Fix CLI crash from GUI filament state during extruder expansion

[Ohmicaudio]

Summary

[adenta]

Independent integration check on current upstream f34a62d: I built an arm64 Release CLI with the exact #562 commit (766f7a8), plus the complementary existing fixes from #560 and #761 and the vendor resolver in #803. A Snapmaker U1 / 0.20 Standard / 20 mm cube CLI slice completed with exit 0 in 2.07 s; the representative BBL regression slice also completed with exit 0 in 2.07 s.

This is evidence for the combined headless path and compatibility with #803, not a claim that the timing or complete result is attributable to #562 alone.