iOS Navigation (Modular MVVM-C) Opinionated navigation enforcement for SwiftUI apps using the clinic modular architecture. Focus on coordinator + route shell wiring, feature isolation, and resilient push/sheet/deep-link flows. Non-Negotiable Constraints (iOS 26 / Swift 6.2) - macro on every navigation view, never - everywhere, / never - App-target coordinators own ; route shells own mappings - Coordinator-owned modal state, inline booleans for sheets never - Domain layer defines coordinator protocols; concrete coordinators stay out of feature modules Clinic Architecture Contract (iOS 26 / Swi…