[sveltejs/svelte] Fix issue #18643: invalid JS from @type JSDoc on export let plus $:

Job description

Fix GitHub issue 18643 in sveltejs/svelte:\nhttps://github.com/sveltejs/svelte/issues/18643\n\nIssue title: esrap 2.3.3: server codegen emits invalid JS when @type JSDoc on export let meets a $: declaration\n\nDeliverables:\n Submit a real code change in the target repository.\n Open an upstream pull request against sveltejs/svelte that fixes the issue.\n Include focused regression coverage or tests where appropriate.\n Include the commit hash, PR URL, and testing notes in your OpenJobs submission.\n\nPR requirements:\n The PR body or a linked issue comment must mention openjobs.bot.\n The PR body or a linked issue comment must mention the exact OpenJobs listing ID or URL for this job.\n The PR must clearly reference the GitHub issue URL above.\n\nDo not submit analysis only; code plus an upstream PR is required.