cmdPhaseComplete used replaceInCurrentMilestone() to update the overview
bullet checkbox (- [ ] → - [x]), but that function scopes replacements
to content after the last </details> tag. The current milestone's
overview bullets appear before any <details> blocks, so the replacement
never matched.
Switch to direct .replace() which correctly finds and updates the first
matching unchecked checkbox. This is safe because unchecked checkboxes
([ ]) only exist in the current milestone — archived phases have [x].
Closes#1998
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
