[feat] add feedback dialog and diagnostic log export, refs #149

apps/desktop/src/gui/features/feedback/diagnostic_export.h

@@ -0,0 +1,32 @@
+/*
+ * @Author: DI JUNKUN
+ * @Date: 2026-11-11
+ * Copyright (c) 2026 by DI JUNKUN, All Rights Reserved.
+ */
+
+#ifndef _DIAGNOSTIC_EXPORT_H_
+#define _DIAGNOSTIC_EXPORT_H_
+
+#include <ctime>
+#include <filesystem>
+#include <string>
+
+namespace crossdesk::feedback {
+
+enum class ExportError { none, no_logs, read_failed, write_failed, too_large };
+struct ExportResult {
+  ExportError error = ExportError::none;
+};
+
+// Exports byte-for-byte snapshots of the active application and transport
+// logs, plus basic environment information. No account configuration is read.
+ExportResult ExportDiagnostics(const std::filesystem::path& application_logs,
+                               const std::filesystem::path& transport_logs,
+                               const std::filesystem::path& destination,
+                               const std::string& version,
+                               std::time_t now = std::time(nullptr));
+std::string DiagnosticFileName();
+
+}  // namespace crossdesk::feedback
+
+#endif