Add nvidia-bug-report.sh to ISO and fix GPU diagnostic pack in bee-tui

- build-nvidia-module.sh: extract nvidia-bug-report.sh from .run installer
- build.sh: copy nvidia-bug-report.sh into overlay/usr/local/bin/
- bee-tui: pass --output directly to nvidia-bug-report.sh so log goes
  into the run_dir archive instead of CWD; remove redundant cp step

GPU diagnostic pack in TUI (System acceptance tests → GPU NVIDIA → Run command pack):
  nvidia-smi -q, dmidecode -t baseboard, dmidecode -t system, nvidia-bug-report.sh
All logs archived to /var/log/bee-sat/gpu-nvidia-<ts>.tar.gz

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

iso/overlay/usr/local/bin/bee-tui

@@ -456,18 +456,13 @@ run_gpu_nvidia_acceptance_test() {
     c1="nvidia-smi -q"
     c2="dmidecode -t baseboard"
     c3="dmidecode -t system"
-    c4="nvidia-bug-report.sh"
+    c4="nvidia-bug-report.sh --output $run_dir/nvidia-bug-report.log"
 
     run_cmd_log "nvidia_smi_q" "$c1" "$run_dir/01-nvidia-smi-q.log"; rc1=$?
     run_cmd_log "dmidecode_baseboard" "$c2" "$run_dir/02-dmidecode-baseboard.log"; rc2=$?
     run_cmd_log "dmidecode_system" "$c3" "$run_dir/03-dmidecode-system.log"; rc3=$?
     run_cmd_log "nvidia_bug_report" "$c4" "$run_dir/04-nvidia-bug-report.log"; rc4=$?
 
-    bug_report="$(ls -1 nvidia-bug-report.log.gz 2>/dev/null | head -n1 || true)"
-    if [ -n "$bug_report" ] && [ -f "$bug_report" ]; then
-        cp -f "$bug_report" "$run_dir/"
-    fi
-
     {
         echo "run_at_utc=$(date -u '+%Y-%m-%dT%H:%M:%SZ')"
         echo "cmd_nvidia_smi_q_rc=$rc1"