feat: Prototype message-driven flow for ItemAdded

ItemAdded now uses commands, improving internal consistency and laying
the groundwork for better error handling/UI updates.

Author: maniac-en

internal/tui/app/model.go

@@ -36,6 +36,7 @@ type AppModel struct {
 	focusedView ViewName
 	keys        []key.Binding
 	help        help.Model
+	errorMsg    string
 }
 
 func (a AppModel) Init() tea.Cmd {
@@ -79,7 +80,12 @@ func (a AppModel) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 		a.focusedView = ViewName(msg.ViewName)
 		a.Views[a.focusedView].OnFocus()
 		return a, nil
+	case messages.ShowError:
+		log.Error("user operation failed", "error", msg.Message)
+		a.errorMsg = msg.Message
+		return a, nil
 	case tea.KeyMsg:
+		a.errorMsg = ""
 		switch {
 		case key.Matches(msg, keybinds.Keys.Quit):
 			return a, tea.Quit
@@ -97,6 +103,12 @@ func (a AppModel) View() string {
 	header := a.Header()
 	view := a.Views[a.focusedView].View()
 	help := a.Help()
+	
+	if a.errorMsg != "" {
+		errorBar := styles.ErrorBarStyle.Width(a.width).Render("Error: " + a.errorMsg)
+		return lipgloss.JoinVertical(lipgloss.Top, header, view, errorBar, help, footer)
+	}
+	
 	return lipgloss.JoinVertical(lipgloss.Top, header, view, help, footer)
 }
 

internal/tui/messages/messages.go

@@ -23,3 +23,9 @@ type NavigateToView struct {
 	ViewName string
 	Data     interface{}
 }
+
+type RefreshItemsList struct{}
+
+type ShowError struct {
+	Message string
+}

internal/tui/styles/app-styles.go

@@ -13,4 +13,5 @@ var (
 	TabHeadingActive   = lipgloss.NewStyle().Background(accent).Foreground(headingForeground).Width(25).AlignHorizontal(lipgloss.Center).Border(lipgloss.NormalBorder(), false, false, false, true)
 	HelpStyle          = lipgloss.NewStyle().Padding(1, 0, 1, 2)
 	AppHelpStyle       = lipgloss.NewStyle().Padding(1, 0).Foreground(helpFG)
+	ErrorBarStyle      = lipgloss.NewStyle().Background(lipgloss.Color("#FF0000")).Foreground(lipgloss.Color("#FFFFFF")).Padding(0, 1)
 )

internal/tui/views/collections-view.go

@@ -53,7 +53,18 @@ func (c CollectionsView) Update(msg tea.Msg) (ViewInterface, tea.Cmd) {
 		c.list, cmd = c.list.Update(msg)
 		cmds = append(cmds, cmd)
 	case messages.ItemAdded:
-		c.manager.Create(context.Background(), msg.Item)
+		_, err := c.manager.Create(context.Background(), msg.Item)
+		if err != nil {
+			return c, func() tea.Msg { 
+				return messages.ShowError{Message: err.Error()} 
+			}
+		}
+		return c, func() tea.Msg { 
+			return messages.RefreshItemsList{} 
+		}
+	case messages.RefreshItemsList:
+		c.list.RefreshItems()
+		return c, nil
 	case messages.ItemEdited:
 		c.manager.Update(context.Background(), msg.ItemID, msg.Item)
 	case messages.DeleteItem: