## Architecture

* Lit-based web components

* No-build tooling (importmap only)

* Zustand-moderated state management with IndexedDB storage mechanism

## Layout

```
src/
  store/
    index.js          ← zustand store definition
    middleware/
      persistence.js  ← idb-keyval persist adapter
      sync.js         ← optional cross-tab broadcast
  components/
    app-root.js
    feature-a/
      feature-a.js    ← Lit component
      feature-a.css   ← adopted stylesheet or constructable
  controllers/
    fetch.js          ← ReactiveController for API calls
    3d.js             ← optional Three/WebGPU controller
  lib/
    idb.js            ← thin idb-keyval wrapper/schema
index.html
importmap.json        ← extracted importmap (referenced via <script src>)
```

## The Complete Mental Model
```
IndexedDB
  ↕ (idb-keyval adapter)
Zustand persist middleware
  ↕ (vanilla store)
StoreController (ReactiveController)
  ↕ (requestUpdate → selector)
Lit Web Components
  ↕ (events / store actions)
User
```