fix(web): preserve DWG render state

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

crates/ocs_web_worker/Cargo.toml

@@ -10,6 +10,7 @@ crate-type = ["cdylib"]
 [dependencies]
 acadrust = { git = "https://github.com/HakanSeven12/cadcodec.git", rev = "7e2fa8c", features = ["serde"] }
 bincode = "1.3"
+serde = { version = "1", features = ["derive"] }
 console_error_panic_hook = "0.1"
 getrandom = { version = "0.3", features = ["wasm_js"] }
 js-sys = "0.3"