support arbitrary color schemes in ollie-gui

Scan ~/.local/share/color-schemes/ in addition to /usr/share/color-schemes/
so user-installed themes (e.g. Catppuccin) are discovered. Mode is now any
scheme name rather than just system/light/dark. Settings dialog uses a
ComboBox listing all available schemes plus "System".

gui/main-kf5.qml

@@ -48,31 +48,21 @@ ApplicationWindow {
                 font.bold: true
             }
 
-            Label {
-                text: "Uses KDE Breeze color schemes"
-                opacity: 0.6
-                wrapMode: Text.Wrap
+            ComboBox {
+                id: schemeCombo
                 Layout.fillWidth: true
-                font.pixelSize: Qt.application.font.pixelSize * 0.9
-            }
-
-            ColumnLayout {
-                spacing: 8
-
-                RadioButton {
-                    text: "Use system theme"
-                    checked: theme.mode === "system"
-                    onClicked: theme.mode = "system"
+                model: ["System"].concat(theme.availableSchemes)
+                currentIndex: {
+                    if (theme.mode === "system") return 0
+                    var idx = theme.availableSchemes.indexOf(theme.mode)
+                    return idx >= 0 ? idx + 1 : 0
                 }
-                RadioButton {
-                    text: "Breeze Light"
-                    checked: theme.mode === "light"
-                    onClicked: theme.mode = "light"
-                }
-                RadioButton {
-                    text: "Breeze Dark"
-                    checked: theme.mode === "dark"
-                    onClicked: theme.mode = "dark"
+                onActivated: {
+                    if (currentIndex === 0) {
+                        theme.mode = "system"
+                    } else {
+                        theme.mode = theme.availableSchemes[currentIndex - 1]
+                    }
                 }
             }
 

gui/main.qml

@@ -51,34 +51,21 @@ ApplicationWindow {
                 font.bold: true
             }
 
-            Label {
-                text: "Uses KDE Breeze color schemes from /usr/share/color-schemes/"
-                opacity: 0.6
-                wrapMode: Text.Wrap
+            ComboBox {
+                id: schemeCombo
                 Layout.fillWidth: true
-                font.pixelSize: Qt.application.font.pixelSize * 0.9
-            }
-
-            ColumnLayout {
-                spacing: 8
-
-                RadioButton {
-                    id: systemRadio
-                    text: "Use system theme"
-                    checked: theme.mode === "system"
-                    onClicked: theme.mode = "system"
+                model: ["System"].concat(theme.availableSchemes)
+                currentIndex: {
+                    if (theme.mode === "system") return 0
+                    let idx = theme.availableSchemes.indexOf(theme.mode)
+                    return idx >= 0 ? idx + 1 : 0
                 }
-                RadioButton {
-                    id: lightRadio
-                    text: "Breeze Light"
-                    checked: theme.mode === "light"
-                    onClicked: theme.mode = "light"
-                }
-                RadioButton {
-                    id: darkRadio
-                    text: "Breeze Dark"
-                    checked: theme.mode === "dark"
-                    onClicked: theme.mode = "dark"
+                onActivated: {
+                    if (currentIndex === 0) {
+                        theme.mode = "system"
+                    } else {
+                        theme.mode = theme.availableSchemes[currentIndex - 1]
+                    }
                 }
             }
 

gui/thememanager.cpp

@@ -40,13 +40,10 @@ QString ThemeManager::mode() const
 
 void ThemeManager::setMode(const QString &mode)
 {
-    QString m = mode.toLower();
-    if (m != "system" && m != "light" && m != "dark")
-        return;
-    if (m == m_mode)
+    if (mode == m_mode)
         return;
 
-    m_mode = m;
+    m_mode = mode;
     saveSettings();
     applyPalette();
     emit modeChanged();
@@ -56,11 +53,16 @@ void ThemeManager::setMode(const QString &mode)
 QStringList ThemeManager::availableSchemes() const
 {
     QStringList schemes;
-    QDir dir(SCHEMES_DIR);
-    const auto entries = dir.entryInfoList({"*.colors"}, QDir::Files, QDir::Name);
-    for (const auto &entry : entries) {
-        schemes << entry.baseName();
+    QStringList dirs = schemeDirs();
+    for (const QString &dirPath : dirs) {
+        QDir dir(dirPath);
+        const auto entries = dir.entryInfoList({"*.colors"}, QDir::Files, QDir::Name);
+        for (const auto &entry : entries) {
+            if (!schemes.contains(entry.baseName()))
+                schemes << entry.baseName();
+        }
     }
+    schemes.sort(Qt::CaseInsensitive);
     return schemes;
 }
 
@@ -76,12 +78,12 @@ bool ThemeManager::isDark() const
 void ThemeManager::applyPalette()
 {
     QString path;
-    if (m_mode == "light") {
-        path = schemePath("BreezeLight");
-    } else if (m_mode == "dark") {
-        path = schemePath("BreezeDark");
-    } else {
+    if (m_mode == "system") {
         path = systemSchemePath();
+    } else {
+        // Mode is a scheme name (e.g. "BreezeLight", "BreezeDark",
+        // "CatppuccinMochaMauve", etc.)
+        path = schemePath(m_mode);
     }
 
     if (path.isEmpty() || !QFile::exists(path)) {
@@ -279,9 +281,27 @@ QString ThemeManager::systemSchemePath() const
 
 QString ThemeManager::schemePath(const QString &name) const
 {
+    for (const QString &dir : schemeDirs()) {
+        QString path = QString("%1/%2.colors").arg(dir, name);
+        if (QFile::exists(path))
+            return path;
+    }
+    // Fallback to system dir even if file doesn't exist
     return QString("%1/%2.colors").arg(SCHEMES_DIR, name);
 }
 
+QStringList ThemeManager::schemeDirs() const
+{
+    QStringList dirs;
+    // User dir first (higher priority)
+    QString userDir = QStandardPaths::writableLocation(QStandardPaths::GenericDataLocation)
+                      + "/color-schemes";
+    if (QDir(userDir).exists())
+        dirs << userDir;
+    dirs << SCHEMES_DIR;
+    return dirs;
+}
+
 // --- Font methods ---
 
 QString ThemeManager::fontFamily() const
@@ -405,9 +425,7 @@ void ThemeManager::loadSettings()
 
     if (QFile::exists(configFile)) {
         QSettings settings(configFile, QSettings::IniFormat);
-        m_mode = settings.value("General/mode", "system").toString().toLower();
-        if (m_mode != "system" && m_mode != "light" && m_mode != "dark")
-            m_mode = "system";
+        m_mode = settings.value("General/mode", "system").toString();
 
         m_fontFamily = settings.value("Font/family", "").toString();
         m_fontSize = settings.value("Font/size", 0).toInt();

gui/thememanager.h

@@ -107,6 +107,7 @@ private:
     QColor parseColor(const QVariant &value) const;
     QString systemSchemePath() const;
     QString schemePath(const QString &name) const;
+    QStringList schemeDirs() const;
     void loadSettings();
     void saveSettings();