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_nvidia_sat.go

@@ -43,7 +43,7 @@ func (m model) handleNvidiaGPUsMsg(msg nvidiaGPUsMsg) (tea.Model, tea.Cmd) {
 	if msg.err != nil {
 		m.title = "NVIDIA SAT"
 		m.body = fmt.Sprintf("Failed to list GPUs: %v", msg.err)
-		m.prevScreen = screenAcceptance
+		m.prevScreen = screenHealthCheck
 		m.screen = screenOutput
 		return m, nil
 	}
@@ -90,11 +90,11 @@ func (m model) updateNvidiaSATSetup(msg tea.KeyMsg) (tea.Model, tea.Cmd) {
 		case m.nvidiaSATCursor == startIdx:
 			return m.startNvidiaSAT()
 		case m.nvidiaSATCursor == cancelIdx:
-			m.screen = screenAcceptance
+			m.screen = screenHealthCheck
 			m.cursor = 0
 		}
 	case "esc":
-		m.screen = screenAcceptance
+		m.screen = screenHealthCheck
 		m.cursor = 0
 	case "ctrl+c", "q":
 		return m, tea.Quit
@@ -173,7 +173,7 @@ func (m model) updateNvidiaSATRunning(msg tea.KeyMsg) (tea.Model, tea.Cmd) {
 			m.nvidiaSATCancel = nil
 		}
 		m.nvidiaSATAborted = true
-		m.screen = screenAcceptance
+		m.screen = screenHealthCheck
 		m.cursor = 0
 	case "ctrl+c":
 		return m, tea.Quit