diff --git a/CMakeLists.txt b/CMakeLists.txt
index 8303361..fe906a6 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,6 +1,6 @@
 cmake_minimum_required(VERSION 3.16)
 
-project(Wallpaper_Carousel VERSION 0.1 LANGUAGES CXX)
+project(WallReel VERSION 0.1 LANGUAGES CXX)
 
 set(EXECUTABLE_NAME "wallreel")
 set(CORELIB_NAME "wallreel-core")
diff --git a/Tests/tst_configmgr.cpp b/Tests/tst_configmgr.cpp
index 267bba1..0f7cc5c 100644
--- a/Tests/tst_configmgr.cpp
+++ b/Tests/tst_configmgr.cpp
@@ -89,7 +89,7 @@ void TestConfigMgr::testDefaults() {
     QVERIFY(config.getActionConfig().onSelected.isEmpty());
     QVERIFY(config.getActionConfig().onPreview.isEmpty());
     QVERIFY(config.getActionConfig().onRestore.isEmpty());
-    QVERIFY(config.getActionConfig().saveState.isEmpty());
+    QVERIFY(config.getActionConfig().saveStateConfig.isEmpty());
 }
 
 void TestConfigMgr::testFullConfigParsing() {
diff --git a/WallReel/Core/CMakeLists.txt b/WallReel/Core/CMakeLists.txt
index 444bdbb..c91d5d1 100644
--- a/WallReel/Core/CMakeLists.txt
+++ b/WallReel/Core/CMakeLists.txt
@@ -7,6 +7,7 @@ qt_add_qml_module(${CORELIB_NAME}
     Image/provider.hpp Image/provider.cpp
     Palette/data.hpp
     Palette/manager.hpp Palette/manager.cpp
+    Config/data.hpp
     Config/manager.hpp Config/manager.cpp
     logger.hpp logger.cpp
     wallpaperservice.hpp wallpaperservice.cpp
diff --git a/WallReel/Core/Config/data.hpp b/WallReel/Core/Config/data.hpp
new file mode 100644
index 0000000..fe8f209
--- /dev/null
+++ b/WallReel/Core/Config/data.hpp
@@ -0,0 +1,119 @@
+#ifndef WALLREEL_CONFIG_DATA_HPP
+#define WALLREEL_CONFIG_DATA_HPP
+
+#include <QColor>
+#include <QHash>
+#include <QList>
+#include <QRegularExpression>
+#include <QSize>
+#include <QString>
+#include <QStringList>
+
+// Config entries:
+//
+// wallpaper.paths              array   []      List of paths to images.
+// wallpaper.dirs               array   []      Directories to search for images.
+// wallpaper.dirs[].path        string  ""      Path to the directory.
+// wallpaper.dirs[].recursive   boolean false   Whether to search the directory recursively.
+// wallpaper.excludes           array   []      Exclude patterns (regex)
+//
+// palettes                     array   []
+// palettes[].name              string  ""      Name of the palette
+// palettes[].colors            array   []      List of colors in the palette
+// palettes[].colors[].name     string  ""      Name of the color
+// palettes[].colors[].value    string  ""      Color value in hex format, e.g. "#ff0000" for red
+//
+// action.previewDebounceTime   number  300     Debounce time for preview action in milliseconds
+// action.printSelected         boolean true    Whether to print the selected wallpaper path to stdout on confirm
+// action.printPreview          boolean false   Whether to print the previewed wallpaper path to stdout on preview
+// action.onSelected            string  ""      Command to execute on confirmation ({{ path }} -> full path)
+// action.onPreview             string  ""      Command to execute on preview ({{ path }} -> full path)
+// action.saveState             array   []      Useful for restore command
+// action.saveState[].key       string  ""      Key of value to save, used as {{ key }} in onRestore command
+// action.saveState[].default   string  ""      Value to save, used when "cmd" is not set or command execution fails or output is empty
+// action.saveState[].cmd       string  ""      Command that outputs(to stdout) the value to save when executed
+// action.saveState[].timeout   number  3000    Timeout for executing "cmd" in milliseconds. 0 or negative means no timeout
+// action.onRestore             string  ""      Command to execute on restore ({{ key }} -> value defined or obtained in saveState)
+//
+// style.image_width            number  320     Width of each image
+// style.image_height           number  200     Height of each image
+// style.image_focus_scale      number  1.5     Scale of the focused image (relative to unfocused image)
+// style.window_width           number  750     Initial window width
+// style.window_height          number  500     Initial window height
+//
+// sort.type                    string  "name"  Sorting type: "none", "name", "date", "size"
+// sort.reverse                 boolean false   Whether to reverse the sorting order
+//                                              Normal order: name: lexicographical, e.g. "a.jpg" before "b.jpg"
+//                                                            date: older before newer
+//                                                            size: smaller before larger
+
+namespace WallReel::Core::Config {
+
+inline const QString s_DefaultConfigFileName = "config.json";
+
+enum class SortType : int {
+    None = 0,  // "none"
+    Name,      // "name"
+    Date,      // "date"
+    Size,      // "size"
+};
+
+struct WallpaperConfigItems {
+    struct WallpaperDirConfigItem {
+        QString path;
+        bool recursive;
+    };
+
+    QStringList paths;
+    QList<WallpaperDirConfigItem> dirs;
+    QList<QRegularExpression> excludes;
+};
+
+struct PaletteConfigItems {
+    struct PaletteColorConfigItem {
+        QString name;
+        QColor value;
+    };
+
+    struct PaletteConfigItem {
+        QString name;
+        QList<PaletteColorConfigItem> colors;
+    };
+
+    QList<PaletteConfigItem> palettes;
+};
+
+struct ActionConfigItems {
+    struct SaveStateItem {
+        QString key;
+        QString defaultVal;
+        QString cmd;
+        int timeout = 3000;
+    };
+
+    QList<SaveStateItem> saveStateConfig;
+    QHash<QString, QString> saveState;
+    QString onSelected;
+    QString onPreview;
+    QString onRestore;
+    int previewDebounceTime = 300;  // milliseconds
+    bool printSelected      = true;
+    bool printPreview       = false;
+};
+
+struct StyleConfigItems {
+    double imageFocusScale = 1.5;
+    int imageWidth         = 320;
+    int imageHeight        = 200;
+    int windowWidth        = 750;
+    int windowHeight       = 500;
+};
+
+struct SortConfigItems {
+    SortType type = SortType::Name;
+    bool reverse  = false;
+};
+
+}  // namespace WallReel::Core::Config
+
+#endif  // WALLREEL_CONFIG_DATA_HPP
diff --git a/WallReel/Core/Config/manager.cpp b/WallReel/Core/Config/manager.cpp
index a4db166..7418724 100644
--- a/WallReel/Core/Config/manager.cpp
+++ b/WallReel/Core/Config/manager.cpp
@@ -5,8 +5,10 @@
 #include <QJsonArray>
 #include <QJsonDocument>
 #include <QJsonObject>
+#include <QProcess>
 #include <QProcessEnvironment>
 #include <QStandardPaths>
+#include <QTimer>
 
 #include "Utils/misc.hpp"
 #include "logger.hpp"
@@ -179,13 +181,27 @@ void WallReel::Core::Config::Manager::_loadActionConfig(const QJsonObject& root)
             m_actionConfig.printPreview = val.toBool();
         }
     }
-    if (config.contains("saveState")) {
-        const auto& val = config["saveState"];
-        if (val.isObject()) {
-            QJsonObject obj = val.toObject();
-            for (const auto& key : obj.keys()) {
-                if (obj[key].isString()) {
-                    m_actionConfig.saveState.insert(key, obj[key].toString());
+    if (config.contains("saveState") && config["saveState"].isArray()) {
+        const QJsonArray& arr = config["saveState"].toArray();
+        for (const auto& item : arr) {
+            if (item.isObject()) {
+                QJsonObject obj = item.toObject();
+                ActionConfigItems::SaveStateItem sItem;
+                if (obj.contains("key") && obj["key"].isString()) {
+                    sItem.key = obj["key"].toString();
+                }
+                if (obj.contains("default") && obj["default"].isString()) {
+                    sItem.defaultVal = obj["default"].toString();
+                }
+                if (obj.contains("cmd") && obj["cmd"].isString()) {
+                    sItem.cmd = obj["cmd"].toString();
+                }
+                if (obj.contains("timeout") && obj["timeout"].isDouble()) {
+                    sItem.timeout = obj["timeout"].toInt();
+                }
+                if (!sItem.key.isEmpty()) {
+                    m_actionConfig.saveStateConfig.append(sItem);
+                    m_actionConfig.saveState.insert(sItem.key, sItem.defaultVal);
                 }
             }
         }
@@ -339,3 +355,98 @@ void WallReel::Core::Config::Manager::_loadWallpapers() {
 
     Logger::info(QString("Found %1 files").arg(paths.size()));
 }
+
+void WallReel::Core::Config::Manager::captureState() {
+    m_pendingCaptures = 0;
+
+    const auto& items = m_actionConfig.saveStateConfig;
+    if (items.isEmpty()) {
+        emit stateCaptured();
+        return;
+    }
+
+    for (const auto& item : items) {
+        if (!item.cmd.isEmpty()) {
+            m_pendingCaptures++;
+        }
+    }
+
+    if (m_pendingCaptures == 0) {
+        emit stateCaptured();
+        return;
+    }
+
+    for (const auto& item : items) {
+        if (item.cmd.isEmpty()) continue;
+
+        QProcess* process = new QProcess(this);
+        QTimer* timer     = nullptr;
+        if (item.timeout > 0) {
+            timer = new QTimer(this);
+            timer->setSingleShot(true);
+            timer->setInterval(item.timeout > 0 ? item.timeout : std::numeric_limits<int>::max());
+        }
+
+        QString key        = item.key;
+        QString defaultVal = item.defaultVal;
+
+        auto onFinished = [this, process, timer, key, defaultVal](const QString& output, bool success) {
+            if (timer) {
+                timer->stop();
+                timer->deleteLater();
+            }
+
+            process->disconnect();
+
+            QString result = success ? output : defaultVal;
+            if (result.isEmpty()) result = defaultVal;
+
+            _onCaptureResult(key, result);
+            process->deleteLater();
+        };
+
+        if (timer) {
+            // Timeout handler
+            connect(timer, &QTimer::timeout, this, [process, onFinished, key]() {
+                Logger::warn(QString("Timeout capturing state for key '%1'").arg(key));
+                if (process->state() != QProcess::NotRunning) {
+                    process->kill();
+                } else {
+                    onFinished(QString(), false);
+                }
+            });
+        }
+
+        // Finished handler
+        connect(process, &QProcess::finished, this, [process, onFinished](int exitCode, QProcess::ExitStatus exitStatus) {
+            bool success = (exitStatus == QProcess::NormalExit && exitCode == 0);
+            QString output;
+            if (success) {
+                output = QString::fromUtf8(process->readAllStandardOutput()).trimmed();
+            }
+            onFinished(output, success);
+        });
+
+        // Error handler
+        connect(process, &QProcess::errorOccurred, this, [process, onFinished, key](QProcess::ProcessError error) {
+            if (error == QProcess::FailedToStart) {
+                Logger::warn(QString("Failed to start state command for key '%1'").arg(key));
+                onFinished(QString(), false);
+            }
+        });
+
+        if (timer) {
+            timer->start();
+        }
+        process->startCommand(item.cmd);
+    }
+}
+
+void WallReel::Core::Config::Manager::_onCaptureResult(const QString& key, const QString& value) {
+    // This is all in main thread, so no lock needed
+    m_actionConfig.saveState[key] = value;
+    m_pendingCaptures--;
+    if (m_pendingCaptures == 0) {
+        emit stateCaptured();
+    }
+}
diff --git a/WallReel/Core/Config/manager.hpp b/WallReel/Core/Config/manager.hpp
index 32795ef..bae8f1b 100644
--- a/WallReel/Core/Config/manager.hpp
+++ b/WallReel/Core/Config/manager.hpp
@@ -1,107 +1,10 @@
 #ifndef WALLREEL_CONFIGMGR_HPP
 #define WALLREEL_CONFIGMGR_HPP
 
-#include <QColor>
-#include <QObject>
-#include <QRegularExpression>
-#include <QSize>
-#include <QString>
-#include <QStringList>
-
-// Config entries:
-//
-// wallpaper.paths              array   []      List of paths to images.
-// wallpaper.dirs               array   []      Directories to search for images.
-// wallpaper.dirs[].path        string  ""      Path to the directory.
-// wallpaper.dirs[].recursive   boolean false   Whether to search the directory recursively.
-// wallpaper.excludes           array   []      Exclude patterns (regex)
-//
-// palettes                     array   []
-// palettes[].name              string  ""      Name of the palette
-// palettes[].colors            array   []      List of colors in the palette
-// palettes[].colors[].name     string  ""      Name of the color
-// palettes[].colors[].value    string  ""      Color value in hex format, e.g. "#ff0000" for red
-//
-// action.previewDebounceTime   number  300     Minimum debounce time for preview action in milliseconds
-// action.printSelected         boolean false   Whether to print the selected wallpaper path to stdout on confirm
-// action.printPreview          boolean false   Whether to print the previewed wallpaper path to stdout on preview
-// action.saveState             object  {}      Key-value pairs to save the state, useful for restore command
-// action.onRestore             string  ""      Command to execute on restore ({{ key }} -> value in saveState)
-// action.onSelected            string  ""      Command to execute on confirmation ({{ path }} -> full path)
-// action.onPreview             string  ""      Command to execute on preview ({{ path }} -> full path)
-//
-// style.image_width            number  320     Width of each image
-// style.image_height           number  200     Height of each image
-// style.image_focus_scale      number  1.5     Scale of the focused image (relative to unfocused image)
-// style.window_width           number  750     Initial window width
-// style.window_height          number  500     Initial window height
-//
-// sort.type                    string  "name"  Sorting type: "none", "name", "date", "size"
-// sort.reverse                 boolean false   Whether to reverse the sorting order
-//                                              Normal order: name: lexicographical, e.g. "a.jpg" before "b.jpg"
-//                                                            date: older before newer
-//                                                            size: smaller before larger
+#include "data.hpp"
 
 namespace WallReel::Core::Config {
 
-static const QString s_DefaultConfigFileName = "config.json";
-
-enum class SortType : int {
-    None = 0,  // "none"
-    Name,      // "name"
-    Date,      // "date"
-    Size,      // "size"
-};
-
-struct WallpaperConfigItems {
-    struct WallpaperDirConfigItem {
-        QString path;
-        bool recursive;
-    };
-
-    QStringList paths;
-    QList<WallpaperDirConfigItem> dirs;
-    QList<QRegularExpression> excludes;
-};
-
-struct PaletteConfigItems {
-    struct PaletteColorConfigItem {
-        QString name;
-        QColor value;
-    };
-
-    struct PaletteConfigItem {
-        QString name;
-        QList<PaletteColorConfigItem> colors;
-    };
-
-    QList<PaletteConfigItem> palettes;
-};
-
-struct ActionConfigItems {
-
-    QHash<QString, QString> saveState;
-    QString onSelected;
-    QString onPreview;
-    QString onRestore;
-    int previewDebounceTime = 300;  // milliseconds
-    bool printSelected      = false;
-    bool printPreview       = false;
-};
-
-struct StyleConfigItems {
-    double imageFocusScale = 1.5;
-    int imageWidth         = 320;
-    int imageHeight        = 200;
-    int windowWidth        = 750;
-    int windowHeight       = 500;
-};
-
-struct SortConfigItems {
-    SortType type = SortType::Name;
-    bool reverse  = false;
-};
-
 class Manager : public QObject {
     Q_OBJECT
 
@@ -148,7 +51,10 @@ class Manager : public QObject {
         return QSize{m_styleConfig.imageWidth, m_styleConfig.imageHeight} * m_styleConfig.imageFocusScale;
     }
 
-    const QString m_configDir;
+    Q_INVOKABLE void captureState();
+
+  signals:
+    void stateCaptured();
 
   private:
     void _loadConfig(const QString& configPath);
@@ -158,8 +64,10 @@ class Manager : public QObject {
     void _loadActionConfig(const QJsonObject& config);
     void _loadStyleConfig(const QJsonObject& config);
     void _loadSortConfig(const QJsonObject& config);
+    void _onCaptureResult(const QString& key, const QString& value);
 
   private:
+    const QString m_configDir;
     WallpaperConfigItems m_wallpaperConfig;
     PaletteConfigItems m_paletteConfig;
     ActionConfigItems m_actionConfig;
@@ -167,6 +75,8 @@ class Manager : public QObject {
     SortConfigItems m_sortConfig;
 
     QStringList m_wallpapers;
+
+    int m_pendingCaptures = 0;
 };
 
 }  // namespace WallReel::Core::Config
diff --git a/WallReel/Core/Image/model.hpp b/WallReel/Core/Image/model.hpp
index 4d39ccf..1efe318 100644
--- a/WallReel/Core/Image/model.hpp
+++ b/WallReel/Core/Image/model.hpp
@@ -6,7 +6,7 @@
 #include <QTimer>
 #include <atomic>
 
-#include "Config/manager.hpp"
+#include "Config/data.hpp"
 #include "provider.hpp"
 
 namespace WallReel::Core::Image {
diff --git a/WallReel/Core/Palette/domcolor.cpp b/WallReel/Core/Palette/domcolor.cpp
new file mode 100644
index 0000000..444ca60
--- /dev/null
+++ b/WallReel/Core/Palette/domcolor.cpp
@@ -0,0 +1,94 @@
+#include "domcolor.hpp"
+
+static constexpr int scaleMaxWidth  = 128;
+static constexpr int scaleMaxHeight = 128;
+// See /misc/ColorArgTest/index.html for visualizing the effect of different powers
+static constexpr double weightSaturationPower = 2.0;
+static constexpr double weightLightnessPower  = 2.0;
+static constexpr int numBins                  = 36;  // 360 degrees / 10 degrees per bin
+
+static double getWeight(const QColor& color) {
+    int h, s, l;
+    color.getHsl(&h, &s, &l);
+    if (h < 0) return 0.0;  // Skip undefined hues
+
+    double sNorm = s / 255.0;
+
+    double dist  = std::abs(l - 128.0) / 128.0;
+    double lNorm = 1.0 - dist;
+
+    // // satPower=2, lightPower=2
+    // return std::pow(sNorm, weightSaturationPower) * std::pow(lNorm, weightLightnessPower);
+    // Since these are just simple squares, no need to use std::pow() here
+    return sNorm * sNorm * lNorm * lNorm;
+}
+
+static QColor getWeightedDominantColor(const QImage& image) {
+    if (image.isNull()) return QColor();
+
+    // QImage scaledImg = image.scaled(128, 128, Qt::IgnoreAspectRatio, Qt::SmoothTransformation);
+    QImage* scaledImg = nullptr;
+    if (image.width() > ::scaleMaxWidth || image.height() > ::scaleMaxHeight) {
+        scaledImg = new QImage(image.scaled(::scaleMaxWidth, ::scaleMaxHeight, Qt::IgnoreAspectRatio, Qt::SmoothTransformation));
+    } else {
+        scaledImg = new QImage(image);
+    }
+
+    struct HueBin {
+        double totalWeight = 0.0;
+        double sumR        = 0.0;
+        double sumG        = 0.0;
+        double sumB        = 0.0;
+    };
+
+    QVector<HueBin> bins(::numBins);
+
+    for (int y = 0; y < scaledImg->height(); ++y) {
+        for (int x = 0; x < scaledImg->width(); ++x) {
+            QColor color = scaledImg->pixelColor(x, y);
+
+            int hue = color.hue();
+            if (hue < 0) continue;  // Skip grayscale pixels
+
+            double weight = getWeight(color);
+            // Filter out low-weight pixels to reduce noise
+            if (weight < 0.05) continue;
+
+            int binIndex = (hue / 10) % ::numBins;
+
+            bins[binIndex].totalWeight += weight;
+            bins[binIndex].sumR += color.redF() * weight;
+            bins[binIndex].sumG += color.greenF() * weight;
+            bins[binIndex].sumB += color.blueF() * weight;
+        }
+    }
+    delete scaledImg;
+
+    // Find the bin with the highest total weight
+    int maxBinIndex  = -1;
+    double maxWeight = 0.0;
+    for (int i = 0; i < ::numBins; ++i) {
+        if (bins[i].totalWeight > maxWeight) {
+            maxWeight   = bins[i].totalWeight;
+            maxBinIndex = i;
+        }
+    }
+
+    // If all filtered (e.g. grayscale image), return a default color
+    if (maxBinIndex == -1 || maxWeight <= 0.0) {
+        return QColor(Qt::gray);
+    }
+
+    // Calculate the average color for the winning bin
+    const HueBin& winningBin = bins[maxBinIndex];
+
+    int finalR = std::round((winningBin.sumR / winningBin.totalWeight) * 255.0);
+    int finalG = std::round((winningBin.sumG / winningBin.totalWeight) * 255.0);
+    int finalB = std::round((winningBin.sumB / winningBin.totalWeight) * 255.0);
+
+    return QColor(finalR, finalG, finalB);
+}
+
+QColor WallReel::Core::Palette::getDominantColor(const QImage& image) {
+    return ::getWeightedDominantColor(image);
+}
diff --git a/WallReel/Core/Palette/domcolor.hpp b/WallReel/Core/Palette/domcolor.hpp
new file mode 100644
index 0000000..fc27f76
--- /dev/null
+++ b/WallReel/Core/Palette/domcolor.hpp
@@ -0,0 +1,12 @@
+#ifndef WALLREEL_CORE_PALETTE_DOMCOLOR_HPP
+#define WALLREEL_CORE_PALETTE_DOMCOLOR_HPP
+
+#include <QImage>
+
+namespace WallReel::Core::Palette {
+
+QColor getDominantColor(const QImage& image);
+
+}  // namespace WallReel::Core::Palette
+
+#endif  // WALLREEL_CORE_PALETTE_DOMCOLOR_HPP
diff --git a/WallReel/Core/Palette/manager.hpp b/WallReel/Core/Palette/manager.hpp
index fca4cf1..c2775bb 100644
--- a/WallReel/Core/Palette/manager.hpp
+++ b/WallReel/Core/Palette/manager.hpp
@@ -1,7 +1,7 @@
 #ifndef WALLREEL_PALETTE_MANAGER_HPP
 #define WALLREEL_PALETTE_MANAGER_HPP
 
-#include "Config/manager.hpp"
+#include "Config/data.hpp"
 #include "data.hpp"
 
 namespace WallReel::Core::Palette {
diff --git a/WallReel/Core/Utils/colorextractor.hpp b/WallReel/Core/Utils/colorextractor.hpp
deleted file mode 100644
index 8b13789..0000000
--- a/WallReel/Core/Utils/colorextractor.hpp
+++ /dev/null
@@ -1 +0,0 @@
-
diff --git a/WallReel/Core/wallpaperservice.hpp b/WallReel/Core/wallpaperservice.hpp
index aac6c0f..a323292 100644
--- a/WallReel/Core/wallpaperservice.hpp
+++ b/WallReel/Core/wallpaperservice.hpp
@@ -4,7 +4,7 @@
 #include <QProcess>
 #include <QTimer>
 
-#include "Config/manager.hpp"
+#include "Config/data.hpp"
 #include "Image/data.hpp"
 
 namespace WallReel::Core {
diff --git a/WallReel/UI/CMakeLists.txt b/WallReel/UI/CMakeLists.txt
index 20b2745..ff8924a 100644
--- a/WallReel/UI/CMakeLists.txt
+++ b/WallReel/UI/CMakeLists.txt
@@ -6,4 +6,5 @@ qt_add_qml_module(${UILIB_NAME}
     Pages/LoadingScreen.qml
     Pages/CarouselScreen.qml
     Modules/Carousel.qml
+    Modules/TitleBar.qml
 )
diff --git a/WallReel/UI/Main.qml b/WallReel/UI/Main.qml
index feea694..052fe2c 100644
--- a/WallReel/UI/Main.qml
+++ b/WallReel/UI/Main.qml
@@ -6,10 +6,10 @@ import WallReel.UI.Pages
 ApplicationWindow {
     width: Config.windowWidth
     height: Config.windowHeight
-    minimumWidth: width
-    maximumWidth: width
-    minimumHeight: height
-    maximumHeight: height
+    // minimumWidth: width
+    // maximumWidth: width
+    // minimumHeight: height
+    // maximumHeight: height
     visible: true
     title: qsTr("Hello World")
 
diff --git a/WallReel/UI/Modules/TitleBar.qml b/WallReel/UI/Modules/TitleBar.qml
new file mode 100644
index 0000000..cc4a8e6
--- /dev/null
+++ b/WallReel/UI/Modules/TitleBar.qml
@@ -0,0 +1,27 @@
+import QtQuick
+import QtQuick.Controls
+
+Item {
+    id: root
+
+    property string title: ""
+    // start from 0
+    property int index: 0
+    property int totalCount: 0
+    property int maxTitleLength: 50
+
+    Label {
+        text: (root.index + 1) + " / " + root.totalCount
+        font.pixelSize: 12
+        anchors.left: parent.left
+        anchors.leftMargin: 10
+        anchors.verticalCenter: parent.verticalCenter
+    }
+
+    Label {
+        text: root.title.length > root.maxTitleLength ? root.title.substring(0, root.maxTitleLength) + "..." : root.title
+        font.pixelSize: 12
+        anchors.centerIn: parent
+    }
+
+}
diff --git a/WallReel/UI/Pages/CarouselScreen.qml b/WallReel/UI/Pages/CarouselScreen.qml
index 85bb6ac..b71138e 100644
--- a/WallReel/UI/Pages/CarouselScreen.qml
+++ b/WallReel/UI/Pages/CarouselScreen.qml
@@ -41,10 +41,11 @@ Item {
         anchors.margins: 20
         spacing: 20
 
-        Label {
-            text: (ImageModel.dataAt(carousel.currentIndex, "imgName") ?? "") + " (" + (carousel.currentIndex + 1) + "/" + carousel.count + ")"
-            font.pixelSize: 12
-            Layout.alignment: Qt.AlignHCenter
+        TitleBar {
+            title: ImageModel.dataAt(carousel.currentIndex, "imgName") ?? ""
+            index: carousel.currentIndex
+            totalCount: carousel.count
+            Layout.fillWidth: true
         }
 
         Carousel {
diff --git a/misc/ColorArgTest/index.html b/misc/ColorArgTest/index.html
new file mode 100644
index 0000000..e1bc9d4
--- /dev/null
+++ b/misc/ColorArgTest/index.html
@@ -0,0 +1,216 @@
+<!doctype html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>Color Arg Test</title>
+    <style>
+      body {
+        display: flex;
+        font-family: sans-serif;
+      }
+      .left-panel {
+        flex: 1;
+        padding: 20px;
+        border-right: 1px solid #ccc;
+      }
+      .right-panel {
+        flex: 1;
+        padding: 20px;
+      }
+      #image-preview {
+        max-width: 100%;
+        max-height: 500px;
+        margin-top: 10px;
+        display: none;
+      }
+      .control-group {
+        margin-bottom: 20px;
+      }
+      label {
+        display: block;
+        margin-bottom: 5px;
+      }
+      #color-box {
+        width: 100px;
+        height: 100px;
+        border: 1px solid #000;
+        margin-top: 20px;
+        background-color: #ccc;
+      }
+    </style>
+  </head>
+  <body>
+    <div class="left-panel">
+      <input type="file" id="image-upload" accept="image/*" />
+      <br />
+      <img id="image-preview" alt="Image Preview" />
+    </div>
+
+    <div class="right-panel">
+      <div class="control-group">
+        <label for="saturation-power">Saturation Power: <span id="sat-val">1.0</span></label>
+        <input type="range" id="saturation-power" min="1" max="5" step="0.1" value="1" />
+      </div>
+
+      <div class="control-group">
+        <label for="lightness-power">Lightness Power: <span id="light-val">1.0</span></label>
+        <input type="range" id="lightness-power" min="1" max="5" step="0.1" value="1" />
+      </div>
+
+      <div id="color-box"></div>
+    </div>
+
+    <canvas id="hidden-canvas" style="display: none"></canvas>
+
+    <script>
+      const imageUpload = document.getElementById('image-upload');
+      const imagePreview = document.getElementById('image-preview');
+      const hiddenCanvas = document.getElementById('hidden-canvas');
+      const ctx = hiddenCanvas.getContext('2d');
+
+      const satSlider = document.getElementById('saturation-power');
+      const lightSlider = document.getElementById('lightness-power');
+      const satValDisplay = document.getElementById('sat-val');
+      const lightValDisplay = document.getElementById('light-val');
+      const colorBox = document.getElementById('color-box');
+
+      let currentPixelBuffer = null;
+
+      function rgbToHsl(r, g, b) {
+        r /= 255;
+        g /= 255;
+        b /= 255;
+        const max = Math.max(r, g, b);
+        const min = Math.min(r, g, b);
+        let h,
+          s,
+          l = (max + min) / 2;
+
+        if (max === min) {
+          h = s = 0;
+        } else {
+          const d = max - min;
+          s = l > 0.5 ? d / (2 - max - min) : d / (max + min);
+          switch (max) {
+            case r:
+              h = (g - b) / d + (g < b ? 6 : 0);
+              break;
+            case g:
+              h = (b - r) / d + 2;
+              break;
+            case b:
+              h = (r - g) / d + 4;
+              break;
+          }
+          h /= 6;
+        }
+
+        return [h * 360, s * 255, l * 255];
+      }
+
+      function foobar(rgbaBuffer, satPower, lightPower) {
+        const numBins = 36;
+        const bins = Array.from({ length: numBins }, () => ({
+          totalWeight: 0,
+          sumR: 0,
+          sumG: 0,
+          sumB: 0,
+        }));
+
+        for (let i = 0; i < rgbaBuffer.length; i += 4) {
+          const r = rgbaBuffer[i];
+          const g = rgbaBuffer[i + 1];
+          const b = rgbaBuffer[i + 2];
+          const a = rgbaBuffer[i + 3];
+
+          if (a < 5) continue;
+
+          const [h, s, l] = rgbToHsl(r, g, b);
+
+          if (s === 0) continue;
+
+          const sNorm = s / 255.0;
+          const wS = Math.pow(sNorm, satPower);
+
+          const dist = Math.abs(l - 128.0) / 128.0;
+          const lNorm = 1.0 - dist;
+          const wL = Math.pow(lNorm, lightPower);
+
+          const weight = wS * wL;
+
+          if (weight < 0.05) continue;
+
+          const binIndex = Math.floor(h / 10) % numBins;
+
+          bins[binIndex].totalWeight += weight;
+          bins[binIndex].sumR += r * weight;
+          bins[binIndex].sumG += g * weight;
+          bins[binIndex].sumB += b * weight;
+        }
+
+        let maxBinIndex = -1;
+        let maxWeight = 0;
+
+        for (let i = 0; i < numBins; i++) {
+          if (bins[i].totalWeight > maxWeight) {
+            maxWeight = bins[i].totalWeight;
+            maxBinIndex = i;
+          }
+        }
+
+        if (maxBinIndex === -1 || maxWeight <= 0) {
+          return `rgb(128, 128, 128)`;
+        }
+
+        const winningBin = bins[maxBinIndex];
+        const finalR = Math.round(winningBin.sumR / winningBin.totalWeight);
+        const finalG = Math.round(winningBin.sumG / winningBin.totalWeight);
+        const finalB = Math.round(winningBin.sumB / winningBin.totalWeight);
+
+        return `rgb(${finalR}, ${finalG}, ${finalB})`;
+      }
+
+      function updateColor() {
+        if (!currentPixelBuffer) return;
+
+        const satPower = parseFloat(satSlider.value);
+        const lightPower = parseFloat(lightSlider.value);
+
+        satValDisplay.textContent = satPower.toFixed(1);
+        lightValDisplay.textContent = lightPower.toFixed(1);
+
+        const color = foobar(currentPixelBuffer, satPower, lightPower);
+        colorBox.style.backgroundColor = color;
+      }
+
+      imageUpload.addEventListener('change', function (e) {
+        const file = e.target.files[0];
+        if (!file) return;
+
+        const reader = new FileReader();
+        reader.onload = function (event) {
+          const img = new Image();
+          img.onload = function () {
+            imagePreview.src = event.target.result;
+            imagePreview.style.display = 'block';
+
+            hiddenCanvas.width = img.width;
+            hiddenCanvas.height = img.height;
+            ctx.drawImage(img, 0, 0);
+
+            const imageData = ctx.getImageData(0, 0, img.width, img.height);
+            currentPixelBuffer = imageData.data;
+
+            updateColor();
+          };
+          img.src = event.target.result;
+        };
+        reader.readAsDataURL(file);
+      });
+
+      satSlider.addEventListener('input', updateColor);
+      lightSlider.addEventListener('input', updateColor);
+    </script>
+  </body>
+</html>