Fix WiFi network selection in TUI prompt

TableSelectionScreen returns the selected network in Result._item,
but the check on line 136 only tested Result._data (always None
for single-select). This caused every selection to fall through
to the "No wifi networks found" error path.

Fixes #4564

archinstall/lib/network/wifi_handler.py

@@ -133,7 +133,7 @@ class WifiHandler(InstanceRunnable[bool]):
 
 		match result.type_:
 			case ResultType.Selection:
-				if not result.has_data():
+				if not result.has_value() and not result.has_data():
 					debug('No networks found')
 					await NotifyScreen(header=tr('No wifi networks found')).run()
 					tui.exit(Result.false())