Reduce GUI element sizes for better layout

- Reduce title font size from 24pt to 18pt for more compact header
- Reduce copy progress text area height from 100px to 60px
- Maintains readability while improving overall GUI layout proportions
- Better space utilization in the fullscreen interface

This improves the visual balance of the AutoInstaller GUI by making
the title and copy progress area more appropriately sized.

autoinstaller_gui/autoinstallergui.py

@@ -1028,7 +1028,7 @@ class AutoInstallerGUI(QMainWindow):
         # Header
         header = QLabel("MBetter Offline Automatic Installer")
         header.setAlignment(Qt.AlignmentFlag.AlignCenter)
-        header.setFont(QFont("Arial", 24, QFont.Weight.Bold))
+        header.setFont(QFont("Arial", 18, QFont.Weight.Bold))
         layout.addWidget(header)
 
         # Main configuration row - Network, Disk, Timezone side by side
@@ -1122,7 +1122,7 @@ class AutoInstallerGUI(QMainWindow):
         copy_layout = QVBoxLayout(copy_group)
         self.copy_progress_text = QTextEdit()
         self.copy_progress_text.setReadOnly(True)
-        self.copy_progress_text.setMaximumHeight(100)
+        self.copy_progress_text.setMaximumHeight(60)
         self.copy_progress_text.setFont(QFont("Monospace", 8))
         copy_layout.addWidget(self.copy_progress_text)
         layout.addWidget(copy_group)