fix: Refactor Update loop to ensure packets are processed in all views

internal/tui/model.go

@@ -299,11 +299,61 @@ type ErrorMsg struct {
 
 // Update handles messages and updates the model
 func (m Model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
-	var cmd tea.Cmd
+	var cmds []tea.Cmd
 
-	// Handle subview updates first
+	// GLOBAL HANDLERS: Handle signals independent of view
+	switch msg := msg.(type) {
+	case PacketMsg:
+		if msg.Packet != nil {
+			m.packetCount++
+			summary := formatPacketSummary(msg.Packet, m.networkMap)
+			m.lastPackets = append(m.lastPackets, summary)
+			if len(m.lastPackets) > 50 {
+				m.lastPackets = m.lastPackets[1:]
+			}
+			m.callFlowStore.AddPacket(msg.Packet)
+
+			// If we are in Call Detail view, we might need to update the viewport content dynamically!
+			if m.subView == SubViewCallDetail {
+				// Re-render subview content effectively updates the strings, but
+				// we need to set the content on viewport again if it changed.
+				// This is handled in View() normally, but viewport needs SetContent.
+				// Let's force a viewport update by triggering a dummy message or just re-setting it.
+				// Actually, View() calls renderCallDetail which calls SetContent.
+				// But View() is only called if Update returns a modified model.
+				// We modified the store, so that counts.
+			}
+		}
+
+		// PROCESS NEXT PACKET - CRITICAL loop
+		if m.capturing {
+			cmds = append(cmds, waitForPacket(m.packetChan))
+		}
+
+		// If we processed a packet, we typically don't need to pass this msg to subviews
+		// UNLESS the subview reacts to it explicitly.
+		// For now, we return here to avoid double processing, BUT we must ensure
+		// UI refreshes.
+		return m, tea.Batch(cmds...)
+
+	case ErrorMsg:
+		m.captureError = msg.Error.Error()
+		return m, nil
+	}
+
+	// Handle standard key/window messages dependent on view
+	// Handle subview updates
 	if m.subView != SubViewNone {
-		return m.updateSubView(msg)
+		newM, cmd := m.updateSubView(msg)
+		// We need to type assert back to Model because updateSubView follows the interface but returns concrete logic
+		// Actually updateSubView returns tea.Model, tea.Cmd.
+		// Since we are inside Model.Update, we can cast or just return.
+		realM, ok := newM.(Model)
+		if ok {
+			m = realM
+		}
+		cmds = append(cmds, cmd)
+		return m, tea.Batch(cmds...)
 	}
 
 	switch msg := msg.(type) {
@@ -321,7 +371,7 @@ func (m Model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 		case "4":
 			m.currentView = ViewNetworkMap
 		default:
-			cmd = m.handleViewKeys(msg)
+			cmds = append(cmds, m.handleViewKeys(msg))
 		}
 
 	case tea.WindowSizeMsg:
@@ -342,28 +392,9 @@ func (m Model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 
 		m.viewport.Width = m.width / 2 // Right pane width
 		m.viewport.Height = contentHeight
-
-	case PacketMsg:
-		if msg.Packet != nil {
-			m.packetCount++
-			summary := formatPacketSummary(msg.Packet, m.networkMap)
-			m.lastPackets = append(m.lastPackets, summary)
-			if len(m.lastPackets) > 50 {
-				m.lastPackets = m.lastPackets[1:]
-			}
-			m.callFlowStore.AddPacket(msg.Packet)
-		}
-
-		// Continue waiting if we are still capturing
-		if m.capturing {
-			return m, waitForPacket(m.packetChan)
-		}
-
-	case ErrorMsg:
-		m.captureError = msg.Error.Error()
 	}
 
-	return m, cmd
+	return m, tea.Batch(cmds...)
 }
 
 func (m *Model) handleViewKeys(msg tea.KeyMsg) tea.Cmd {