fix: Implement proper scrolling and sorting for Analysis calls list

internal/sip/callflow.go

@@ -153,6 +153,27 @@ func (s *CallFlowStore) GetRecentFlows(n int) []*CallFlow {
 	return flows
 }
 
+// GetSortedFlows returns all call flows sorted by StartTime (oldest first)
+func (s *CallFlowStore) GetSortedFlows() []*CallFlow {
+	flows := s.GetAllFlows()
+
+	// Sort by start time ascending (oldest first), then by CallID for stable order
+	for i := 0; i < len(flows)-1; i++ {
+		for j := i + 1; j < len(flows); j++ {
+			// Compare by StartTime first
+			if flows[i].StartTime.After(flows[j].StartTime) {
+				flows[i], flows[j] = flows[j], flows[i]
+			} else if flows[i].StartTime.Equal(flows[j].StartTime) {
+				// If same time, sort by CallID for stable order
+				if flows[i].CallID > flows[j].CallID {
+					flows[i], flows[j] = flows[j], flows[i]
+				}
+			}
+		}
+	}
+	return flows
+}
+
 // Count returns the number of call flows
 func (s *CallFlowStore) Count() int {
 	s.mu.RLock()