Initial commit: 91dj android client dev_1.0.0

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

lib/tools_base/net/api_exception.dart

@@ -0,0 +1,12 @@
+/// future 扔出的异常
+class ApiException implements Exception {
+  int? code = -200;
+  dynamic message;
+  ApiException([this.code = -200, this.message]);
+
+  @override
+  String toString() {
+    if (message == null) return "ApiException:code:$code";
+    return "ApiException:code:$code message:$message";
+  }
+}