Refactor code structure for improved readability and maintainability

src/webdrop_bridge/ui/main_window.py

@@ -250,6 +250,12 @@ class OpenDropZone(QWidget):
         self.setMinimumSize(QSize(44, 44))
         self.setMaximumSize(QSize(48, 48))
 
+    def set_icon(self, icon: QIcon) -> None:
+        """Set the displayed icon for the drop zone widget."""
+        if icon.isNull():
+            return
+        self._icon_label.setPixmap(icon.pixmap(QSize(32, 32)))
+
     # ------------------------------------------------------------------
     # Drop handling
     # ------------------------------------------------------------------
@@ -1263,19 +1269,34 @@ class MainWindow(QMainWindow):
         # Separator
         toolbar.addSeparator()
 
+        if hasattr(sys, "_MEIPASS"):
+            icons_dir = Path(sys._MEIPASS) / "resources" / "icons"  # type: ignore[attr-defined]
+        else:
+            icons_dir = Path(__file__).parent.parent.parent.parent / "resources" / "icons"
+
         # Home button
-        home_action = toolbar.addAction(
+        home_icon_path = icons_dir / "home.ico"
-            self.style().standardIcon(self.style().StandardPixmap.SP_DirHomeIcon), ""
+        home_icon = (
+            QIcon(str(home_icon_path))
+            if home_icon_path.exists()
+            else self.style().standardIcon(self.style().StandardPixmap.SP_DirHomeIcon)
         )
+        home_action = toolbar.addAction(home_icon, "")
         home_action.setToolTip("Home")
         home_action.triggered.connect(self._navigate_home)
 
         # Refresh button
         refresh_action = self.web_view.pageAction(self.web_view.page().WebAction.Reload)
+        reload_icon_path = icons_dir / "reload.ico"
+        if reload_icon_path.exists():
+            refresh_action.setIcon(QIcon(str(reload_icon_path)))
         toolbar.addAction(refresh_action)
 
         # Open-with-default-app drop zone (right of Reload)
         self._open_drop_zone = OpenDropZone()
+        open_icon_path = icons_dir / "open.ico"
+        if open_icon_path.exists():
+            self._open_drop_zone.set_icon(QIcon(str(open_icon_path)))
         self._open_drop_zone.file_opened.connect(self._on_file_opened_via_drop)
         self._open_drop_zone.file_open_failed.connect(self._on_file_open_failed_via_drop)
         open_drop_action = QWidgetAction(toolbar)