update .gitignore, add CLAUDE.md

.gitignore

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 # potentially sensitive review information
 **/fastlane/metadata/review_information
+
+# ai
+.claude

CLAUDE.md

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+# CLAUDE.md
+
+This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
+
+## Development Commands
+
+**Build and Development**
+- `flutter pub get` - Install dependencies
+- `flutter run` - Run the app on connected device/emulator
+- `flutter build apk` - Build Android APK
+- `flutter build ios` - Build iOS app
+- `flutter analyze` - Run static analysis and lint checks
+
+**Code Generation (Required for MobX stores and JSON serialization)**
+- `flutter packages pub run build_runner build` - Generate code once
+- `flutter packages pub run build_runner watch` - Watch and regenerate code on changes
+- `flutter packages pub run build_runner build --delete-conflicting-outputs` - Force rebuild all generated files
+
+**Environment Variables**
+Use `--dart-define` to set environment variables:
+- `--dart-define=clientId=YOUR_TWITCH_CLIENT_ID`
+- `--dart-define=secret=YOUR_TWITCH_CLIENT_SECRET`
+
+## Architecture Overview
+
+**State Management**: Uses MobX for reactive state management. All stores end with `Store` and have corresponding `.g.dart` generated files. Stores are located within their respective screen directories under `stores/` folders.
+
+**Key Directories**:
+- `lib/screens/` - UI screens organized by feature (home, channel, settings, onboarding)
+  - Each screen has its own MobX stores in a `stores/` subdirectory
+- `lib/models/` - Data models with JSON serialization (uses .g.dart files)
+- `lib/apis/` - API services for Twitch, BTTV, FFZ, and 7TV
+- `lib/widgets/` - Reusable UI components
+- `lib/cache_manager.dart` - Custom cache management for images/media
+- `lib/utils.dart` - Utility functions and helpers
+
+**Main Application Flow**:
+1. App starts in `main.dart` with Firebase initialization and dependency injection via Provider
+2. Authentication handled by `AuthStore` using Twitch OAuth
+3. Settings persisted via `SettingsStore` with SharedPreferences
+4. API services inject common HTTP client for efficient connection reuse
+
+**Screen Architecture**:
+- Home screen with tabs: Following streams, Top streams, Categories, Search
+- Channel screen with video player and chat functionality
+- Settings screen with account management and app configuration
+- Onboarding flow for first-time users
+
+**Chat System**:
+- Real-time chat via WebSocket connection to Twitch IRC
+- Third-party emote support (BTTV, FFZ, 7TV) loaded asynchronously
+- Chat message parsing and rendering with emote/badge support
+- User interaction features (blocking, reporting, moderation)
+
+**Third-party Integrations**:
+- Firebase: Crashlytics, Performance monitoring, Analytics
+- Twitch API: Authentication, streams, users, chat
+- BTTV/FFZ/7TV APIs: Extended emote and badge support
+
+## Development Notes
+
+**MobX Code Generation**: This project heavily uses MobX for state management and JSON serialization. Any changes to MobX stores or model classes with `@JsonSerializable()` require running the build_runner to regenerate the corresponding `.g.dart` files. Generated files are excluded from analysis in `analysis_options.yaml`.
+
+**API Configuration**: Requires Twitch Client ID and Client Secret from dev.twitch.tv console for API access. Use `--dart-define` flags when running the app.
+
+**Code Style**: The project enforces specific lint rules including single quotes, trailing commas, final locals, and package imports. Run `flutter analyze` to check for violations.
+
+**Dependency Injection**: Uses Provider for dependency injection, with all major services (API clients, stores) provided at the app root in `main.dart` with a shared HTTP client for efficiency.
+
+**Platform Support**: iOS and Android with platform-specific configurations. Uses Firebase for crashlytics, performance monitoring, and analytics.