide](docs/channels/onebot/README.md) |
 | **MaixCam** | Easy (enable) | TCP socket | [Guide](docs/channels/maixcam/README.md) |

README.zh.md

@@ -448,7 +448,7 @@ PicoClaw 通过 `model_list` 配置支持 30+ LLM Provider，使用 `协议/模
 
 ## 💬 Channels（聊天应用）
 
-通过 17+ 消息平台与你的 PicoClaw 对话：
+通过 18+ 消息平台与你的 PicoClaw 对话：
 
 | Channel | 配置难度 | 协议 | 文档 |
 |---------|----------|------|------|
@@ -463,6 +463,7 @@ PicoClaw 通过 `model_list` 配置支持 30+ LLM Provider，使用 `协议/模
 | **飞书 / Lark** | 中等（App ID + Secret） | WebSocket/SDK | [指南](docs/channels/feishu/README.zh.md) |
 | **LINE** | 中等（credentials + webhook） | Webhook | [指南](docs/channels/line/README.zh.md) |
 | **企业微信** | 简单（扫码登录或手动配置） | WebSocket | [指南](docs/channels/wecom/README.zh.md) |
+| **VK** | 简单（群组 token） | Long Poll | [指南](docs/channels/vk/README.md) |
 | **IRC** | 中等（server + nick） | IRC 协议 | [指南](docs/zh/chat-apps.md#irc) |
 | **OneBot** | 中等（WebSocket URL） | OneBot v11 | [指南](docs/channels/onebot/README.zh.md) |
 | **MaixCam** | 简单（启用即可） | TCP socket | [指南](docs/channels/maixcam/README.zh.md) |

docs/channels/vk/README.md

@@ -89,9 +89,19 @@ export PICOCLAW_CHANNELS_VK_TOKEN="vk1.a.abc123..."
 - **Photos**: Photos are displayed as `[photo]` placeholder
 - **Videos**: Videos are displayed as `[video]` placeholder
 - **Audio**: Audio files are displayed as `[audio]` placeholder
+- **Voice messages**: Voice messages are displayed as `[voice]` placeholder and support transcription
 - **Documents**: Documents are displayed as `[document: filename]`
 - **Stickers**: Stickers are displayed as `[sticker]` placeholder
 
+### Voice Support
+
+The VK channel supports both voice message reception and text-to-speech capabilities:
+
+- **ASR (Automatic Speech Recognition)**: Voice messages can be transcribed to text using configured voice models
+- **TTS (Text-to-Speech)**: Text responses can be converted to voice messages
+
+To enable voice transcription, configure a voice model in your providers setup. See [Voice Transcription](../../providers.md#voice-transcription) for details.
+
 ### Group Chat Support
 
 The VK channel supports group chats with configurable triggers: