feat: v3.4 — boot reliability, log readability, USB export, screen resolution, GRUB UEFI fix, memtest, KVM console stability

Web UI / logs:
- Strip ANSI escape codes and handle \r (progress bars) in task log output
- Add USB export API + UI card on Export page (list removable devices, write audit JSON or support bundle)
- Add Display Resolution card in Tools (xrandr-based, per-output mode selector)
- Dashboard: audit status banner with auto-reload when audit task completes

Boot & install:
- bee-web starts immediately with no dependencies (was blocked by audit + network)
- bee-audit.service redesigned: waits for bee-web healthz, sleeps 60s, enqueues audit via /api/audit/run (task system)
- bee-install: fix GRUB UEFI — grub-install exit code was silently ignored (|| true); add --no-nvram fallback; always copy EFI/BOOT/BOOTX64.EFI fallback path
- Add grub-efi-amd64, grub-pc, grub-efi-amd64-signed, shim-signed to package list (grub-install requires these, not just -bin variants)
- memtest hook: fix binary/boot/ not created before cp; handle both Debian (no extension) and upstream (x64.efi) naming
- bee-openbox-session: increase healthz wait from 30s to 120s

KVM console stability:
- runCmdJob: syscall.Setpriority(PRIO_PROCESS, pid, 10) on all stress subprocesses
- lightdm.service.d: Nice=-5 so X server preempts stress processes

Packages: add btop

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

iso/overlay/etc/systemd/system/bee-audit.service

@@ -1,14 +1,25 @@
 [Unit]
-Description=Bee: run hardware audit
-After=bee-network.service bee-nvidia.service bee-preflight.service
-Before=bee-web.service
+Description=Bee: schedule startup hardware audit via task queue
+# Start AFTER bee-web, not before — bee-web must not wait for audit.
+After=bee-web.service
+Wants=bee-web.service
 
 [Service]
 Type=oneshot
-ExecStart=/usr/local/bin/bee-log-run /appdata/bee/export/bee-audit.log /bin/sh -c '/usr/local/bin/bee audit --runtime livecd --output file:/appdata/bee/export/bee-audit.json; rc=$?; if [ "$rc" -ne 0 ]; then echo "[bee-audit] WARN: audit exited with rc=$rc"; fi; exit 0'
+RemainAfterExit=yes
+# Wait up to 90s for bee-web to respond on /healthz, then sleep 60s for
+# the system to settle (GPU drivers, sensors), then enqueue the audit as
+# a background task so it appears in the task list and logs.
+ExecStart=/bin/sh -c '\
+  i=0; \
+  while [ $i -lt 90 ]; do \
+    if curl -sf http://localhost/healthz >/dev/null 2>&1; then break; fi; \
+    sleep 1; i=$((i+1)); \
+  done; \
+  sleep 60; \
+  curl -sf -X POST http://localhost/api/audit/run >/dev/null'
 StandardOutput=journal
 StandardError=journal
-RemainAfterExit=yes
 
 [Install]
 WantedBy=multi-user.target