test: cover useGrepSearch, showProcessOutput, sshAuthSockOverride settings (#1494)

Three settings were missing from the data-driven round-trip tables:
- isUseGrepSearch / setUseGrepSearch  → added to boolSettings (2 rows)
- isShowProcessOutput / setShowProcessOutput → added to boolSettings (2 rows)
- getSshAuthSockOverride / setSshAuthSockOverride → added to stringSettings
  and two addString rows (socket path + empty string)

Total: 102 → 113 passing test rows.

Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: nogeenharrie

tests/auto/settings/tst_settings.cpp

@@ -221,6 +221,10 @@ const BoolSetting boolSettings[] = {
     {"useAutoclearPanel", QtPassSettings::setUseAutoclearPanel,
      QtPassSettings::isUseAutoclearPanel},
     {"maximized", QtPassSettings::setMaximized, QtPassSettings::isMaximized},
+    {"useGrepSearch", QtPassSettings::setUseGrepSearch,
+     QtPassSettings::isUseGrepSearch},
+    {"showProcessOutput", QtPassSettings::setShowProcessOutput,
+     QtPassSettings::isShowProcessOutput},
 };
 } // namespace
 
@@ -307,6 +311,8 @@ const StringSetting stringSettings[] = {
     {"profile", QtPassSettings::setProfile, QtPassSettings::getProfile},
     {"passTemplate", QtPassSettings::setPassTemplate,
      QtPassSettings::getPassTemplate},
+    {"sshAuthSockOverride", QtPassSettings::setSshAuthSockOverride,
+     QtPassSettings::getSshAuthSockOverride},
 };
 } // namespace
 
@@ -366,6 +372,8 @@ void tst_settings::stringRoundTrip_data() {
   addString("profile", "personal");
   addString("passTemplate", "username: {username}\npassword: {password}");
   addString("passTemplate", "user: {username}\npass: {password}");
+  addString("sshAuthSockOverride", "/run/user/1000/gnupg/S.gpg-agent.ssh");
+  addString("sshAuthSockOverride", "");
 }
 
 void tst_settings::stringRoundTrip() {