Use timezone-aware campaign start time (#438)

DT_Campaign_Fuel::date_of_campaign_day now uses DT_Time_Utilities::start_of_campaign_with_timezone($campaign['ID']) instead of reading $campaign['start_date']['timestamp'] directly. This makes campaign day calculations respect the campaign's timezone and avoids incorrect day offsets when the campaign timezone differs from the server timezone.

Author: micahmills

classes/dt-campaign-fuel.php

@@ -74,7 +74,7 @@ public static function total_days_in_campaign( $selected_campaign = null ): int
     public static function date_of_campaign_day( int $day ) {
         $porch_fields = DT_Porch_Settings::settings();
         $campaign = DT_Campaign_Landing_Settings::get_campaign();
-        $campaign_start_time = $campaign['start_date']['timestamp'];
+        $campaign_start_time = DT_Time_Utilities::start_of_campaign_with_timezone( $campaign['ID'] );
 
         $internal = DAY_IN_SECONDS;
         if ( $porch_fields['prayer_fuel_frequency']['value'] === 'weekly' ) {