[Client] Show localized card names, texts and pictures

Localization wiring now runs end to end: the oracle importer collects
foreignData for the configured language and the client renders it.

- [Oracle] Import localized names and rules texts for the selected cardLang
  - single-face cards store their foreignData name and full text
  - multi-face (split/adventure/aftermath/prepare) cards collect the joined
    name once and join each face's translated text with the same separator
    as the English merge; an incomplete translation falls back to English;
    the joined text follows the same highest-priority-set policy as the
    single-face path and is only collected when localization is enabled
  - the wizard switching languages re-imports the card database

- [Client] Display localized card info throughout the client
  - card info text/picture widgets and the game board re-render on language
    change
  - pictures resolve cardLang art through Scryfall's named endpoint using the
    localized name, falling back to id-based art when no match exists
  - deck editor keeps canonical English names as card identity (EditRole)
    while showing localized names (DisplayRole), so decks and wire names
    stay stable

- [Card] Add CardLocalization-backed name/text lookup and cards.xml v4
  localization elements with a bounded-size translation cache

- [Tests] Cover oracle foreignData import (incl. multi-face joins, priority
  and fallback paths), XML v4 localization parsing, deck model localized
  display and the language-aware settings default

Existing installations need to re-run Oracle to see translations: localized
data only lands in cards.xml when the Oracle app is started with the
preferred language selected — launch the separate "Oracle" program that
ships with Cockatrice, pick the language in the wizard and let it re-import
the card database.

The client's database cache (cards.xml.cache) is invalidated by the cache
format bump and the source-hash checks, but a cache written before the
re-import can still hold English-only entries (the hash uses file size and
mtime, so a same-size/same-timestamp rewrite may be served as-is); delete
cards.xml.cache and relaunch if no localized names/texts show up after
re-importing.

cockatrice/src/interface/widgets/cards/card_info_text_widget.cpp

@@ -1,6 +1,7 @@
 #include "card_info_text_widget.h"
 
 #include "../../../game_graphics/board/card_item.h"
+#include "../../card_localization.h"
 
 #include <QGridLayout>
 #include <QLabel>
@@ -39,6 +40,12 @@ CardInfoTextWidget::CardInfoTextWidget(QWidget *parent) : QFrame(parent), info(n
     grid->setRowStretch(1, 1);
 
     retranslateUi();
+
+    connect(&SettingsCache::instance().cardsDisplay(), &CardsDisplaySettings::cardLangChanged, this, [this] {
+        if (currentCard) {
+            setCard(currentCard);
+        }
+    });
 }
 
 void CardInfoTextWidget::setTexts(const QString &propsText, const QString &textText)
@@ -60,7 +67,7 @@ void CardInfoTextWidget::setCard(const ExactCard &exactCard)
 
     QString text = "<table width=\"100%\" border=0 cellspacing=0 cellpadding=0>";
     text += QString("<tr><td>%1</td><td width=\"5\"></td><td>%2</td></tr>")
-                .arg(tr("Name:"), card->getName().toHtmlEscaped());
+                .arg(tr("Name:"), LocalizedCard::displayName(card).toHtmlEscaped());
 
     if (!exactCard.getPrinting().isEmpty()) {
         QString setShort = exactCard.getPrinting().getSet()->getShortName().toHtmlEscaped();
@@ -94,7 +101,8 @@ void CardInfoTextWidget::setCard(const ExactCard &exactCard)
     }
 
     text += "</table>";
-    setTexts(text, card->getText());
+    setTexts(text, LocalizedCard::displayText(card));
+    currentCard = exactCard;
 }
 
 void CardInfoTextWidget::setInvalidCardName(const QString &cardName)