refactor: Remove project rules

sources/Session/ErrorInfo.hpp

@@ -0,0 +1,61 @@
+// Copyright (C) 2024-2026 Petr Mironychev
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Additional attribution terms under GPLv3 §7(b) apply — see LICENSE
+
+#pragma once
+
+#include <QMetaType>
+#include <QString>
+
+#include <utility>
+
+namespace QodeAssist {
+
+enum class ErrorCategory {
+    Config,
+    Auth,
+    Network,
+    Provider,
+    Validation,
+    Tool,
+};
+
+struct ErrorInfo
+{
+    ErrorCategory category = ErrorCategory::Provider;
+    QString message;
+    QString providerDetail;
+
+    bool isEmpty() const noexcept { return message.isEmpty(); }
+};
+
+[[nodiscard]] inline ErrorInfo makeError(
+    ErrorCategory category, QString message, QString providerDetail = QString())
+{
+    return ErrorInfo{category, std::move(message), std::move(providerDetail)};
+}
+
+[[nodiscard]] inline ErrorCategory categorizeProviderError(const QString &raw)
+{
+    const QString text = raw.toLower();
+
+    const auto contains = [&text](const char *needle) {
+        return text.contains(QLatin1String(needle));
+    };
+
+    if (contains("401") || contains("403") || contains("unauthorized")
+        || contains("forbidden") || contains("api key") || contains("apikey")
+        || contains("authentication") || contains("invalid token"))
+        return ErrorCategory::Auth;
+
+    if (contains("timeout") || contains("timed out") || contains("connection")
+        || contains("could not resolve") || contains("unreachable")
+        || contains("network") || contains("ssl") || contains("refused"))
+        return ErrorCategory::Network;
+
+    return ErrorCategory::Provider;
+}
+
+} // namespace QodeAssist
+
+Q_DECLARE_METATYPE(QodeAssist::ErrorInfo)