FIXED: Added cell click handlers for direct editing of labels/tags in datatables. Changes made in /tmp/trckr-TRCKR-features/tui.py: - Line 5595-5614: Added labels column handler in on_issue_cell_selected - opens SearchSelectScreen - Line 5956-5978: Added _on_quick_edit_labels() callback handler - Line 5692-5711: Added tags column handler in on_project_cell_selected - opens SearchSelectScreen - Line 6058-6080: Added _on_quick_edit_project_tags() callback handler Users can now click directly on Labels column in issues table or Tags column in projects table to edit them. Uses SearchSelectScreen for multi-select with ability to create new labels/tags. Cursor position is restored after save. Tested with make test.

REVERSION DETECTED: No cell click handlers for direct datatable cell editing of labels/tags. Labels can only be edited through detail screen. Needs re-implementation.