* fix(install): preserve non-array hook entries during uninstall
Uninstall filtering returned null for hook entries without a hooks
array, silently deleting user-owned entries with unexpected shapes.
Return the entry unchanged instead so only GSD hooks are removed.
* test(install): add regression test for non-array hook entry preservation (#1825)
Fix mirrored filterGsdHooks helper to match production code and add
test proving non-array hook entries survive uninstall filtering.
Addresses three findings from Codex adversarial review of #1768:
- Uninstall settings cleanup now filters at per-hook granularity instead of
per-entry. User hooks that share an entry with a GSD hook are preserved
instead of being removed as collateral damage.
- Add gsd-workflow-guard to PreToolUse/BeforeTool uninstall settings filter
so opt-in users don't get dangling references after uninstall.
- Codex install now strips legacy gsd-update-check.js hook entries before
appending the corrected gsd-check-update.js, preventing duplicate hooks
on upgrade from affected versions.
- 8 new regression tests covering per-hook filtering, legacy migration regex.
Fixes#1755