feat(call): enhance call service with reliable message delivery and automatic cleanup

- Introduced a new method, PublishToUserOnlineReliable, to ensure critical signaling messages are reliably sent to online users.
- Updated CallService to include a cleanup mechanism for expired calls, improving resource management and user experience.
- Enhanced call acceptance logic to utilize optimistic locking for state updates, ensuring accurate call status handling across devices.
- Refactored wire generation to accommodate the new database dependency in CallService, streamlining service initialization.

internal/pkg/ws/hub.go

@@ -200,6 +200,44 @@ func (h *Hub) PublishToUserOnline(userID string, eventType string, payload inter
 	return true
 }
 
+// PublishToUserOnlineReliable 可靠地发送事件给在线用户（阻塞发送）
+// 用于重要的信令消息（如 SDP, ICE candidate），确保消息送达
+// 如果用户不在线，返回 false
+func (h *Hub) PublishToUserOnlineReliable(userID string, eventType string, payload interface{}) bool {
+	h.mu.RLock()
+	targets := make([]*Client, 0, len(h.clients[userID]))
+	for _, c := range h.clients[userID] {
+		targets = append(targets, c)
+	}
+	h.mu.RUnlock()
+
+	if len(targets) == 0 {
+		return false
+	}
+
+	msg := ResponseMessage{
+		EventID: h.NextID(),
+		Type:    eventType,
+		TS:      time.Now().UnixMilli(),
+		Payload: payload,
+	}
+	data, err := json.Marshal(msg)
+	if err != nil {
+		return false
+	}
+
+	// 阻塞发送，确保消息送达
+	for _, c := range targets {
+		select {
+		case <-c.Quit:
+			// 客户端已断开，跳过
+		case c.Send <- data:
+			// 消息已发送
+		}
+	}
+	return true
+}
+
 // publish 内部发布方法
 func (h *Hub) publish(userID string, ev Event) {
 	h.mu.Lock()