show reserve btn in space page

Signed-off-by: dom <githubaccount56556@proton.me>

lib/http/user.dart

@@ -571,4 +571,23 @@ abstract final class UserHttp {
       return Error(res.data['message']);
     }
   }
+
+  static Future<LoadingState<void>> spaceReserve({
+    required Object sid,
+    required bool isFollow,
+  }) async {
+    final res = await Request().post(
+      isFollow ? Api.spaceReserveCancel : Api.spaceReserve,
+      data: {
+        'sid': sid,
+        'csrf': Accounts.main.csrf,
+      },
+      options: Options(contentType: Headers.formUrlEncodedContentType),
+    );
+    if (res.data['code'] == 0) {
+      return const Success(null);
+    } else {
+      return Error(res.data['message']);
+    }
+  }
 }