updated styling and installation steps

tui/steps/disk_sel.go

@@ -157,13 +157,27 @@ func (m DiskSelModel) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 }
 
 func (m DiskSelModel) View() string {
+	var content strings.Builder
+
 	if m.loading {
-		return styles.MainStyle.Render(styles.TitleStyle.Render("Scanning disks..."))
+		content.WriteString(styles.TitleStyle.Render("💿 Scanning Disks..."))
+		content.WriteString("\n\n")
+		content.WriteString(styles.SpinnerStyle.Render("● Detecting available storage devices..."))
+		return styles.AppStyle.Render(content.String())
 	}
 
-	s := m.list.View()
-	s += "\n" + styles.HelpStyle.Render("Use ↑/↓ to navigate, [Enter] to select disk.")
-	return s
+	content.WriteString(styles.TitleStyle.Render("💿 Select Installation Disk"))
+	content.WriteString("\n\n")
+
+	warning := "⚠️  All data on the selected disk will be erased!"
+	content.WriteString(styles.WarningBoxStyle.Render(warning))
+	content.WriteString("\n\n")
+
+	content.WriteString(m.list.View())
+	content.WriteString("\n\n")
+	content.WriteString(styles.RenderHelp("↑/↓", "Navigate", "Enter", "Select"))
+
+	return styles.AppStyle.Render(content.String())
 }
 
 func formatBytes(bytes uint64) string {