fix: build web (#9259)

1. Web, build.
2. Web and mobile, `onSubmitted` for ID text field.
3. Web, remove unused key 'toggle_option'.

Signed-off-by: fufesou <linlong1266@gmail.com>

flutter/lib/mobile/pages/connection_page.dart

@@ -249,6 +249,9 @@ class _ConnectionPageState extends State<ConnectionPage> {
                           ),
                         ),
                         inputFormatters: [IDTextInputFormatter()],
+                        onSubmitted: (_) {
+                          onConnect();
+                        },
                       );
                     },
                     onSelected: (option) {