fix(web): preserve DWG render state

Carry rendering fields omitted by document serialization and normalize block origins before building web caches.

Cargo.lock

@@ -3769,6 +3769,7 @@ dependencies = [
  "console_error_panic_hook",
  "getrandom 0.3.4",
  "js-sys",
+ "serde",
  "sha2 0.10.9",
  "wasm-bindgen",
 ]