fix: layout issue (progress bar not horizontally centralized) in qt6.4.5

src/designer/loading_indicator.ui

@@ -11,14 +11,8 @@
    </rect>
   </property>
   <layout class="QGridLayout" name="gridLayout">
-   <item row="1" column="0">
+   <item row="1" column="0" alignment="Qt::AlignmentFlag::AlignHCenter">
     <widget class="QProgressBar" name="progressBar">
-     <property name="maximumSize">
-      <size>
-       <width>500</width>
-       <height>16777215</height>
-      </size>
-     </property>
      <property name="value">
       <number>24</number>
      </property>

src/loading_indicator.cpp

@@ -1,14 +1,16 @@
 /*
  * @Author: Uyanide pywang0608@foxmail.com
  * @Date: 2025-08-07 00:32:25
- * @LastEditTime: 2025-08-07 21:14:09
+ * @LastEditTime: 2026-01-15 05:23:55
  * @Description: LoadingIndicator implementation.
  */
 #include "loading_indicator.h"
 
-LoadingIndicator::LoadingIndicator(QWidget* parent) : QWidget(parent),
+LoadingIndicator::LoadingIndicator(int barMinimumWidth, QWidget* parent)
+    : QWidget(parent),
       ui(new Ui::LoadingIndicator) {
     ui->setupUi(this);
+    ui->progressBar->setMinimumWidth(barMinimumWidth);
 }
 
 LoadingIndicator::~LoadingIndicator() {

src/loading_indicator.h

@@ -1,7 +1,7 @@
 /*
  * @Author: Uyanide pywang0608@foxmail.com
  * @Date: 2025-08-07 00:32:25
- * @LastEditTime: 2025-08-07 21:13:59
+ * @LastEditTime: 2026-01-15 05:24:14
  * @Description: A loading indicator widget with a progress bar.
  */
 #ifndef LOADING_INDICATOR_H
@@ -19,7 +19,7 @@ class LoadingIndicator : public QWidget {
     Q_OBJECT
 
   public:
-    explicit LoadingIndicator(QWidget* parent = nullptr);
+    explicit LoadingIndicator(int barMinimumWidth = 500, QWidget* parent = nullptr);
     ~LoadingIndicator();
 
     void setMaximum(int max) { ui->progressBar->setMaximum(max); }

src/main_window.cpp

@@ -1,7 +1,7 @@
 /*
  * @Author: Uyanide pywang0608@foxmail.com
  * @Date: 2025-08-05 00:37:58
- * @LastEditTime: 2026-01-15 02:01:19
+ * @LastEditTime: 2026-01-15 05:26:49
  * @Description: MainWindow implementation.
  */
 #include "main_window.h"
@@ -10,6 +10,7 @@
 #include <QKeyEvent>
 #include <QProcess>
 #include <QPushButton>
+#include <algorithm>
 #include <functional>
 
 #include "./ui_main_window.h"
@@ -50,7 +51,8 @@ void MainWindow::_setupUI() {
     m_carouselIndex = ui->stackedWidget->addWidget(m_carousel);
 
     // create loading indicator
-    m_loadingIndicator = new LoadingIndicator(this);
+    int barWidth       = m_config.getStyleConfig().windowWidth * 0.7;
+    m_loadingIndicator = new LoadingIndicator(barWidth, this);
     connect(m_carousel,
             &ImagesCarousel::loadingStarted,
             this,