feat(tui): rebuild TUI around hardware diagnostics (Health Check + two-column layout)

- Replace 12-item flat menu with 4-item main menu: Health Check, Export support bundle, Settings, Exit
- Add Health Check screen (Lenovo-style): per-component checkboxes (GPU/MEM/DISK/CPU), Quick/Standard/Express modes, Run All, letter hotkeys G/M/S/C/R/A/1/2/3
- Add two-column main screen: left = menu, right = hardware panel with colored PASS/FAIL/CANCEL/N/A status per component; Tab/→ switches focus, Enter opens component detail
- Add app.LoadHardwarePanel() + ComponentDetailResult() reading audit JSON and SAT summary.txt files
- Move Network/Services/audit actions into Settings submenu
- Export: support bundle only (remove separate audit JSON export)
- Delete screen_acceptance.go; add screen_health_check.go, screen_settings.go, app/panel.go
- Add BMC + CPU stress-ng tests to backlog
- Update bible submodule
- Rewrite tui_test.go for new screen/action structure

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

audit/internal/tui/screen_export.go

@@ -4,17 +4,11 @@ import tea "github.com/charmbracelet/bubbletea"
 
 func (m model) handleExportTargetsMenu() (tea.Model, tea.Cmd) {
 	if len(m.targets) == 0 {
-		title := "Export audit"
-		if m.pendingAction == actionExportBundle {
-			title = "Export support bundle"
-		}
-		return m, resultCmd(title, "No removable filesystems found", nil, screenMain)
+		return m, resultCmd("Export support bundle", "No removable filesystems found", nil, screenMain)
 	}
 	target := m.targets[m.cursor]
 	m.selectedTarget = &target
-	if m.pendingAction == actionNone {
-		m.pendingAction = actionExportAudit
-	}
+	m.pendingAction = actionExportBundle
 	m.screen = screenConfirm
 	return m, nil
 }