Improve empty state messages with actionable guidance

internal/tui/screens/list.go

@@ -136,11 +136,6 @@ func (s *ListScreen) Update(msg tea.Msg) (Screen, tea.Cmd) {
 }
 
 // View renders the list screen
-	// Breadcrumb: Home
-	breadcrumb := components.RenderBreadcrumb([]components.BreadcrumbItem{
-		{Label: "Clients", ID: "list"},
-	})
-
 func (s *ListScreen) View() string {
 	if len(s.clients) == 0 {
 		// Empty state with helpful guidance
@@ -411,7 +406,7 @@ type clientsLoadedMsg struct {
 	clients []ClientWithStatus
 }
 
-// errMsg is sent when an error occurs
-type errMsg struct {
-	err error
+// ErrMsg is sent when an error occurs
+type ErrMsg struct {
+	Err error
 }