# Technology Stack

## Platform & Framework
- **Platform**: OpenHarmony (HarmonyOS) 5.0.5
- **Language**: ArkTS (TypeScript-based)
- **Architecture**: Stage Model
- **Min SDK**: API 12 (compatible with API 9+)
- **Target SDK**: API 17

## Build System
- **Build Tool**: Hvigor (HarmonyOS build system)
- **Package Manager**: OHPM (OpenHarmony Package Manager)
- **Native Build**: CMake for C/C++ components

## Core Libraries & Dependencies

### Media Processing
- **ijkplayer**: FFmpeg-based video/audio player (v2.0.6)
- **FFmpeg**: Media codec and processing
- **SoundTouch**: Audio processing and pitch shifting
- **libyuv**: Video processing library

### UI & Utilities
- `@pura/harmony-utils`: Common utilities and helpers
- `@pura/harmony-dialog`: Dialog components
- `@ohos/lottie`: Animation support
- `@ohos/pulltorefresh`: Pull-to-refresh component
- `@chinalike/popup`: Popup components
- `@keke/color-picker`: Color picker component

### Payment & Services
- `@cashier_alipay/cashiersdk`: Alipay payment integration
- `@tencent/wechat_open_sdk`: WeChat integration

### Text Processing
- `@changwei/chardet`: Character encoding detection
- `@sgaolei/lrc_parser`: Lyrics parsing
- `@ohos/pinyin4js`: Chinese pinyin conversion

## Code Style & Conventions
- Use ArkTS/TypeScript syntax
- Follow HarmonyOS component lifecycle patterns
- Use `@Component`, `@Entry`, `@Preview` decorators appropriately
- Implement proper state management with `@State`, `@Prop`, `@Link`
- Use structured logging with consistent TAG naming
- Follow camelCase for variables and PascalCase for components