Wrap the key bindings bar over several lines

Textual's Footer is a single horizontal row, so on a narrow terminal the
keys at the end were cut off. KeyBar replaces it on every screen: it reads
the same active bindings, packs them greedily into rows that fit the width,
and grows in height as needed.

Generated with AI

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

tests/test_app.py

@@ -4,6 +4,7 @@ All cli functions are monkeypatched: cv4pve-cli is never executed.
 """
 
 import contextlib
+import itertools
 import re
 import subprocess
 import threading
@@ -4872,3 +4873,51 @@ async def test_restore_before_the_info_screen_loaded_says_still_loading(
         finally:
             release.set()
         await settle(app, pilot)
+
+
+# --- key bar wraps instead of overflowing ---------------------------------------------
+
+
+@given(st.lists(st.integers(1, 30), max_size=25), st.integers(1, 120))
+def test_wrap_rows_keep_order_fit_width_and_pack_greedily(widths, width):
+    rows = appmod.wrap_rows(widths, width)
+    assert [w for row in rows for w in row] == widths
+    for row in rows:
+        assert row  # no empty rows
+        assert sum(row) <= width or len(row) == 1  # only a lone item may overflow
+    for prev, nxt in itertools.pairwise(rows):
+        assert sum(prev) + nxt[0] > width  # greedy: the next item did not fit
+
+
+def keybar_text(app):
+    bar = app.screen.query_one(appmod.KeyBar)
+    return bar, "\n".join(
+        bar.lines(bar.size.width)[i].plain for i in range(bar.size.height)
+    )
+
+
+async def test_keybar_wraps_on_a_narrow_terminal(fake):
+    app = make_app()
+    async with app.run_test(size=(50, 30)) as pilot:
+        await settle(app, pilot)
+        bar, text = keybar_text(app)
+        assert bar.size.height > 1
+        for desc in ("Start", "Tasks", "Updates", "Quit"):
+            assert desc in text
+
+
+async def test_keybar_is_one_line_on_a_wide_terminal(fake):
+    app = make_app()
+    async with app.run_test(size=(400, 30)) as pilot:
+        await settle(app, pilot)
+        bar, text = keybar_text(app)
+        assert bar.size.height == 1
+        assert "Quit" in text
+
+
+async def test_keybar_follows_the_info_screen_bindings(fake):
+    app = make_app()
+    async with app.run_test(size=(50, 40)) as pilot:
+        await open_info(app, pilot)
+        _bar, text = keybar_text(app)
+        assert "Restore backup" in text