docs(readme): update project overview

README.md

@@ -1,7 +1,71 @@
-# Tauri + SvelteKit + TypeScript
+# shark
 
-This template should help get you started developing with Tauri, SvelteKit and TypeScript in Vite.
+Desktop music management application written in Typescript.
 
-## Recommended IDE Setup
+## Tech Stack
 
-[VS Code](https://code.visualstudio.com/) + [Svelte](https://marketplace.visualstudio.com/items?itemName=svelte.svelte-vscode) + [Tauri](https://marketplace.visualstudio.com/items?itemName=tauri-apps.tauri-vscode) + [rust-analyzer](https://marketplace.visualstudio.com/items?itemName=rust-lang.rust-analyzer).
+- [Tauri 2](https://v2.tauri.app/start/) (desktop runtime)
+- [SvelteKit 2](https://svelte.dev/docs/kit/introduction) with [Svelte 5](https://svelte.dev/docs/svelte/overview) (frontend)
+- TypeScript
+- [Bun](https://bun.sh/) (package manager)
+- Not-very-faithful Windows 98-style UI theme ([98-dark.css](https://github.com/markuryy/98-dark.css))
+
+
+## Setup
+
+### Prerequisites
+
+- Bun installed
+- Rust toolchain (for Tauri)
+
+### Installation
+
+```bash
+bun install
+```
+
+### Configuration
+
+1. Run the app: `bun run tauri dev`
+2. Go to Settings and configure:
+   - Music folder (where downloads will be saved)
+   - Playlists folder (for .m3u8 files)
+   - Download settings (format, concurrency, overwrite behavior)
+
+## Development
+
+```bash
+# Run dev server (hot reload)
+bun run tauri dev
+
+# Build for production
+bun run tauri build
+
+# Type checking
+bun run check
+```
+
+## How It Works
+
+### Architecture
+
+```
+src/
+├── routes/              # SvelteKit pages
+│   ├── library/         # Local library view
+│   ├── services/        # Downloads and metadata services UI
+│   ├── downloads/       # Download queue UI
+│   └── settings/        # App settings
+├── lib/
+│   ├── services/        # Downloads and metadata services
+│   ├── library/         # Library scanner, album/playlist loaders
+│   ├── stores/          # Svelte stores (settings, auth, queue)
+│   └── types/           # TypeScript type definitions
+src-tauri/
+├── capabilities/        # Tauri security permissions
+└── tauri.conf.json      # Tauri configuration
+```
+
+## License
+
+This repo has been made source available. It is not licensed under a single open source license. Check upstream libraries for license details.