add filter by network for legs, add full export for traction

lib/services/api_service.dart

@@ -119,6 +119,45 @@ class ApiService {
     return _processResponse(response);
   }
 
+  Future<ApiBinaryResponse> postBytes(
+    String endpoint,
+    dynamic data, {
+    Map<String, String>? headers,
+    bool includeAuth = true,
+    bool allowRetry = true,
+  }) async {
+    final hasBody = data != null;
+    final response = await _sendWithRetry(
+      () => _client.post(
+        Uri.parse('$baseUrl$endpoint'),
+        headers: _buildHeaders(
+          hasBody ? _jsonHeaders(headers) : headers,
+          includeAuth: includeAuth,
+        ),
+        body: hasBody ? jsonEncode(data) : null,
+      ),
+      allowRetry: allowRetry,
+    );
+
+    if (response.statusCode >= 200 && response.statusCode < 300) {
+      final contentDisposition = response.headers['content-disposition'];
+      return ApiBinaryResponse(
+        bytes: response.bodyBytes,
+        statusCode: response.statusCode,
+        contentType: response.headers['content-type'],
+        filename: _extractFilename(contentDisposition),
+      );
+    }
+
+    final body = _decodeBody(response);
+    final message = _extractErrorMessage(body);
+    throw ApiException(
+      statusCode: response.statusCode,
+      message: message,
+      body: body,
+    );
+  }
+
   Future<dynamic> postMultipartFile(
     String endpoint, {
     required List<int> bytes,