fix: specify search paths to avoid the pinentry notice on macOS

Author: saturneric

src/core/utils/GpgUtils.cpp

@@ -462,10 +462,13 @@ auto GPGFRONTEND_CORE_EXPORT DecidePinentry() -> QString {
   QStringList preferred_list = {"pinentry-gnome3",
                                 "pinentry-qt"
                                 "pinentry-gtk2"};
+  QStringList search_paths = {"/bin", "/usr/bin", "/usr/local/bin"}
 #elif defined(__APPLE__) && defined(__MACH__)
   QStringList preferred_list = {"pinentry-mac", "pinentry-qt"};
+  QStringList search_paths = {"/opt/homebrew/bin", "/usr/local/bin"};
 #else
   QStringList preferred_list = {"pinentry-qt"};
+  QStringList search_paths = {};
 #endif
 
   if (IsFlatpakENV()) {
@@ -480,6 +483,15 @@ auto GPGFRONTEND_CORE_EXPORT DecidePinentry() -> QString {
     }
   }
 
+  if (search_paths.isEmpty()) return {};
+
+  for (const QString& name : preferred_list) {
+    QString path = QStandardPaths::findExecutable(name, search_paths);
+    if (!path.isEmpty()) {
+      return path;
+    }
+  }
+
   return {};
 }
 }  // namespace GpgFrontend