Refactor UI redraw handling and improve message drawing logic

tests/test_nav_utils.py

@@ -0,0 +1,36 @@
+import unittest
+from unittest import mock
+
+from contact.ui import nav_utils
+from contact.ui.nav_utils import truncate_with_ellipsis, wrap_text
+from contact.utilities.singleton import ui_state
+
+
+class NavUtilsTests(unittest.TestCase):
+    def setUp(self) -> None:
+        ui_state.current_window = 0
+        ui_state.node_list = []
+        ui_state.start_index = [0, 0, 0]
+
+    def test_wrap_text_splits_wide_characters_by_display_width(self) -> None:
+        self.assertEqual(wrap_text("🔐🔐🔐", 4), ["🔐", "🔐", "🔐"])
+
+    def test_truncate_with_ellipsis_respects_display_width(self) -> None:
+        self.assertEqual(truncate_with_ellipsis("🔐Alpha", 5), "🔐Al…")
+
+    def test_highlight_line_uses_full_node_row_width(self) -> None:
+        ui_state.current_window = 2
+        ui_state.start_index = [0, 0, 0]
+        menu_win = mock.Mock()
+        menu_win.getbegyx.return_value = (0, 0)
+        menu_win.getmaxyx.return_value = (8, 20)
+        menu_pad = mock.Mock()
+        menu_pad.getmaxyx.return_value = (4, 20)
+
+        with mock.patch.object(nav_utils, "get_node_color", side_effect=[11, 22]):
+            nav_utils.highlight_line(menu_win, menu_pad, 0, 1, 5)
+
+        self.assertEqual(
+            menu_pad.chgat.call_args_list,
+            [mock.call(0, 1, 18, 11), mock.call(1, 1, 18, 22)],
+        )