Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In `@crates/wasm/src/browser_module.rs`:
- Around line 26-31: The match arm for "array_buffer" double-wraps the result by
returning Ok(Self::ArrayBuffer) inside an outer Ok(match ...), causing an
Ok(Ok(...)); change the "array_buffer" arm to return Self::ArrayBuffer (i.e.,
remove the inner Ok) so all match arms produce the same variant type and the
outer Ok(...) yields Ok(Self::ArrayBuffer); update the match in the function
that parses the response format (the match on s returning Self::Json,
Self::Text, Self::ArrayBuffer and the Err from vm.new_type_error) to keep
consistent return types.
- Around line 181-189: The free-standing function document is using Self (only
valid inside impl blocks); change its signature and references to use the
concrete type name Document instead of Self: return PyRef<Document>, construct
Document { doc: ... } instead of Self { ... }, and call
Document::make_static_type() (or the appropriate associated function) for the
third argument to PyRef::new_ref so the function compiles at module scope.