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>

iso/overlay/usr/local/bin/bee-openbox-session

@@ -0,0 +1,25 @@
+#!/bin/sh
+# openbox session: launch tint2 taskbar + chromium, then openbox as WM.
+# This file is used as an xinitrc by bee-desktop.
+
+# Wait for bee-web to be accepting connections (up to 15 seconds)
+i=0
+while [ $i -lt 15 ]; do
+    if curl -sf http://localhost/healthz >/dev/null 2>&1; then
+        break
+    fi
+    sleep 1
+    i=$((i+1))
+done
+
+tint2 &
+chromium \
+    --no-sandbox \
+    --disable-infobars \
+    --disable-translate \
+    --no-first-run \
+    --disable-session-crashed-bubble \
+    --disable-features=TranslateUI \
+    http://localhost/ &
+
+exec openbox