Fix LightSwitch crash: catch all exceptions in update_sun_times and guard add_property against missing properties key

Agent-Logs-Url: https://github.com/microsoft/PowerToys/sessions/8940919c-1eef-4a10-9abc-a0defbc156d8

Co-authored-by: MuyuanMS <116717757+MuyuanMS@users.noreply.github.com>

Author: Copilot

src/common/SettingsAPI/settings_objects.h

@@ -78,6 +78,10 @@ namespace PowerToysSettings
         {
             json::JsonObject prop_value;
             prop_value.SetNamedValue(L"value", json::value(value));
+            if (!m_json.HasKey(L"properties"))
+            {
+                m_json.SetNamedValue(L"properties", json::JsonObject{});
+            }
             m_json.GetNamedObject(L"properties").SetNamedValue(name, prop_value);
         }
 

src/modules/LightSwitch/LightSwitchService/LightSwitchStateManager.cpp

@@ -143,11 +143,9 @@ static std::pair<int, int> update_sun_times(auto& settings)
 
         Logger::info(L"[LightSwitchService] Updated sun times and saved to config.");
     }
-    catch (const std::exception& e)
+    catch (...)
     {
-        std::string msg = e.what();
-        std::wstring wmsg(msg.begin(), msg.end());
-        Logger::error(L"[LightSwitchService] Exception during sun time update: {}", wmsg);
+        Logger::error(L"[LightSwitchService] Exception during sun time update.");
     }
 
     return { newLightTime, newDarkTime };