Architecture Overview

src/
├── main.tsx                     # Entry point
├── App.tsx                      # Layout: Toolbar + Sidebar + Canvas
│
├── store/
│   └── useStore.ts              # Zustand store (bins, grid, undo/redo)
│
├── components/
│   ├── Toolbar.tsx              # Top bar: view modes, export, camera
│   ├── Sidebar.tsx              # Left panel: presets, bin list, BOM, tools
│   ├── GridCanvas2D.tsx         # 2D SVG grid with all interactions
│   ├── BinConfigurator.tsx      # Bin parameter editor
│   └── Viewport3D.tsx           # Three.js 3D preview
│
├── gridfinity/
│   ├── constants.ts             # Gridfinity dimensions & presets
│   ├── binGeometry.ts           # Manifold CSG bin generation
│   ├── baseplateGeometry.ts     # Manifold CSG baseplate generation
│   ├── profiles.ts              # Z-profile cross sections
│   └── export3mf.ts             # 3MF packaging (JSZip + XML)
│
├── hooks/
│   ├── useManifold.ts           # WASM initialization
│   └── useManifoldWorker.ts     # Web Worker interface
│
├── workers/
│   └── manifoldWorker.ts        # Background geometry generation
│
└── utils/
    ├── collision.ts             # AABB collision detection
    ├── gridMath.ts              # Screen <-> Grid coordinate math
    └── meshToThree.ts           # Manifold mesh -> Three.js geometry