v0.12.3

Cleanup

Dead code removed

• updateDescription() from update command (unused wrapper)
• updateTaskMarkdown(), getMyTasksFromList(), getAssignedListIds() from API client (unused wrappers)
• Narrowed 14 interface exports to file-private (only used internally, never imported elsewhere)

Shell completions fixed

• Added 6 missing commands to all 3 shells: auth, search, depend, move, sprints, activity
• Added missing flags to 9 existing commands across all shells (--include-closed, --time-estimate, --parent, --status, --name, --json, --custom-item-id)

Tests

• Added tests/unit/date.test.ts for shared date formatting utility
• Removed 5 tests for deleted dead code
• 395 tests across 33 test files