feat: sync recent call and channel fixes

internal/app/phone/registry.go

@@ -83,11 +83,16 @@ func (r *registry) decActiveLocked(userID int64) {
 
 // markDiscardedLocked 把非终态 entry 迁入终态并更新并发计数。
 func (r *registry) markDiscardedLocked(e *entry, reason domain.PhoneCallDiscardReason, duration, nowUnix int) {
+	r.markDiscardedWithSlugLocked(e, reason, "", duration, nowUnix)
+}
+
+func (r *registry) markDiscardedWithSlugLocked(e *entry, reason domain.PhoneCallDiscardReason, reasonSlug string, duration, nowUnix int) {
 	if e.call.Terminal() {
 		return
 	}
 	e.call.State = domain.PhoneCallStateDiscarded
 	e.call.DiscardReason = reason
+	e.call.DiscardReasonSlug = reasonSlug
 	e.call.Duration = duration
 	e.call.DiscardedAt = nowUnix
 	r.decActiveLocked(e.call.AdminID)

internal/app/phone/service.go

@@ -252,6 +252,10 @@ func (s *Service) ConfirmCall(ctx context.Context, userID, callID, accessHash in
 // DiscardCall 挂断：任意非终态可达，幂等。already=true 表示通话此前已是终态
 // （双方同时挂断：先到者定 reason，后到者拿快照）。
 func (s *Service) DiscardCall(ctx context.Context, userID, callID, accessHash int64, reason domain.PhoneCallDiscardReason, duration int) (domain.PhoneCall, bool, error) {
+	return s.DiscardCallWithSlug(ctx, userID, callID, accessHash, reason, "", duration)
+}
+
+func (s *Service) DiscardCallWithSlug(ctx context.Context, userID, callID, accessHash int64, reason domain.PhoneCallDiscardReason, reasonSlug string, duration int) (domain.PhoneCall, bool, error) {
 	s.reg.mu.Lock()
 	defer s.reg.mu.Unlock()
 	e, err := s.lookupLocked(callID, accessHash)
@@ -267,11 +271,14 @@ func (s *Service) DiscardCall(ctx context.Context, userID, callID, accessHash in
 	if reason == "" {
 		reason = domain.PhoneCallDiscardReasonHangup
 	}
+	if reason != domain.PhoneCallDiscardReasonMigrateConference {
+		reasonSlug = ""
+	}
 	// duration 只在通话真正建立（Confirmed）后才认，防止客户端把振铃时长报成通话时长。
 	if e.call.StartDate == 0 || duration < 0 {
 		duration = 0
 	}
-	s.reg.markDiscardedLocked(e, reason, duration, int(s.clk.Now().Unix()))
+	s.reg.markDiscardedWithSlugLocked(e, reason, reasonSlug, duration, int(s.clk.Now().Unix()))
 	return e.call, false, nil
 }