structuredClone() rejects DataView objects with TypeError

[MayankSharma-2812]

Describe the bug

Calling structuredClone() on a DataView instance currently throws TypeError: Data views are not supported yet. instead of returning a cloned DataView.

To Reproduce

const buffer = new ArrayBuffer(16);
const view = new DataView(buffer, 4, 8);

view.setInt32(0, 42);

const copy = structuredClone(view);

This currently throws:

TypeError: Data views are not supported yet.

Expected behavior

According to the WHATWG HTML Structured Clone algorithm, DataView objects are supported by the structured clone mechanism.

structuredClone(view) should return a new DataView that:

• Preserves the original byteOffset and byteLength.
• Contains a clone of the underlying ArrayBuffer.
• Does not share the underlying buffer with the original DataView.

For example, modifying the original buffer after cloning should not modify the cloned DataView.

Build environment

• OS: Windows 11
• Target triple: x86_64-pc-windows-msvc
• Rustc version: rustc 1.96.0

Additional context

In core/wintertc/src/store/from.rs, DataView objects are currently rejected with:

} else if let Ok(_dataview) = JsDataView::from_object(object.clone()) {
    return Err(js_error!(TypeError: "Data views are not supported yet."));
}

The deserialization logic for DataView is already present in core/wintertc/src/store/to.rs, and ValueStoreInner::DataView already exists in core/wintertc/src/store/mod.rs.

This appears to leave the serialization side in store/from.rs as the missing part of the implementation.