In plugins/fs/guest-js/index.ts, the size function only sent `path`
although the Rust command accepts `options.baseDir` and the JSDoc example
passed `{ baseDir: BaseDirectory.AppData }` (a TS error, silently dropped
at runtime, so the relative path was rejected).
Adds an optional `options?: SizeOptions` parameter (new exported type).
api-iife.js regenerated. The e2e spec now measures a file and a directory
relative to AppData instead of working around the missing option.
In plugins/fs/src/commands.rs write_file_inner, a malformed or non-ASCII
`options` header was dropped with .ok(), so baseDir/append/createNew were
silently ignored and the call became a truncating write to the raw path;
the JSON array body fallback truncated values above 255 and dropped
non-numbers.
The header is parsed with parse_write_file_options: empty, `undefined`
(what fetch sends for JSON.stringify(undefined)) and `null` mean no
options, anything else must parse. Array bodies must only contain bytes.
Unit test for the header parser; e2e spec for writes without options,
which is the case the `undefined` handling keeps working.
Lucas Fernandes Nogueira