Update order of imports and improve error handling in various modules

ren_browser/tabs/tabs.py

@@ -24,8 +24,8 @@ class TabsManager:
     def _add_tab_internal(self, title: str, content: ft.Control):
         idx = len(self.manager.tabs)
         url_field = ft.TextField(
-            value=title, 
-            expand=True, 
+            value=title,
+            expand=True,
             text_style=ft.TextStyle(size=12),
             content_padding=ft.padding.only(top=8, bottom=8, left=8, right=8)
         )