[sh1pt-actions-fleet]

Summary

• Refresh the group.call homepage for ad traffic with a clear pitch, one primary start-call action, a short how-it-works section, and a phone join link.
• Let signed-in visitors create a quick-call room in one tap; after CoinPay sign-in, return to the same intent and create the room.
• Preserve allowlisted UTM and ad click IDs through the CTA and sign-in, with analytics-friendly CTA data attributes.
• Release version 0.16.0.

Verification

• bun test (74 passing)
• bun x tsc --noEmit
• git diff --check