Tutorial gifts now cover the starter pack + starter deck flow (crystals
+ ether + tickets granted via ViewerPresents on signup), so the 50k/50k/50k
default deposit was double-dipping. Zero the ShippedDefaults so a fresh
viewer's currency reflects exactly what they've earned.
Also update the two tests that asserted the old 50k baseline.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
