fix: use published opencut-wasm package

rust/wasm/README.md

@@ -19,3 +19,24 @@ All exports are documented in the [TypeScript definitions](./opencut_wasm.d.ts).
 ## Source
 
 Functions are implemented in Rust under [`rust/crates/`](../crates/). This package is the compiled WebAssembly output — do not edit it directly.
+
+## Local development
+
+The web app depends on the published `opencut-wasm` package by default. If you are editing the WASM source in this repo and want `apps/web` to use your local build instead:
+
+```bash
+# From the repo root
+bun run build:wasm
+
+cd rust/wasm/pkg
+bun link
+
+cd ../../../apps/web
+bun link opencut-wasm
+```
+
+While you work, rebuild on changes from the repo root:
+
+```bash
+bun dev:wasm
+```