add opening files

src/widgets/file_tabs.py

@@ -88,7 +88,7 @@ class FileTabs(TabbedContent):
                     await self.remove_pane(self.active)
                 
                 for tab in self.query(TabPane):
-                    if isinstance(self.active_pane, HomeTab):
+                    if isinstance(tab, HomeTab):
                         continue
                     
                     if tab.path == new_path:
@@ -154,6 +154,14 @@ class FileTabs(TabbedContent):
             
         file_tab.saved = True
     
+    async def open_file_dialog(self):
+        async def callback(path: str | None):
+            if path == None:
+                return
+            await self.open_file(path)
+            
+        await self.app.push_screen(FileOpen(), callback=callback)
+    
     async def open_home(self) -> None:
         await self.add_pane(HomeTab())