feat: configure minimum splash duration

tests/test_ui_imports.py

@@ -31,6 +31,14 @@ def test_splash_position_centers_on_pointer_and_stays_on_screen() -> None:
     ) == (0, 0)
 
 
+def test_splash_minimum_time_only_waits_for_remaining_duration() -> None:
+    from ccma.ui.splash import _remaining_minimum_ms
+
+    assert _remaining_minimum_ms(100.0, 5.0, 102.25) == 2750
+    assert _remaining_minimum_ms(100.0, 5.0, 106.0) == 0
+    assert _remaining_minimum_ms(100.0, 0.0, 100.0) == 0
+
+
 def test_event_labels_hide_board_actor_but_keep_automatic_marker() -> None:
     from ccma.domain.models import Event
     from ccma.ui.member_tab import _event_label