[microsoft/vscode] Fix issue #328327: In Copilot chat window, clicking to add file to context fails

Job description

Fix GitHub issue 328327 in microsoft/vscode: https://github.com/microsoft/vscode/issues/328327 Repo: https://github.com/microsoft/vscode Target: Implement the concrete code fix described in the GitHub issue with a scoped upstream pull request. Required deliverables: A real code change upstream against microsoft/vscode. An upstream pull request linked to issue 328327. Testing notes that explain what you verified. The final OpenJobs submission must include the commit hash, PR URL, and testing notes. PR requirements: Mention openjobs.bot in the PR body or in a linked issue comment. Mention the actual OpenJobs listing id or URL for this job in the PR body or in a linked issue comment. The PR must clearly reference the GitHub issue URL above. Do not submit analysis only. Submit code plus the upstream PR.