[Home] Replace 'Automatic' button color with explicit theme colors default

The Automatic option gated on isBuiltInTheme(): built-in themes used the
theme's accent colors, while non-built-in themes extracted colors from
their own background art. That made the result depend on the theme's
origin rather than what the user actually sees.

Remove Automatic and expose two explicit choices: 'From theme colors'
(always the theme's identity accents, now the default) and 'Extract from
background' (always sample the painted background). Drop the now-unused
isBuiltInTheme() helper.

cmake/FindQtRuntime.cmake

@@ -28,7 +28,7 @@ if(WITH_CLIENT)
   )
 endif()
 if(WITH_ORACLE)
-  set(_ORACLE_NEEDED Concurrent Network Svg Widgets)
+  set(_ORACLE_NEEDED Concurrent Network Svg Widgets Xml)
 endif()
 if(TEST)
   # Union of Qt modules required across all test targets (independent of application targets).

cockatrice/CMakeLists.txt

@@ -382,6 +382,7 @@ set(cockatrice_SOURCES
     src/interface/widgets/tabs/tab_card_art_rules.cpp
     src/interface/widgets/tabs/tab_deck_editor.cpp
     src/interface/widgets/tabs/tab_deck_storage.cpp
+    src/interface/widgets/tabs/tab_developer.cpp
     src/interface/widgets/tabs/tab_game.cpp
     src/interface/widgets/tabs/tab_home.cpp
     src/interface/widgets/tabs/tab_logs.cpp

cockatrice/src/client/network/connection_controller/remote_connection_controller.cpp

@@ -1,5 +1,6 @@
 #include "remote_connection_controller.h"
 
+#include "../../../interface/pixel_map_generator.h"
 #include "../../settings/cache_settings.h"
 #include "../interface/widgets/dialogs/dlg_connect.h"
 #include "../interface/widgets/dialogs/dlg_forgot_password_challenge.h"
@@ -180,7 +181,7 @@ void ConnectionController::onServerShutdownEvent(const Event_ServerShutdown &eve
                                                    "games will be lost.\nReason for shutdown: %1",
                                                    "", event.minutes())
                                                     .arg(QString::fromStdString(event.reason())));
-    serverShutdownMessageBox.setIconPixmap(QPixmap("theme:cockatrice").scaled(64, 64));
+    serverShutdownMessageBox.setIconPixmap(themePixmap(QStringLiteral("cockatrice")).scaled(64, 64));
     serverShutdownMessageBox.setText(tr("Scheduled server shutdown"));
     serverShutdownMessageBox.setWindowModality(Qt::ApplicationModal);
     serverShutdownMessageBox.setVisible(true);

cockatrice/src/filters/filter_builder.cpp

@@ -1,5 +1,6 @@
 #include "filter_builder.h"
 
+#include "../interface/pixel_map_generator.h"
 #include "../interface/widgets/utility/custom_line_edit.h"
 
 #include <QComboBox>
@@ -21,7 +22,7 @@ FilterBuilder::FilterBuilder(QWidget *parent) : QWidget(parent)
         typeCombo->addItem(CardFilter::typeName(static_cast<CardFilter::Type>(i)), QVariant(i));
     }
 
-    QPushButton *ok = new QPushButton(QPixmap("theme:icons/increment"), QString());
+    QPushButton *ok = new QPushButton(themePixmap(QStringLiteral("icons/increment")), QString());
     ok->setObjectName("ok");
     ok->setMaximumSize(20, 20);
 

cockatrice/src/game_graphics/hand_counter.cpp

@@ -1,5 +1,6 @@
 #include "hand_counter.h"
 
+#include "../interface/pixel_map_generator.h"
 #include "zones/card_zone.h"
 
 #include <QGraphicsSceneMouseEvent>
@@ -32,7 +33,8 @@ void HandCounter::paint(QPainter *painter, const QStyleOptionGraphicsItem * /*op
     QSize translatedSize = painter->combinedTransform().mapRect(boundingRect()).size().toSize();
     QPixmap cachedPixmap;
     if (!QPixmapCache::find("handCounter" + QString::number(translatedSize.width()), &cachedPixmap)) {
-        cachedPixmap = QPixmap("theme:hand").scaled(translatedSize, Qt::KeepAspectRatio, Qt::SmoothTransformation);
+        cachedPixmap =
+            themePixmap(QStringLiteral("hand")).scaled(translatedSize, Qt::KeepAspectRatio, Qt::SmoothTransformation);
         QPixmapCache::insert("handCounter" + QString::number(translatedSize.width()), cachedPixmap);
     }
     resetPainterTransform(painter);

cockatrice/src/game_graphics/player/player_list_widget.cpp

@@ -53,13 +53,13 @@ PlayerListWidget::PlayerListWidget(TabSupervisor *_tabSupervisor,
                                    QWidget *parent)
     : QTreeWidget(parent), tabSupervisor(_tabSupervisor), client(_client), game(_game), gameStarted(false)
 {
-    readyIcon = QPixmap("theme:icons/ready_start");
-    notReadyIcon = QPixmap("theme:icons/not_ready_start");
-    concededIcon = QPixmap("theme:icons/conceded");
+    readyIcon = themePixmap(QStringLiteral("icons/ready_start"));
+    notReadyIcon = themePixmap(QStringLiteral("icons/not_ready_start"));
+    concededIcon = themePixmap(QStringLiteral("icons/conceded"));
     playerIcon = loadColorAdjustedPixmap("theme:icons/player");
     judgeIcon = loadColorAdjustedPixmap("theme:icons/scales");
     spectatorIcon = loadColorAdjustedPixmap("theme:icons/spectator");
-    lockIcon = QPixmap("theme:icons/lock");
+    lockIcon = themePixmap(QStringLiteral("icons/lock"));
 
     if (tabSupervisor) {
         itemDelegate = new PlayerListItemDelegate(this);

cockatrice/src/game_graphics/zones/view_zone_widget.cpp

@@ -62,7 +62,7 @@ ZoneViewWidget::ZoneViewWidget(PlayerLogic *_player,
         searchEdit.setPlaceholderText(tr("Search by card name (or search expressions)"));
         searchEdit.setClearButtonEnabled(true);
         searchEdit.addAction(loadColorAdjustedPixmap("theme:icons/search"), QLineEdit::LeadingPosition);
-        auto help = searchEdit.addAction(QPixmap("theme:icons/info"), QLineEdit::TrailingPosition);
+        auto help = searchEdit.addAction(themePixmap(QStringLiteral("icons/info")), QLineEdit::TrailingPosition);
 
         connect(help, &QAction::triggered, this, [this] { createSearchSyntaxHelpWindow(&searchEdit); });
 
@@ -549,7 +549,7 @@ void ZoneViewWidget::initStyleOption(QStyleOption *option) const
 {
     QStyleOptionTitleBar *titleBar = qstyleoption_cast<QStyleOptionTitleBar *>(option);
     if (titleBar) {
-        titleBar->icon = QPixmap("theme:cockatrice");
+        titleBar->icon = themePixmap(QStringLiteral("cockatrice"));
     }
 }
 

cockatrice/src/interface/card_picture_loader/card_picture_loader.cpp

@@ -1,6 +1,7 @@
 #include "card_picture_loader.h"
 
 #include "../../client/settings/cache_settings.h"
+#include "../pixel_map_generator.h"
 #include "card_picture_loader_cache_method.h"
 #include "card_picture_loader_local_schemes.h"
 
@@ -62,7 +63,7 @@ void CardPictureLoader::getCardBackPixmap(QPixmap &pixmap, QSize size)
     QString backCacheKey = "_trice_card_back_" + QString::number(size.width()) + "x" + QString::number(size.height());
     if (!QPixmapCache::find(backCacheKey, &pixmap)) {
         qCDebug(CardPictureLoaderLog) << "PictureLoader: cache miss for" << backCacheKey;
-        QPixmap tmpPixmap("theme:cardback");
+        QPixmap tmpPixmap = themePixmap(QStringLiteral("cardback"));
 
         if (tmpPixmap.isNull()) {
             qCWarning(CardPictureLoaderLog) << "Failed to load 'theme:cardback'! Using fallback pixmap.";
@@ -83,7 +84,7 @@ void CardPictureLoader::getCardBackLoadingInProgressPixmap(QPixmap &pixmap, QSiz
         "_trice_card_back_inprogress_" + QString::number(size.width()) + "x" + QString::number(size.height());
     if (!QPixmapCache::find(backCacheKey, &pixmap)) {
         qCDebug(CardPictureLoaderCardBackCacheFailLog) << "PictureLoader: cache miss for" << backCacheKey;
-        QPixmap tmpPixmap("theme:cardback");
+        QPixmap tmpPixmap = themePixmap(QStringLiteral("cardback"));
 
         if (tmpPixmap.isNull()) {
             qCWarning(CardPictureLoaderLog) << "Failed to load 'theme:cardback' for in-progress state! Using fallback.";
@@ -105,7 +106,7 @@ void CardPictureLoader::getCardBackLoadingFailedPixmap(QPixmap &pixmap, QSize si
         "_trice_card_back_failed_" + QString::number(size.width()) + "x" + QString::number(size.height());
     if (!QPixmapCache::find(backCacheKey, &pixmap)) {
         qCDebug(CardPictureLoaderCardBackCacheFailLog) << "PictureLoader: cache miss for" << backCacheKey;
-        QPixmap tmpPixmap("theme:cardback");
+        QPixmap tmpPixmap = themePixmap(QStringLiteral("cardback"));
 
         if (tmpPixmap.isNull()) {
             qCWarning(CardPictureLoaderLog) << "Failed to load 'theme:cardback' for failed state! Using fallback.";

cockatrice/src/interface/palette_editor/palette_editor_dialog.cpp

@@ -1,6 +1,5 @@
 #include "palette_editor_dialog.h"
 
-#include "../../client/settings/cache_settings.h"
 #include "../theme_manager.h"
 #include "palette_generator.h"
 #include "palette_grid_widget.h"
@@ -11,31 +10,11 @@
 #include <QDialogButtonBox>
 #include <QDir>
 #include <QFile>
-#include <QFileInfo>
 #include <QFrame>
-#include <QGuiApplication>
 #include <QLabel>
-#include <QLoggingCategory>
 #include <QMessageBox>
 #include <QPushButton>
-#include <QStyleHints>
 #include <QTimer>
-#include <libcockatrice/settings/paths_settings.h>
-
-// Probe whether a directory is truly writable by trying to create and remove a
-// temporary file. QFileInfo::isWritable() on a directory is unreliable (notably
-// on Windows where UAC VirtualStore can make a system dir appear writable).
-static bool isDirReallyWritable(const QString &dirPath)
-{
-    const QString probe = QDir(dirPath).absoluteFilePath(".cockatrice_write_test");
-    QFile f(probe);
-    if (!f.open(QIODevice::WriteOnly)) {
-        return false;
-    }
-    f.close();
-    f.remove();
-    return true;
-}
 
 PaletteEditorDialog::PaletteEditorDialog(const QString &_themeDirPath, const QString &_themeName, QWidget *parent)
     : QDialog(parent), themeDirPath(_themeDirPath), themeName(_themeName)
@@ -46,14 +25,7 @@ PaletteEditorDialog::PaletteEditorDialog(const QString &_themeDirPath, const QSt
     // Resolve a writable directory for saving. Built-in (Default / Fusion) and
     // other read-only theme directories must be customised in the user-writable
     // themes directory; otherwise the write would fail or be lost on upgrade.
-    if (!themeDirPath.isEmpty() && isDirReallyWritable(themeDirPath)) {
-        saveDir = themeDirPath;
-    } else {
-        saveDir = QDir(SettingsCache::instance().paths().getThemesPath()).absoluteFilePath(themeName);
-        if (!QDir().mkpath(saveDir)) {
-            qWarning() << "Failed to create palette save directory:" << saveDir;
-        }
-    }
+    saveDir = ThemeManager::writableThemeDir(themeName);
 
     // Load both scheme configs upfront so switching is instant
     loadSchemes();
@@ -214,7 +186,7 @@ void PaletteEditorDialog::retranslateUi()
     resetBtn->setToolTip(tr("Discard unsaved edits and restore the last saved palette"));
     saveBtn->setToolTip(tr("Write palette-%1.toml and reload the theme").arg(loadedScheme.toLower()));
 
-    if (saveDir.isEmpty() || !isDirReallyWritable(saveDir)) {
+    if (saveDir.isEmpty() || !ThemeManager::isDirReallyWritable(saveDir)) {
         saveBtn->setEnabled(false);
         saveBtn->setToolTip(tr("Cannot save: this theme has no writable directory"));
     }
@@ -297,7 +269,7 @@ void PaletteEditorDialog::onSave()
         if (it.key() == loadedScheme) {
             continue;
         }
-        if (it.value().colors == savedConfig.value(it.key()).colors) {
+        if (it.value() == savedConfig.value(it.key())) {
             continue;
         }
         if (!ThemeManager::commitPalette(saveDir, it.key(), it.value())) {
@@ -308,7 +280,7 @@ void PaletteEditorDialog::onSave()
     }
 
     // Commit the active scheme last so the global colour scheme matches.
-    if (workingConfig[loadedScheme].colors != savedConfig.value(loadedScheme).colors) {
+    if (workingConfig[loadedScheme] != savedConfig.value(loadedScheme)) {
         if (!ThemeManager::commitPalette(saveDir, loadedScheme, workingConfig[loadedScheme])) {
             QMessageBox::warning(this, tr("Save failed"),
                                  tr("Could not write %1 to:\n%2").arg(PaletteConfig::fileName(loadedScheme), saveDir));

cockatrice/src/interface/palette_editor/palette_generator.cpp

@@ -150,6 +150,17 @@ PaletteConfig fromAccent(const QColor &accent, int intensity, const QString &sch
     cfg.colors[CG::Disabled][CR::HighlightedText] = disText;
     cfg.colors[CG::Inactive][CR::HighlightedText] = dark ? Qt::white : Qt::black;
 
+    // Accent: same primary hue as Highlight, so palettes derived from a
+    // QuickSetup accent always carry a matching Accent role.
+#if QT_VERSION >= QT_VERSION_CHECK(6, 6, 0)
+    set3(CR::Accent, hl, disText, hl);
+#endif
+
+    // Application role colors: Strong tracks the primary accent, while Soft is
+    // the lightened, desaturated companion used for button-gradient highlights.
+    cfg.appColors[AppColor::AccentStrong] = hl;
+    cfg.appColors[AppColor::AccentSoft] = hsl(accent.lightness() + 60, qRound(accent.hslSaturation() * 70 / 100.0));
+
     // BrightText
     QColor bright;
     if (achromatic) {

cockatrice/src/interface/palette_editor/palette_grid_widget.cpp

@@ -1,5 +1,7 @@
 #include "palette_grid_widget.h"
 
+#include "../theme_manager.h"
+
 #include <QApplication>
 #include <QGridLayout>
 #include <QLabel>
@@ -45,6 +47,11 @@ static const QMap<QPalette::ColorRole, const char *> ROLE_DESCRIPTIONS = {
     {QPalette::Shadow, QT_TR_NOOP("Very dark shadow colour")},
 };
 
+static const QMap<AppColor::Role, const char *> APP_ROLE_DESCRIPTIONS = {
+    {AppColor::AccentStrong, QT_TR_NOOP("Vivid primary accent (e.g. home-tab button gradient start)")},
+    {AppColor::AccentSoft, QT_TR_NOOP("Lightened, desaturated accent (e.g. home-tab button gradient end)")},
+};
+
 PaletteGridWidget::PaletteGridWidget(QWidget *parent) : QWidget(parent)
 {
     scroll = new QScrollArea(this);
@@ -122,6 +129,46 @@ void PaletteGridWidget::buildGrid(QWidget *host)
             grid->addWidget(btn, row + 1, col + 1, Qt::AlignHCenter | Qt::AlignVCenter);
         }
     }
+
+    // Application color section: one ColorButton per role below the role grid.
+    // These are not tied to a color group, so a single button spans the row.
+    QMetaEnum appEnum = QMetaEnum::fromType<AppColor::Role>();
+
+    const int appHeaderRow = roles.size() + 1;
+
+    auto *appHeader = new QLabel(tr("App colors"), host);
+    appHeader->setToolTip(tr("Application-specific colors layered on top of the Qt palette"));
+    QFont appHeaderFont = appHeader->font();
+    appHeaderFont.setBold(true);
+    appHeader->setFont(appHeaderFont);
+    appHeader->setAutoFillBackground(true);
+    appHeader->setContentsMargins(4, 4, 4, 4);
+    grid->addWidget(appHeader, appHeaderRow, 0, 1, 4);
+    headerLabels.append(appHeader);
+
+    for (int i = 0; i < appEnum.keyCount(); ++i) {
+        auto role = static_cast<AppColor::Role>(appEnum.value(i));
+        const int row = appHeaderRow + 1 + i;
+
+        if (i % 2 == 0) {
+            for (int col = 0; col < 4; ++col) {
+                auto *shade = new QWidget(host);
+                shade->setAutoFillBackground(true);
+                grid->addWidget(shade, row, col);
+                rowShadeWidgets.push_back(shade);
+            }
+        }
+
+        auto *label = new QLabel(QString(appEnum.valueToKey(role)), host);
+        label->setToolTip(APP_ROLE_DESCRIPTIONS.value(role, {}));
+        label->setContentsMargins(4, 2, 8, 2);
+        grid->addWidget(label, row, 0);
+
+        auto *btn = new ColorButton(host);
+        connect(btn, &ColorButton::colorChanged, this, [this] { emit paletteChanged(); });
+        appColorButtons[role] = btn;
+        grid->addWidget(btn, row, 1, Qt::AlignHCenter | Qt::AlignVCenter);
+    }
 }
 
 void PaletteGridWidget::changeEvent(QEvent *e)
@@ -166,6 +213,16 @@ void PaletteGridWidget::loadPalette(const PaletteConfig &cfg)
             colorButtons[group][role]->setColor(color);
         }
     }
+
+    QMetaEnum appEnum = QMetaEnum::fromType<AppColor::Role>();
+    for (int i = 0; i < appEnum.keyCount(); ++i) {
+        auto role = static_cast<AppColor::Role>(appEnum.value(i));
+        QColor color = cfg.appColors.value(role);
+        if (!color.isValid()) {
+            color = themeManager->appColor(role);
+        }
+        appColorButtons[role]->setColor(color);
+    }
 }
 
 PaletteConfig PaletteGridWidget::currentPaletteConfig() const
@@ -176,5 +233,12 @@ PaletteConfig PaletteGridWidget::currentPaletteConfig() const
             cfg.colors[group][role] = colorButtons[group][role]->getColor();
         }
     }
+
+    QMetaEnum appEnum = QMetaEnum::fromType<AppColor::Role>();
+    for (int i = 0; i < appEnum.keyCount(); ++i) {
+        auto role = static_cast<AppColor::Role>(appEnum.value(i));
+        cfg.appColors[role] = appColorButtons[role]->getColor();
+    }
+
     return cfg;
 }

cockatrice/src/interface/palette_editor/palette_grid_widget.h

@@ -31,6 +31,7 @@ private:
     void refreshChromePalettes();
 
     QMap<QPalette::ColorGroup, QMap<QPalette::ColorRole, ColorButton *>> colorButtons;
+    QMap<AppColor::Role, ColorButton *> appColorButtons;
     QScrollArea *scroll;
     QWidget *gridHost;
     QVBoxLayout *layout;

cockatrice/src/interface/pixel_map_generator.cpp

@@ -1,5 +1,7 @@
 #include "pixel_map_generator.h"
 
+#include "theme_manager.h"
+
 #include <QApplication>
 #include <QDomDocument>
 #include <QFile>
@@ -14,6 +16,7 @@
 #define DEFAULT_COLOR_MODERATOR_LEFT "#ffffff";
 #define DEFAULT_COLOR_MODERATOR_RIGHT "#000000";
 #define DEFAULT_COLOR_ADMIN "#ff2701";
+#define DEFAULT_COLOR_DEVELOPER "#B8B8B8"
 
 /**
  * Clamps an svg render size so that rendering does not exceed a multiple of the requested size.
@@ -82,7 +85,13 @@ static QPixmap loadSvg(const QString &svgPath, const QSize &size, bool expandOnl
 /**
  * Try to load path image from non-SVG formats, otherwise fall back to SVG.
  * This is to allow custom themes to support non-SVG format type overrides, since SVG requires custom loading.
- * @param path The path to the file, with no file extension. File formats will be automatically detected.
+ *
+ * The path may already carry the resolved file extension (e.g. via
+ * ThemeManager::assetPath); such paths are loaded directly. Otherwise a
+ * format-agnostic lookup probes png, jpg and finally svg.
+ *
+ * @param path The path to the file, with no file extension unless the caller
+ * already resolved it. File formats will be automatically detected.
  * @param size The desired size of the pixmap.
  * @param expandOnly If true, then keep the size of the initial pixmap to at least the size (Only relevant if SVG).
  *
@@ -90,6 +99,19 @@ static QPixmap loadSvg(const QString &svgPath, const QSize &size, bool expandOnl
  */
 static QPixmap tryLoadImage(const QString &path, const QSize &size, bool expandOnly = false)
 {
+    if (path.endsWith(QLatin1String(".svg"), Qt::CaseInsensitive)) {
+        return loadSvg(path, size, expandOnly);
+    }
+    if (path.endsWith(QLatin1String(".png"), Qt::CaseInsensitive) ||
+        path.endsWith(QLatin1String(".jpg"), Qt::CaseInsensitive) ||
+        path.endsWith(QLatin1String(".jpeg"), Qt::CaseInsensitive)) {
+        QPixmap pix(path);
+        if (!pix.isNull()) {
+            return pix.scaled(size, Qt::KeepAspectRatio, Qt::SmoothTransformation);
+        }
+        return {};
+    }
+
     const auto formats = {"png", "jpg"};
 
     QPixmap returnPixmap;
@@ -111,7 +133,8 @@ QPixmap PhasePixmapGenerator::generatePixmap(int height, QString name)
         return pmCache.value(key);
     }
 
-    QPixmap pixmap = tryLoadImage("theme:phases/" + name, QSize(height, height));
+    QPixmap pixmap = tryLoadImage(QStringLiteral("theme:") + themeManager->assetPath(QStringLiteral("phases/") + name),
+                                  QSize(height, height));
 
     pmCache.insert(key, pixmap);
     return pixmap;
@@ -359,6 +382,8 @@ QIcon UserLevelPixmapGenerator::generateIconDefault(int height,
 
     if (userLevel.testFlag(ServerInfo_User::IsAdmin)) {
         colorLeft = DEFAULT_COLOR_ADMIN;
+    } else if (userLevel.testFlag(ServerInfo_User::IsDeveloper)) {
+        colorLeft = DEFAULT_COLOR_DEVELOPER;
     } else if (userLevel.testFlag(ServerInfo_User::IsModerator)) {
         colorLeft = DEFAULT_COLOR_MODERATOR_LEFT;
         colorRight = DEFAULT_COLOR_MODERATOR_RIGHT;
@@ -396,7 +421,8 @@ QPixmap LockPixmapGenerator::generatePixmap(int height)
         return pmCache.value(key);
     }
 
-    QPixmap pixmap = tryLoadImage("theme:icons/lock", QSize(height, height), true);
+    QPixmap pixmap = tryLoadImage(QStringLiteral("theme:") + themeManager->assetPath(QStringLiteral("icons/lock")),
+                                  QSize(height, height), true);
     pmCache.insert(key, pixmap);
     return pixmap;
 }
@@ -411,7 +437,8 @@ QPixmap DropdownIconPixmapGenerator::generatePixmap(int height, bool expanded)
     }
 
     QString name = expanded ? "dropdown_expanded" : "dropdown_collapsed";
-    QPixmap pixmap = tryLoadImage("theme:icons/" + name, QSize(height, height), true);
+    QPixmap pixmap = tryLoadImage(QStringLiteral("theme:") + themeManager->assetPath(QStringLiteral("icons/") + name),
+                                  QSize(height, height), true);
 
     pmCache.insert(key, pixmap);
     return pixmap;
@@ -472,6 +499,13 @@ QHash<QString, QPixmap> ManaSymbolPixmapGenerator::scaledCache;
 
 QPixmap loadColorAdjustedPixmap(const QString &name)
 {
+    // Prefer an authored scheme-qualified variant when one exists for this asset.
+    const QString variant = themeManager->schemeVariantPath(QStringView(name).mid(QStringLiteral("theme:").size()));
+    if (!variant.isEmpty()) {
+        return QPixmap(QStringLiteral("theme:") + variant);
+    }
+
+    // Legacy fallback: runtime-invert for dark mode when no authored variant.
     if (qApp->palette().windowText().color().lightness() > 200) {
         QImage img(name);
         img.invertPixels();
@@ -482,3 +516,21 @@ QPixmap loadColorAdjustedPixmap(const QString &name)
         return QPixmap(name);
     }
 }
+
+QPixmap themePixmap(QStringView prefix)
+{
+    const QString resolved = themeManager->assetPath(prefix);
+    return QPixmap(QStringLiteral("theme:") + resolved);
+}
+
+void clearPixmapGeneratorCaches()
+{
+    PhasePixmapGenerator::clear();
+    CounterPixmapGenerator::clear();
+    PingPixmapGenerator::clear();
+    CountryPixmapGenerator::clear();
+    UserLevelPixmapGenerator::clear();
+    LockPixmapGenerator::clear();
+    DropdownIconPixmapGenerator::clear();
+    ManaSymbolPixmapGenerator::clear();
+}

cockatrice/src/interface/pixel_map_generator.h

@@ -156,4 +156,15 @@ public:
 
 QPixmap loadColorAdjustedPixmap(const QString &name);
 
+// Loads a "theme:" asset (with no file extension in prefix), preferring the
+// scheme-qualified variant (prefix-dark / prefix-light, resolved via
+// ThemeManager::assetPath) and falling back to the plain asset. Callers load
+// the returned path directly. Use for scheme-sensitive pixmaps like
+// backgrounds, the card back, and the app logo.
+QPixmap themePixmap(QStringView prefix);
+
+// Clears every PixmapGenerator's static cache so scheme variants are
+// re-resolved when the active theme or color scheme changes.
+void clearPixmapGeneratorCaches();
+
 #endif

cockatrice/src/interface/theme_config.cpp

@@ -96,7 +96,7 @@ bool ThemeConfig::save(const QString &themeDirPath) const
 
 bool PaletteConfig::hasPalette() const
 {
-    return !colors.isEmpty();
+    return !colors.isEmpty() || !appColors.isEmpty();
 }
 
 QString PaletteConfig::toToml() const
@@ -133,6 +133,24 @@ QString PaletteConfig::toToml() const
         out += "\n";
     }
 
+    if (!appColors.isEmpty()) {
+        QMetaEnum appEnum = QMetaEnum::fromType<AppColor::Role>();
+
+        out += "[AppColors]\n";
+
+        for (auto it = appColors.cbegin(); it != appColors.cend(); ++it) {
+            const char *roleName = appEnum.valueToKey(it.key());
+
+            if (!roleName) {
+                continue;
+            }
+
+            out += QString("%1 = %2\n").arg(QString(roleName), -20).arg(it.value().name(QColor::HexArgb));
+        }
+
+        out += "\n";
+    }
+
     return out;
 }
 
@@ -152,6 +170,7 @@ PaletteConfig PaletteConfig::fromFile(const QString &filePath)
     }
 
     QMetaEnum roleEnum = QMetaEnum::fromType<QPalette::ColorRole>();
+    QMetaEnum appEnum = QMetaEnum::fromType<AppColor::Role>();
 
     QString currentSection;
     QPalette::ColorGroup currentGroup = QPalette::Active;
@@ -202,6 +221,26 @@ PaletteConfig PaletteConfig::fromFile(const QString &filePath)
             }
         }
 
+        QColor color(value);
+
+        if (!color.isValid()) {
+            continue;
+        }
+
+        if (currentSection.compare("AppColors", Qt::CaseInsensitive) == 0) {
+            if (key.startsWith("AppColor::")) {
+                key = key.mid(10);
+            }
+
+            int appRoleInt = appEnum.keyToValue(key.toUtf8().constData());
+
+            if (appRoleInt >= 0) {
+                cfg.appColors[static_cast<AppColor::Role>(appRoleInt)] = color;
+            }
+
+            continue;
+        }
+
         if (!currentSection.startsWith("Palette", Qt::CaseInsensitive)) {
             continue;
         }
@@ -216,11 +255,7 @@ PaletteConfig PaletteConfig::fromFile(const QString &filePath)
             continue;
         }
 
-        QColor color(value);
-
-        if (color.isValid()) {
-            cfg.colors[currentGroup][static_cast<QPalette::ColorRole>(roleInt)] = color;
-        }
+        cfg.colors[currentGroup][static_cast<QPalette::ColorRole>(roleInt)] = color;
     }
 
     return cfg;

cockatrice/src/interface/theme_config.h

@@ -3,9 +3,25 @@
 
 #include <QColor>
 #include <QMap>
+#include <QObject>
 #include <QPalette>
 #include <QString>
 
+// Application-specific color roles, layered on top of the fixed QPalette role
+// set. Stored in the same palette-<scheme>.toml under an [AppColors] section
+// and editable from the palette editor, so theme authors can control colors
+// beyond what Qt's palette can express.
+namespace AppColor
+{
+Q_NAMESPACE
+enum Role
+{
+    AccentStrong,
+    AccentSoft,
+};
+Q_ENUM_NS(Role)
+} // namespace AppColor
+
 struct ThemeConfig
 {
     QString colorScheme;
@@ -21,7 +37,16 @@ struct ThemeConfig
 struct PaletteConfig
 {
     QMap<QPalette::ColorGroup, QMap<QPalette::ColorRole, QColor>> colors;
+    QMap<AppColor::Role, QColor> appColors;
 
+    bool operator==(const PaletteConfig &rhs) const
+    {
+        return colors == rhs.colors && appColors == rhs.appColors;
+    }
+    bool operator!=(const PaletteConfig &rhs) const
+    {
+        return !(*this == rhs);
+    }
     bool hasPalette() const;
     QString toToml() const;
 

cockatrice/src/interface/theme_manager.cpp

@@ -1,10 +1,13 @@
 #include "theme_manager.h"
 
 #include "../../client/settings/cache_settings.h"
+#include "pixel_map_generator.h"
 
 #include <QApplication>
 #include <QColor>
 #include <QDebug>
+#include <QFile>
+#include <QFileInfo>
 #include <QLibraryInfo>
 #include <QMap>
 #include <QMetaEnum>
@@ -140,11 +143,74 @@ bool ThemeManager::isDarkMode(const QString &themeDirPath) const
     }
 }
 
-bool ThemeManager::isBuiltInTheme()
+QString ThemeManager::schemeVariantPath(QStringView prefix) const
 {
-    const auto themeName = SettingsCache::instance().getThemeName();
+    static const QStringList formats = {QStringLiteral(".png"), QStringLiteral(".jpg"), QStringLiteral(".jpeg"),
+                                        QStringLiteral(".svg")};
+    const QString scheme = isDarkMode(currentThemePath) ? QStringLiteral("dark") : QStringLiteral("light");
+    const QString variantStem = prefix.toString() + QLatin1Char('-') + scheme;
 
-    return themeName == NONE_THEME_NAME || themeName == FUSION_THEME_NAME;
+    for (const QString &format : formats) {
+        if (QFileInfo::exists(QStringLiteral("theme:") + variantStem + format)) {
+            return variantStem + format;
+        }
+    }
+    return QString();
+}
+
+QString ThemeManager::assetPath(QStringView prefix) const
+{
+    // Probe order mirrors tryLoadImage: a theme may override the default SVG
+    // with a raster of the same stem, so raster wins over SVG within a stem.
+    static const QStringList formats = {QStringLiteral(".png"), QStringLiteral(".jpg"), QStringLiteral(".jpeg"),
+                                        QStringLiteral(".svg")};
+
+    auto findExisting = [](const QString &stem) {
+        for (const QString &format : formats) {
+            if (QFileInfo::exists(QStringLiteral("theme:") + stem + format)) {
+                return stem + format;
+            }
+        }
+        return QString();
+    };
+
+    // Prefer the scheme-qualified variant when it exists, else the plain
+    // asset as the super fallback. Both return the resolved path including
+    // its file extension so callers can load it directly.
+    const QString variant = schemeVariantPath(prefix);
+    if (!variant.isEmpty()) {
+        return variant;
+    }
+    const QString resolvedPlain = findExisting(prefix.toString());
+    return resolvedPlain.isEmpty() ? prefix.toString() : resolvedPlain;
+}
+
+// Probe whether a directory is truly writable by trying to create and remove a
+// temporary file. QFileInfo::isWritable() on a directory is unreliable (notably
+// on Windows where UAC VirtualStore can make a system dir appear writable).
+bool ThemeManager::isDirReallyWritable(const QString &dirPath)
+{
+    const QString probe = QDir(dirPath).absoluteFilePath(".cockatrice_write_test");
+    QFile f(probe);
+    if (!f.open(QIODevice::WriteOnly)) {
+        return false;
+    }
+    f.close();
+    f.remove();
+    return true;
+}
+
+QString ThemeManager::writableThemeDir(const QString &themeName)
+{
+    // All theme writes go to the user themes directory regardless of whether
+    // the resolved (system) theme directory happens to be writable. Even when a
+    // write would succeed in-place, routing it to the user directory keeps the
+    // install intact and guarantees changes survive upgrades.
+    const QString dirPath = QDir(SettingsCache::instance().paths().getThemesPath()).absoluteFilePath(themeName);
+    if (!QDir().mkpath(dirPath)) {
+        qWarning() << "Failed to create theme save directory:" << dirPath;
+    }
+    return dirPath;
 }
 
 // System (read-only) themes location, relative to the application binary.
@@ -195,7 +261,7 @@ QStringMap &ThemeManager::getAvailableThemes()
 QBrush ThemeManager::loadBrush(QString fileName, QColor fallbackColor)
 {
     QBrush brush;
-    QPixmap tmp = QPixmap("theme:zones/" + fileName);
+    QPixmap tmp = QPixmap("theme:" + assetPath(QStringLiteral("zones/") + fileName));
     if (tmp.isNull()) {
         brush.setColor(fallbackColor);
         brush.setStyle(Qt::SolidPattern);
@@ -209,7 +275,7 @@ QBrush ThemeManager::loadBrush(QString fileName, QColor fallbackColor)
 QBrush ThemeManager::loadExtraBrush(QString fileName, QBrush &fallbackBrush)
 {
     QBrush brush;
-    QPixmap tmp = QPixmap("theme:zones/" + fileName);
+    QPixmap tmp = QPixmap("theme:" + assetPath(QStringLiteral("zones/") + fileName));
 
     if (tmp.isNull()) {
         brush = fallbackBrush;
@@ -287,7 +353,7 @@ bool ThemeManager::commitPalette(const QString &themeDirPath, const QString &col
 
 void ThemeManager::setColorScheme(const QString &scheme)
 {
-    const QString dirPath = getAvailableThemes().value(SettingsCache::instance().getThemeName());
+    const QString dirPath = writableThemeDir(SettingsCache::instance().getThemeName());
     ThemeConfig cfg = ThemeConfig::fromThemeDir(dirPath);
 
     cfg.colorScheme = scheme;
@@ -298,7 +364,7 @@ void ThemeManager::setColorScheme(const QString &scheme)
 
 void ThemeManager::setStyleName(const QString &styleName)
 {
-    const QString dirPath = getAvailableThemes().value(SettingsCache::instance().getThemeName());
+    const QString dirPath = writableThemeDir(SettingsCache::instance().getThemeName());
     ThemeConfig cfg = ThemeConfig::fromThemeDir(dirPath);
 
     cfg.styleName = styleName;
@@ -372,6 +438,8 @@ void ThemeManager::applyStyleAndPalette(const QString &themeName,
     qApp->setPalette(base);
     qApp->setStyle(style);
 
+    currentAppColors = palCfg.appColors;
+
     // Force every widget to re-polish and repaint immediately rather than
     // waiting for natural expose events, which produces a patchwork of old
     // and new colours during a live preview.
@@ -384,6 +452,35 @@ void ThemeManager::applyStyleAndPalette(const QString &themeName,
         style->polish(widget);
         widget->update();
     }
+
+    emit paletteChanged();
+}
+
+QColor ThemeManager::appColor(AppColor::Role role) const
+{
+    const auto it = currentAppColors.constFind(role);
+    if (it != currentAppColors.constEnd()) {
+        return it.value();
+    }
+
+    // QPalette::Accent was introduced in Qt 6.6 and several shipped palettes
+    // set it to a value barely distinguishable from Window, so it is not a
+    // reliable accent source. The selection highlight is the stable accent
+    // (Accent defaults to Highlight when unset), and deriving from it
+    // unconditionally keeps every Qt version rendering identically.
+    const QColor accent = qApp->palette().color(QPalette::Active, QPalette::Highlight);
+
+    if (role == AppColor::AccentSoft) {
+        constexpr int SOFT_SATURATION_PERCENT = 70;
+        constexpr int SOFT_LIGHTNESS_OFFSET = 60;
+
+        // Light end of the gradient: same hue, softened and lightened
+        return QColor::fromHsl(qMax(0, accent.hslHue()),
+                               qBound(0, qRound(accent.hslSaturation() * SOFT_SATURATION_PERCENT / 100.0), 255),
+                               qBound(0, accent.lightness() + SOFT_LIGHTNESS_OFFSET, 255));
+    }
+
+    return accent;
 }
 
 void ThemeManager::themeChangedSlot()
@@ -393,9 +490,19 @@ void ThemeManager::themeChangedSlot()
     currentThemePath = dirPath;
     QDir dir(dirPath);
 
-    // CSS
-    if (!dirPath.isEmpty() && dir.exists(STYLE_CSS_NAME)) {
-        qApp->setStyleSheet("file:///" + dir.absoluteFilePath(STYLE_CSS_NAME));
+    // CSS — prefer the scheme-qualified stylesheet (style-dark.css /
+    // style-light.css) when present, else the plain style.css as fallback.
+    if (!dirPath.isEmpty()) {
+        const QString scheme = isDarkMode(dirPath) ? QStringLiteral("dark") : QStringLiteral("light");
+        const QString schemeCss = QFileInfo(QStringLiteral(STYLE_CSS_NAME)).completeBaseName() + QLatin1Char('-') +
+                                  scheme + QStringLiteral(".css");
+        if (dir.exists(schemeCss)) {
+            qApp->setStyleSheet("file:///" + dir.absoluteFilePath(schemeCss));
+        } else if (dir.exists(STYLE_CSS_NAME)) {
+            qApp->setStyleSheet("file:///" + dir.absoluteFilePath(STYLE_CSS_NAME));
+        } else {
+            qApp->setStyleSheet("");
+        }
     } else {
         qApp->setStyleSheet("");
     }
@@ -410,8 +517,19 @@ void ThemeManager::themeChangedSlot()
 
     // ── Load palette: custom first, then theme default ────────────────────
     PaletteConfig palette = PaletteConfig::fromScheme(dirPath, activeScheme);
-    if (!palette.hasPalette()) {
-        palette = ThemeManager::loadDefaultPaletteConfig(dirPath, themeName, activeScheme);
+    const PaletteConfig themeDefault = ThemeManager::loadDefaultPaletteConfig(dirPath, themeName, activeScheme);
+    if (palette.hasPalette()) {
+        // A custom palette written before [AppColors] existed carries no app
+        // colors; merge the theme's shipped defaults so the identity colors
+        // survive (hasPalette() counts an app-colors-only file as a palette,
+        // so those are kept wholesale and never reach here empty).
+        for (auto it = themeDefault.appColors.cbegin(); it != themeDefault.appColors.cend(); ++it) {
+            if (!palette.appColors.contains(it.key())) {
+                palette.appColors.insert(it.key(), it.value());
+            }
+        }
+    } else {
+        palette = themeDefault;
     }
 
     applyStyleAndPalette(themeName, themeCfg, palette, activeScheme);
@@ -446,6 +564,7 @@ void ThemeManager::themeChangedSlot()
     }
 
     QPixmapCache::clear();
+    clearPixmapGeneratorCaches();
 
     emit themeChanged();
 }

cockatrice/src/interface/theme_manager.h

@@ -50,6 +50,7 @@ private:
     QString currentThemePath;
     std::array<QBrush, Role::MaxRole + 1> brushes;
     QStringMap availableThemes;
+    QMap<AppColor::Role, QColor> currentAppColors;
     /*
       Internal cache for multiple backgrounds
     */
@@ -65,7 +66,16 @@ protected:
                               const QString &activeScheme);
 
 public:
-    bool isBuiltInTheme();
+    // Resolves the directory to write theme changes to for the given theme
+    // name. The resolved theme dir (user or system) is used when writable;
+    // read-only system themes fall back to the user themes directory, creating
+    // it if needed, so customisations never get lost on upgrade.
+    static QString writableThemeDir(const QString &themeName);
+    // Probe whether a directory is truly writable by trying to create and remove
+    // a temporary file. QFileInfo::isWritable() on a directory is unreliable
+    // (notably on Windows where UAC VirtualStore can make a system dir appear
+    // writable).
+    static bool isDirReallyWritable(const QString &dirPath);
     // Explicit color scheme of the theme: theme.cfg's ColorScheme setting
     // (Dark/Light), falling back to the OS color scheme when it is "System".
     bool isDarkMode(const QString &themeDirPath) const;
@@ -87,6 +97,20 @@ public:
     // Load/save per-scheme palette colors
     static PaletteConfig loadPaletteConfig(const QString &themeDirPath, const QString &colorScheme);
     static bool savePaletteConfig(const QString &themeDirPath, const QString &colorScheme, const PaletteConfig &cfg);
+    // Resolve prefix to a scheme-qualified "theme:" path. Existence is probed
+    // internally across the formats themes may ship (.png/.jpg/.svg), so
+    // callers load the returned path directly. Prefers "<prefix>-<dark|light>"
+    // when a file exists at that stem, otherwise the plain "<prefix>" as the
+    // super fallback. The resolved scheme covers explicit light/dark as well
+    // as OS-resolved "system". Returns the path with its file extension when a
+    // match is found; unqualified assets keep working unchanged.
+    QString assetPath(QStringView prefix) const;
+    // Like assetPath, but resolves only the scheme-qualified variant
+    // ("<prefix>-<dark|light>.<ext>") and returns an empty string when no
+    // variant exists — it never falls back to the plain "<prefix>" asset.
+    // Callers that must distinguish "no authored variant" (e.g. to keep a
+    // legacy runtime fallback alive) should use this instead of assetPath.
+    QString schemeVariantPath(QStringView prefix) const;
     // Load the theme's shipped default palette, falling back to the system
     // theme directory when it is absent from the resolved (user) directory.
     static PaletteConfig
@@ -101,12 +125,17 @@ public:
     void reloadCurrentTheme();
     void previewPalette(const PaletteConfig &cfg, const QString &scheme);
 
+    // Resolves an application color role: the theme's stored [AppColors] value
+    // when present, otherwise a palette-accent-derived fallback.
+    QColor appColor(AppColor::Role role) const;
+
     QBrush &getBgBrush(Role zone);
     QBrush getExtraBgBrush(Role zone, int zoneId = 0);
 protected slots:
     void themeChangedSlot();
 signals:
     void themeChanged();
+    void paletteChanged();
 };
 
 extern ThemeManager *themeManager;

cockatrice/src/interface/widgets/deck_analytics/abstract_analytics_panel_widget.cpp

@@ -1,5 +1,6 @@
 #include "abstract_analytics_panel_widget.h"
 
+#include "../../pixel_map_generator.h"
 #include "deck_list_statistics_analyzer.h"
 
 #include <QPushButton>
@@ -20,7 +21,7 @@ AbstractAnalyticsPanelWidget::AbstractAnalyticsPanelWidget(QWidget *parent, Deck
 
     // config button
     configureButton = new QPushButton(this);
-    configureButton->setIcon(QPixmap("theme:icons/cogwheel"));
+    configureButton->setIcon(themePixmap(QStringLiteral("icons/cogwheel")));
     configureButton->setSizePolicy(QSizePolicy::Minimum, QSizePolicy::Minimum);
     connect(configureButton, &QPushButton::clicked, this, &AbstractAnalyticsPanelWidget::applyConfigFromDialog);
     bannerAndSettingsLayout->addWidget(configureButton, 0);

cockatrice/src/interface/widgets/deck_editor/deck_editor_database_display_widget.cpp

@@ -28,7 +28,7 @@ DeckEditorDatabaseDisplayWidget::DeckEditorDatabaseDisplayWidget(QWidget *parent
     searchEdit->setPlaceholderText(tr("Search by card name (or search expressions)"));
     searchEdit->setClearButtonEnabled(true);
     searchEdit->addAction(loadColorAdjustedPixmap("theme:icons/search"), QLineEdit::LeadingPosition);
-    auto help = searchEdit->addAction(QPixmap("theme:icons/info"), QLineEdit::TrailingPosition);
+    auto help = searchEdit->addAction(themePixmap(QStringLiteral("icons/info")), QLineEdit::TrailingPosition);
 
     setFocusProxy(searchEdit);
     setFocusPolicy(Qt::ClickFocus);
@@ -59,13 +59,13 @@ DeckEditorDatabaseDisplayWidget::DeckEditorDatabaseDisplayWidget(QWidget *parent
             &DeckEditorDatabaseDisplayWidget::onRelatedCardClicked);
 
     aAddCard = new QAction(QString(), this);
-    aAddCard->setIcon(QPixmap("theme:icons/arrow_right_green"));
+    aAddCard->setIcon(themePixmap(QStringLiteral("icons/arrow_right_green")));
     connect(aAddCard, &QAction::triggered, this, &DeckEditorDatabaseDisplayWidget::actAddCardToMainDeck);
     auto *tbAddCard = new QToolButton(this);
     tbAddCard->setDefaultAction(aAddCard);
 
     aAddCardToSideboard = new QAction(QString(), this);
-    aAddCardToSideboard->setIcon(QPixmap("theme:icons/arrow_right_blue"));
+    aAddCardToSideboard->setIcon(themePixmap(QStringLiteral("icons/arrow_right_blue")));
     connect(aAddCardToSideboard, &QAction::triggered, this, &DeckEditorDatabaseDisplayWidget::actAddCardToSideboard);
     auto *tbAddCardToSideboard = new QToolButton(this);
     tbAddCardToSideboard->setDefaultAction(aAddCardToSideboard);

cockatrice/src/interface/widgets/deck_editor/deck_editor_deck_dock_widget.cpp

@@ -2,6 +2,7 @@
 
 #include "../../../client/settings/cache_settings.h"
 #include "../../../client/settings/shortcuts_settings.h"
+#include "../../pixel_map_generator.h"
 #include "../playmat/playmat_settings_dialog.h"
 #include "../settings_page/user_interface_settings_page.h"
 #include "../tabs/api/commander_spellbook/commander_bracket_widget.h"
@@ -192,25 +193,25 @@ void DeckEditorDeckDockWidget::createDeckDock()
             &DeckEditorDeckDockWidget::applyActiveGroupCriteria);
 
     aIncrement = new QAction(QString(), this);
-    aIncrement->setIcon(QPixmap("theme:icons/increment"));
+    aIncrement->setIcon(themePixmap(QStringLiteral("icons/increment")));
     connect(aIncrement, &QAction::triggered, this, &DeckEditorDeckDockWidget::actIncrementSelection);
     auto *tbIncrement = new QToolButton(this);
     tbIncrement->setDefaultAction(aIncrement);
 
     aDecrement = new QAction(QString(), this);
-    aDecrement->setIcon(QPixmap("theme:icons/decrement"));
+    aDecrement->setIcon(themePixmap(QStringLiteral("icons/decrement")));
     connect(aDecrement, &QAction::triggered, this, &DeckEditorDeckDockWidget::actDecrementSelection);
     auto *tbDecrement = new QToolButton(this);
     tbDecrement->setDefaultAction(aDecrement);
 
     aRemoveCard = new QAction(QString(), this);
-    aRemoveCard->setIcon(QPixmap("theme:icons/remove_row"));
+    aRemoveCard->setIcon(themePixmap(QStringLiteral("icons/remove_row")));
     connect(aRemoveCard, &QAction::triggered, this, &DeckEditorDeckDockWidget::actRemoveCard);
     auto *tbRemoveCard = new QToolButton(this);
     tbRemoveCard->setDefaultAction(aRemoveCard);
 
     aSwapCard = new QAction(QString(), this);
-    aSwapCard->setIcon(QPixmap("theme:icons/swap"));
+    aSwapCard->setIcon(themePixmap(QStringLiteral("icons/swap")));
     connect(aSwapCard, &QAction::triggered, this, &DeckEditorDeckDockWidget::actSwapSelection);
     auto *tbSwapCard = new QToolButton(this);
     tbSwapCard->setDefaultAction(aSwapCard);

cockatrice/src/interface/widgets/deck_editor/deck_editor_filter_dock_widget.cpp

@@ -4,6 +4,7 @@
 #include "../../../client/settings/shortcuts_settings.h"
 #include "../../../filters/filter_builder.h"
 #include "../../../filters/filter_tree_model.h"
+#include "../../pixel_map_generator.h"
 
 #include <QGridLayout>
 #include <QMenu>
@@ -42,11 +43,11 @@ void DeckEditorFilterDockWidget::createFiltersDock()
     connect(filterBuilder, &FilterBuilder::add, filterModel, &FilterTreeModel::addFilter);
 
     aClearFilterOne = new QAction(QString(), this);
-    aClearFilterOne->setIcon(QPixmap("theme:icons/decrement"));
+    aClearFilterOne->setIcon(themePixmap(QStringLiteral("icons/decrement")));
     connect(aClearFilterOne, &QAction::triggered, this, &DeckEditorFilterDockWidget::actClearFilterOne);
 
     aClearFilterAll = new QAction(QString(), this);
-    aClearFilterAll->setIcon(QPixmap("theme:icons/clearsearch"));
+    aClearFilterAll->setIcon(themePixmap(QStringLiteral("icons/clearsearch")));
     connect(aClearFilterAll, &QAction::triggered, this, &DeckEditorFilterDockWidget::actClearFilterAll);
 
     auto *filterDelOne = new QToolButton();

cockatrice/src/interface/widgets/deck_editor/deck_list_history_manager_widget.cpp

@@ -1,5 +1,6 @@
 #include "deck_list_history_manager_widget.h"
 
+#include "../../pixel_map_generator.h"
 #include "deck_state_manager.h"
 
 DeckListHistoryManagerWidget::DeckListHistoryManagerWidget(DeckStateManager *_deckStateManager,
@@ -10,7 +11,7 @@ DeckListHistoryManagerWidget::DeckListHistoryManagerWidget(DeckStateManager *_de
     layout = new QHBoxLayout(this);
 
     aUndo = new QAction(QString(), this);
-    aUndo->setIcon(QPixmap("theme:icons/arrow_undo"));
+    aUndo->setIcon(themePixmap(QStringLiteral("icons/arrow_undo")));
     aUndo->setShortcut(QKeySequence::Undo);
     aUndo->setShortcutContext(Qt::ApplicationShortcut);
     connect(aUndo, &QAction::triggered, this, &DeckListHistoryManagerWidget::doUndo);
@@ -19,7 +20,7 @@ DeckListHistoryManagerWidget::DeckListHistoryManagerWidget(DeckStateManager *_de
     undoButton->setDefaultAction(aUndo);
 
     aRedo = new QAction(QString(), this);
-    aRedo->setIcon(QPixmap("theme:icons/arrow_redo"));
+    aRedo->setIcon(themePixmap(QStringLiteral("icons/arrow_redo")));
     aRedo->setShortcut(QKeySequence::Redo);
     aRedo->setShortcutContext(Qt::ApplicationShortcut);
     connect(aRedo, &QAction::triggered, this, &DeckListHistoryManagerWidget::doRedo);
@@ -31,7 +32,7 @@ DeckListHistoryManagerWidget::DeckListHistoryManagerWidget(DeckStateManager *_de
     layout->addWidget(redoButton);
 
     historyButton = new SettingsButtonWidget(this);
-    historyButton->setButtonIcon(QPixmap("theme:icons/arrow_history"));
+    historyButton->setButtonIcon(themePixmap(QStringLiteral("icons/arrow_history")));
 
     historyLabel = new QLabel(this);
 

cockatrice/src/interface/widgets/dialogs/dlg_connect.cpp

@@ -1,6 +1,7 @@
 #include "dlg_connect.h"
 
 #include "../../../client/settings/cache_settings.h"
+#include "../../pixel_map_generator.h"
 
 #include <QCheckBox>
 #include <QComboBox>
@@ -21,7 +22,7 @@ DlgConnect::DlgConnect(QWidget *parent) : QDialog(parent)
     previousHosts = new QComboBox(this);
 
     btnDeleteServer = new QPushButton(this);
-    btnDeleteServer->setIcon(QPixmap("theme:icons/remove_row"));
+    btnDeleteServer->setIcon(themePixmap(QStringLiteral("icons/remove_row")));
     btnDeleteServer->setToolTip(tr("Delete the currently selected saved server"));
     btnDeleteServer->setFixedWidth(30);
 
@@ -29,7 +30,7 @@ DlgConnect::DlgConnect(QWidget *parent) : QDialog(parent)
 
     hps = new HandlePublicServers(this);
     btnRefreshServers = new QPushButton(this);
-    btnRefreshServers->setIcon(QPixmap("theme:icons/sync"));
+    btnRefreshServers->setIcon(themePixmap(QStringLiteral("icons/sync")));
     btnRefreshServers->setToolTip(tr("Refresh the server list with known public servers"));
     btnRefreshServers->setFixedWidth(30);
 
@@ -99,7 +100,7 @@ DlgConnect::DlgConnect(QWidget *parent) : QDialog(parent)
     updateDisplayInfo(previousHosts->currentText());
 
     btnForgotPassword = new QPushButton(this);
-    btnForgotPassword->setIcon(QPixmap("theme:icons/forgot_password"));
+    btnForgotPassword->setIcon(themePixmap(QStringLiteral("icons/forgot_password")));
     btnForgotPassword->setToolTip(tr("Reset Password"));
     btnForgotPassword->setFixedWidth(30);
     connect(btnForgotPassword, &QPushButton::released, this, &DlgConnect::actForgotPassword);

cockatrice/src/interface/widgets/dialogs/dlg_edit_tokens.cpp

@@ -1,5 +1,6 @@
 #include "dlg_edit_tokens.h"
 
+#include "../../pixel_map_generator.h"
 #include "../interface/widgets/utility/get_text_with_max.h"
 
 #include <QAction>
@@ -90,10 +91,10 @@ DlgEditTokens::DlgEditTokens(QWidget *parent) : QDialog(parent), currentCard(nul
             &DlgEditTokens::tokenSelectionChanged);
 
     QAction *aAddToken = new QAction(tr("Add token"), this);
-    aAddToken->setIcon(QPixmap("theme:icons/increment"));
+    aAddToken->setIcon(themePixmap(QStringLiteral("icons/increment")));
     connect(aAddToken, &QAction::triggered, this, &DlgEditTokens::actAddToken);
     QAction *aRemoveToken = new QAction(tr("Remove token"), this);
-    aRemoveToken->setIcon(QPixmap("theme:icons/decrement"));
+    aRemoveToken->setIcon(themePixmap(QStringLiteral("icons/decrement")));
     connect(aRemoveToken, &QAction::triggered, this, &DlgEditTokens::actRemoveToken);
 
     auto *databaseToolBar = new QToolBar;

cockatrice/src/interface/widgets/dialogs/dlg_manage_sets.cpp

@@ -1,6 +1,7 @@
 #include "dlg_manage_sets.h"
 
 #include "../../../client/settings/cache_settings.h"
+#include "../../pixel_map_generator.h"
 #include "../interface/card_picture_loader/card_picture_loader.h"
 #include "../interface/widgets/utility/custom_line_edit.h"
 
@@ -35,28 +36,28 @@ WndSets::WndSets(QWidget *parent) : QMainWindow(parent)
     setsEditToolBar->setSizePolicy(QSizePolicy::Minimum, QSizePolicy::Minimum);
 
     aTop = new QAction(QString(), this);
-    aTop->setIcon(QPixmap("theme:icons/arrow_top_green"));
+    aTop->setIcon(themePixmap(QStringLiteral("icons/arrow_top_green")));
     aTop->setToolTip(tr("Move selected set to the top"));
     aTop->setEnabled(false);
     connect(aTop, &QAction::triggered, this, &WndSets::actTop);
     setsEditToolBar->addAction(aTop);
 
     aUp = new QAction(QString(), this);
-    aUp->setIcon(QPixmap("theme:icons/arrow_up_green"));
+    aUp->setIcon(themePixmap(QStringLiteral("icons/arrow_up_green")));
     aUp->setToolTip(tr("Move selected set up"));
     aUp->setEnabled(false);
     connect(aUp, &QAction::triggered, this, &WndSets::actUp);
     setsEditToolBar->addAction(aUp);
 
     aDown = new QAction(QString(), this);
-    aDown->setIcon(QPixmap("theme:icons/arrow_down_green"));
+    aDown->setIcon(themePixmap(QStringLiteral("icons/arrow_down_green")));
     aDown->setToolTip(tr("Move selected set down"));
     aDown->setEnabled(false);
     connect(aDown, &QAction::triggered, this, &WndSets::actDown);
     setsEditToolBar->addAction(aDown);
 
     aBottom = new QAction(QString(), this);
-    aBottom->setIcon(QPixmap("theme:icons/arrow_bottom_green"));
+    aBottom->setIcon(themePixmap(QStringLiteral("icons/arrow_bottom_green")));
     aBottom->setToolTip(tr("Move selected set to the bottom"));
     aBottom->setEnabled(false);
     connect(aBottom, &QAction::triggered, this, &WndSets::actBottom);
@@ -66,7 +67,7 @@ WndSets::WndSets(QWidget *parent) : QMainWindow(parent)
     searchField = new LineEditUnfocusable;
     searchField->setObjectName("searchEdit");
     searchField->setPlaceholderText(tr("Search by set name, code, type, or release date"));
-    searchField->addAction(QPixmap("theme:icons/search"), LineEditUnfocusable::LeadingPosition);
+    searchField->addAction(themePixmap(QStringLiteral("icons/search")), LineEditUnfocusable::LeadingPosition);
     searchField->setClearButtonEnabled(true);
     setFocusProxy(searchField);
 

cockatrice/src/interface/widgets/dialogs/dlg_register.cpp

@@ -1,6 +1,7 @@
 #include "dlg_register.h"
 
 #include "../../../client/settings/cache_settings.h"
+#include "../../pixel_map_generator.h"
 #include "../server/handle_public_servers.h"
 #include "../server/user/user_info_connection.h"
 
@@ -24,7 +25,7 @@ DlgRegister::DlgRegister(QWidget *parent) : QDialog(parent)
     previousHosts = new QComboBox(this);
 
     btnDeleteServer = new QPushButton(this);
-    btnDeleteServer->setIcon(QPixmap("theme:icons/remove_row"));
+    btnDeleteServer->setIcon(themePixmap(QStringLiteral("icons/remove_row")));
     btnDeleteServer->setToolTip(tr("Delete the currently selected saved server"));
     btnDeleteServer->setFixedWidth(30);
 
@@ -32,7 +33,7 @@ DlgRegister::DlgRegister(QWidget *parent) : QDialog(parent)
 
     hps = new HandlePublicServers(this);
     btnRefreshServers = new QPushButton(this);
-    btnRefreshServers->setIcon(QPixmap("theme:icons/sync"));
+    btnRefreshServers->setIcon(themePixmap(QStringLiteral("icons/sync")));
     btnRefreshServers->setToolTip(tr("Refresh the server list with known public servers"));
     btnRefreshServers->setFixedWidth(30);
 

cockatrice/src/interface/widgets/dialogs/dlg_settings.cpp

@@ -6,6 +6,7 @@
 #include "dlg_settings.h"
 
 #include "../../../client/settings/cache_settings.h"
+#include "../../pixel_map_generator.h"
 #include "../main.h"
 #include "../settings_page/appearance_settings_page.h"
 #include "../settings_page/deck_editor_settings_page.h"
@@ -96,7 +97,7 @@ void DlgSettings::setupUi()
     // Search bar
     searchEdit = new QLineEdit;
     searchEdit->setClearButtonEnabled(true);
-    searchEdit->addAction(QPixmap("theme:icons/search"), QLineEdit::LeadingPosition);
+    searchEdit->addAction(themePixmap(QStringLiteral("icons/search")), QLineEdit::LeadingPosition);
     searchEdit->installEventFilter(this);
     connect(searchEdit, &QLineEdit::textChanged, this, &DlgSettings::onSearchTextChanged);
 

cockatrice/src/interface/widgets/general/home_tab_button_color.h

@@ -11,8 +11,8 @@ namespace HomeTabButtonColor
  */
 enum Source
 {
-    Automatic,      ///< Extract color from background, or use theme color if no background
-    FromBackground, ///< Always extract color from background
+    FromThemeColors, ///< Use the theme's identity accent colors
+    FromBackground,  ///< Extract colour from the background image
 };
 
 struct Entry
@@ -23,7 +23,7 @@ struct Entry
 
 inline QList<Entry> all()
 {
-    static QList<Entry> entries = {{Automatic, QT_TR_NOOP("Automatic")},
+    static QList<Entry> entries = {{FromThemeColors, QT_TR_NOOP("From theme colors")},
                                    {FromBackground, QT_TR_NOOP("Extract from background")}};
 
     return entries;
@@ -33,12 +33,12 @@ inline QList<Entry> all()
  * Safely converts an int into the corresponding Source.
  *
  * @param value The int value
- * @return The Source. Returns Source::Automatic if the value is not within range
+ * @return The Source. Returns Source::FromThemeColors if the value is not within range
  */
 inline Source intToSource(int value)
 {
     if (value > FromBackground) {
-        return Automatic; // default
+        return FromThemeColors; // default
     }
 
     return static_cast<Source>(value);

cockatrice/src/interface/widgets/general/home_widget.cpp

@@ -2,6 +2,7 @@
 
 #include "../../../client/settings/cache_settings.h"
 #include "../../../interface/widgets/tabs/tab_supervisor.h"
+#include "../../pixel_map_generator.h"
 #include "../../theme_manager.h"
 #include "../../window_main.h"
 #include "../cards/art_crop_attribution.h"
@@ -20,7 +21,8 @@
 #include <libcockatrice/settings/paths_settings.h>
 
 HomeWidget::HomeWidget(QWidget *parent, TabSupervisor *_tabSupervisor)
-    : QWidget(parent), tabSupervisor(_tabSupervisor), background("theme:backgrounds/home"), overlay("theme:cockatrice")
+    : QWidget(parent), tabSupervisor(_tabSupervisor), background(themePixmap(QStringLiteral("backgrounds/home"))),
+      overlay(themePixmap(QStringLiteral("cockatrice")))
 {
     layout = new QGridLayout(this);
 
@@ -56,6 +58,10 @@ HomeWidget::HomeWidget(QWidget *parent, TabSupervisor *_tabSupervisor)
             &HomeWidget::initializeBackgroundFromSource);
     connect(&SettingsCache::instance(), &SettingsCache::themeChanged, this,
             &HomeWidget::updateButtonsToBackgroundColor);
+    // Scheme flips (light/dark/system with an OS switch) fire on themeManager,
+    // not on SettingsCache::themeChanged, so re-resolve the variant background.
+    connect(themeManager, &ThemeManager::themeChanged, this, &HomeWidget::initializeBackgroundFromSource);
+    connect(themeManager, &ThemeManager::paletteChanged, this, &HomeWidget::updateButtonsToBackgroundColor);
     connect(&SettingsCache::instance().appearance(), &AppearanceSettings::homeTabButtonColorChanged, this,
             &HomeWidget::updateButtonsToBackgroundColor);
 }
@@ -74,7 +80,7 @@ void HomeWidget::initializeBackgroundFromSource()
     switch (backgroundSourceType) {
         case BackgroundSources::Theme:
             cardChangeTimer->stop();
-            background = QPixmap("theme:backgrounds/home");
+            background = themePixmap(QStringLiteral("backgrounds/home"));
             backgroundSourceDeck = DeckList();
             backgroundSourceCard->setCard(ExactCard());
             updateButtonsToBackgroundColor();
@@ -100,32 +106,24 @@ void HomeWidget::loadBackgroundSourceDeck()
     backgroundSourceDeck = deckOpt.has_value() ? deckOpt.value().deckList : DeckList();
 }
 
-static bool isDefaultBackgroundAndTheme()
+static QPair<QColor, QColor> paletteDerivedButtonColors()
 {
-    QString sourceId = SettingsCache::instance().appearance().getHomeTabBackgroundSource();
-    return themeManager->isBuiltInTheme() && BackgroundSources::fromId(sourceId) == BackgroundSources::Theme;
+    return {themeManager->appColor(AppColor::AccentStrong), themeManager->appColor(AppColor::AccentSoft)};
 }
 
 QPair<QColor, QColor> HomeWidget::determineButtonColor() const
 {
-    static QPair defaultColor = {QColor::fromRgb(20, 140, 60), QColor::fromRgb(120, 200, 80)};
-
     auto colorSource =
         HomeTabButtonColor::intToSource(SettingsCache::instance().appearance().getHomeTabButtonColorSourceIndex());
 
     switch (colorSource) {
-        case HomeTabButtonColor::Automatic: {
-            if (isDefaultBackgroundAndTheme()) {
-                return defaultColor;
-            } else {
-                return extractDominantColors(background);
-            }
-        }
+        case HomeTabButtonColor::FromThemeColors:
+            return paletteDerivedButtonColors();
         case HomeTabButtonColor::FromBackground:
             return extractDominantColors(background);
     }
 
-    return defaultColor;
+    return paletteDerivedButtonColors();
 }
 
 void HomeWidget::setRandomCard(ExactCard &newCard)

cockatrice/src/interface/widgets/quick_settings/settings_button_widget.cpp

@@ -1,5 +1,7 @@
 #include "settings_button_widget.h"
 
+#include "../../pixel_map_generator.h"
+
 #include <QApplication>
 #include <QHBoxLayout>
 #include <QMouseEvent>
@@ -8,7 +10,7 @@
 SettingsButtonWidget::SettingsButtonWidget(QWidget *parent)
     : QWidget(parent), button(new QToolButton(this)), popup(new SettingsPopupWidget(nullptr))
 {
-    button->setIcon(QPixmap("theme:icons/cogwheel"));
+    button->setIcon(themePixmap(QStringLiteral("icons/cogwheel")));
     button->setCheckable(true);
     button->setFixedSize(32, 32);
     connect(button, &QToolButton::clicked, this, &SettingsButtonWidget::togglePopup);

cockatrice/src/interface/widgets/replay/replay_widget.cpp

@@ -2,6 +2,7 @@
 
 #include "../../../client/settings/cache_settings.h"
 #include "../../../client/settings/shortcuts_settings.h"
+#include "../../pixel_map_generator.h"
 #include "../interface/widgets/tabs/tab_game.h"
 #include "replay_manager.h"
 #include "replay_quick_settings_widget.h"
@@ -50,15 +51,15 @@ ReplayWidget::ReplayWidget(QWidget *parent, GameReplay *replay)
     replayPlayButton = new QToolButton;
     replayPlayButton->setIconSize(QSize(32, 32));
     QIcon playButtonIcon = QIcon();
-    playButtonIcon.addPixmap(QPixmap("theme:replay/start"), QIcon::Normal, QIcon::Off);
-    playButtonIcon.addPixmap(QPixmap("theme:replay/pause"), QIcon::Normal, QIcon::On);
+    playButtonIcon.addPixmap(themePixmap(QStringLiteral("replay/start")), QIcon::Normal, QIcon::Off);
+    playButtonIcon.addPixmap(themePixmap(QStringLiteral("replay/pause")), QIcon::Normal, QIcon::On);
     replayPlayButton->setIcon(playButtonIcon);
     replayPlayButton->setCheckable(true);
     connect(replayPlayButton, &QToolButton::toggled, this, &ReplayWidget::replayPlayButtonToggled);
 
     replayFastForwardButton = new QToolButton;
     replayFastForwardButton->setIconSize(QSize(32, 32));
-    replayFastForwardButton->setIcon(QPixmap("theme:replay/fastforward"));
+    replayFastForwardButton->setIcon(themePixmap(QStringLiteral("replay/fastforward")));
     replayFastForwardButton->setCheckable(true);
     connect(replayFastForwardButton, &QToolButton::toggled, this, &ReplayWidget::updateTimeScaleFactor);
 

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

@@ -1,5 +1,6 @@
 #include "game_selector.h"
 
+#include "../../pixel_map_generator.h"
 #include "../interface/widgets/dialogs/dlg_create_game.h"
 #include "../interface/widgets/dialogs/dlg_filter_games.h"
 #include "../interface/widgets/tabs/tab_account.h"
@@ -95,10 +96,10 @@ GameSelector::GameSelector(AbstractClient *_client,
     }
 
     filterButton = new QPushButton;
-    filterButton->setIcon(QPixmap("theme:icons/search"));
+    filterButton->setIcon(themePixmap(QStringLiteral("icons/search")));
     connect(filterButton, &QPushButton::clicked, this, &GameSelector::actSetFilter);
     clearFilterButton = new QPushButton;
-    clearFilterButton->setIcon(QPixmap("theme:icons/clearsearch"));
+    clearFilterButton->setIcon(themePixmap(QStringLiteral("icons/clearsearch")));
     bool filtersSetToDefault = showFilters && gameListProxyModel->areFilterParametersSetToDefaults();
     clearFilterButton->setEnabled(!filtersSetToDefault);
     connect(clearFilterButton, &QPushButton::clicked, this, &GameSelector::actClearFilter);

cockatrice/src/interface/widgets/server/remote/remote_replay_list_tree_widget.cpp

@@ -1,5 +1,7 @@
 #include "remote_replay_list_tree_widget.h"
 
+#include "../../../pixel_map_generator.h"
+
 #include <QFileIconProvider>
 #include <QHeaderView>
 #include <QSortFilterProxyModel>
@@ -37,7 +39,7 @@ RemoteReplayList_TreeModel::RemoteReplayList_TreeModel(AbstractClient *_client,
     QFileIconProvider fip;
     dirIcon = fip.icon(QFileIconProvider::Folder);
     fileIcon = fip.icon(QFileIconProvider::File);
-    lockIcon = QPixmap("theme:icons/lock");
+    lockIcon = themePixmap(QStringLiteral("icons/lock"));
 }
 
 RemoteReplayList_TreeModel::~RemoteReplayList_TreeModel()

cockatrice/src/interface/widgets/server/user/user_context_menu.cpp

@@ -51,6 +51,8 @@ UserContextMenu::UserContextMenu(TabSupervisor *_tabSupervisor, QWidget *parent,
     aDemoteFromMod = new QAction(QString(), this);
     aPromoteToJudge = new QAction(QString(), this);
     aDemoteFromJudge = new QAction(QString(), this);
+    aPromoteToDeveloper = new QAction(QString(), this);
+    aDemoteFromDeveloper = new QAction(QString(), this);
     aGetAdminNotes = new QAction(QString(), this);
     aInvestigateUser = new QAction(QString(), this);
 
@@ -76,6 +78,8 @@ void UserContextMenu::retranslateUi()
     aDemoteFromMod->setText(tr("Dem&ote user from moderator"));
     aPromoteToJudge->setText(tr("Promote user to &judge"));
     aDemoteFromJudge->setText(tr("Demote user from judge"));
+    aPromoteToDeveloper->setText(tr("Promote user to &developer"));
+    aDemoteFromDeveloper->setText(tr("Demote user from de&veloper"));
     aGetAdminNotes->setText(tr("View admin notes"));
     aInvestigateUser->setText(tr("Investigate user"));
 }
@@ -268,7 +272,7 @@ void UserContextMenu::adjustMod_processUserResponse(const Response &resp, const
     const Command_AdjustMod &cmd = commandContainer.admin_command(0).GetExtension(Command_AdjustMod::ext);
 
     if (resp.response_code() == Response::RespOk) {
-        if (cmd.should_be_mod() || cmd.should_be_judge()) {
+        if (cmd.should_be_mod() || cmd.should_be_judge() || cmd.should_be_developer()) {
             QMessageBox::information(static_cast<QWidget *>(parent()), tr("Success"),
                                      tr("Successfully promoted user."));
         } else {
@@ -276,7 +280,7 @@ void UserContextMenu::adjustMod_processUserResponse(const Response &resp, const
         }
 
     } else {
-        if (cmd.should_be_mod() || cmd.should_be_judge()) {
+        if (cmd.should_be_mod() || cmd.should_be_judge() || cmd.should_be_developer()) {
             QMessageBox::information(static_cast<QWidget *>(parent()), tr("Failed"), tr("Failed to promote user."));
         } else {
             QMessageBox::information(static_cast<QWidget *>(parent()), tr("Failed"), tr("Failed to demote user."));
@@ -437,6 +441,15 @@ void UserContextMenu::showContextMenu(const QPoint &pos,
                    (tabSupervisor->getUserInfo()->user_level() & ServerInfo_User::IsAdmin)) {
             menu->addAction(aPromoteToJudge);
         }
+
+        if (userLevel.testFlag(ServerInfo_User::IsDeveloper) &&
+            (tabSupervisor->getUserInfo()->user_level() & ServerInfo_User::IsAdmin)) {
+            menu->addAction(aDemoteFromDeveloper);
+
+        } else if (userLevel.testFlag(ServerInfo_User::IsRegistered) &&
+                   (tabSupervisor->getUserInfo()->user_level() & ServerInfo_User::IsAdmin)) {
+            menu->addAction(aPromoteToDeveloper);
+        }
     }
     aDetails->setEnabled(true);
     aChat->setEnabled(anotherUser && online && !userListProxy->isUserIgnored(userName));
@@ -455,6 +468,10 @@ void UserContextMenu::showContextMenu(const QPoint &pos,
     aInvestigateUser->setEnabled(anotherUser);
     aPromoteToMod->setEnabled(anotherUser);
     aDemoteFromMod->setEnabled(anotherUser);
+    aPromoteToJudge->setEnabled(anotherUser);
+    aDemoteFromJudge->setEnabled(anotherUser);
+    aPromoteToDeveloper->setEnabled(anotherUser);
+    aDemoteFromDeveloper->setEnabled(anotherUser);
 
     QAction *actionClicked = menu->exec(pos);
     if (actionClicked == nullptr) {
@@ -489,6 +506,8 @@ void UserContextMenu::showContextMenu(const QPoint &pos,
         execAdjustMod(userName, actionClicked == aPromoteToMod);
     } else if (actionClicked == aPromoteToJudge || actionClicked == aDemoteFromJudge) {
         execAdjustJudge(userName, actionClicked == aPromoteToJudge);
+    } else if (actionClicked == aPromoteToDeveloper || actionClicked == aDemoteFromDeveloper) {
+        execAdjustDeveloper(userName, actionClicked == aPromoteToDeveloper);
     } else if (actionClicked == aBanHistory) {
         execBanHistory(userName);
     } else if (actionClicked == aWarnUser) {
@@ -706,4 +725,14 @@ void UserContextMenu::execAdjustJudge(const QString &userName, bool shouldBeJudg
     PendingCommand *pend = client->prepareAdminCommand(cmd);
     connect(pend, &PendingCommand::finished, this, &UserContextMenu::adjustMod_processUserResponse);
     client->sendCommand(pend);
-}
+}
+
+void UserContextMenu::execAdjustDeveloper(const QString &userName, bool shouldBeDeveloper)
+{
+    Command_AdjustMod cmd;
+    cmd.set_user_name(userName.toStdString());
+    cmd.set_should_be_developer(shouldBeDeveloper);
+    PendingCommand *pend = client->prepareAdminCommand(cmd);
+    connect(pend, &PendingCommand::finished, this, &UserContextMenu::adjustMod_processUserResponse);
+    client->sendCommand(pend);
+}

cockatrice/src/interface/widgets/server/user/user_context_menu.h

@@ -45,6 +45,7 @@ private:
     QAction *aBan, *aBanHistory;
     QAction *aPromoteToMod, *aDemoteFromMod;
     QAction *aPromoteToJudge, *aDemoteFromJudge;
+    QAction *aPromoteToDeveloper, *aDemoteFromDeveloper;
     QAction *aWarnUser, *aWarnHistory;
     QAction *aGetAdminNotes;
     std::function<QList<GameInviteOption>()> gameInviteLinkProvider;
@@ -123,6 +124,7 @@ public:
     void execInvestigateUser(const QString &userName);
     void execAdjustMod(const QString &userName, bool shouldBeMod);
     void execAdjustJudge(const QString &userName, bool shouldBeJudge);
+    void execAdjustDeveloper(const QString &userName, bool shouldBeDeveloper);
 
 private:
     void execInvite(const QString &userName, const GameInviteOption &option);

cockatrice/src/interface/widgets/server/user/user_info_box.cpp

@@ -122,6 +122,8 @@ void UserInfoBox::updateInfo(const ServerInfo_User &user)
     QString userLevelText;
     if (userLevel.testFlag(ServerInfo_User::IsAdmin)) {
         userLevelText = tr("Administrator");
+    } else if (userLevel.testFlag(ServerInfo_User::IsDeveloper)) {
+        userLevelText = tr("Developer");
     } else if (userLevel.testFlag(ServerInfo_User::IsModerator)) {
         userLevelText = tr("Moderator");
     } else if (userLevel.testFlag(ServerInfo_User::IsRegistered)) {

cockatrice/src/interface/widgets/server/user/user_info_popup.cpp

@@ -245,6 +245,9 @@ void UserInfoHeaderWidget::paintEvent(QPaintEvent *)
         if (level.testFlag(ServerInfo_User::IsAdmin)) {
             return QColor(245, 158, 11);
         }
+        if (level.testFlag(ServerInfo_User::IsDeveloper)) {
+            return QColor(185, 28, 28);
+        }
         if (level.testFlag(ServerInfo_User::IsModerator)) {
             return QColor(59, 130, 246);
         }
@@ -300,6 +303,8 @@ void UserInfoHeaderWidget::paintEvent(QPaintEvent *)
     } badge;
     if (level.testFlag(ServerInfo_User::IsAdmin)) {
         badge = {"ADMIN", QColor(245, 158, 11)};
+    } else if (level.testFlag(ServerInfo_User::IsDeveloper)) {
+        badge = {"DEV", QColor(185, 28, 28)};
     } else if (level.testFlag(ServerInfo_User::IsModerator)) {
         badge = {"MOD", QColor(59, 130, 246)};
     } else if (level.testFlag(ServerInfo_User::IsJudge)) {

cockatrice/src/interface/widgets/server/user/user_list_painter.cpp

@@ -49,6 +49,8 @@ QColor UserListPainter::getAccentColor(const UserLevelFlags &userLevel, bool onl
 
     if (userLevel.testFlag(ServerInfo_User::IsAdmin)) {
         accentColor = QColor(245, 158, 11);
+    } else if (userLevel.testFlag(ServerInfo_User::IsDeveloper)) {
+        accentColor = QColor(185, 28, 28);
     } else if (userLevel.testFlag(ServerInfo_User::IsModerator)) {
         accentColor = QColor(59, 130, 246);
     } else if (userLevel.testFlag(ServerInfo_User::IsJudge)) {
@@ -299,6 +301,8 @@ QList<UserListPainter::Badge> UserListPainter::buildBadges(const UserLevelFlags
 
     if (userLevel.testFlag(ServerInfo_User::IsAdmin)) {
         badges << Badge{"ADMIN", QColor(245, 158, 11)};
+    } else if (userLevel.testFlag(ServerInfo_User::IsDeveloper)) {
+        badges << Badge{"DEV", QColor(185, 28, 28)};
     } else if (userLevel.testFlag(ServerInfo_User::IsModerator)) {
         badges << Badge{"MOD", QColor(59, 130, 246)};
     } else if (userLevel.testFlag(ServerInfo_User::IsJudge)) {
@@ -385,9 +389,9 @@ void UserListPainter::paint(QPainter *painter,
     const QString userName = QString::fromStdString(userInfo.name());
     const QString privLevel = QString::fromStdString(userInfo.privlevel());
     const QColor accentColor = getAccentColor(userLevel, online);
-    const bool hasRole = userLevel.testFlag(ServerInfo_User::IsAdmin) ||
-                         userLevel.testFlag(ServerInfo_User::IsModerator) ||
-                         userLevel.testFlag(ServerInfo_User::IsJudge);
+    const bool hasRole =
+        userLevel.testFlag(ServerInfo_User::IsAdmin) || userLevel.testFlag(ServerInfo_User::IsDeveloper) ||
+        userLevel.testFlag(ServerInfo_User::IsModerator) || userLevel.testFlag(ServerInfo_User::IsJudge);
     const QRectF cardRect = QRectF(rect).adjusted(3, 2, -3, -2);
     const int cardRight = getCardRight(option, rect);
 

cockatrice/src/interface/widgets/server/user/user_list_widget.cpp

@@ -234,9 +234,11 @@ bool UserListTWI::operator<(const QTreeWidgetItem &other) const
     const auto &lhsUserLevelFlags = UserLevelFlags(data(0, Qt::UserRole).toInt());
     const auto &rhsUserLevelFlags = UserLevelFlags(other.data(0, Qt::UserRole).toInt());
 
-    // Admins & Mods need no additional comparison checks, just to see if they're an admin or a moderator
+    // Admins, Developers & Mods need no additional comparison checks, just to see if they're an admin, a developer
+    // or a moderator
     static const QList<ServerInfo_User_UserLevelFlag> userLevelWithNoOtherPrefOrder = {
-        ServerInfo_User_UserLevelFlag_IsAdmin, ServerInfo_User_UserLevelFlag_IsModerator};
+        ServerInfo_User_UserLevelFlag_IsAdmin, ServerInfo_User_UserLevelFlag_IsDeveloper,
+        ServerInfo_User_UserLevelFlag_IsModerator};
     for (const auto &userLevelEntry : userLevelWithNoOtherPrefOrder) {
         if (lhsUserLevelFlags.testFlag(userLevelEntry) &&
             lhsUserLevelFlags.testFlag(userLevelEntry) == rhsUserLevelFlags.testFlag(userLevelEntry)) {

cockatrice/src/interface/widgets/settings_page/appearance_settings_page.cpp

@@ -510,7 +510,7 @@ void AppearanceSettingsPage::retranslateUi()
     homeTabDisplayCardNameCheckBox.setText(tr("Display card name of background in bottom right"));
     homeTabButtonColorSourceLabel.setText(tr("Home tab button color:"));
     homeTabButtonColorSourceBox.setToolTip(
-        tr("Automatic: extract from background if present, otherwise use theme default"));
+        tr("Use the theme's identity accent colors, or extract colors from the background image"));
 
     playmatGroupBox->setTitle(tr("Playmat settings"));
     playmatVisibilityLabel.setText(tr("Playmat visibility:"));

cockatrice/src/interface/widgets/settings_page/deck_editor_settings_page.cpp

@@ -1,6 +1,7 @@
 #include "deck_editor_settings_page.h"
 
 #include "../../../client/settings/cache_settings.h"
+#include "../../pixel_map_generator.h"
 #include "update/card_spoiler/spoiler_background_updater.h"
 
 #include <QFileDialog>
@@ -53,15 +54,15 @@ DeckEditorSettingsPage::DeckEditorSettingsPage()
     urlList->addItems(SettingsCache::instance().downloads().getAllURLs());
 
     aAdd = new QAction(this);
-    aAdd->setIcon(QPixmap("theme:icons/increment"));
+    aAdd->setIcon(themePixmap(QStringLiteral("icons/increment")));
     connect(aAdd, &QAction::triggered, this, &DeckEditorSettingsPage::actAddURL);
 
     aEdit = new QAction(this);
-    aEdit->setIcon(QPixmap("theme:icons/pencil"));
+    aEdit->setIcon(themePixmap(QStringLiteral("icons/pencil")));
     connect(aEdit, &QAction::triggered, this, &DeckEditorSettingsPage::actEditURL);
 
     aRemove = new QAction(this);
-    aRemove->setIcon(QPixmap("theme:icons/decrement"));
+    aRemove->setIcon(themePixmap(QStringLiteral("icons/decrement")));
     connect(aRemove, &QAction::triggered, this, &DeckEditorSettingsPage::actRemoveURL);
 
     auto *urlToolBar = new QToolBar;

cockatrice/src/interface/widgets/settings_page/messages_settings_page.cpp

@@ -1,6 +1,7 @@
 #include "messages_settings_page.h"
 
 #include "../../../client/settings/cache_settings.h"
+#include "../../pixel_map_generator.h"
 #include "../interface/widgets/utility/get_text_with_max.h"
 
 #include <QGridLayout>
@@ -107,15 +108,15 @@ MessagesSettingsPage::MessagesSettingsPage()
     }
 
     aAdd = new QAction(this);
-    aAdd->setIcon(QPixmap("theme:icons/increment"));
+    aAdd->setIcon(themePixmap(QStringLiteral("icons/increment")));
     connect(aAdd, &QAction::triggered, this, &MessagesSettingsPage::actAdd);
 
     aEdit = new QAction(this);
-    aEdit->setIcon(QPixmap("theme:icons/pencil"));
+    aEdit->setIcon(themePixmap(QStringLiteral("icons/pencil")));
     connect(aEdit, &QAction::triggered, this, &MessagesSettingsPage::actEdit);
 
     aRemove = new QAction(this);
-    aRemove->setIcon(QPixmap("theme:icons/decrement"));
+    aRemove->setIcon(themePixmap(QStringLiteral("icons/decrement")));
     connect(aRemove, &QAction::triggered, this, &MessagesSettingsPage::actRemove);
 
     auto *messageToolBar = new QToolBar;

cockatrice/src/interface/widgets/settings_page/shortcut_settings_page.cpp

@@ -3,6 +3,7 @@
 #include "../../../client/settings/cache_settings.h"
 #include "../../../client/settings/shortcut_treeview.h"
 #include "../../../client/settings/shortcuts_settings.h"
+#include "../../pixel_map_generator.h"
 #include "../interface/widgets/utility/custom_line_edit.h"
 #include "../interface/widgets/utility/sequence_edit.h"
 
@@ -47,8 +48,8 @@ ShortcutSettingsPage::ShortcutSettingsPage()
     btnResetAll = new QPushButton(this);
     btnClearAll = new QPushButton(this);
 
-    btnResetAll->setIcon(QPixmap("theme:icons/update"));
-    btnClearAll->setIcon(QPixmap("theme:icons/clearsearch"));
+    btnResetAll->setIcon(themePixmap(QStringLiteral("icons/update")));
+    btnClearAll->setIcon(themePixmap(QStringLiteral("icons/clearsearch")));
 
     // layout
     auto *_editLayout = new QGridLayout;

cockatrice/src/interface/widgets/tabs/api/archidekt/tab_archidekt.cpp

@@ -1,6 +1,7 @@
 #include "tab_archidekt.h"
 
 #include "../../../../../client/settings/cache_settings.h"
+#include "../../../../pixel_map_generator.h"
 #include "../../../cards/additional_info/mana_symbol_widget.h"
 #include "../../../utility/completer_utils.h"
 #include "../../tab_supervisor.h"
@@ -213,7 +214,7 @@ void TabArchidekt::setupFilterWidgets()
     // Format filter (collapsible)
     formatButton = new SettingsButtonWidget(secondaryToolbar);
     formatButton->setButtonText(tr("Formats"));
-    formatButton->setButtonIcon(QPixmap("theme:icons/scale_balanced"));
+    formatButton->setButtonIcon(themePixmap(QStringLiteral("icons/scale_balanced")));
 
     QWidget *formatContainer = new QWidget(secondaryToolbar);
     QGridLayout *formatLayout = new QGridLayout(formatContainer);

cockatrice/src/interface/widgets/tabs/api/commander_spellbook/commander_bracket_widget.cpp

@@ -1,6 +1,7 @@
 #include "commander_bracket_widget.h"
 
 #include "../../../../../client/settings/cache_settings.h"
+#include "../../../../pixel_map_generator.h"
 #include "commander_bracket_service.h"
 
 #include <QComboBox>
@@ -30,7 +31,7 @@ CommanderBracketWidget::CommanderBracketWidget(QWidget *parent) : QWidget(parent
     bracketInfoButton->setEnabled(false);
 
     bracketRefreshButton = new QToolButton(this);
-    bracketRefreshButton->setIcon(QPixmap("theme:icons/reload"));
+    bracketRefreshButton->setIcon(themePixmap(QStringLiteral("icons/reload")));
     bracketRefreshButton->setAutoRaise(true);
 
     connect(bracketRefreshButton, &QToolButton::clicked, this, &CommanderBracketWidget::requestBracketEstimate);

cockatrice/src/interface/widgets/tabs/tab_deck_storage.cpp

@@ -2,6 +2,7 @@
 
 #include "../../../client/settings/cache_settings.h"
 #include "../../deck_loader/deck_loader.h"
+#include "../../pixel_map_generator.h"
 #include "../interface/widgets/server/remote/remote_decklist_tree_widget.h"
 #include "../interface/widgets/utility/get_text_with_max.h"
 
@@ -105,19 +106,19 @@ TabDeckStorage::TabDeckStorage(TabSupervisor *_tabSupervisor,
 
     // Left side actions
     aOpenLocalDeck = new QAction(this);
-    aOpenLocalDeck->setIcon(QPixmap("theme:icons/pencil"));
+    aOpenLocalDeck->setIcon(themePixmap(QStringLiteral("icons/pencil")));
     connect(aOpenLocalDeck, &QAction::triggered, this, &TabDeckStorage::actOpenLocalDeck);
     aRenameLocal = new QAction(this);
-    aRenameLocal->setIcon(QPixmap("theme:icons/rename"));
+    aRenameLocal->setIcon(themePixmap(QStringLiteral("icons/rename")));
     connect(aRenameLocal, &QAction::triggered, this, &TabDeckStorage::actRenameLocal);
     aUpload = new QAction(this);
-    aUpload->setIcon(QPixmap("theme:icons/arrow_right_green"));
+    aUpload->setIcon(themePixmap(QStringLiteral("icons/arrow_right_green")));
     connect(aUpload, &QAction::triggered, this, &TabDeckStorage::actUpload);
     aNewLocalFolder = new QAction(this);
     aNewLocalFolder->setIcon(qApp->style()->standardIcon(QStyle::SP_FileDialogNewFolder));
     connect(aNewLocalFolder, &QAction::triggered, this, &TabDeckStorage::actNewLocalFolder);
     aDeleteLocalDeck = new QAction(this);
-    aDeleteLocalDeck->setIcon(QPixmap("theme:icons/remove_row"));
+    aDeleteLocalDeck->setIcon(themePixmap(QStringLiteral("icons/remove_row")));
     connect(aDeleteLocalDeck, &QAction::triggered, this, &TabDeckStorage::actDeleteLocalDeck);
 
     aOpenDecksFolder = new QAction(this);
@@ -126,16 +127,16 @@ TabDeckStorage::TabDeckStorage(TabSupervisor *_tabSupervisor,
 
     // Right side actions
     aOpenRemoteDeck = new QAction(this);
-    aOpenRemoteDeck->setIcon(QPixmap("theme:icons/pencil"));
+    aOpenRemoteDeck->setIcon(themePixmap(QStringLiteral("icons/pencil")));
     connect(aOpenRemoteDeck, &QAction::triggered, this, &TabDeckStorage::actOpenRemoteDeck);
     aDownload = new QAction(this);
-    aDownload->setIcon(QPixmap("theme:icons/arrow_left_green"));
+    aDownload->setIcon(themePixmap(QStringLiteral("icons/arrow_left_green")));
     connect(aDownload, &QAction::triggered, this, &TabDeckStorage::actDownload);
     aNewFolder = new QAction(this);
     aNewFolder->setIcon(qApp->style()->standardIcon(QStyle::SP_FileDialogNewFolder));
     connect(aNewFolder, &QAction::triggered, this, &TabDeckStorage::actNewFolder);
     aDeleteRemoteDeck = new QAction(this);
-    aDeleteRemoteDeck->setIcon(QPixmap("theme:icons/remove_row"));
+    aDeleteRemoteDeck->setIcon(themePixmap(QStringLiteral("icons/remove_row")));
     connect(aDeleteRemoteDeck, &QAction::triggered, this, &TabDeckStorage::actDeleteRemoteDeck);
 
     // Add actions to toolbars

cockatrice/src/interface/widgets/tabs/tab_developer.cpp

@@ -0,0 +1,261 @@
+/**
+ * @file tab_developer.cpp
+ * @ingroup ServerTabs
+ */
+//! \todo Document this file.
+
+#include "tab_developer.h"
+
+#include <QCheckBox>
+#include <QDateTime>
+#include <QHBoxLayout>
+#include <QHeaderView>
+#include <QLabel>
+#include <QPushButton>
+#include <QSpinBox>
+#include <QTableWidget>
+#include <QTimer>
+#include <QVBoxLayout>
+#include <algorithm>
+#include <libcockatrice/network/client/abstract/abstract_client.h>
+#include <libcockatrice/protocol/pb/command_get_server_stats.pb.h>
+#include <libcockatrice/protocol/pb/response_get_server_stats.pb.h>
+#include <libcockatrice/protocol/pending_command.h>
+
+static constexpr int DEFAULT_AUTO_REFRESH_INTERVAL_SECS = 30;
+
+TabDeveloper::TabDeveloper(TabSupervisor *_tabSupervisor, AbstractClient *_client)
+    : Tab(_tabSupervisor), client(_client)
+{
+    statsTable = new QTableWidget(0, 2);
+    statsTable->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Preferred);
+    statsTable->setEditTriggers(QAbstractItemView::NoEditTriggers);
+    statsTable->setSelectionBehavior(QAbstractItemView::SelectRows);
+    statsTable->setSelectionMode(QAbstractItemView::SingleSelection);
+    statsTable->verticalHeader()->setVisible(false);
+    statsTable->horizontalHeader()->setSectionResizeMode(0, QHeaderView::Interactive);
+    statsTable->horizontalHeader()->setSectionResizeMode(1, QHeaderView::Interactive);
+    statsTable->horizontalHeader()->setStretchLastSection(true);
+
+    commandTable = new QTableWidget(0, 4);
+    commandTable->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
+    commandTable->setEditTriggers(QAbstractItemView::NoEditTriggers);
+    commandTable->setSelectionBehavior(QAbstractItemView::SelectRows);
+    commandTable->setSelectionMode(QAbstractItemView::SingleSelection);
+    commandTable->verticalHeader()->setVisible(false);
+    commandTable->horizontalHeader()->setSectionResizeMode(0, QHeaderView::Interactive);
+    commandTable->horizontalHeader()->setSectionResizeMode(1, QHeaderView::Interactive);
+    commandTable->horizontalHeader()->setSectionResizeMode(2, QHeaderView::Interactive);
+    commandTable->horizontalHeader()->setSectionResizeMode(3, QHeaderView::Interactive);
+
+    statusLabel = new QLabel;
+
+    autoRefreshCheckBox = new QCheckBox;
+    autoRefreshCheckBox->setChecked(false);
+
+    refreshIntervalSpinBox = new QSpinBox;
+    refreshIntervalSpinBox->setRange(5, 3600);
+    refreshIntervalSpinBox->setValue(DEFAULT_AUTO_REFRESH_INTERVAL_SECS);
+    refreshIntervalSpinBox->setEnabled(false);
+
+    autoRefreshTimer = new QTimer(this);
+    connect(autoRefreshTimer, &QTimer::timeout, this, &TabDeveloper::refreshClicked);
+    connect(autoRefreshCheckBox, &QCheckBox::toggled, this, &TabDeveloper::autoRefreshToggled);
+    connect(refreshIntervalSpinBox, QOverload<int>::of(&QSpinBox::valueChanged), this,
+            &TabDeveloper::refreshIntervalChanged);
+
+    refreshButton = new QPushButton;
+    refreshButton->setAutoDefault(true);
+    connect(refreshButton, &QPushButton::clicked, this, &TabDeveloper::refreshClicked);
+
+    auto *buttonLayout = new QHBoxLayout;
+    buttonLayout->addWidget(statusLabel, 1, Qt::AlignLeft);
+    buttonLayout->addWidget(autoRefreshCheckBox, 0, Qt::AlignRight);
+    buttonLayout->addWidget(refreshIntervalSpinBox, 0, Qt::AlignRight);
+    buttonLayout->addWidget(refreshButton, 0, Qt::AlignRight);
+
+    auto *tableLayout = new QHBoxLayout;
+    tableLayout->addWidget(statsTable, 1);
+    tableLayout->addWidget(commandTable, 2);
+
+    auto *mainLayout = new QVBoxLayout;
+    mainLayout->addLayout(tableLayout, 1);
+    mainLayout->addLayout(buttonLayout);
+
+    auto *central = new QWidget;
+    central->setLayout(mainLayout);
+    setCentralWidget(central);
+
+    retranslateUi();
+}
+
+void TabDeveloper::retranslateUi()
+{
+    autoRefreshCheckBox->setText(tr("Auto-refresh"));
+    autoRefreshCheckBox->setToolTip(tr("Automatically request fresh server statistics at a fixed interval."));
+    refreshIntervalSpinBox->setSuffix(tr(" s"));
+    refreshIntervalSpinBox->setToolTip(tr("Seconds between automatic refreshes."));
+    refreshButton->setText(tr("Refresh server stats"));
+    statsTable->setHorizontalHeaderLabels(QString(tr("Statistic;Value")).split(";"));
+    commandTable->setHorizontalHeaderLabels(QString(tr("Command;Count;Total ms;Avg ms")).split(";"));
+    if (statsTable->rowCount() == 0) {
+        statusLabel->clear();
+    }
+}
+
+QString TabDeveloper::formatBytes(quint64 bytes)
+{
+    const quint64 kib = 1024;
+    const quint64 mib = 1024 * kib;
+    const quint64 gib = 1024 * mib;
+    if (bytes >= gib) {
+        return tr("%1 GiB").arg(QString::number(bytes / static_cast<double>(gib), 'f', 2));
+    }
+    if (bytes >= mib) {
+        return tr("%1 MiB").arg(QString::number(bytes / static_cast<double>(mib), 'f', 2));
+    }
+    if (bytes >= kib) {
+        return tr("%1 KiB").arg(QString::number(bytes / static_cast<double>(kib), 'f', 2));
+    }
+    return tr("%1 bytes").arg(bytes);
+}
+
+QString TabDeveloper::formatDurationMs(qint64 ms)
+{
+    if (ms >= 1000) {
+        return tr("%1 s").arg(QString::number(ms / 1000.0, 'f', 2));
+    }
+    return tr("%1 ms").arg(ms);
+}
+
+void TabDeveloper::appendStatRow(const QString &name, const QString &value)
+{
+    const int row = statsTable->rowCount();
+    statsTable->insertRow(row);
+    statsTable->setItem(row, 0, new QTableWidgetItem(name));
+    statsTable->setItem(row, 1, new QTableWidgetItem(value));
+}
+
+void TabDeveloper::appendSeparatorRow(const QString &sectionTitle)
+{
+    const int row = statsTable->rowCount();
+    statsTable->insertRow(row);
+    auto *labelItem = new QTableWidgetItem(sectionTitle);
+    auto font = labelItem->font();
+    font.setBold(true);
+    labelItem->setFont(font);
+    labelItem->setFlags(labelItem->flags() & ~Qt::ItemIsSelectable);
+    statsTable->setItem(row, 0, labelItem);
+    statsTable->setItem(row, 1, new QTableWidgetItem(QString()));
+}
+
+void TabDeveloper::refreshClicked()
+{
+    if (requestPending) {
+        return;
+    }
+    requestPending = true;
+    Command_GetServerStats cmd;
+    PendingCommand *pend = client->prepareDeveloperCommand(cmd);
+    connect(pend, &PendingCommand::finished, this, &TabDeveloper::serverStatsResponse);
+    client->sendCommand(pend);
+}
+
+void TabDeveloper::autoRefreshToggled(bool checked)
+{
+    refreshIntervalSpinBox->setEnabled(checked);
+    if (checked) {
+        refreshIntervalChanged();
+        refreshClicked();
+    } else {
+        autoRefreshTimer->stop();
+    }
+}
+
+void TabDeveloper::refreshIntervalChanged()
+{
+    if (autoRefreshCheckBox->isChecked()) {
+        autoRefreshTimer->start(refreshIntervalSpinBox->value() * 1000);
+    }
+}
+
+void TabDeveloper::serverStatsResponse(const Response &resp)
+{
+    requestPending = false;
+    if (resp.response_code() != Response::RespOk) {
+        statusLabel->setText(tr("No server statistics available yet."));
+        return;
+    }
+
+    const Response_GetServerStats &response = resp.GetExtension(Response_GetServerStats::ext);
+
+    statsTable->setRowCount(0);
+
+    // Overview section
+    appendStatRow(tr("Registered users online"), QString::number(response.users_count()));
+    appendStatRow(tr("Moderators online"), QString::number(response.mods_count()));
+    appendStatRow(tr("Games running"), QString::number(response.games_count()));
+    appendStatRow(tr("Traffic sent (last tick)"), formatBytes(response.tx_bytes()));
+    appendStatRow(tr("Traffic received (last tick)"), formatBytes(response.rx_bytes()));
+
+    const qint64 uptime = static_cast<qint64>(response.uptime_secs());
+    const int days = static_cast<int>(uptime / 86400);
+    const int hours = static_cast<int>((uptime % 86400) / 3600);
+    const int minutes = static_cast<int>((uptime % 3600) / 60);
+    appendStatRow(tr("Server uptime"), days > 0 ? tr("%1d %2h %3m").arg(days).arg(hours).arg(minutes)
+                                                : tr("%1h %2m").arg(hours).arg(minutes));
+
+    const QDateTime snapshotTime = QDateTime::fromSecsSinceEpoch(static_cast<qint64>(response.timest()));
+    appendStatRow(tr("Snapshot taken"), snapshotTime.toLocalTime().toString("yyyy-MM-dd HH:mm"));
+
+    // Live metrics section
+    appendSeparatorRow(tr("Live Metrics"));
+    appendStatRow(tr("Cards in live games"), QString::number(response.cards_in_games()));
+    appendStatRow(tr("Total commands processed"), QString::number(response.total_commands()));
+
+    if (response.total_commands() > 0) {
+        const double avgMs = static_cast<double>(response.total_command_time_ms()) / response.total_commands();
+        appendStatRow(tr("Avg command time"), QString::number(avgMs, 'f', 2) + " ms");
+    }
+    appendStatRow(tr("Active command types"), QString::number(response.active_command_types()));
+
+    appendStatRow(tr("Event loop stalls"), QString::number(response.eventloop_stalls_total()));
+    appendStatRow(tr("Last stall overshoot"), formatDurationMs(response.eventloop_last_stall_ms()));
+    appendStatRow(tr("Worst stall overshoot"), formatDurationMs(response.eventloop_max_stall_ms()));
+
+    if (response.game_start_count() > 0) {
+        appendStatRow(tr("Game starts"), QString::number(response.game_start_count()));
+        const double avgStartMs = static_cast<double>(response.game_start_total_ms()) / response.game_start_count();
+        appendStatRow(tr("Avg game start time"), QString::number(avgStartMs, 'f', 1) + " ms");
+    }
+
+    // Per-command breakdown table
+    QList<CommandStats> sortedStats(response.command_stats().begin(), response.command_stats().end());
+    std::sort(sortedStats.begin(), sortedStats.end(),
+              [](const auto &a, const auto &b) { return a.total_ms() > b.total_ms(); });
+
+    commandTable->setRowCount(0);
+    for (const auto &cs : sortedStats) {
+        const int row = commandTable->rowCount();
+        commandTable->insertRow(row);
+        commandTable->setItem(row, 0, new QTableWidgetItem(QString::fromStdString(cs.command_name())));
+
+        auto *countItem = new QTableWidgetItem(QString::number(cs.count()));
+        countItem->setTextAlignment(Qt::AlignRight | Qt::AlignVCenter);
+        commandTable->setItem(row, 1, countItem);
+
+        auto *totalItem = new QTableWidgetItem(QString::number(cs.total_ms()));
+        totalItem->setTextAlignment(Qt::AlignRight | Qt::AlignVCenter);
+        commandTable->setItem(row, 2, totalItem);
+
+        const double avg = cs.count() > 0 ? static_cast<double>(cs.total_ms()) / cs.count() : 0.0;
+        auto *avgItem = new QTableWidgetItem(QString::number(avg, 'f', 2));
+        avgItem->setTextAlignment(Qt::AlignRight | Qt::AlignVCenter);
+        commandTable->setItem(row, 3, avgItem);
+    }
+    commandTable->resizeColumnsToContents();
+    statsTable->resizeColumnsToContents();
+    commandTable->resizeColumnsToContents();
+
+    statusLabel->setText(tr("Updated %1").arg(QDateTime::currentDateTime().toString("yyyy-MM-dd HH:mm")));
+}

cockatrice/src/interface/widgets/tabs/tab_developer.h

@@ -0,0 +1,55 @@
+/**
+ * @file tab_developer.h
+ * @ingroup ServerTabs
+ */
+//! \todo Document this file.
+
+#ifndef TAB_DEVELOPER_H
+#define TAB_DEVELOPER_H
+
+#include "tab.h"
+
+class AbstractClient;
+class QCheckBox;
+class QLabel;
+class QPushButton;
+class QSpinBox;
+class QTableWidget;
+class QTimer;
+class Response;
+
+class TabDeveloper : public Tab
+{
+    Q_OBJECT
+private:
+    AbstractClient *client;
+    QTableWidget *statsTable;
+    QTableWidget *commandTable;
+    QPushButton *refreshButton;
+    QLabel *statusLabel;
+    QCheckBox *autoRefreshCheckBox;
+    QSpinBox *refreshIntervalSpinBox;
+    QTimer *autoRefreshTimer;
+    bool requestPending = false;
+
+    void appendStatRow(const QString &name, const QString &value);
+    void appendSeparatorRow(const QString &sectionTitle);
+    static QString formatBytes(quint64 bytes);
+    static QString formatDurationMs(qint64 ms);
+
+private slots:
+    void refreshClicked();
+    void serverStatsResponse(const Response &resp);
+    void autoRefreshToggled(bool checked);
+    void refreshIntervalChanged();
+
+public:
+    explicit TabDeveloper(TabSupervisor *_tabSupervisor, AbstractClient *_client);
+    void retranslateUi() override;
+    [[nodiscard]] QString getTabText() const override
+    {
+        return tr("Developer");
+    }
+};
+
+#endif

cockatrice/src/interface/widgets/tabs/tab_logs.cpp

@@ -19,7 +19,8 @@
 #include <libcockatrice/protocol/pending_command.h>
 #include <libcockatrice/utility/string_limits.h>
 
-TabLog::TabLog(TabSupervisor *_tabSupervisor, AbstractClient *_client) : Tab(_tabSupervisor), client(_client)
+TabLog::TabLog(TabSupervisor *_tabSupervisor, AbstractClient *_client, bool _canUseDeveloperCommands)
+    : Tab(_tabSupervisor), client(_client), canUseDeveloperCommands(_canUseDeveloperCommands)
 {
     roomTable = new QTableWidget();
     roomTable->setColumnCount(6);
@@ -80,7 +81,9 @@ void TabLog::getClicked()
     if (!mainRoom->isChecked() && !gameRoom->isChecked() && !privateChat->isChecked()) {
         mainRoom->setChecked(true);
         gameRoom->setChecked(true);
-        privateChat->setChecked(true);
+        if (!canUseDeveloperCommands) {
+            privateChat->setChecked(true);
+        }
     }
 
     if (maximumResults->value() == 0) {
@@ -117,7 +120,15 @@ void TabLog::getClicked()
     };
     cmd.set_date_range(dateRange);
     cmd.set_maximum_results(maximumResults->value());
-    PendingCommand *pend = client->prepareModeratorCommand(cmd);
+
+    PendingCommand *pend;
+    if (canUseDeveloperCommands) {
+        // Developers query logs through the developer command family.
+        pend = client->prepareDeveloperCommand(cmd);
+    } else {
+        pend = client->prepareModeratorCommand(cmd);
+    }
+
     connect(pend, &PendingCommand::finished, this, &TabLog::viewLogHistory_processResponse);
     client->sendCommand(pend);
 }
@@ -171,6 +182,14 @@ void TabLog::createDock()
     mainRoom = new QCheckBox(tr("Main Room"));
     gameRoom = new QCheckBox(tr("Game Room"));
     privateChat = new QCheckBox(tr("Private Chat"));
+    if (canUseDeveloperCommands) {
+        // Developers cannot query private conversations.
+        privateChat->setVisible(false);
+        // The developer family ignores the IP filter server-side, so showing
+        // the field would silently unfilter the result by it. Hide it.
+        labelFindIPAddress->setVisible(false);
+        findIPAddress->setVisible(false);
+    }
 
     pastDays = new QRadioButton(tr("Past X Days: "));
     today = new QRadioButton(tr("Today"));

cockatrice/src/interface/widgets/tabs/tab_logs.h

@@ -33,6 +33,7 @@ class TabLog : public Tab
     Q_OBJECT
 private:
     AbstractClient *client;
+    bool canUseDeveloperCommands;
     QLabel *labelFindUserName, *labelFindIPAddress, *labelFindGameName, *labelFindGameID, *labelMessage, *labelMaximum,
         *labelDescription;
     LineEditUnfocusable *findUsername, *findIPAddress, *findGameName, *findGameID, *findMessage;
@@ -58,7 +59,7 @@ private slots:
     void restartLayout();
 
 public:
-    TabLog(TabSupervisor *_tabSupervisor, AbstractClient *_client);
+    TabLog(TabSupervisor *_tabSupervisor, AbstractClient *_client, bool _canUseDeveloperCommands = false);
     ~TabLog() override;
     void retranslateUi() override;
     [[nodiscard]] QString getTabText() const override

cockatrice/src/interface/widgets/tabs/tab_moderation.cpp

@@ -381,6 +381,9 @@ void TabModeration::moderatorLoginsResponse(const Response &response)
         if (login.user_level() & ServerInfo_User::IsAdmin) {
             levels << tr("Admin");
         }
+        if (login.user_level() & ServerInfo_User::IsDeveloper) {
+            levels << tr("Developer");
+        }
         if (login.user_level() & ServerInfo_User::IsModerator) {
             levels << tr("Moderator");
         }

cockatrice/src/interface/widgets/tabs/tab_replays.cpp

@@ -1,6 +1,7 @@
 #include "tab_replays.h"
 
 #include "../../../client/settings/cache_settings.h"
+#include "../../pixel_map_generator.h"
 #include "../interface/widgets/server/remote/remote_replay_list_tree_widget.h"
 #include "tab_game.h"
 
@@ -102,17 +103,17 @@ QGroupBox *TabReplays::createLeftLayout()
 
     // Left side actions
     aOpenLocalReplay = new QAction(this);
-    aOpenLocalReplay->setIcon(QPixmap("theme:icons/view"));
+    aOpenLocalReplay->setIcon(themePixmap(QStringLiteral("icons/view")));
     connect(aOpenLocalReplay, &QAction::triggered, this, &TabReplays::actOpenLocalReplay);
     connect(localDirView, &QTreeView::doubleClicked, this, &TabReplays::actOpenLocalReplay);
     aRenameLocal = new QAction(this);
-    aRenameLocal->setIcon(QPixmap("theme:icons/rename"));
+    aRenameLocal->setIcon(themePixmap(QStringLiteral("icons/rename")));
     connect(aRenameLocal, &QAction::triggered, this, &TabReplays::actRenameLocal);
     aNewLocalFolder = new QAction(this);
     aNewLocalFolder->setIcon(qApp->style()->standardIcon(QStyle::SP_FileDialogNewFolder));
     connect(aNewLocalFolder, &QAction::triggered, this, &TabReplays::actNewLocalFolder);
     aDeleteLocalReplay = new QAction(this);
-    aDeleteLocalReplay->setIcon(QPixmap("theme:icons/remove_row"));
+    aDeleteLocalReplay->setIcon(themePixmap(QStringLiteral("icons/remove_row")));
     connect(aDeleteLocalReplay, &QAction::triggered, this, &TabReplays::actDeleteLocalReplay);
 
     aOpenReplaysFolder = new QAction(this);
@@ -164,24 +165,24 @@ QGroupBox *TabReplays::createRightLayout()
 
     // Right side actions
     aOpenRemoteReplay = new QAction(this);
-    aOpenRemoteReplay->setIcon(QPixmap("theme:icons/view"));
+    aOpenRemoteReplay->setIcon(themePixmap(QStringLiteral("icons/view")));
     connect(aOpenRemoteReplay, &QAction::triggered, this, &TabReplays::actOpenRemoteReplay);
     connect(serverDirView, &QTreeView::doubleClicked, this, &TabReplays::actOpenRemoteReplay);
     aDownload = new QAction(this);
-    aDownload->setIcon(QPixmap("theme:icons/arrow_left_green"));
+    aDownload->setIcon(themePixmap(QStringLiteral("icons/arrow_left_green")));
     connect(aDownload, &QAction::triggered, this, &TabReplays::actDownload);
     aKeep = new QAction(this);
-    aKeep->setIcon(QPixmap("theme:icons/lock"));
+    aKeep->setIcon(themePixmap(QStringLiteral("icons/lock")));
     connect(aKeep, &QAction::triggered, this, &TabReplays::actKeepRemoteReplay);
     aDeleteRemoteReplay = new QAction(this);
-    aDeleteRemoteReplay->setIcon(QPixmap("theme:icons/remove_row"));
+    aDeleteRemoteReplay->setIcon(themePixmap(QStringLiteral("icons/remove_row")));
     connect(aDeleteRemoteReplay, &QAction::triggered, this, &TabReplays::actDeleteRemoteReplay);
     aGetReplayCode = new QAction(this);
-    aGetReplayCode->setIcon(QPixmap("theme:icons/share"));
+    aGetReplayCode->setIcon(themePixmap(QStringLiteral("icons/share")));
     connect(aGetReplayCode, &QAction::triggered, this, &TabReplays::actGetReplayCode);
 
     aSubmitReplayCode = new QAction(this);
-    aSubmitReplayCode->setIcon(QPixmap("theme:icons/search"));
+    aSubmitReplayCode->setIcon(themePixmap(QStringLiteral("icons/search")));
     connect(aSubmitReplayCode, &QAction::triggered, this, &TabReplays::actSubmitReplayCode);
 
     // Add actions to toolbars

cockatrice/src/interface/widgets/tabs/tab_room.cpp

@@ -2,6 +2,7 @@
 
 #include "../../../client/settings/cache_settings.h"
 #include "../../../client/settings/shortcuts_settings.h"
+#include "../../pixel_map_generator.h"
 #include "../interface/widgets/dialogs/dlg_settings.h"
 #include "../interface/widgets/server/chat_view/chat_view.h"
 #include "../interface/widgets/server/game_link.h"
@@ -98,7 +99,7 @@ TabRoom::TabRoom(TabSupervisor *_tabSupervisor,
     connect(aOpenChatSettings, &QAction::triggered, this, &TabRoom::actOpenChatSettings);
 
     auto *chatSettingsButton = new QToolButton;
-    chatSettingsButton->setIcon(QPixmap("theme:icons/settings"));
+    chatSettingsButton->setIcon(themePixmap(QStringLiteral("icons/settings")));
     chatSettingsButton->setMenu(chatSettingsMenu);
     chatSettingsButton->setPopupMode(QToolButton::InstantPopup);
 

cockatrice/src/interface/widgets/tabs/tab_supervisor.cpp

@@ -15,6 +15,7 @@
 #include "tab_card_art_rules.h"
 #include "tab_deck_editor.h"
 #include "tab_deck_storage.h"
+#include "tab_developer.h"
 #include "tab_game.h"
 #include "tab_home.h"
 #include "tab_logs.h"
@@ -119,7 +120,7 @@ TabSupervisor::TabSupervisor(AbstractClient *_client, QMenu *tabsMenu, QWidget *
     : QTabWidget(parent), userInfo(nullptr), client(_client), tabsMenu(tabsMenu), tabHome(nullptr),
       tabVisualDeckStorage(nullptr), tabServer(nullptr), tabAccount(nullptr), tabDeckStorage(nullptr),
       tabReplays(nullptr), tabAdmin(nullptr), tabCardArtRules(nullptr), tabLog(nullptr), tabReport(nullptr),
-      tabModeration(nullptr), isLocalGame(false)
+      tabModeration(nullptr), tabDeveloper(nullptr), isLocalGame(false)
 {
     setElideMode(Qt::ElideRight);
     setMovable(true);
@@ -205,6 +206,10 @@ TabSupervisor::TabSupervisor(AbstractClient *_client, QMenu *tabsMenu, QWidget *
     aTabModeration->setCheckable(true);
     connect(aTabModeration, &QAction::triggered, this, &TabSupervisor::actTabModeration);
 
+    aTabDeveloper = new QAction(this);
+    aTabDeveloper->setCheckable(true);
+    connect(aTabDeveloper, &QAction::triggered, this, &TabSupervisor::actTabDeveloper);
+
     connect(&SettingsCache::instance().shortcuts(), &ShortcutsSettings::shortCutChanged, this,
             &TabSupervisor::refreshShortcuts);
     refreshShortcuts();
@@ -247,6 +252,7 @@ void TabSupervisor::retranslateUi()
     aTabReport->setText(tr("Report Queue"));
     aTabModeration->setText(tr("Moderation"));
     aTabCardArtRules->setText(tr("Card Art Rules"));
+    aTabDeveloper->setText(tr("Developer"));
 
     // tabs
     QList<Tab *> tabs;
@@ -259,6 +265,7 @@ void TabSupervisor::retranslateUi()
     tabs.append(tabReport);
     tabs.append(tabModeration);
     tabs.append(tabCardArtRules);
+    tabs.append(tabDeveloper);
     QMapIterator<int, TabRoom *> roomIterator(roomTabs);
     while (roomIterator.hasNext()) {
         tabs.append(roomIterator.next().value());
@@ -528,6 +535,19 @@ void TabSupervisor::start(const ServerInfo_User &_userInfo)
         }
     }
 
+    if (userInfo->user_level() & ServerInfo_User::IsDeveloper) {
+        tabsMenu->addSeparator();
+        tabsMenu->addAction(aTabDeveloper);
+        // Developers without moderation rights get log access through their
+        // own role. Moderators already have the Logs entry from above.
+        if (!(userInfo->user_level() & ServerInfo_User::IsModerator)) {
+            tabsMenu->addAction(aTabLog);
+            if (SettingsCache::instance().tabs().getTabLogOpen()) {
+                openTabLog();
+            }
+        }
+    }
+
     retranslateUi();
 }
 
@@ -540,6 +560,7 @@ void TabSupervisor::startLocal(const QList<AbstractClient *> &_clients)
     tabLog = nullptr;
     tabReport = nullptr;
     tabModeration = nullptr;
+    tabDeveloper = nullptr;
     isLocalGame = true;
     userInfo = new ServerInfo_User;
     localClients = _clients;
@@ -590,6 +611,9 @@ void TabSupervisor::stop()
         if (tabCardArtRules) {
             tabCardArtRules->close();
         }
+        if (tabDeveloper) {
+            tabDeveloper->close();
+        }
     }
 
     QList<Tab *> tabsToDelete;
@@ -819,7 +843,13 @@ void TabSupervisor::actTabLog(bool checked)
 
 void TabSupervisor::openTabLog()
 {
-    tabLog = new TabLog(this, client);
+    // Developers query logs through the developer command family, so tell the
+    // tab which family to use. The moderator family is strictly stronger, so a
+    // moderator who also holds the developer bit keeps the moderator path — the
+    // developer bit only selects the (narrowed) developer family on its own.
+    const bool useDeveloperCommands = (userInfo->user_level() & ServerInfo_User::IsDeveloper) &&
+                                      !(userInfo->user_level() & ServerInfo_User::IsModerator);
+    tabLog = new TabLog(this, client, useDeveloperCommands);
     myAddTab(tabLog, aTabLog);
     connect(tabLog, &QObject::destroyed, this, [this] {
         tabLog = nullptr;
@@ -881,6 +911,27 @@ void TabSupervisor::openTabModeration(const QString &userName)
     aTabModeration->setChecked(true);
 }
 
+void TabSupervisor::actTabDeveloper(bool checked)
+{
+    if (checked && !tabDeveloper) {
+        openTabDeveloper();
+        setCurrentWidget(tabDeveloper);
+    } else if (!checked && tabDeveloper) {
+        tabDeveloper->closeRequest();
+    }
+}
+
+void TabSupervisor::openTabDeveloper()
+{
+    tabDeveloper = new TabDeveloper(this, client);
+    myAddTab(tabDeveloper, aTabDeveloper);
+    connect(tabDeveloper, &QObject::destroyed, this, [this] {
+        tabDeveloper = nullptr;
+        aTabDeveloper->setChecked(false);
+    });
+    aTabDeveloper->setChecked(true);
+}
+
 void TabSupervisor::updatePingTime(int value, int max)
 {
     if (!tabServer) {
@@ -1249,7 +1300,7 @@ void TabSupervisor::tabUserEvent(bool globalEvent)
     auto *tab = static_cast<Tab *>(sender());
     if (tab != currentWidget()) {
         tab->setContentsChanged(true);
-        setTabIcon(indexOf(tab), QPixmap("theme:icons/tab_changed"));
+        setTabIcon(indexOf(tab), themePixmap(QStringLiteral("icons/tab_changed")));
     }
     if (globalEvent && SettingsCache::instance().userInterface().getNotificationsEnabled()) {
         QApplication::alert(this);

cockatrice/src/interface/widgets/tabs/tab_supervisor.h

@@ -45,6 +45,7 @@ class TabReport;
 class TabModeration;
 class TabAccount;
 class TabDeckEditor;
+class TabDeveloper;
 class TabLog;
 class RoomEvent;
 class GameEventContainer;
@@ -108,6 +109,7 @@ private:
     TabLog *tabLog;
     TabReport *tabReport;
     TabModeration *tabModeration;
+    TabDeveloper *tabDeveloper;
     QMap<int, TabRoom *> roomTabs;
     QMap<int, TabGame *> gameTabs;
     QList<TabGame *> replayTabs;
@@ -117,7 +119,7 @@ private:
 
     QAction *aTabHome, *aTabDeckEditor, *aTabVisualDeckEditor, *aTabEdhRec, *aTabArchidekt, *aTabVisualDeckStorage,
         *aTabVisualDatabaseDisplay, *aTabServer, *aTabAccount, *aTabDeckStorage, *aTabReplays, *aTabAdmin,
-        *aTabCardArtRules, *aTabLog, *aTabReport, *aTabModeration;
+        *aTabCardArtRules, *aTabLog, *aTabReport, *aTabModeration, *aTabDeveloper;
 
     int myAddTab(Tab *tab, QAction *manager = nullptr);
     void addCloseButtonToTab(Tab *tab, int tabIndex, QAction *manager);
@@ -207,6 +209,7 @@ private slots:
     void actTabLog(bool checked);
     void actTabReport(bool checked);
     void actTabModeration(bool checked);
+    void actTabDeveloper(bool checked);
 
     void openTabVisualDeckStorage();
     void openTabHome();
@@ -218,6 +221,7 @@ private slots:
     void openTabCardArtRules();
     void openTabLog();
     void openTabReport();
+    void openTabDeveloper();
 
     void updateCurrent(int index);
     void updatePingTime(int value, int max);

cockatrice/src/interface/widgets/utility/sequence_edit.cpp

@@ -2,6 +2,7 @@
 
 #include "../../../client/settings/cache_settings.h"
 #include "../../../client/settings/shortcuts_settings.h"
+#include "../../pixel_map_generator.h"
 
 #include <QHBoxLayout>
 #include <QKeyEvent>
@@ -14,8 +15,8 @@ SequenceEdit::SequenceEdit(const QString &_shortcutName, QWidget *parent) : QWid
     defaultButton = new QPushButton("", this);
 
     lineEdit->setMinimumWidth(70);
-    clearButton->setIcon(QPixmap("theme:icons/clearsearch"));
-    defaultButton->setIcon(QPixmap("theme:icons/update"));
+    clearButton->setIcon(themePixmap(QStringLiteral("icons/clearsearch")));
+    defaultButton->setIcon(themePixmap(QStringLiteral("icons/update")));
 
     auto *layout = new QHBoxLayout(this);
     layout->setContentsMargins(0, 0, 0, 0);

cockatrice/src/interface/widgets/visual_database_display/visual_database_display_filter_toolbar_widget.cpp

@@ -1,5 +1,6 @@
 #include "visual_database_display_filter_toolbar_widget.h"
 
+#include "../../pixel_map_generator.h"
 #include "../deck_editor/card_database_view.h"
 #include "visual_database_display_widget.h"
 
@@ -60,22 +61,22 @@ VisualDatabaseDisplayFilterToolbarWidget::VisualDatabaseDisplayFilterToolbarWidg
     });
 
     quickFilterSaveLoadWidget = new SettingsButtonWidget(this);
-    quickFilterSaveLoadWidget->setButtonIcon(QPixmap("theme:icons/floppy_disk"));
+    quickFilterSaveLoadWidget->setButtonIcon(themePixmap(QStringLiteral("icons/floppy_disk")));
 
     quickFilterNameWidget = new SettingsButtonWidget(this);
-    quickFilterNameWidget->setButtonIcon(QPixmap("theme:icons/pen_to_square"));
+    quickFilterNameWidget->setButtonIcon(themePixmap(QStringLiteral("icons/pen_to_square")));
 
     quickFilterMainTypeWidget = new SettingsButtonWidget(this);
-    quickFilterMainTypeWidget->setButtonIcon(QPixmap("theme:icons/circle_half_stroke"));
+    quickFilterMainTypeWidget->setButtonIcon(themePixmap(QStringLiteral("icons/circle_half_stroke")));
 
     quickFilterSubTypeWidget = new SettingsButtonWidget(this);
-    quickFilterSubTypeWidget->setButtonIcon(QPixmap("theme:icons/dragon"));
+    quickFilterSubTypeWidget->setButtonIcon(themePixmap(QStringLiteral("icons/dragon")));
 
     quickFilterSetWidget = new SettingsButtonWidget(this);
-    quickFilterSetWidget->setButtonIcon(QPixmap("theme:icons/scroll"));
+    quickFilterSetWidget->setButtonIcon(themePixmap(QStringLiteral("icons/scroll")));
 
     quickFilterFormatLegalityWidget = new SettingsButtonWidget(this);
-    quickFilterFormatLegalityWidget->setButtonIcon(QPixmap("theme:icons/scale_balanced"));
+    quickFilterFormatLegalityWidget->setButtonIcon(themePixmap(QStringLiteral("icons/scale_balanced")));
 
     retranslateUi();
 }

cockatrice/src/interface/widgets/visual_database_display/visual_database_display_widget.cpp

@@ -66,7 +66,7 @@ VisualDatabaseDisplayWidget::VisualDatabaseDisplayWidget(QWidget *parent,
     searchEdit->setPlaceholderText(tr("Search by card name (or search expressions)"));
     searchEdit->setClearButtonEnabled(true);
     searchEdit->addAction(loadColorAdjustedPixmap("theme:icons/search"), QLineEdit::LeadingPosition);
-    auto help = searchEdit->addAction(QPixmap("theme:icons/info"), QLineEdit::TrailingPosition);
+    auto help = searchEdit->addAction(themePixmap(QStringLiteral("icons/info")), QLineEdit::TrailingPosition);
     connect(help, &QAction::triggered, this, [this] { createSearchSyntaxHelpWindow(searchEdit); });
 
     setFocusProxy(searchEdit);
@@ -121,7 +121,7 @@ VisualDatabaseDisplayWidget::VisualDatabaseDisplayWidget(QWidget *parent,
 
     clearFilterWidget = new QToolButton();
     clearFilterWidget->setFixedSize(32, 32);
-    clearFilterWidget->setIcon(QPixmap("theme:icons/delete"));
+    clearFilterWidget->setIcon(themePixmap(QStringLiteral("icons/delete")));
     connect(clearFilterWidget, &QToolButton::clicked, this, [this] {
         filterModel->blockSignals(true);
         filterModel->filterTree()->blockSignals(true);

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

@@ -1,5 +1,6 @@
 #include "visual_deck_display_options_widget.h"
 
+#include "../../pixel_map_generator.h"
 #include "../tabs/visual_deck_editor/tab_deck_editor_visual.h"
 
 #include <libcockatrice/utility/qt_utils.h>
@@ -47,7 +48,7 @@ VisualDeckDisplayOptionsWidget::VisualDeckDisplayOptionsWidget(QWidget *parent)
     sortByLabel = new QLabel(this);
 
     sortCriteriaButton = new SettingsButtonWidget(this);
-    sortCriteriaButton->setButtonIcon(QPixmap("theme:icons/sort_arrow_down"));
+    sortCriteriaButton->setButtonIcon(themePixmap(QStringLiteral("icons/sort_arrow_down")));
 
     sortLabel = new QLabel(sortCriteriaButton);
     sortLabel->setWordWrap(true);
@@ -92,7 +93,7 @@ void VisualDeckDisplayOptionsWidget::retranslateUi()
     sortLabel->setText(tr("Click and drag to change the sort order within the groups"));
     sortCriteriaButton->setToolTip(tr("Configure how cards are sorted within their groups"));
     displayTypeButton->setButtonText(tr("Toggle Layout: Overlap"));
-    displayTypeButton->setButtonIcon(QPixmap("theme:icons/scales"));
+    displayTypeButton->setButtonIcon(themePixmap(QStringLiteral("icons/scales")));
     displayTypeButton->setToolTip(
         tr("Change how cards are displayed within zones (i.e. overlapped or fully visible.)"));
 }
@@ -117,11 +118,11 @@ void VisualDeckDisplayOptionsWidget::updateDisplayType()
     switch (currentDisplayType) {
         case DisplayType::Flat:
             displayTypeButton->setButtonText(tr("Toggle Layout: Flat"));
-            displayTypeButton->setButtonIcon(QPixmap("theme:icons/scroll"));
+            displayTypeButton->setButtonIcon(themePixmap(QStringLiteral("icons/scroll")));
             break;
         case DisplayType::Overlap:
             displayTypeButton->setButtonText(tr("Toggle Layout: Overlap"));
-            displayTypeButton->setButtonIcon(QPixmap("theme:icons/scales"));
+            displayTypeButton->setButtonIcon(themePixmap(QStringLiteral("icons/scales")));
             break;
     }
     emit displayTypeChanged(currentDisplayType);

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

@@ -4,6 +4,7 @@
 #include "../../../main.h"
 #include "../../deck_loader/deck_loader.h"
 #include "../../layouts/overlap_layout.h"
+#include "../../pixel_map_generator.h"
 #include "../cards/card_info_picture_with_text_overlay_widget.h"
 #include "../cards/deck_card_zone_display_widget.h"
 #include "../general/layout_containers/flow_widget.h"
@@ -131,7 +132,7 @@ void VisualDeckEditorWidget::initializeSearchBarAndCompleter()
 
     // Search button functionality
     searchPushButton = new CompactPushButton(searchContainer);
-    searchPushButton->setButtonIcon(QPixmap("theme:icons/search"));
+    searchPushButton->setButtonIcon(themePixmap(QStringLiteral("icons/search")));
     connect(searchPushButton, &QPushButton::clicked, this, [=, this]() {
         ExactCard card = CardDatabaseManager::query()->getCard({searchBar->text()});
         if (card) {

cockatrice/src/interface/widgets/visual_deck_storage/visual_deck_storage_search_widget.cpp

@@ -25,7 +25,7 @@ VisualDeckStorageSearchWidget::VisualDeckStorageSearchWidget(QWidget *parent) :
     searchBar->setClearButtonEnabled(true);
     searchBar->addAction(loadColorAdjustedPixmap("theme:icons/search"), QLineEdit::LeadingPosition);
 
-    auto help = searchBar->addAction(QPixmap("theme:icons/info"), QLineEdit::TrailingPosition);
+    auto help = searchBar->addAction(themePixmap(QStringLiteral("icons/info")), QLineEdit::TrailingPosition);
     connect(help, &QAction::triggered, this, [this] { createDeckSearchSyntaxHelpWindow(searchBar); });
 
     layout->addWidget(searchBar);

cockatrice/src/interface/widgets/visual_deck_storage/visual_deck_storage_widget.cpp

@@ -1,6 +1,7 @@
 #include "visual_deck_storage_widget.h"
 
 #include "../../../client/settings/cache_settings.h"
+#include "../../pixel_map_generator.h"
 #include "../quick_settings/settings_button_widget.h"
 #include "deck_preview/deck_preview_color_identity_filter_widget.h"
 #include "deck_preview/deck_preview_widget.h"
@@ -43,7 +44,7 @@ VisualDeckStorageWidget::VisualDeckStorageWidget(QWidget *parent) : QWidget(pare
     searchWidget = new VisualDeckStorageSearchWidget(this);
 
     refreshButton = new QToolButton(this);
-    refreshButton->setIcon(QPixmap("theme:icons/reload"));
+    refreshButton->setIcon(themePixmap(QStringLiteral("icons/reload")));
     refreshButton->setFixedSize(32, 32);
     connect(refreshButton, &QPushButton::clicked, this, &VisualDeckStorageWidget::refreshIfPossible);
 

cockatrice/src/interface/window_main.cpp

@@ -44,6 +44,7 @@
 #include "intents/intent_open_server_room_by_name.h"
 #include "intents/url_parser.h"
 #include "logger.h"
+#include "pixel_map_generator.h"
 #include "version_string.h"
 #include "widgets/dialogs/dlg_connect.h"
 #include "widgets/server/handle_public_servers.h"
@@ -271,7 +272,8 @@ void MainWindow::actAbout()
                 GITHUB_TROUBLESHOOTING_URL + "'>" + tr("Troubleshooting") + "</a><br>" + "<a href='" + GITHUB_FAQ_URL +
                 "'>" + tr("F.A.Q.") + "</a><br>"),
         QMessageBox::Ok, this);
-    mb.setIconPixmap(QPixmap("theme:cockatrice").scaled(64, 64, Qt::KeepAspectRatio, Qt::SmoothTransformation));
+    mb.setIconPixmap(
+        themePixmap(QStringLiteral("cockatrice")).scaled(64, 64, Qt::KeepAspectRatio, Qt::SmoothTransformation));
     mb.setTextInteractionFlags(Qt::TextBrowserInteraction);
     mb.exec();
 }
@@ -323,7 +325,7 @@ void MainWindow::retranslateUi()
     aRegister->setText(tr("&Register to server..."));
     aForgotPassword->setText(tr("&Restore password..."));
     aSettings->setText(tr("&Settings..."));
-    aSettings->setIcon(QPixmap("theme:icons/settings"));
+    aSettings->setIcon(themePixmap(QStringLiteral("icons/settings")));
     aExit->setText(tr("&Exit"));
 
 #if defined(__APPLE__) /* For OSX */
@@ -817,7 +819,7 @@ void MainWindow::createTrayIcon()
 
     trayIcon = new QSystemTrayIcon(this);
     trayIcon->setContextMenu(trayIconMenu);
-    trayIcon->setIcon(QPixmap("theme:cockatrice"));
+    trayIcon->setIcon(themePixmap(QStringLiteral("cockatrice")));
     trayIcon->show();
 }
 

cockatrice/src/main.cpp

@@ -349,7 +349,7 @@ int main(int argc, char *argv[])
     }
     qCInfo(MainLog) << "MainWindow constructor finished";
 
-    ui.setWindowIcon(QPixmap("theme:cockatrice"));
+    ui.setWindowIcon(themePixmap(QStringLiteral("cockatrice")));
     // set name of the app desktop file; used by wayland to load the window icon
     QGuiApplication::setDesktopFileName("cockatrice");
 

cockatrice/themes/Default/palette-default-dark.toml

@@ -61,3 +61,7 @@ ToolTipBase          = #ffffffdc
 ToolTipText          = #ff000000
 PlaceholderText      = #6effffff
 
+
+[AppColors]
+AccentStrong        = #ff148c3c
+AccentSoft          = #ff78c850

cockatrice/themes/Default/palette-default-light.toml

@@ -0,0 +1,67 @@
+[Palette]
+WindowText           = #ff000000
+Button               = #fff0f0f0
+Light                = #ffffffff
+Midlight             = #ffe3e3e3
+Dark                 = #ffa0a0a0
+Mid                  = #ffa0a0a0
+Text                 = #ff000000
+BrightText           = #ffffffff
+ButtonText           = #ff000000
+Base                 = #ffffffff
+Window               = #fff0f0f0
+Shadow               = #ff696969
+HighlightedText      = #ffffffff
+Link                 = #ff0d5f28
+LinkVisited          = #ff08401b
+AlternateBase        = #ffe9e7e3
+ToolTipBase          = #ffffffdc
+ToolTipText          = #ff000000
+PlaceholderText      = #80000000
+
+[Palette.Disabled]
+WindowText           = #ff787878
+Button               = #fff0f0f0
+Light                = #ffffffff
+Midlight             = #fff7f7f7
+Dark                 = #ffa0a0a0
+Mid                  = #ffa0a0a0
+Text                 = #ff787878
+BrightText           = #ffffffff
+ButtonText           = #ff787878
+Base                 = #fff0f0f0
+Window               = #fff0f0f0
+Shadow               = #ff000000
+HighlightedText      = #ffffffff
+Link                 = #ff0000ff
+LinkVisited          = #ffff00ff
+AlternateBase        = #fff7f7f7
+ToolTipBase          = #ffffffdc
+ToolTipText          = #ff000000
+PlaceholderText      = #80000000
+
+[Palette.Inactive]
+WindowText           = #ff000000
+Button               = #fff0f0f0
+Light                = #ffffffff
+Midlight             = #ffe3e3e3
+Dark                 = #ffa0a0a0
+Mid                  = #ffa0a0a0
+Text                 = #ff000000
+BrightText           = #ffffffff
+ButtonText           = #ff000000
+Base                 = #ffffffff
+Window               = #fff0f0f0
+Shadow               = #ff696969
+HighlightedText      = #ff000000
+Link                 = #ff0d5f28
+LinkVisited          = #ff08401b
+AlternateBase        = #ffe9e7e3
+ToolTipBase          = #ffffffdc
+ToolTipText          = #ff000000
+PlaceholderText      = #80000000
+
+
+[AppColors]
+AccentStrong        = #ff148c3c
+AccentSoft          = #ff78c850

cockatrice/themes/Fusion/palette-default-dark.toml

@@ -67,3 +67,7 @@ ToolTipText          = #ffd4d4d4
 PlaceholderText      = #80ffffff
 Accent               = #ff1e1e1e
 
+
+[AppColors]
+AccentStrong        = #ff148c3c
+AccentSoft          = #ff78c850

cockatrice/themes/Fusion/palette-default-light.toml

@@ -67,3 +67,7 @@ ToolTipText          = #ff000000
 PlaceholderText      = #80000000
 Accent               = #fff0f0f0
 
+
+[AppColors]
+AccentStrong        = #ff148c3c
+AccentSoft          = #ff78c850

libcockatrice_network/libcockatrice/network/client/abstract/abstract_client.cpp

@@ -253,3 +253,24 @@ PendingCommand *AbstractClient::prepareAdminCommand(const ::google::protobuf::Me
     c->GetReflection()->MutableMessage(c, cmd.GetDescriptor()->FindExtensionByName("ext"))->CopyFrom(cmd);
     return new PendingCommand(cont);
 }
+
+PendingCommand *AbstractClient::prepareDeveloperCommand(const ::google::protobuf::Message &cmd)
+{
+    CommandContainer cont;
+    DeveloperCommand *c = cont.add_developer_command();
+    // A developer command message may also be usable through other command
+    // families, so select the extension scoped to DeveloperCommand rather than
+    // guessing by name.
+    const ::google::protobuf::Descriptor *cmdDescriptor = cmd.GetDescriptor();
+    const ::google::protobuf::Descriptor *developerDescriptor = DeveloperCommand::descriptor();
+    const ::google::protobuf::FieldDescriptor *developerExtension = nullptr;
+    for (int i = 0; i < cmdDescriptor->extension_count(); ++i) {
+        if (cmdDescriptor->extension(i)->containing_type() == developerDescriptor) {
+            developerExtension = cmdDescriptor->extension(i);
+            break;
+        }
+    }
+    Q_ASSERT(developerExtension != nullptr);
+    c->GetReflection()->MutableMessage(c, developerExtension)->CopyFrom(cmd);
+    return new PendingCommand(cont);
+}

libcockatrice_network/libcockatrice/network/client/abstract/abstract_client.h

@@ -173,6 +173,7 @@ public:
     static PendingCommand *prepareRoomCommand(const ::google::protobuf::Message &cmd, int roomId);
     static PendingCommand *prepareModeratorCommand(const ::google::protobuf::Message &cmd);
     static PendingCommand *prepareAdminCommand(const ::google::protobuf::Message &cmd);
+    static PendingCommand *prepareDeveloperCommand(const ::google::protobuf::Message &cmd);
 
     QMap<QString, bool> clientFeatures;
 };

libcockatrice_network/libcockatrice/network/server/remote/game/server_abstract_player.cpp

@@ -66,6 +66,15 @@ Server_AbstractPlayer::Server_AbstractPlayer(Server_Game *_game,
 
 Server_AbstractPlayer::~Server_AbstractPlayer() = default;
 
+int Server_AbstractPlayer::getCardCount() const
+{
+    int result = 0;
+    for (auto *zone : zones) {
+        result += zone->getCards().size();
+    }
+    return result;
+}
+
 void Server_AbstractPlayer::prepareDestroy()
 {
     delete deck;

libcockatrice_network/libcockatrice/network/server/remote/game/server_abstract_player.h

@@ -43,6 +43,8 @@ public:
                           Server_AbstractUserInterface *_handler);
     ~Server_AbstractPlayer() override;
     void prepareDestroy() override;
+    /// Total cards across all of this player's zones. The caller must hold the game's mutex.
+    int getCardCount() const;
     const DeckList *getDeckList() const
     {
         return deck;

libcockatrice_network/libcockatrice/network/server/remote/game/server_game.cpp

@@ -32,6 +32,7 @@
 #include "server_spectator.h"
 
 #include <QDebug>
+#include <QElapsedTimer>
 #include <QRegularExpression>
 #include <QTimer>
 #include <google/protobuf/descriptor.h>
@@ -238,6 +239,17 @@ int Server_Game::getPlayerCount() const
     return participants.size() - getSpectatorCount();
 }
 
+int Server_Game::getCardsInGame() const
+{
+    QMutexLocker locker(&gameMutex);
+
+    int result = 0;
+    for (auto *player : getPlayers()) {
+        result += player->getCardCount();
+    }
+    return result;
+}
+
 int Server_Game::getSpectatorCount() const
 {
     QMutexLocker locker(&gameMutex);
@@ -330,6 +342,9 @@ void Server_Game::doStartGameIfReady(bool forceStartGame)
         }
     }
 
+    // Only actual starts are timed. The early returns above are no-ops.
+    QElapsedTimer startupTimer;
+    startupTimer.start();
     players = getPlayers(); // players could have been kicked, get new list of players
     if (lifecycleStrategy->onGameStarting(this) == Server_GameLifecycleStrategy::StartAction::Handled) {
         locker.unlock();
@@ -373,6 +388,7 @@ void Server_Game::doStartGameIfReady(bool forceStartGame)
 
     activePlayer = -1;
     nextTurn();
+    room->getServer()->observeGameStartDurationMs(startupTimer.nsecsElapsed() / 1000000);
 
     locker.unlock();
 

libcockatrice_network/libcockatrice/network/server/remote/game/server_game.h

@@ -123,6 +123,8 @@ public:
         return gameStarted;
     }
     int getPlayerCount() const;
+    /// Total cards across all players' zones. Takes gameMutex itself.
+    int getCardsInGame() const;
     int getSpectatorCount() const;
     QMap<int, Server_AbstractPlayer *> getPlayers() const;
     Server_AbstractPlayer *getPlayer(int id) const;

libcockatrice_network/libcockatrice/network/server/remote/server.h

@@ -180,6 +180,11 @@ public:
     {
         return false;
     }
+    /// Called once per actual game start with how long bringing every player's
+    /// zones online took, so servers can spot deck sizes that wedge threads.
+    virtual void observeGameStartDurationMs(qint64 /* elapsedMs */)
+    {
+    }
 
     Server_DatabaseInterface *getDatabaseInterface() const;
     int getNextLocalGameId()

libcockatrice_network/libcockatrice/network/server/remote/server_protocolhandler.cpp

@@ -388,6 +388,33 @@ Response::ResponseCode Server_ProtocolHandler::processAdminCommandContainer(cons
     return finalResponseCode;
 }
 
+Response::ResponseCode Server_ProtocolHandler::processDeveloperCommandContainer(const CommandContainer &cont,
+                                                                                ResponseContainer &rc)
+{
+    if (!userInfo) {
+        return Response::RespLoginNeeded;
+    }
+    if (!(userInfo->user_level() & ServerInfo_User::IsDeveloper)) {
+        return Response::RespLoginNeeded;
+    }
+
+    resetIdleTimer();
+
+    Response::ResponseCode finalResponseCode = Response::RespOk;
+    for (int i = cont.developer_command_size() - 1; i >= 0; --i) {
+        Response::ResponseCode resp = Response::RespInvalidCommand;
+        const DeveloperCommand &sc = cont.developer_command(i);
+        const int num = getPbExtension(sc);
+        logDebugMessage(getSafeDebugString(sc));
+
+        resp = processExtendedDeveloperCommand(num, sc, rc);
+        if (resp != Response::RespOk) {
+            finalResponseCode = resp;
+        }
+    }
+    return finalResponseCode;
+}
+
 void Server_ProtocolHandler::processCommandContainer(const CommandContainer &cont)
 {
     // Command processing must be disabled after prepareDestroy() has been called.
@@ -410,6 +437,8 @@ void Server_ProtocolHandler::processCommandContainer(const CommandContainer &con
         finalResponseCode = processModeratorCommandContainer(cont, responseContainer);
     } else if (cont.admin_command_size()) {
         finalResponseCode = processAdminCommandContainer(cont, responseContainer);
+    } else if (cont.developer_command_size()) {
+        finalResponseCode = processDeveloperCommandContainer(cont, responseContainer);
     } else {
         finalResponseCode = Response::RespInvalidCommand;
     }
@@ -454,11 +483,12 @@ void Server_ProtocolHandler::pingClockTimeout()
         prepareDestroy();
     }
 
-    // PrivLevel users, Moderators, and Admins are not subject to the server idle timeout policy
+    // PrivLevel users, Moderators, Admins, and Developers are not subject to the server idle timeout policy
     const bool hasPrivLevel = userInfo && QString::fromStdString(userInfo->privlevel()).toLower() != "none";
-    const bool isModOrAdmin =
-        userInfo && (userInfo->user_level() & (ServerInfo_User::IsModerator | ServerInfo_User::IsAdmin));
-    if (!hasPrivLevel && !isModOrAdmin) {
+    const bool isStaff =
+        userInfo && (userInfo->user_level() &
+                     (ServerInfo_User::IsModerator | ServerInfo_User::IsAdmin | ServerInfo_User::IsDeveloper));
+    if (!hasPrivLevel && !isStaff) {
         if ((server->getIdleClientTimeout() > 0) && (idleClientWarningSent)) {
             if (timeRunning - lastActionReceived > server->getIdleClientTimeout()) {
                 prepareDestroy();

libcockatrice_network/libcockatrice/network/server/remote/server_protocolhandler.h

@@ -27,6 +27,7 @@ class CommandContainer;
 class SessionCommand;
 class ModeratorCommand;
 class AdminCommand;
+class DeveloperCommand;
 
 class Command_Ping;
 class Command_Login;
@@ -98,6 +99,12 @@ private:
     {
         return Response::RespFunctionNotAllowed;
     }
+    Response::ResponseCode processDeveloperCommandContainer(const CommandContainer &cont, ResponseContainer &rc);
+    virtual Response::ResponseCode
+    processExtendedDeveloperCommand(int /* cmdType */, const DeveloperCommand & /* cmd */, ResponseContainer & /* rc */)
+    {
+        return Response::RespFunctionNotAllowed;
+    }
 
     void resetIdleTimer();
 private slots:
@@ -129,7 +136,7 @@ public:
         return timeRunning - lastDataReceived;
     }
     bool addSaidMessageSize(int size);
-    void processCommandContainer(const CommandContainer &cont);
+    virtual void processCommandContainer(const CommandContainer &cont);
 
     void sendProtocolItem(const Response &item);
     void sendProtocolItem(const SessionEvent &item);

libcockatrice_protocol/libcockatrice/protocol/pb/CMakeLists.txt

@@ -25,6 +25,7 @@ set(PROTO_FILES
     command_dump_zone.proto
     command_flip_card.proto
     command_game_say.proto
+    command_get_server_stats.proto
     command_inc_card_counter.proto
     command_inc_counter.proto
     command_kick_from_game.proto
@@ -71,6 +72,7 @@ set(PROTO_FILES
     context_ready_start.proto
     context_set_sideboard_lock.proto
     context_undo_draw.proto
+    developer_commands.proto
     event_add_to_list.proto
     event_attach_card.proto
     event_change_zone_properties.proto
@@ -140,6 +142,7 @@ set(PROTO_FILES
     response_forgotpasswordrequest.proto
     response_get_admin_notes.proto
     response_get_games_of_user.proto
+    response_get_server_stats.proto
     response_get_user_info.proto
     response_join_room.proto
     response_list_users.proto

libcockatrice_protocol/libcockatrice/protocol/pb/admin_commands.proto

@@ -37,6 +37,7 @@ message Command_AdjustMod {
     required string user_name = 1;
     optional bool should_be_mod = 2;
     optional bool should_be_judge = 3;
+    optional bool should_be_developer = 4;
 }
 
 message Command_ResetUserPassword {

libcockatrice_protocol/libcockatrice/protocol/pb/command_get_server_stats.proto

@@ -0,0 +1,8 @@
+syntax = "proto2";
+import "developer_commands.proto";
+
+message Command_GetServerStats {
+    extend DeveloperCommand {
+        optional Command_GetServerStats ext = 1000;
+    }
+}

libcockatrice_protocol/libcockatrice/protocol/pb/commands.proto

@@ -4,6 +4,7 @@ import "game_commands.proto";
 import "room_commands.proto";
 import "moderator_commands.proto";
 import "admin_commands.proto";
+import "developer_commands.proto";
 
 message CommandContainer {
     optional uint64 cmd_id = 1;
@@ -16,4 +17,5 @@ message CommandContainer {
     repeated RoomCommand room_command = 102;
     repeated ModeratorCommand moderator_command = 103;
     repeated AdminCommand admin_command = 104;
+    repeated DeveloperCommand developer_command = 105;
 }

libcockatrice_protocol/libcockatrice/protocol/pb/developer_commands.proto

@@ -0,0 +1,8 @@
+syntax = "proto2";
+message DeveloperCommand {
+    enum DeveloperCommandType {
+        GET_SERVER_STATS = 1000;
+        VIEWLOG_HISTORY = 1001;
+    }
+    extensions 100 to max;
+}

libcockatrice_protocol/libcockatrice/protocol/pb/moderator_commands.proto

@@ -1,4 +1,5 @@
 syntax = "proto2";
+import "developer_commands.proto";
 message ModeratorCommand {
     enum ModeratorCommandType {
         BAN_FROM_SERVER = 1000;
@@ -80,6 +81,9 @@ message Command_ViewLogHistory {
     extend ModeratorCommand {
         optional Command_ViewLogHistory ext = 1005;
     }
+    extend DeveloperCommand {
+        optional Command_ViewLogHistory dev_ext = 1001;
+    }
     optional string user_name = 1;       // user that created message
     optional string ip_address = 2;      // ip address of user that created message
     optional string game_name = 3;       // client id of user that created the message

libcockatrice_protocol/libcockatrice/protocol/pb/response.proto

@@ -77,6 +77,7 @@ message Response {
         FORGOT_PASSWORD_REQUEST = 1016; // Response to password reset request
         PASSWORD_SALT = 1017;           // Response containing password salt
         GET_ADMIN_NOTES = 1018;         // Response with admin notes
+        GET_SERVER_STATS = 1019;        // Response with server status statistics
         REPLAY_LIST = 1100;             // Response listing replays
         REPLAY_DOWNLOAD = 1101;         // Response for replay download
         REPLAY_GET_CODE = 1102;         // Response containing replay code

libcockatrice_protocol/libcockatrice/protocol/pb/response_get_server_stats.proto

@@ -0,0 +1,41 @@
+syntax = "proto2";
+import "response.proto";
+
+message CommandStats {
+    optional uint32 kind_index = 1;       // 0=session, 1=room, 2=game, 3=moderator, 4=admin, 5=developer
+    optional uint32 extension_number = 2; // protobuf extension number within the kind
+    optional string command_name = 3;     // e.g. "session/Command_Ping"
+    optional uint64 count = 4;            // number of times observed
+    optional uint64 total_ms = 5;         // cumulative processing milliseconds
+}
+
+message Response_GetServerStats {
+    extend Response {
+        optional Response_GetServerStats ext = 1220;
+    }
+
+    optional uint64 users_count = 1;
+    optional uint64 mods_count = 2;
+    optional uint64 games_count = 3;
+
+    // Traffic recorded during the last status update tick
+    optional uint64 tx_bytes = 4;
+    optional uint64 rx_bytes = 5;
+
+    optional uint64 uptime_secs = 6;
+    optional uint64 timest = 7; // unix timestamp of the snapshot
+
+    // Live metrics from MetricsRegistry (reset on server restart)
+    optional uint64 cards_in_games = 8;
+    optional uint64 eventloop_stalls_total = 9;
+    optional uint64 eventloop_last_stall_ms = 10;
+    optional uint64 eventloop_max_stall_ms = 11;
+    optional uint64 total_commands = 12;
+    optional uint64 total_command_time_ms = 13;
+    optional int32 active_command_types = 14;
+    optional uint64 game_start_count = 15;
+    optional uint64 game_start_total_ms = 16;
+
+    // Per-command breakdown (only types with count > 0)
+    repeated CommandStats command_stats = 20;
+}

libcockatrice_protocol/libcockatrice/protocol/pb/serverinfo_user.proto

@@ -8,6 +8,7 @@ message ServerInfo_User {
         IsModerator = 4;
         IsAdmin = 8;
         IsJudge = 16;
+        IsDeveloper = 32;
     };
     message PawnColorsOverride {
         optional string left_side = 1;

oracle/CMakeLists.txt

@@ -28,6 +28,7 @@ set(oracle_SOURCES
     ../cockatrice/src/client/settings/card_counter_settings.cpp
     ../cockatrice/src/client/settings/shortcuts_settings.cpp
     ../cockatrice/src/client/network/update/client/release_channel.cpp
+    ../cockatrice/src/interface/pixel_map_generator.cpp
     ../cockatrice/src/interface/theme_config.cpp
     ../cockatrice/src/interface/theme_manager.cpp
     ../cockatrice/src/interface/widgets/quick_settings/settings_button_widget.cpp

oracle/src/oracleimporter.cpp

@@ -110,7 +110,7 @@ bool OracleImporter::readSetsFromByteArray(QByteArray data)
  * A lower index means a higher priority.
  */
 static const QStringList MAIN_CARD_TYPE_PRIORITY = {"Planeswalker", "Creature", "Land",       "Sorcery",
-                                                     "Instant",      "Artifact", "Enchantment"};
+                                                    "Instant",      "Artifact", "Enchantment"};
 
 /**
  * Returns the priority (index) of the given main card type. Known types map to their

servatrice/CMakeLists.txt

@@ -6,7 +6,9 @@ project(Servatrice VERSION "${PROJECT_VERSION_MAJOR}.${PROJECT_VERSION_MINOR}.${
 
 set(servatrice_SOURCES
     src/email_parser.cpp
+    src/event_loop_watchdog.cpp
     src/main.cpp
+    src/metrics_registry.cpp
     src/servatrice.cpp
     src/servatrice_connection_pool.cpp
     src/servatrice_database_interface.cpp

servatrice/servatrice.ini.example

@@ -382,6 +382,19 @@ max_reports_per_day=10
 ; Maximum number of report comments a single user can post per hour; default is 30; set to 0 to disable the limit
 max_comments_per_hour=30
 
+[metrics]
+; Command containers that take longer than this many milliseconds are logged
+; as slow commands. Set to 0 to disable the log line. A latency spike produces
+; one warning per slow container with no rate limiting of its own -- a bad
+; patch can briefly flood the log, which is how you notice it.
+slow_command_ms=500
+
+; Each socket pool thread runs a watchdog heartbeat. If a heartbeat arrives
+; this many milliseconds late, the stall is logged and exposed as
+; servatrice_eventloop_* metrics in the Developer tab. Set to 0 to disable
+; the watchdogs.
+stall_warn_ms=2000
+
 [logging]
 ; Admin/Moderators can query the stored logs for information when looking up reports by various players. This
 ; option can allow or disallow them from doing so.

servatrice/servatrice.sql

@@ -25,6 +25,9 @@ INSERT INTO cockatrice_schema_version VALUES(36);
 -- users and user data tables
 CREATE TABLE IF NOT EXISTS `cockatrice_users` (
   `id` int(7) unsigned zerofill NOT NULL auto_increment,
+  -- Bitfield of staff levels: 1 = admin (implies moderator), 2 = moderator,
+  -- 4 = judge, 8 = developer. Operators set these by hand with
+  -- "UPDATE cockatrice_users SET admin = ...".
   `admin` tinyint(1) NOT NULL,
   `name` varchar(35) NOT NULL,
   `realname` varchar(255) NOT NULL,

servatrice/src/event_loop_watchdog.cpp

@@ -0,0 +1,34 @@
+/**
+ * @file event_loop_watchdog.cpp
+ * @ingroup Servatrice
+ */
+
+#include "event_loop_watchdog.h"
+
+#include "servatrice.h"
+
+#include <QTimer>
+
+EventLoopWatchdog::EventLoopWatchdog(Servatrice *_servatrice, QString _threadName)
+    : QObject(nullptr), servatrice(_servatrice), threadName(std::move(_threadName))
+{
+}
+
+void EventLoopWatchdog::start()
+{
+    heartbeatTimer = new QTimer(this);
+    sinceLastTick.start();
+    connect(heartbeatTimer, &QTimer::timeout, this, &EventLoopWatchdog::checkHeartbeat);
+    heartbeatTimer->start(HeartbeatIntervalMs);
+}
+
+void EventLoopWatchdog::checkHeartbeat()
+{
+    const qint64 elapsedMs = sinceLastTick.restart();
+    const qint64 overshootMs = qMax<qint64>(0, elapsedMs - HeartbeatIntervalMs);
+    if (overshootMs < servatrice->getMetricsStallWarnMs()) {
+        return;
+    }
+
+    servatrice->observeEventLoopStall(threadName, overshootMs);
+}

servatrice/src/event_loop_watchdog.h

@@ -0,0 +1,50 @@
+/**
+ * @file event_loop_watchdog.h
+ * @ingroup Servatrice
+ */
+
+#ifndef EVENT_LOOP_WATCHDOG_H
+#define EVENT_LOOP_WATCHDOG_H
+
+#include <QElapsedTimer>
+#include <QObject>
+#include <QString>
+
+class Servatrice;
+class QTimer;
+
+/**
+ * @brief Detects blocked or overloaded worker event loops.
+ *
+ * One instance lives in each socket pool thread. A heartbeat timer tick that
+ * arrives late means the loop spent that time elsewhere: busy work, a queued
+ * slot, or a hard wedge. Overshoots past the configured threshold bump
+ * lock-free counters on the metrics registry and log one warning per stall,
+ * so a stuck pool thread becomes visible instead of silent lag.
+ */
+class EventLoopWatchdog : public QObject
+{
+    Q_OBJECT
+public:
+    /// How often the heartbeat expects to fire. Small enough to catch short stalls.
+    static constexpr int HeartbeatIntervalMs = 500;
+
+    EventLoopWatchdog(Servatrice *_servatrice, QString _threadName);
+
+    /**
+     * Starts the heartbeat timer. Must be invoked queued after the instance
+     * was moved to its target thread so the timer lives there too.
+     */
+    void start();
+
+private slots:
+    void checkHeartbeat();
+
+private:
+    Servatrice *servatrice;
+    QString threadName;
+    QElapsedTimer sinceLastTick;
+    QTimer *heartbeatTimer = nullptr;
+};
+
+#endif

servatrice/src/metrics_registry.cpp

@@ -0,0 +1,70 @@
+#include "metrics_registry.h"
+
+#include <QList>
+
+void MetricsRegistry::observeCommand(int typeId, qint64 elapsedMs)
+{
+    if (typeId < 0 || typeId >= MaxTypes) {
+        typeId = MaxTypes - 1; // overflow slot keeps misrouted ids visible
+    }
+    if (elapsedMs < 0) {
+        elapsedMs = 0;
+    }
+
+    TypeStats &stats = slotFor(typeId);
+    stats.count.fetch_add(1, std::memory_order_relaxed);
+    stats.totalMs.fetch_add(elapsedMs, std::memory_order_relaxed);
+    totalCommandsCounter.fetch_add(1, std::memory_order_relaxed);
+    totalTimeCounter.fetch_add(elapsedMs, std::memory_order_relaxed);
+}
+
+void MetricsRegistry::observeGameStartDurationMs(qint64 elapsedMs)
+{
+    if (elapsedMs < 0) {
+        elapsedMs = 0;
+    }
+
+    gameStartStats.count.fetch_add(1, std::memory_order_relaxed);
+    gameStartStats.totalMs.fetch_add(elapsedMs, std::memory_order_relaxed);
+}
+
+MetricsRegistry::TypeStats &MetricsRegistry::slotFor(int typeId)
+{
+    return typeSlots[static_cast<size_t>(typeId)];
+}
+
+const MetricsRegistry::TypeStats &MetricsRegistry::slotFor(int typeId) const
+{
+    return typeSlots[static_cast<size_t>(typeId)];
+}
+
+int MetricsRegistry::activeTypeCount() const
+{
+    int active = 0;
+    for (int type = 0; type < MaxTypes; ++type) {
+        if (slotFor(type).count.load(std::memory_order_relaxed) > 0) {
+            ++active;
+        }
+    }
+    return active;
+}
+
+QList<MetricsRegistry::ActiveTypeStats> MetricsRegistry::collectActiveStats() const
+{
+    QList<ActiveTypeStats> result;
+    for (int type = 0; type < MaxTypes; ++type) {
+        const TypeStats &stats = slotFor(type);
+        const qint64 count = stats.count.load(std::memory_order_relaxed);
+        if (count == 0) {
+            continue;
+        }
+        result.append({type, count, stats.totalMs.load(std::memory_order_relaxed)});
+    }
+    return result;
+}
+
+MetricsRegistry::GameStartSnapshot MetricsRegistry::getGameStartSnapshot() const
+{
+    return {gameStartStats.count.load(std::memory_order_relaxed),
+            gameStartStats.totalMs.load(std::memory_order_relaxed)};
+}

servatrice/src/metrics_registry.h

@@ -0,0 +1,120 @@
+/**
+ * @file metrics_registry.h
+ * @ingroup Servatrice
+ */
+
+#ifndef METRICS_REGISTRY_H
+#define METRICS_REGISTRY_H
+
+#include <QList>
+#include <QString>
+#include <array>
+#include <atomic>
+
+/**
+ * @brief Lock-free accumulation of command processing statistics.
+ *
+ * observeCommand() is called once per processed command from whichever socket
+ * thread handled it. It uses relaxed atomic adds on preallocated storage only,
+ * so it introduces no locks, allocations, or shared cache-line ping-pong
+ * beyond the unavoidable counter updates.
+ *
+ * Reading happens rarely (metrics scraping), accepts momentary tears between
+ * related counters, and therefore also needs no synchronization.
+ *
+ * Only counts and totals are retained. An earlier Prometheus-style cumulative
+ * histogram (per-type, time-bucketed) was cut because nothing in the server
+ * ever wrote it out; it belongs to the future /metrics exporter that needs it.
+ */
+class MetricsRegistry
+{
+public:
+    /**
+     * Extension numbers are only unique per command kind, so recorded ids
+     * combine the kind index with the protobuf extension number.
+     *
+     * The stride is only as wide as it needs to be: 1280 is the first round
+     * number above the largest extension actually in use (ModeratorCommand =
+     * 1206) and keeps the preallocated TypeStats array small. Bump it if a new
+     * command exceeds it.
+     */
+    static constexpr int KindStride = 1280;
+
+    static constexpr int NumKinds = 6;
+
+    static constexpr const char *KindNames[NumKinds] = {"session", "room", "game", "moderator", "admin", "developer"};
+
+    /// Upper bound on distinct command type ids (see typeIdFor).
+    static constexpr int MaxTypes = NumKinds * KindStride;
+
+    /// Guard against typeIdFor() overflowing into the neighbouring kind's slots.
+    static_assert(KindStride > 1206, "KindStride must exceed the highest command extension number in use");
+
+    static int typeIdFor(int kindIndex, int extensionNumber)
+    {
+        return kindIndex * KindStride + extensionNumber;
+    }
+
+    void observeCommand(int typeId, qint64 elapsedMs);
+
+    /**
+     * Records how long one game start took to bring every player's zones
+     * online. Kept separate from command timings because it is triggered by
+     * the server itself and can dwarf any single command when decks are huge.
+     */
+    void observeGameStartDurationMs(qint64 elapsedMs);
+
+    /// Total number of observed commands across all types.
+    qint64 totalCommands() const
+    {
+        return totalCommandsCounter.load(std::memory_order_relaxed);
+    }
+
+    /// Cumulative processing milliseconds across all types.
+    qint64 totalTimeMs() const
+    {
+        return totalTimeCounter.load(std::memory_order_relaxed);
+    }
+
+    /// Number of distinct type slots that have seen at least one sample.
+    int activeTypeCount() const;
+
+    struct ActiveTypeStats
+    {
+        int typeId;
+        qint64 count;
+        qint64 totalMs;
+    };
+
+    /**
+     * Returns stats for every type slot that has seen at least one sample.
+     * Callers resolve the numeric type id to a human-readable label via
+     * typeIdFor()/KindNames as needed.
+     */
+    QList<ActiveTypeStats> collectActiveStats() const;
+
+    struct GameStartSnapshot
+    {
+        qint64 count;
+        qint64 totalMs;
+    };
+
+    GameStartSnapshot getGameStartSnapshot() const;
+
+private:
+    struct TypeStats
+    {
+        std::atomic<qint64> count{0};
+        std::atomic<qint64> totalMs{0};
+    };
+
+    TypeStats &slotFor(int typeId);
+    const TypeStats &slotFor(int typeId) const;
+
+    std::array<TypeStats, MaxTypes> typeSlots{};
+    TypeStats gameStartStats{};
+    std::atomic<qint64> totalCommandsCounter{0};
+    std::atomic<qint64> totalTimeCounter{0};
+};
+
+#endif

servatrice/src/servatrice.cpp

@@ -20,6 +20,7 @@
 #include "servatrice.h"
 
 #include "email_parser.h"
+#include "event_loop_watchdog.h"
 #include "isl_interface.h"
 #include "main.h"
 #include "servatrice_connection_pool.h"
@@ -38,6 +39,7 @@
 #include <QStringList>
 #include <QTimer>
 #include <QUrl>
+#include <game/server_game.h>
 #include <iostream>
 #include <libcockatrice/deck_list/deck_list.h>
 #include <libcockatrice/protocol/featureset.h>
@@ -63,6 +65,7 @@ Servatrice_GameServer::Servatrice_GameServer(Servatrice *_server,
         server->addDatabaseInterface(newThread, newDatabaseInterface);
 
         newThread->start();
+        server->watchWorkerThread(newThread);
         QMetaObject::invokeMethod(newDatabaseInterface, "initDatabase", Qt::BlockingQueuedConnection,
                                   Q_ARG(QSqlDatabase, _sqlDatabase));
 
@@ -86,7 +89,6 @@ void Servatrice_GameServer::incomingConnection(qintptr socketDescriptor)
     Servatrice_ConnectionPool *pool = findLeastUsedConnectionPool();
 
     auto ssi = new TcpServerSocketInterface(server, pool->getDatabaseInterface());
-    connect(ssi, SIGNAL(incTxBytes(qint64)), this, SLOT(incTxBytes(qint64)));
     ssi->moveToThread(pool->thread());
     pool->addClient();
     connect(ssi, SIGNAL(destroyed()), pool, SLOT(removeClient()));
@@ -131,6 +133,7 @@ Servatrice_WebsocketGameServer::Servatrice_WebsocketGameServer(Servatrice *_serv
         server->addDatabaseInterface(newThread, newDatabaseInterface);
 
         newThread->start();
+        server->watchWorkerThread(newThread);
         QMetaObject::invokeMethod(newDatabaseInterface, "initDatabase", Qt::BlockingQueuedConnection,
                                   Q_ARG(QSqlDatabase, _sqlDatabase));
 
@@ -156,7 +159,6 @@ void Servatrice_WebsocketGameServer::onNewConnection()
     Servatrice_ConnectionPool *pool = findLeastUsedConnectionPool();
 
     auto ssi = new WebsocketServerSocketInterface(server, pool->getDatabaseInterface());
-    connect(ssi, SIGNAL(incTxBytes(quint64)), this, SLOT(incTxBytes(quint64)));
     /*
      * Due to a Qt limitation, websockets can't be moved to another thread.
      * This will hopefully change in Qt6 if QtWebSocket will be integrated in QtNetwork
@@ -226,6 +228,13 @@ bool Servatrice::initServer()
 {
 
     serverId = getServerID();
+
+    // METRICS (always active. Slow-command logging and stall watchdogs are
+    // controlled by their respective thresholds below). Read up front so the
+    // values are available before any pool thread is started and watchdogged.
+    metricsSlowCommandMs = settingsCache->value("metrics/slow_command_ms", 500).toInt();
+    metricsStallWarnMs = qMax(0, settingsCache->value("metrics/stall_warn_ms", 2000).toInt());
+
     if (getAuthenticationMethodString() == "sql") {
         qDebug() << "Authenticating method: sql";
         authenticationMethod = AuthenticationSql;
@@ -470,9 +479,55 @@ bool Servatrice::initServer()
     }
 
     setRequiredFeatures(getRequiredFeatures());
+
     return true;
 }
 
+void Servatrice::observeGameStartDurationMs(qint64 elapsedMs)
+{
+    metricsRegistry.observeGameStartDurationMs(elapsedMs);
+}
+
+void Servatrice::observeEventLoopStall(const QString &threadName, qint64 overshootMs)
+{
+    eventLoopStallsTotal.fetch_add(1, std::memory_order_relaxed);
+    eventLoopLastStallMs.store(overshootMs, std::memory_order_relaxed);
+    qint64 prevMax = eventLoopMaxStallMs.load(std::memory_order_relaxed);
+    while (overshootMs > prevMax &&
+           !eventLoopMaxStallMs.compare_exchange_weak(prevMax, overshootMs, std::memory_order_relaxed)) {
+        // retry until the max is at least as high as the new sample
+    }
+
+    qWarning() << "Event loop stall in" << threadName << "- heartbeat overshot by" << overshootMs << "ms";
+}
+
+void Servatrice::watchWorkerThread(QThread *thread)
+{
+    if (metricsStallWarnMs <= 0) {
+        return; // watchdogs disabled via metrics/stall_warn_ms = 0
+    }
+
+    auto *watchdog = new EventLoopWatchdog(this, thread->objectName());
+    connect(thread, &QThread::finished, watchdog, &QObject::deleteLater);
+    watchdog->moveToThread(thread);
+    QMetaObject::invokeMethod(watchdog, &EventLoopWatchdog::start, Qt::QueuedConnection);
+}
+
+qint64 Servatrice::getCardsInGamesTotal() const
+{
+    qint64 total = 0;
+    QReadLocker roomsLocker(&roomsLock); // locking order: roomsLock before gamesLock/gameMutex
+    QMapIterator<int, Server_Room *> roomIterator(rooms);
+    while (roomIterator.hasNext()) {
+        Server_Room *room = roomIterator.next().value();
+        QReadLocker gamesLocker(&room->gamesLock);
+        for (auto *game : room->getGames()) {
+            total += game->getCardsInGame();
+        }
+    }
+    return total;
+}
+
 void Servatrice::addDatabaseInterface(QThread *thread, Servatrice_DatabaseInterface *databaseInterface)
 {
     databaseInterfaces.insert(thread, databaseInterface);

servatrice/src/servatrice.h

@@ -20,6 +20,8 @@
 #ifndef SERVATRICE_H
 #define SERVATRICE_H
 
+#include "metrics_registry.h"
+
 #include <QDateTime>
 #include <QHostAddress>
 #include <QMetaType>
@@ -30,6 +32,7 @@
 #include <QSslKey>
 #include <QTcpServer>
 #include <QWebSocketServer>
+#include <atomic>
 #include <libcockatrice/protocol/pb/response_report_stats.pb.h>
 #include <memory>
 #include <server.h>
@@ -170,6 +173,12 @@ private:
     int uptime;
     QMutex txBytesMutex, rxBytesMutex;
     quint64 txBytes, rxBytes;
+    MetricsRegistry metricsRegistry;
+    int metricsSlowCommandMs = 500;
+    int metricsStallWarnMs = 2000;
+    std::atomic<qint64> eventLoopStallsTotal{0}; ///< heartbeat overshoots past the warn threshold
+    std::atomic<qint64> eventLoopLastStallMs{0}; ///< overshoot of the most recent stall
+    std::atomic<qint64> eventLoopMaxStallMs{0};  ///< worst overshoot seen since process start
 
     QString shutdownReason;
     int shutdownMinutes;
@@ -286,6 +295,49 @@ public:
     void incRxBytes(quint64 num);
     void addDatabaseInterface(QThread *thread, Servatrice_DatabaseInterface *databaseInterface);
 
+    // Metrics (see [metrics] section in servatrice.ini.example)
+    MetricsRegistry &getMetricsRegistry()
+    {
+        return metricsRegistry;
+    }
+    /**
+     * Sums cards across all zones of all running games. Each game takes its
+     * own gameMutex -- the hot per-game lock every game action contends on --
+     * and then iterates every player's zones, so the scrape cost is really
+     * O(total cards in play) plus one mutex acquisition per live game. Keep
+     * scrapes infrequent in big multiplayer rooms.
+     */
+    qint64 getCardsInGamesTotal() const;
+    int getMetricsSlowCommandMs() const
+    {
+        return metricsSlowCommandMs;
+    }
+    /// Heartbeat overshoot that counts as a stall. A value of 0 disables the watchdogs.
+    int getMetricsStallWarnMs() const
+    {
+        return metricsStallWarnMs;
+    }
+    void observeGameStartDurationMs(qint64 elapsedMs) override;
+    qint64 getEventLoopStallsTotal() const
+    {
+        return eventLoopStallsTotal.load(std::memory_order_relaxed);
+    }
+    qint64 getEventLoopLastStallMs() const
+    {
+        return eventLoopLastStallMs.load(std::memory_order_relaxed);
+    }
+    qint64 getEventLoopMaxStallMs() const
+    {
+        return eventLoopMaxStallMs.load(std::memory_order_relaxed);
+    }
+    /// Records one heartbeat overshoot and logs a single warning for it.
+    void observeEventLoopStall(const QString &threadName, qint64 overshootMs);
+    /**
+     * Installs an EventLoopWatchdog in @p thread. Called once per socket pool
+     * thread right after it starts.
+     */
+    void watchWorkerThread(QThread *thread);
+
     bool islConnectionExists(int _serverId) const;
     void addIslInterface(int _serverId, IslInterface *interface);
     void removeIslInterface(int _serverId);

servatrice/src/servatrice_database_interface.cpp

@@ -641,6 +641,10 @@ ServerInfo_User Servatrice_DatabaseInterface::evalUserQueryResult(const QSqlQuer
         userLevel |= ServerInfo_User::IsJudge;
     }
 
+    if (is_admin & 8) {
+        userLevel |= ServerInfo_User::IsDeveloper;
+    }
+
     result.set_user_level(userLevel);
 
     const QString country = query->value(3).toString();
@@ -1448,7 +1452,7 @@ QList<ServerInfo_ModeratorLogin> Servatrice_DatabaseInterface::getModeratorLastL
     QSqlQuery *query = prepareQuery("SELECT u.name, u.admin, UNIX_TIMESTAMP(a.last_login) "
                                     "FROM {prefix}_users u "
                                     "LEFT JOIN {prefix}_user_analytics a ON a.id = u.id "
-                                    "WHERE (u.admin & 7) <> 0 ORDER BY u.name");
+                                    "WHERE (u.admin & 15) <> 0 ORDER BY u.name");
 
     if (!execSqlQuery(query)) {
         qCWarning(DatabaseInterfaceLog) << "Failed to collect moderator login information: SQL Error";
@@ -1469,6 +1473,9 @@ QList<ServerInfo_ModeratorLogin> Servatrice_DatabaseInterface::getModeratorLastL
         if (isAdmin & 4) {
             userLevel |= ServerInfo_User::IsJudge;
         }
+        if (isAdmin & 8) {
+            userLevel |= ServerInfo_User::IsDeveloper;
+        }
         loginDetails.set_user_level(userLevel);
 
         if (!query->value(2).isNull()) {
@@ -1480,6 +1487,38 @@ QList<ServerInfo_ModeratorLogin> Servatrice_DatabaseInterface::getModeratorLastL
     return results;
 }
 
+Servatrice_DatabaseInterface::UptimeSnapshot Servatrice_DatabaseInterface::getLatestUptimeSnapshot(int serverId)
+{
+    UptimeSnapshot snapshot;
+
+    if (!checkSql()) {
+        return snapshot;
+    }
+
+    QSqlQuery *query = prepareQuery("SELECT users_count, mods_count, games_count, tx_bytes, rx_bytes, uptime, "
+                                    "UNIX_TIMESTAMP(timest) FROM {prefix}_uptime "
+                                    "WHERE id_server = :id_server ORDER BY timest DESC LIMIT 1");
+    query->bindValue(":id_server", serverId);
+
+    if (!execSqlQuery(query)) {
+        qCWarning(DatabaseInterfaceLog) << "Failed to collect server stats snapshot: SQL Error";
+        return snapshot;
+    }
+
+    if (query->next()) {
+        snapshot.valid = true;
+        snapshot.usersCount = query->value(0).toULongLong();
+        snapshot.modsCount = query->value(1).toULongLong();
+        snapshot.gamesCount = query->value(2).toULongLong();
+        snapshot.txBytes = query->value(3).toULongLong();
+        snapshot.rxBytes = query->value(4).toULongLong();
+        snapshot.uptimeSecs = query->value(5).toULongLong();
+        snapshot.timest = query->value(6).toULongLong();
+    }
+
+    return snapshot;
+}
+
 bool Servatrice_DatabaseInterface::removeUserAvatar(const QString &userName)
 {
     if (!checkSql()) {

servatrice/src/servatrice_database_interface.h

@@ -140,6 +140,21 @@ public:
     QList<ServerInfo_UserSession> getUserSessions(const QString &userName, int limit);
     QList<ServerInfo_UserAlt> getUserAlts(const QString &userName);
     QList<ServerInfo_ModeratorLogin> getModeratorLastLogins();
+
+    // Uptime snapshot as recorded by Servatrice::statusUpdate() into the
+    // {prefix}_uptime table. valid is false when no snapshot exists yet.
+    struct UptimeSnapshot
+    {
+        bool valid = false;
+        quint64 usersCount = 0;
+        quint64 modsCount = 0;
+        quint64 gamesCount = 0;
+        quint64 txBytes = 0;
+        quint64 rxBytes = 0;
+        quint64 uptimeSecs = 0;
+        quint64 timest = 0;
+    };
+    UptimeSnapshot getLatestUptimeSnapshot(int serverId);
     bool removeUserAvatar(const QString &userName);
     bool addForgotPassword(const QString &user);
     bool removeForgotPassword(const QString &user) override;