feat: CPU SAT via stress-ng + BMC version via ipmitool

BMC:
- collector/board.go: collectBMCFirmware() via ipmitool mc info, graceful skip if /dev/ipmi0 absent
- collector/collector.go: append BMC firmware record to snap.Firmware
- app/panel.go: show BMC version in TUI right-panel header alongside BIOS

CPU SAT:
- platform/sat.go: RunCPUAcceptancePack(baseDir, durationSec) — lscpu + sensors before/after + stress-ng
- app/app.go: RunCPUAcceptancePack + RunCPUAcceptancePackResult methods, satRunner interface updated
- app/panel.go: CPU row now reads real PASS/FAIL from cpu-*/summary.txt via satStatuses(); cpuDetailResult shows last SAT summary + audit data
- tui/types.go: actionRunCPUSAT, confirmBody for CPU test with mode label
- tui/screen_health_check.go: hcCPUDurations [60,300,900]s; hcRunSingle(CPU)→confirm screen; executeRunAll uses RunCPUAcceptancePackResult
- tui/forms.go: actionRunCPUSAT → RunCPUAcceptancePackResult with mode duration
- cmd/bee/main.go: bee sat cpu [--duration N] subcommand

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

audit/internal/app/panel.go

@@ -45,7 +45,9 @@ func (a *App) LoadHardwarePanel() HardwarePanelData {
 	for _, fw := range snap.Hardware.Firmware {
 		if fw.DeviceName == "BIOS" && fw.Version != "" {
 			header = append(header, "BIOS: "+fw.Version)
-			break
+		}
+		if fw.DeviceName == "BMC" && fw.Version != "" {
+			header = append(header, "BMC:  "+fw.Version)
 		}
 	}
 	if ip := formatIPLine(a.network.ListInterfaces); ip != "" {
@@ -57,7 +59,7 @@ func (a *App) LoadHardwarePanel() HardwarePanelData {
 	if cpu := formatCPULine(snap.Hardware.CPUs); cpu != "" {
 		rows = append(rows, ComponentRow{
 			Key:    "CPU",
-			Status: "N/A",
+			Status: statuses["cpu"],
 			Detail: strings.TrimPrefix(cpu, "CPU: "),
 		})
 	}
@@ -97,7 +99,7 @@ func (a *App) LoadHardwarePanel() HardwarePanelData {
 func (a *App) ComponentDetailResult(key string) ActionResult {
 	switch key {
 	case "CPU":
-		return a.cpuDetailResult()
+		return a.cpuDetailResult(false)
 	case "MEM":
 		return a.satDetailResult("memory", "memory-", "MEM detail")
 	case "GPU":
@@ -111,19 +113,37 @@ func (a *App) ComponentDetailResult(key string) ActionResult {
 	}
 }
 
-func (a *App) cpuDetailResult() ActionResult {
+func (a *App) cpuDetailResult(satOnly bool) ActionResult {
+	var b strings.Builder
+
+	// Show latest SAT summary if available.
+	satResult := a.satDetailResult("cpu", "cpu-", "CPU SAT")
+	if satResult.Body != "No test results found. Run a test first." {
+		fmt.Fprintln(&b, "=== Last SAT ===")
+		fmt.Fprintln(&b, satResult.Body)
+		fmt.Fprintln(&b)
+	}
+
+	if satOnly {
+		body := strings.TrimSpace(b.String())
+		if body == "" {
+			body = "No CPU SAT results found. Run a test first."
+		}
+		return ActionResult{Title: "CPU SAT", Body: body}
+	}
+
 	raw, err := os.ReadFile(DefaultAuditJSONPath)
 	if err != nil {
-		return ActionResult{Title: "CPU", Body: "No audit data."}
+		return ActionResult{Title: "CPU", Body: strings.TrimSpace(b.String())}
 	}
 	var snap schema.HardwareIngestRequest
 	if err := json.Unmarshal(raw, &snap); err != nil {
-		return ActionResult{Title: "CPU", Body: "Audit data unreadable."}
+		return ActionResult{Title: "CPU", Body: strings.TrimSpace(b.String())}
 	}
 	if len(snap.Hardware.CPUs) == 0 {
-		return ActionResult{Title: "CPU", Body: "No CPU data in last audit."}
+		return ActionResult{Title: "CPU", Body: strings.TrimSpace(b.String())}
 	}
-	var b strings.Builder
+	fmt.Fprintln(&b, "=== Audit ===")
 	for i, cpu := range snap.Hardware.CPUs {
 		fmt.Fprintf(&b, "CPU %d\n", i)
 		if cpu.Model != nil {
@@ -220,6 +240,7 @@ func satStatuses() map[string]string {
 		"gpu":     "N/A",
 		"memory":  "N/A",
 		"storage": "N/A",
+		"cpu":     "N/A",
 	}
 	patterns := []struct {
 		key    string
@@ -228,6 +249,7 @@ func satStatuses() map[string]string {
 		{"gpu", "gpu-nvidia-"},
 		{"memory", "memory-"},
 		{"storage", "storage-"},
+		{"cpu", "cpu-"},
 	}
 	for _, item := range patterns {
 		matches, err := filepath.Glob(filepath.Join(DefaultSATBaseDir, item.prefix+"*/summary.txt"))