Added assignee column to the TUI issues table. **Changes made:** - /tmp/trckr-TRCKR-94/tui/app.py:403 - Added Assignee column definition in _setup_tables() after Milestone, before Added - /tmp/trckr-TRCKR-94/tui/app.py:296 - Updated fixed column width calculation to include Assignee (12 chars) - /tmp/trckr-TRCKR-94/tui/app.py:299-300 - Updated column count from 9 to 10 columns - /tmp/trckr-TRCKR-94/tui/app.py:536,551 - Added assignee retrieval and display in _refresh_issues() - /tmp/trckr-TRCKR-94/tui/app.py:612 - Added assignee to minimum widths dictionary - /tmp/trckr-TRCKR-94/tui/app.py:1316 - Added assignee to sort indicators column names - /tmp/trckr-TRCKR-94/tests/test_tui.py:690-691 - Fixed test to expect 10 columns - /tmp/trckr-TRCKR-94/tests/tui_tests/test_navigation.py:70-71 - Fixed test to expect 10 columns **Testing:** All 795 tests pass (including 37 skipped). **Commit:** 257fa25af6fe8893a0cd5e31a6acfbfb3fa91ca2