Fix UpdaterDialog::OnUpdateCompleted type conversion error

- Add complete UpdateResult enum definition to non-Windows forward declarations
- Unify method signatures to use proper enum type across all platforms
- Update stub implementations to use consistent enum type
- Resolves C2664 compilation error where MOC generated int instead of UpdateResult

src/citron/updater/updater_dialog.cpp

@@ -361,7 +361,16 @@ namespace Updater {
 struct UpdateInfo {};
 class UpdaterService {
 public:
-    enum class UpdateResult { Success };
+    enum class UpdateResult {
+        Success,
+        Failed,
+        Cancelled,
+        NetworkError,
+        ExtractionError,
+        PermissionError,
+        InvalidArchive,
+        NoUpdateAvailable
+    };
 };
 }
 
@@ -374,11 +383,7 @@ void UpdaterDialog::ShowUpdateChecking() {}
 void UpdaterDialog::OnUpdateCheckCompleted(bool, const Updater::UpdateInfo&) {}
 void UpdaterDialog::OnUpdateDownloadProgress(int, qint64, qint64) {}
 void UpdaterDialog::OnUpdateInstallProgress(int, const QString&) {}
-#ifdef _WIN32
 void UpdaterDialog::OnUpdateCompleted(Updater::UpdaterService::UpdateResult, const QString&) {}
-#else
-void UpdaterDialog::OnUpdateCompleted(int, const QString&) {}
-#endif
 void UpdaterDialog::OnUpdateError(const QString&) {}
 void UpdaterDialog::OnDownloadButtonClicked() {}
 void UpdaterDialog::OnCancelButtonClicked() {}
@@ -395,11 +400,7 @@ void UpdaterDialog::ShowErrorState() {}
 void UpdaterDialog::UpdateDownloadProgress(int, qint64, qint64) {}
 void UpdaterDialog::UpdateInstallProgress(int, const QString&) {}
 QString UpdaterDialog::FormatBytes(qint64) const { return QString(); }
-#ifdef _WIN32
 QString UpdaterDialog::GetUpdateMessage(Updater::UpdaterService::UpdateResult) const { return QString(); }
-#else
-QString UpdaterDialog::GetUpdateMessage(int) const { return QString(); }
-#endif
 
 #include "updater_dialog.moc"
 

src/citron/updater/updater_dialog.h

@@ -18,7 +18,19 @@
 // Forward declarations for non-Windows platforms
 namespace Updater {
 struct UpdateInfo;
-class UpdaterService;
+class UpdaterService {
+public:
+    enum class UpdateResult {
+        Success,
+        Failed,
+        Cancelled,
+        NetworkError,
+        ExtractionError,
+        PermissionError,
+        InvalidArchive,
+        NoUpdateAvailable
+    };
+};
 }
 #endif
 
@@ -46,11 +58,7 @@ private slots:
     void OnUpdateCheckCompleted(bool has_update, const Updater::UpdateInfo& update_info);
     void OnUpdateDownloadProgress(int percentage, qint64 bytes_received, qint64 bytes_total);
     void OnUpdateInstallProgress(int percentage, const QString& current_file);
-#ifdef _WIN32
     void OnUpdateCompleted(Updater::UpdaterService::UpdateResult result, const QString& message);
-#else
-    void OnUpdateCompleted(int result, const QString& message);
-#endif
     void OnUpdateError(const QString& error_message);
 
     void OnDownloadButtonClicked();
@@ -72,11 +80,7 @@ private:
     void UpdateInstallProgress(int percentage, const QString& current_file);
 
     QString FormatBytes(qint64 bytes) const;
-#ifdef _WIN32
     QString GetUpdateMessage(Updater::UpdaterService::UpdateResult result) const;
-#else
-    QString GetUpdateMessage(int result) const;
-#endif
 
 private:
 #ifdef _WIN32