[PATCH b4 0/2] b4 tui: preserve the list viewport across rebuilds

Updating a series with 'u' in the review tracking TUI made the list
visibly jump towards the top of the screen while the cursor stayed on
the updated entry.  The tracker-style lists rebuild their ListView
wholesale on every refresh, so the scroll offset died with the
replaced widget; restoring the cursor index alone only scrolls the
minimum needed to make that row visible again, which pins the view to
the top of the list or glues the cursor row to the bottom edge.

Signed-off-by: Christian Brauner (Amutable) <[email protected]>
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Christian Brauner (2):
      b4 tui: preserve list scroll position across ListView rebuilds
      tests: cover scroll preservation across list rebuilds

 src/b4/bugs/_tui.py                | 11 ++++--
 src/b4/review_tui/_common.py       |  3 ++
 src/b4/review_tui/_tracking_app.py |  9 +++--
 src/b4/tui/__init__.py             |  3 ++
 src/b4/tui/_common.py              | 55 ++++++++++++++++++++++++++++-
 src/tests/test_tui_bugs.py         | 72 +++++++++++++++++++++++++++++++++++---
 src/tests/test_tui_tracking.py     | 53 ++++++++++++++++++++++++++++
 7 files changed, 196 insertions(+), 10 deletions(-)
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base-commit: 99fe195c0aa5a88be5033f87cad22bc32d27cbfe
change-id: 20260729-work-b4-tui-scroll-preserve-dd5f70abd1f3