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-# TrueScad WASM Webapp Plan
-
-Convert TrueScad from a GTK desktop app to a WASM webapp hosted on GitHub Pages.
-The GTK desktop app is being abandoned in favor of a web-first approach.
-
-## Architecture
-
-- **Rust** compiles to a `cdylib` WASM module via `wasm-pack`, exposing a `wasm-bindgen` API
-- **Vanilla JS** + HTML/CSS handles all UI
-- **CodeMirror 6** (bundled via npm/esbuild) for the Lua editor
-- **`<canvas>`** receives pixel data via `putImageData` directly from the Rust renderer
-- Rendering is **on-demand**: triggered by Run and drag events only
-
-## Crate changes
-
-| Item | Action |
-|---|---|
-| `src/window.rs`, `editor.rs`, `menu.rs`, `object_widget.rs`, `settings.rs`, `mesh_view.rs` | Delete |
-| `src/render.rs`, `src/lib.rs` | Keep — pure math, WASM-ready |
-| `src/main.rs` | Replace with `wasm-bindgen` entry point |
-| Root `Cargo.toml` | Remove gtk/sourceview4/gdk/glib/cairo-rs/kiss3d/rayon/dirs/pollster; add `wasm-bindgen`, `web-sys` |
-| `kiss3ddeps/` | Delete (only existed for kiss3d) |
-| `luascad/` | Deleted — folded into `src/luascad.rs` |
-
-## Views
-
-### Ray-march preview (primary)
-- Driven by the existing `Renderer` in `src/render.rs` — writes to `&mut [u8]` pixel buffer
-- WASM exposes `render(width, height) -> Uint8ClampedArray`
-- JS feeds the buffer into a `<canvas>` via `ctx.putImageData(new ImageData(arr, w, h))`
-- Mouse drag on canvas → `rotate(dx, dy)` / `pan(dx, dy)` → re-render
-- Fast feedback during editing; re-triggered on every Run
-
-### Mesh view (secondary, like the current kiss3d window)
-- Driven by `tessellation::ManifoldDualContouring` on the Rust side
-- WASM exposes `tessellate() -> Uint8Array` (binary STL bytes)
-- JS uses **Three.js** `STLLoader` to parse the bytes and display the mesh in a WebGL canvas
-- Three.js `OrbitControls` for rotate/pan/zoom of the mesh
-- Same `Uint8Array` is reused for the "Export STL" download — no duplication
-- Tessellation can be slow; triggered explicitly by a **[Mesh]** button, not on every Run
-
-### UI layout
-
-```
-┌──────────────────────────────────────────────────────────────┐
-│  [Run]  [Mesh]  [Export STL]                    (toolbar)    │
-├─────────────────────────┬────────────────────────────────────┤
-│                         │  [Preview] [Mesh]  ← tab toggle    │
-│  CodeMirror 6           │  ┌──────────────────────────────┐  │
-│  (Lua editor)           │  │  <canvas>                    │  │
-│                         │  │  ray-march OR Three.js mesh  │  │
-│                         │  └──────────────────────────────┘  │
-├─────────────────────────┴────────────────────────────────────┤
-│  output / error log                             (bottom)     │
-└──────────────────────────────────────────────────────────────┘
-```
-
-The right panel switches between the ray-march `<canvas>` and the Three.js `<canvas>` via the tab toggle. Three.js is loaded from npm alongside CodeMirror 6, bundled by esbuild.
-
-## Frontend layout
-
-```
-index.html
-main.js          ← wires CM6, canvas drag, buttons → WASM calls
-main.css
-pkg/             ← wasm-pack output (truescad.wasm + JS bindings)
-node_modules/    ← CM6 + Three.js (dev only, bundled by esbuild)
-```
-
-## Rust WASM API (updated)
-
-```rust
-#[wasm_bindgen] pub fn eval(code: &str) -> EvalResult
-#[wasm_bindgen] pub fn render(width: u32, height: u32) -> Uint8ClampedArray
-#[wasm_bindgen] pub fn rotate(dx: f64, dy: f64)
-#[wasm_bindgen] pub fn pan(dx: f64, dy: f64)
-#[wasm_bindgen] pub fn tessellate() -> Uint8Array   // binary STL — used for mesh view AND export
-```
-
-`tessellate()` replaces the separate `export_stl()` — same output, dual purpose.
-
-## Phase order
-
-1. **Strip root crate** — delete GTK files, rewrite `Cargo.toml`
-2. **`wasm-bindgen` API** — implement `src/lib.rs` with `eval`/`render`/`rotate`/`pan`/`tessellate`
-3. **Verify WASM builds** — `wasm-pack build --target web`
-4. **Frontend scaffold** — `index.html` + `main.js` + CodeMirror 6 + Three.js via esbuild
-5. **Wire JS ↔ WASM** — Run button, ray-march canvas, Mesh button + Three.js STL view, Export download
-6. **GitHub Actions** — npm install + esbuild bundle + `wasm-pack build --release` + deploy `dist/` to `gh-pages`
-
-## Status
-
-- [x] piccolo migration complete (`luascad` uses piccolo 0.3, no native C deps)
-- [x] `luascad` subcrate folded into `src/luascad.rs` (workspace simplified)
-- [ ] Phase 1: Strip root crate
-- [ ] Phase 2: wasm-bindgen API
-- [ ] Phase 3: Verify WASM builds
-- [ ] Phase 4: Frontend scaffold
-- [ ] Phase 5: Wire JS ↔ WASM
-- [ ] Phase 6: GitHub Actions + GitHub Pages