Add match, turn and history views with a dark theme

- Top bar switching between Deck, Match, Turn and History views
- Match view: life, player counters, commanders, emblems, zone counts,
  turn timer and timeouts, land drops used/allowed, play/draw and Bo3
  draw counts, with the deck view below
- Turn view: per-player and total stats per turn with history, plus
  whole-game totals and land drops
- History: every finished game (colours, winner, who was on the play);
  click to reopen it in the other views; imports Player-prev.log
- Customize menu to show/hide items and an Arrange dialog to reorder
  deck sections and turn stats, remembered across sessions
- Static dark theme with mint accent, rounded corners, larger text
- Commanders tracked separately from emblems, with location and tax
- Quieter, non-sticky warning for cards lost to MTGA log gaps
- Correct Scryfall images for tokens

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

tests/test_toggles.py

@@ -0,0 +1,41 @@
+import pytest
+from PySide6.QtCore import QSettings
+
+from mtga_assistant.ui.toggles import Toggles
+
+ITEMS = [("a", "A"), ("b", "B"), ("c", "C")]
+
+
+@pytest.fixture(autouse=True)
+def isolated_settings(tmp_path):
+    QSettings.setPath(QSettings.Format.NativeFormat, QSettings.Scope.UserScope, str(tmp_path))
+    yield
+
+
+def test_default_order_and_visibility():
+    t = Toggles("g1", ITEMS, defaults_off={"b"})
+    assert t.order() == ["a", "b", "c"]
+    assert not t.on("b") and t.on("a")
+
+
+def test_order_and_visibility_persist():
+    t = Toggles("g2", ITEMS)
+    t.apply(["c", "a", "b"], {"a": False})
+    again = Toggles("g2", ITEMS)
+    assert again.order() == ["c", "a", "b"]
+    assert not again.on("a") and again.on("c")
+    assert [k for k, _ in again.ordered_items()] == ["c", "a", "b"]
+
+
+def test_new_items_slot_in_after_their_default_neighbour():
+    Toggles("g3", ITEMS).apply(["c", "a", "b"], {})
+    grown = Toggles("g3", [("a", "A"), ("new", "New"), ("b", "B"), ("c", "C")])
+    assert grown.order() == ["c", "a", "new", "b"]
+
+
+def test_unknown_saved_keys_are_dropped_and_reset_restores_defaults():
+    t = Toggles("g4", ITEMS)
+    t.apply(["gone", "b", "a", "c"], {"b": False})
+    assert t.order() == ["b", "a", "c"]
+    t.reset()
+    assert t.order() == ["a", "b", "c"] and t.on("b")