iso: improve burn-in, export, and live boot

audit/internal/tui/update.go

@@ -101,6 +101,13 @@ func (m model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 			m.screen = screenOutput
 			return m, m.refreshSnapshotCmd()
 		}
+		if len(msg.targets) == 0 {
+			m.title = "Export support bundle"
+			m.body = "No writable removable filesystems found.\n\nRead-only or boot media are hidden from this list."
+			m.prevScreen = screenMain
+			m.screen = screenOutput
+			return m, m.refreshSnapshotCmd()
+		}
 		m.targets = msg.targets
 		m.screen = screenExportTargets
 		m.cursor = 0
@@ -117,7 +124,7 @@ func (m model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 			m.gpuStressCancel()
 			m.gpuStressCancel = nil
 		}
-		m.prevScreen = screenHealthCheck
+		m.prevScreen = screenBurnInTests
 		m.screen = screenOutput
 		m.title = msg.title
 		if msg.err != nil {
@@ -179,6 +186,8 @@ func (m model) updateKey(msg tea.KeyMsg) (tea.Model, tea.Cmd) {
 		return m.updateMain(msg)
 	case screenHealthCheck:
 		return m.updateHealthCheck(msg)
+	case screenBurnInTests:
+		return m.updateBurnInTests(msg)
 	case screenSettings:
 		return m.updateMenu(msg, len(m.settingsMenu), m.handleSettingsMenu)
 	case screenNetwork: