v0.7.0: Full bleed

The game screens claim the whole viewport, and the difficulty curve gets restructured under the hood.

Added

• Shield and split traits now debut on the wave 15 elite, pulled in from wave 20
• Escalation slope moves off enemy density onto durability, on a decade flux cycle

Balance

• The Revolver's drum slims down to rockets and lances

UI

• Run and deploy screens go full bleed: no container, edge to edge on phones, filling the full viewport height. Wider field and denser vapor clouds to match.
• Play is now everywhere it should be: the landing page primary button, the header bar, the deploy screen's commit button, and the deploy page title