feat(channels): add QQ Official channel via Tencent Bot SDK

Implement QQ Official messaging channel using OAuth2 authentication
with Discord-like WebSocket gateway protocol for events.

- Add QQChannel with send/listen/health_check support
- Add QQConfig (app_id, app_secret, allowed_users)
- OAuth2 token refresh and WebSocket heartbeat management
- Message deduplication with capacity-based eviction
- Support both C2C (private) and group AT messages
- Integrate with onboard wizard, integrations registry, and channel
  list/doctor commands
- Include unit tests for user allowlist, deduplication, and config

src/channels/mod.rs

@@ -7,6 +7,7 @@ pub mod irc;
 pub mod lark;
 pub mod matrix;
 pub mod signal;
+pub mod qq;
 pub mod slack;
 pub mod telegram;
 pub mod traits;
@@ -21,6 +22,7 @@ pub use irc::IrcChannel;
 pub use lark::LarkChannel;
 pub use matrix::MatrixChannel;
 pub use signal::SignalChannel;
+pub use qq::QQChannel;
 pub use slack::SlackChannel;
 pub use telegram::TelegramChannel;
 pub use traits::Channel;
@@ -719,6 +721,7 @@ pub fn handle_command(command: crate::ChannelCommands, config: &Config) -> Resul
                 ("IRC", config.channels_config.irc.is_some()),
                 ("Lark", config.channels_config.lark.is_some()),
                 ("DingTalk", config.channels_config.dingtalk.is_some()),
+                ("QQ", config.channels_config.qq.is_some()),
             ] {
                 println!("  {} {name}", if configured { "✅" } else { "❌" });
             }
@@ -881,6 +884,17 @@ pub async fn doctor_channels(config: Config) -> Result<()> {
         ));
     }
 
+    if let Some(ref qq) = config.channels_config.qq {
+        channels.push((
+            "QQ",
+            Arc::new(QQChannel::new(
+                qq.app_id.clone(),
+                qq.app_secret.clone(),
+                qq.allowed_users.clone(),
+            )),
+        ));
+    }
+
     if channels.is_empty() {
         println!("No real-time channels configured. Run `zeroclaw onboard` first.");
         return Ok(());
@@ -1160,6 +1174,14 @@ pub async fn start_channels(config: Config) -> Result<()> {
         )));
     }
 
+    if let Some(ref qq) = config.channels_config.qq {
+        channels.push(Arc::new(QQChannel::new(
+            qq.app_id.clone(),
+            qq.app_secret.clone(),
+            qq.allowed_users.clone(),
+        )));
+    }
+
     if channels.is_empty() {
         println!("No channels configured. Run `zeroclaw onboard` to set up channels.");
         return Ok(());