add auth proto

protobuf/items.proto

@@ -27,3 +27,40 @@ enum Source {
 }
 
 message PersonList { repeated Person person = 1; }
+// Authentication messages
+message LoginRequest {
+  string username = 1;
+  string password = 2;
+}
+
+message LoginResponse {
+  string token = 1;
+  bool success = 2;
+  string message = 3;
+}
+
+message LogoutRequest {
+  string token = 1;
+}
+
+message LogoutResponse {
+  bool success = 1;
+  string message = 2;
+}
+
+message AuthStatusRequest {
+  string token = 1;
+}
+
+message AuthStatusResponse {
+  bool authenticated = 1;
+  string username = 2;
+  string message = 3;
+}
+
+// Authentication service
+service AuthService {
+  rpc Login (LoginRequest) returns (LoginResponse);
+  rpc Logout (LogoutRequest) returns (LogoutResponse);
+  rpc GetAuthStatus (AuthStatusRequest) returns (AuthStatusResponse);
+}