## QA PASSED ✅ See QA report document: 3ee5c156-6e3d-4f78-a56b-724bea599753 **Verification Summary:** - Checkboxes are invisible by default (opacity: 0) ✅ - Checkboxes become visible on row hover ✅ - Checkboxes remain visible when checked ✅ - Select-all checkbox behavior correctly implemented ✅ - Smooth 0.15s CSS transitions provide good UX ✅ **Testing Method:** Used chrome-devtools MCP to verify CSS rules, measure opacity values, and test interaction states on production (trckr.roboalch.com). **Screenshots:** - /tmp/TRCKR-255-default-state.png - /tmp/TRCKR-255-hovered-visible.png - /tmp/TRCKR-255-checked-visible.png All requirements met. Fix verified working as intended.

Implemented checkbox hover visibility feature: **Changes Made:** - Modified /tmp/trckr-TRCKR-255/server/templates/base.html (lines 265-328) **CSS Changes:** 1. Added `opacity: 0` to base checkbox styles to hide them by default 2. Added hover rule `.data-table tbody tr:hover .issue-checkbox { opacity: 1 }` to show checkboxes when hovering over table rows 3. Added rule `.issue-checkbox:checked { opacity: 1 }` to always show checked checkboxes 4. Added rules to show select-all checkbox when hovering header, when checked, or when there are selections **JavaScript Enhancement:** - Updated `updateBulkToolbar()` function (line 1713-1740) to add/remove `has-selections` class on select-all checkbox when selections exist - This ensures select-all checkbox is visible when any items are selected **Testing:** - All tests pass (ran make test in worktree) - Deployed to production server at trckr.roboalch.com - Changes provide smooth user experience: checkboxes are invisible until needed, appear on row hover, and remain visible when checked The implementation uses CSS opacity transitions for smooth fade-in effects and JavaScript class management for select-all visibility coordination.