Address Greptile P1 review (discussion r3530941293) on commit e8f7e28a:
the v2 frontend recovery path was dead at the DOM level. static/ui.js
references $('btnClearUpdateLock') but no matching element existed in
static/index.html, so users hitting a lock conflict never saw a clickable
affordance -- the error panel was the only visible state.
Add the missing button next to btnForceUpdate in the update-banner action
row:
<button class="update-btn" id="btnClearUpdateLock"
style="display:none"
onclick="applyClearUpdateLock(this)">
Clear lock and retry update
</button>
Style mirrors the neutral update-btn (NOT the red --error used by the
destructive Force update) so the recovery affordance doesn't read as a
warning. Hidden by default; revealed by the existing _showUpdateError()
helper when res.lock_conflict is set.
Regression tests in TestClearLockButton (3 tests):
- test_clear_lock_button_exists
- test_clear_lock_button_hidden_by_default
- test_clear_lock_button_calls_applyClearUpdateLock_handler
These lock in the contract that the button element must be present and
correctly bound; future refactors that rename the id or strip the button
will fail loud. Mirrors the existing TestIndexHtmlBanner conventions
for btnForceUpdate.
Verification:
- ./scripts/test.sh tests/test_updates.py -k lock -> 35 passed
- ./scripts/test.sh tests/test_update_banner_fixes.py -> 102 passed
- ./scripts/test.sh tests/test_api_timeout.py -> 8 passed
- ruff_lint --diff upstream/master -> 0 new violations
dcec232dfa
