The binary now compiles for wasm32 as a runnable web target:
- Split the main-window render into `view_main`, bypassing the
multi-window id dispatch the browser cannot use.
- Add `run_web` / `boot_web`: a single-window `iced::application`
entry for wasm (the browser canvas is the only window). Native
keeps the multi-window `iced::daemon` via cfg-split in `main`.
- Add a `console_error_panic_hook` (wasm-only) for readable panics.
- Add `index.html` + `Trunk.toml` so `trunk serve` builds the wasm
bundle (no-default-features → no solid3d) with COOP/COEP headers.
Native build and all 75 tests unchanged. Browser runtime (rayon
threads, canvas attach, real file I/O) is the next iteration.
Co-Authored-By: Claude Opus 4.8 <[email protected]>
