[Crash] Add lifecycle breadcrumbs for unattributable native crashes (#7813)

* [Crash] Add lifecycle breadcrumbs for unattributable native crashes

Co-authored-by: sentry[bot] <39604003+sentry[bot]@users.noreply.github.com>

* Restore the native split host button on non-macOS styles

The merged quick-host control composed a QPushButton and a separate autoRaise arrow QToolButton, which Fusion draws as two adjacent controls. Version one of the quick-host branch used a single QToolButton with MenuButtonPopup, which every style draws as one native split button.

Use that split button on every style that can draw one, and keep the plain primary + settings button pair as the native macOS fallback.

* Enable hover zoom and the hover panel by default

Both hover triggers now default to Hover, with the existing 400 ms zoom delay and 200 ms panel delay. The Off trigger remains available for users who want the old behavior.

---------

Co-authored-by: Lukas Brübach <44814898+BruebachL@users.noreply.github.com>
Co-authored-by: sentry[bot] <39604003+sentry[bot]@users.noreply.github.com>

tests/crash_reporter_test.cpp

@@ -418,6 +418,16 @@ TEST(CrashReporterTest, BeginSessionEndSessionRoundTripReportsClean)
     reporter.endSession();
 }
 
+TEST(CrashReporterTest, AddBreadcrumbIsSafeWithoutInitAndWithNullArguments)
+{
+    // Breadcrumbs are emitted from GUI slots and QtConcurrent workers regardless of whether
+    // the SDK was initialised (empty DSN, Never consent, OFF builds); none of these may crash.
+    CrashReporter::addBreadcrumb("card_db", "card database snapshot swapped in");
+    CrashReporter::addBreadcrumb(nullptr, "message");
+    CrashReporter::addBreadcrumb("category", nullptr);
+    SUCCEED();
+}
+
 } // namespace
 
 int main(int argc, char **argv)

tests/settings/settings_defaults_test.cpp

@@ -686,8 +686,7 @@ TEST_F(SettingsDefaultsTest, CardsDisplay_ArrowDrawAnimation_Default)
 TEST_F(SettingsDefaultsTest, CardsDisplay_HoverPanelTrigger_Default)
 {
     CardsDisplaySettings s(settingsPath, nullptr);
-    // Off by default: the panel is opt-in on upgrade.
-    ASSERT_EQ(s.getHoverPanelTrigger(), CardsDisplaySettings::HoverPanelTriggerOff);
+    ASSERT_EQ(s.getHoverPanelTrigger(), CardsDisplaySettings::HoverPanelTriggerHover);
 }
 
 TEST_F(SettingsDefaultsTest, CardsDisplay_HoverPanelTrigger_SetAndGet)
@@ -702,8 +701,7 @@ TEST_F(SettingsDefaultsTest, CardsDisplay_HoverPanelTrigger_SetAndGet)
 TEST_F(SettingsDefaultsTest, CardsDisplay_HoverZoomTrigger_Default)
 {
     CardsDisplaySettings s(settingsPath, nullptr);
-    // Off by default: the smooth hover zoom is opt-in on upgrade.
-    ASSERT_EQ(s.getHoverZoomTrigger(), CardsDisplaySettings::HoverPanelTriggerOff);
+    ASSERT_EQ(s.getHoverZoomTrigger(), CardsDisplaySettings::HoverPanelTriggerHover);
 }
 
 TEST_F(SettingsDefaultsTest, CardsDisplay_HoverZoomTrigger_SetAndGet)