Remove disallowed # type: ignore[import-untyped] comment from behave
import in tdd_tui_block_cursor_navigation_steps.py, consistent with
all other step definition files in the project.
All local quality gates pass: lint, typecheck, security_scan,
dead_code, complexity, format.
Trigger new CI run to resolve transient unit_tests job failure.
The test correctly captures bug #10371 using @tdd_expected_fail tag.
All quality gates pass locally (lint, typecheck, security, unit_tests).
Added a TDD test to verify block cursor navigation via Alt+Up and Alt+Down in the TUI. Introduced features/tdd_tui_block_cursor_navigation.feature with a scenario tagged @tdd_issue @tdd_issue_10371 @tdd_expected_fail that inspects CleverAgentsTuiApp.BINDINGS for the alt+up and alt+down bindings. Implemented features/steps/tdd_tui_block_cursor_navigation_steps.py with step definitions asserting the bindings are registered; the test is expected to fail while the bug is unfixed and is inverted by the @tdd_expected_fail tag.
ISSUES CLOSED: #10439
HAL9000