weekend on call shifts

lib/screens/workforce/workforce_screen.dart

@@ -1529,6 +1529,18 @@ class _ScheduleGeneratorPanelState
       startMinute: 0,
       duration: const Duration(hours: 8),
     );
+    // Weekend Saturday on_call: 5PM (17:00) to 8AM (08:00) next day = 15 hours
+    templates['on_call_saturday'] = _ShiftTemplate(
+      startHour: 17,
+      startMinute: 0,
+      duration: const Duration(hours: 15),
+    );
+    // Weekend Sunday on_call: 5PM (17:00) to 7AM (07:00) next day = 14 hours
+    templates['on_call_sunday'] = _ShiftTemplate(
+      startHour: 17,
+      startMinute: 0,
+      duration: const Duration(hours: 14),
+    );
     // Default normal shift (8am-5pm = 9 hours)
     templates['normal'] = _ShiftTemplate(
       startHour: 8,
@@ -1684,14 +1696,7 @@ class _ScheduleGeneratorPanelState
       final pmUserId = itStaff.isEmpty
           ? null
           : itStaff[pmBaseIndex % itStaff.length].id;
-      final nextWeekPmUserId = itStaff.isEmpty
-          ? null
-          : itStaff[(pmBaseIndex + 1) % itStaff.length].id;
       final pmRelievers = _buildRelievers(pmBaseIndex, itStaff);
-      final nextWeekRelievers = itStaff.isEmpty
-          ? <String>[]
-          : _buildRelievers((pmBaseIndex + 1) % itStaff.length, itStaff);
-      var weekendNormalOffset = 0;
 
       for (
         var day = weekStart;
@@ -1706,32 +1711,53 @@ class _ScheduleGeneratorPanelState
         final dayIsRamadan = isApproximateRamadan(day);
 
         if (isWeekend) {
-          // Weekend: only IT Staff get normal + on_call (rotating)
-          if (itStaff.isNotEmpty) {
-            final normalIndex =
-                (amBaseIndex + pmBaseIndex + weekendNormalOffset) %
-                itStaff.length;
-            _tryAddDraft(
-              draft,
-              existing,
-              templates,
-              'normal',
-              itStaff[normalIndex].id,
-              day,
-              const [],
-            );
-            weekendNormalOffset += 1;
-          }
-          if (nextWeekPmUserId != null) {
-            _tryAddDraft(
-              draft,
-              existing,
-              templates,
-              'on_call',
-              nextWeekPmUserId,
-              day,
-              nextWeekRelievers,
-            );
+          final isSaturday = day.weekday == DateTime.saturday;
+          if (isSaturday) {
+            // Saturday: AM person gets normal shift, PM person gets weekend on_call
+            if (amUserId != null) {
+              _tryAddDraft(
+                draft,
+                existing,
+                templates,
+                'normal',
+                amUserId,
+                day,
+                const [],
+              );
+            }
+            if (pmUserId != null) {
+              _tryAddDraft(
+                draft,
+                existing,
+                templates,
+                'on_call_saturday',
+                pmUserId,
+                day,
+                pmRelievers,
+              );
+            }
+          } else {
+            // Sunday: PM person gets both normal and weekend on_call
+            if (pmUserId != null) {
+              _tryAddDraft(
+                draft,
+                existing,
+                templates,
+                'normal',
+                pmUserId,
+                day,
+                const [],
+              );
+              _tryAddDraft(
+                draft,
+                existing,
+                templates,
+                'on_call_sunday',
+                pmUserId,
+                day,
+                pmRelievers,
+              );
+            }
           }
         } else {
           // Weekday: IT Staff rotate AM/PM/on_call