[Fonts] Migrate ChatLog surfaces to theme font role (#7537)

* [Fonts] Migrate ChatLog surfaces to theme font role

* [Fonts] Keep ChatView on the app font and share the report log font

- ChatLog's unset fallback is qApp->font() again: ChatView never set a font
  before the role existed, so an unset role must not switch chat and the game
  log to monospace at the system GeneralFont size.
- Move the monospace fallback the report dialogs used before into
  report_utils::reportLogFont(), which returns the theme's ChatLog role when it
  is set and the old monospace otherwise. tab_report, dlg_my_reports and
  dlg_report_user now share it, so they cannot drift and they honour a themed
  size instead of overriding it.

---------

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

cockatrice/src/interface/widgets/server/chat_view/chat_view.cpp

@@ -4,6 +4,7 @@
 #include "../../client/sound_engine.h"
 #include "../../interface/card_localization.h"
 #include "../../interface/pixel_map_generator.h"
+#include "../../interface/theme_manager.h"
 #include "../../tabs/tab_supervisor.h"
 #include "../user/user_context_menu.h"
 #include "../user/user_list_manager.h"
@@ -63,6 +64,9 @@ ChatView::ChatView(TabSupervisor *_tabSupervisor, AbstractGame *_game, bool _sho
 
     connect(&SettingsCache::instance(), &SettingsCache::themeChanged, this, &ChatView::adjustColorsToPalette);
 
+    applyChatFont();
+    connect(themeManager, &ThemeManager::fontsChanged, this, &ChatView::applyChatFont);
+
     userContextMenu = new UserContextMenu(tabSupervisor, this, game);
     connect(userContextMenu, SIGNAL(openMessageDialog(QString, bool)), this, SIGNAL(openMessageDialog(QString, bool)));
 
@@ -108,6 +112,16 @@ void ChatView::adjustColorsToPalette()
     QTimer::singleShot(0, this, &ChatView::refreshBlockColors);
 }
 
+void ChatView::applyChatFont()
+{
+    // Family comes from the ChatLog theme role; the message char formats carry
+    // no family of their own, so they (and new content) follow the widget and
+    // document default fonts. Weights/italics stay caller-side as before.
+    const QFont chatFont = themeManager->appFont(AppFont::ChatLog);
+    setFont(chatFont);
+    document()->setDefaultFont(chatFont);
+}
+
 void ChatView::refreshBlockColors()
 {
     QTextDocument *doc = document();

cockatrice/src/interface/widgets/server/chat_view/chat_view.h

@@ -111,6 +111,7 @@ private slots:
     void openLink(const QUrl &link);
     void actMessageClicked();
     void adjustColorsToPalette();
+    void applyChatFont();
     void refreshBlockColors();
     void onScrollBarRangeChanged();
     void onScrollBarValueChanged(int value);