Merge views into Match, expand history, and polish the UI

- Match page now holds players/match info, turn stats with a turn
  picker, and the deck lists (My deck · Preview · Opponent); the Deck
  and Turn tabs are gone. Section heights are draggable and remembered.
- History: sortable, resizable columns; deck and commander columns;
  right-click to show only or hide games with a value, with filter
  chips; stats tiles (win rate overall, last 10/100, last 7 days,
  play/draw, average length and turns) that follow the filters.
  Commanders are backfilled for games recorded before they were stored.
- Deck panel shows copies per zone against the deck total (e.g. 2/5).
- Preview can be cleared with ✕, a click on the image, or Esc.
- Customize menu stays open while toggling; Arrange covers deck
  sections and turn stats together.
- Fix squeezed nav buttons and the header pushing controls off-screen.
- Fix known opponent cards being double-counted when also revealed.

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

tests/test_gamestate.py

@@ -225,3 +225,25 @@ def test_commanders_are_not_emblems():
     assert g.commander_status(OPP) == [(9000, "stack")]
     assert g.commander_tax(OPP) == 2
     assert g.commander_tax(ME) == 0
+
+
+def test_revealed_card_already_tracked_is_not_double_counted():
+    t = MatchTracker()
+    start_game(t)
+    # Their card is bounced back to hand (tracked), and a reveal shows the same card.
+    t.handle(GreMessages([gsm(2, annotations=[id_changed(200, 210)], zones=[
+        zone(OPP_HAND, "Hand", [201], OPP), zone(BATTLEFIELD, "Battlefield", [210]),
+    ], objects=[card(210, 5005, BATTLEFIELD)])]))
+    t.handle(GreMessages([gsm(3, annotations=[id_changed(210, 220)], zones=[
+        zone(OPP_HAND, "Hand", [220], OPP), zone(BATTLEFIELD, "Battlefield", []),
+    ], objects=[card(400, 5005, OPP_HAND, otype="RevealedCard")], deleted=[210])]))
+    assert t.game.opp_known_in("ZoneType_Hand") == {5005: 1}
+
+
+def test_known_cards_never_exceed_zone_size():
+    t = MatchTracker()
+    start_game(t)
+    # Two reveals of different cards while their hand only has one card left.
+    t.handle(GreMessages([gsm(2, zones=[zone(OPP_HAND, "Hand", [201], OPP)], objects=[
+        card(400, 7007, OPP_HAND, otype="RevealedCard"), card(401, 7008, OPP_HAND, otype="RevealedCard")])]))
+    assert sum(t.game.opp_known_in("ZoneType_Hand").values()) == 1