[Fonts] Migrate DeckList and InterfaceDefault surfaces to theme roles (#7539)

* [Fonts] Migrate DeckList and InterfaceDefault surfaces to theme roles

* [Fonts] Drop unused lambda captures in font-refresh handlers

* [Fonts] Fix pixel sizes and game overlay fonts from review

- Set the sizes the stylesheets carried with setPixelSize() rather than
  setPointSize(): home buttons (34), banner (24), home group box (20),
  the placeholder labels (14), the analytics drag handle (10), the EDHREC
  navigation buttons (24), the user info popup (11/14/11/10/11) and the
  game overlays (14/16/12). Points at 96 DPI were ~33% larger.
- The drag/total counters and tally columns keep the monospace family the
  stylesheets set, so digit widths stop changing as counts tick and
  white-space: pre stays aligned.
- applyDeckListFont() drops the cached tally rows before re-measuring, so
  previewing a larger DeckList font no longer leaves the tally clipped.
- Tally labels and the constructor/fontsChanged pairs in the shared-deck
  preview, quick setup, analytics panel, home box and public decks build
  their font once in a local lambda instead of twice.

---------

Co-authored-by: Lukas Brübach <Bruebach.Lukas@bdosecurity.de>

cockatrice/src/interface/widgets/visual_deck_editor/visual_deck_editor_placeholder_widget.cpp

@@ -1,5 +1,8 @@
 #include "visual_deck_editor_placeholder_widget.h"
 
+#include "../interface/theme_manager.h"
+
+#include <QFont>
 #include <QLabel>
 #include <QVBoxLayout>
 #include <qnamespace.h>
@@ -28,10 +31,12 @@ VisualDeckEditorPlaceholderWidget::VisualDeckEditorPlaceholderWidget(QWidget *pa
     textLabel->setStyleSheet(R"(
         QLabel {
             color: palette(mid);
-            font-size: 14px;
             padding: 10px;
         }
     )");
+    applyInterfaceDefaultFont();
+    connect(themeManager, &ThemeManager::fontsChanged, this,
+            &VisualDeckEditorPlaceholderWidget::applyInterfaceDefaultFont);
 
     mainLayout->addWidget(imageLabel);
     mainLayout->addWidget(textLabel);
@@ -42,4 +47,12 @@ VisualDeckEditorPlaceholderWidget::VisualDeckEditorPlaceholderWidget(QWidget *pa
 void VisualDeckEditorPlaceholderWidget::retranslateUi()
 {
     textLabel->setText(tr("Add cards using the search bar or database tab to have them appear here"));
+}
+
+void VisualDeckEditorPlaceholderWidget::applyInterfaceDefaultFont()
+{
+    // Family comes from the InterfaceDefault theme role; the 14px size stays caller-side.
+    QFont placeholderFont = themeManager->appFont(AppFont::InterfaceDefault);
+    placeholderFont.setPixelSize(14);
+    textLabel->setFont(placeholderFont);
 }

cockatrice/src/interface/widgets/visual_deck_editor/visual_deck_editor_placeholder_widget.h

@@ -15,6 +15,9 @@ public:
     explicit VisualDeckEditorPlaceholderWidget(QWidget *parent = nullptr);
     void retranslateUi();
 
+private slots:
+    void applyInterfaceDefaultFont();
+
 private:
     QVBoxLayout *mainLayout;
     QLabel *imageLabel;