feat: enhance web engine view with profile isolation and add cache clearing functionality

src/webdrop_bridge/ui/main_window.py

@@ -394,8 +394,10 @@ class MainWindow(QMainWindow):
         else:
             logger.warning(f"Window icon not found at {icon_path}")
 
-        # Create web engine view
-        self.web_view = RestrictedWebEngineView(config.allowed_urls)
+        # Create web engine view with URL for profile isolation
+        self.web_view = RestrictedWebEngineView(
+            allowed_urls=config.allowed_urls, webapp_url=config.webapp_url
+        )
 
         # Enable the main window and web view to receive drag events
         self.setAcceptDrops(True)
@@ -1249,6 +1251,11 @@ class MainWindow(QMainWindow):
         check_updates_action.setToolTip("Check for Updates")
         check_updates_action.triggered.connect(self._on_manual_check_for_updates)
 
+        # Clear cache button on the right
+        clear_cache_action = toolbar.addAction("🗑️")
+        clear_cache_action.setToolTip("Clear Cache and Cookies")
+        clear_cache_action.triggered.connect(self._clear_cache_and_cookies)
+
         # Log file button on the right
         log_action = toolbar.addAction("📋")
         log_action.setToolTip("Open Log File")
@@ -1321,6 +1328,34 @@ class MainWindow(QMainWindow):
         # Show the dialog
         self.checking_dialog.show()
 
+    def _clear_cache_and_cookies(self) -> None:
+        """Clear web view cache and cookies.
+
+        Useful for clearing authentication tokens or cached data from previous
+        sessions. Also disconnects and reconnects the page to ensure clean state.
+        """
+        logger.info("Clearing cache and cookies")
+        
+        try:
+            # Clear cache and cookies in the web view profile
+            self.web_view.clear_cache_and_cookies()
+            
+            # Show confirmation message
+            QMessageBox.information(
+                self,
+                "Cache Cleared",
+                "Browser cache and cookies have been cleared successfully.\n\n"
+                "You may need to reload the page or restart the application for changes to take effect.",
+            )
+            logger.info("Cache and cookies cleared successfully")
+        except Exception as e:
+            logger.error(f"Failed to clear cache and cookies: {e}")
+            QMessageBox.warning(
+                self,
+                "Error",
+                f"Failed to clear cache and cookies: {str(e)}",
+            )
+
     def _show_about_dialog(self) -> None:
         """Show About dialog with version and information."""
         from PySide6.QtWidgets import QMessageBox