Fixed color issue on the server, made the UI have better UX

internal/client/ui/core/core.go

@@ -144,7 +144,11 @@ func (m Model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 
 		case tea.KeyEnter:
 			if m.networkCreationPopup != nil {
-				return m, m.networkCreationPopup.Select()
+				cmd := m.networkCreationPopup.Select()
+				if cmd != nil {
+					m.networkCreationPopup = nil
+				}
+				return m, cmd
 			}
 
 		default:

internal/client/ui/core/networkcreation/networkcreation.go

@@ -95,9 +95,6 @@ func New() Model {
 		if strings.TrimSpace(s) == "" {
 			return errors.New("cannot be empty")
 		}
-		if strings.TrimSpace(s) != s {
-			return errors.New("no leading/trailing spaces")
-		}
 		return nil
 	}
 

internal/server/api/helpers.go

@@ -13,7 +13,7 @@ func isValidHexColor(color string) (bool, string) {
 		return false, "color must start with '#'"
 	}
 
-	for _, c := range color {
+	for _, c := range color[1:] {
 		if !strings.ContainsRune(hex, c) {
 			return false, "color must start with '#' and contain exactly 6 digits 0-9, a-f, A-F"
 		}