feat(webui): replace TUI with full web UI + local openbox desktop

- Remove audit/internal/tui/ (~3000 LOC, bubbletea/lipgloss/reanimator deps)
- Add /api/* REST+SSE endpoints: audit, SAT (nvidia/memory/storage/cpu),
  services, network, export, tools, live metrics stream
- Add async job manager with SSE streaming for long-running operations
- Add platform.SampleLiveMetrics() for live fan/temp/power/GPU polling
- Add multi-page web UI (vanilla JS): Dashboard, Metrics charts, Tests,
  Burn-in, Network, Services, Export, Tools
- Add bee-desktop.service: openbox + Xorg + Chromium opening http://localhost/
- Add openbox/tint2/xorg/xinit/xterm/chromium to ISO package list
- Update .profile, bee.sh, and bible-local docs

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

audit/internal/platform/live_metrics.go

@@ -0,0 +1,45 @@
+package platform
+
+import "time"
+
+// LiveMetricSample is a single point-in-time snapshot of server metrics
+// collected for the web UI metrics page.
+type LiveMetricSample struct {
+	Timestamp time.Time       `json:"ts"`
+	Fans      []FanReading    `json:"fans"`
+	Temps     []TempReading   `json:"temps"`
+	PowerW    float64         `json:"power_w"`
+	GPUs      []GPUMetricRow  `json:"gpus"`
+}
+
+// TempReading is a named temperature sensor value.
+type TempReading struct {
+	Name    string  `json:"name"`
+	Celsius float64 `json:"celsius"`
+}
+
+// SampleLiveMetrics collects a single metrics snapshot from all available
+// sources: GPU (via nvidia-smi), fans and temperatures (via ipmitool/sensors),
+// and system power (via ipmitool dcmi). Missing sources are silently skipped.
+func SampleLiveMetrics() LiveMetricSample {
+	s := LiveMetricSample{Timestamp: time.Now().UTC()}
+
+	// GPU metrics — skipped silently if nvidia-smi unavailable
+	gpus, _ := SampleGPUMetrics(nil)
+	s.GPUs = gpus
+
+	// Fan speeds — skipped silently if ipmitool unavailable
+	fans, _ := sampleFanSpeeds()
+	s.Fans = fans
+
+	// CPU/system temperature — returns 0 if unavailable
+	cpuTemp := sampleCPUMaxTemp()
+	if cpuTemp > 0 {
+		s.Temps = append(s.Temps, TempReading{Name: "CPU", Celsius: cpuTemp})
+	}
+
+	// System power — returns 0 if unavailable
+	s.PowerW = sampleSystemPower()
+
+	return s
+}