docs: add In-App Purchase implementation plan

14 bite-sized TDD tasks covering:
- StoreKit configuration file setup
- StoreManager with entitlement checking
- PaywallView and OnboardingPaywallView
- ProGate view modifier for feature gating
- Trip saving, PDF export, and Progress tab gating
- Settings subscription management

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
This commit is contained in:
Trey t
2026-01-13 10:11:02 -06:00
parent 56138d3282
commit e4204175ea

File diff suppressed because it is too large Load Diff