docs: expand d-sports-engage-native documentation

repositories/d-sports-engage-native.mdx

@@ -1,14 +1,26 @@
 ---
 title: "d-sports-engage-native"
 description: "Native iOS and Android app for D-Sports Engage. Expo 54, React Native, Clerk, RevenueCat, Thirdweb."
 icon: "smartphone"
 ---
 
 ## Overview
 
 **d-sports-engage-native** (package name: `engage-native`) is the native mobile app for D-Sports. It mirrors the core PWA experience on iOS and Android: wallet, shop, leaderboard, locker room, and profile.
 
-- **Run:** `bunx expo start` or `bun run start` — then press `a` for Android or `i` for iOS, or scan the QR code with Expo Go.
+## Getting started
+
+```bash
+# Install dependencies
+bun install
+
+# Start development server
+bunx expo start
+# Press 'a' for Android, 'i' for iOS, or scan QR with Expo Go
+
+# TypeScript check
+bun tsc --noEmit
+```
 
 ## Tech stack
 
@@ -17,31 +29,87 @@
 | Framework  | Expo 54, React Native 0.81, React 19 |
 | Auth       | Clerk (Expo)              |
 | Payments   | RevenueCat (react-native-purchases) |
 | Web3       | Thirdweb                  |
 | State      | Zustand                   |
 | Storage    | MMKV                      |
 | UI         | Lucide React Native       |
 | Navigation | Expo Router               |
 | Package    | Bun                       |
 
+## Project structure
+
+```tree
+app/
+├── (auth)/              # Login/signup screens
+├── (onboarding)/        # New user onboarding flow
+├── (tabs)/              # Main tab navigation
+│   ├── wallet.tsx       # Wallet screen (JSX only — logic in hook)
+│   ├── shop.tsx         # Shop screen (JSX only — logic in hook)
+│   ├── leaderboard.tsx  # Leaderboard screen
+│   ├── locker-room.tsx  # Social feed
+│   └── profile.tsx      # User profile
+├── settings/            # Settings pages with nested modals/tabs
+└── _layout.tsx          # Root layout with providers + auth protection
+
+components/
+├── wallet/              # Wallet sub-components (TokenRow, ActionModal, etc.)
+├── shop/                # Shop sub-components (CartModal, CryptoCheckoutModal, etc.)
+├── locker-room/         # Locker room components
+├── layout/              # AppScreen wrapper (responsive web max-width)
+├── ui/                  # Reusable UI primitives (Button, TextField, etc.)
+└── Icon/                # Icon wrapper using lucide-react-native
+
+hooks/
+├── use-wallet-screen.ts # All wallet state, effects, and handlers
+├── use-shop-screen.ts   # All shop state, effects, and handlers
+└── useScrollHandler.ts  # Scroll-based navbar visibility
+
+lib/
+├── api/                 # API client modules (wallet, shop, user, checkout, etc.)
+├── revenuecat/          # RevenueCat in-app purchases provider
+└── utils.ts             # Shared utilities
+
+context/
+├── user-context.tsx     # Authentication, user profile, team membership
+├── collectibles-context.tsx # Owned packs and items
+└── navbar-visibility-context.tsx
+```
+
 ## Features
 
 - **Wallet** — Tokens, holdings, pack opening, crypto checkout (via PWA backend)
 - **Shop** — Collectibles, cart, coin bundles, checkout
 - **Leaderboard** — Rankings and filters
 - **Locker room** — Social feed and engagement
 - **Profile** — User profile and settings
 - **Theme** — Dark/light mode (default dark)
 
-## Getting started
+## Architecture patterns
+
+- **File-based routing** via Expo Router with route groups `(tabs)`, `(auth)`, `(onboarding)`
+- **Modular screen architecture** — screen files contain only JSX; all state/effects/handlers live in dedicated hooks
+- **Zustand + MMKV** for global state with synchronous persistence
+- **React Context** for auth, collectibles, navbar visibility
+- **API client layer** in `lib/api/` with MMKV cache fallback
+- **Crypto checkout** via Thirdweb SDK calling PWA backend for on-chain payments
+- **PWA-ready** — `display: standalone`, responsive desktop layout, web hover states
+
+## Checkout and payments
+
+| Method | Provider | Platform |
+| ------ | -------- | -------- |
+| Fiat   | RevenueCat | Apple IAP (native), Google Play (native), Stripe (web) |
+| Crypto | Thirdweb | Arbitrum (default), Ethereum, Polygon |
+
+The crypto checkout flow calls the PWA backend at `POST /api/checkout/crypto` and `POST /api/checkout/crypto/verify`.
 
-1. Clone the repository and run `bun install`.
-2. Configure environment (Clerk, RevenueCat, Thirdweb, API base URL) per repo README.
-3. Run `bunx expo start`.
-4. For development builds: `bun run build:dev` (EAS) or run with Expo dev client.
+## Branding
 
-The app targets both native and web (responsive) and uses the same backend (d-sports-api) as the PWA for API and checkout flows.
+- **Base background (dark):** `#0a0e1a`
+- **Accent gold:** `#F5C842` / `#FFD700`
+- **Primary blue:** `#4169E1`
+- Default theme is dark mode
 
 <Card title="Ecosystem overview" icon="map" href="/repositories/ecosystem-overview">
   See how the native app fits with the PWA, site, and Mic'd Up.
 </Card>