Race on rapid combobox open/close (org/repo data hooks)

[ryota-murakami]

Summary

useOrganizationData and useRepositoryData lack AbortController and a cancelled flag.

Source

P2 follow-up from /ship adversarial review of PR #176 (silent GitHub token refresh).

Details

Out-of-order resolution from rapid open→close→open can land stale data into the combobox state.

Fix

Add an ignore flag in the effect closure (or AbortController).

Acceptance

• Rapid open/close does not show stale data
• Tests cover the cancellation path