feat: settle course attendance automatically

apps/admin/src/pages/Attendance/attendance-workspace.ts

@@ -63,3 +63,22 @@ export function summarizeAttendance(records: readonly { status: string }[]): Att
   }
   return summary;
 }
+
+export interface LessonCheckinSummary {
+  total: number;
+  checkedIn: number;
+  notCheckedIn: number;
+}
+
+export function summarizeLessonCheckins(
+  records: readonly { status: string }[],
+): LessonCheckinSummary {
+  const checkedIn = records.filter(
+    (record) => record.status === 'present' || record.status === 'late',
+  ).length;
+  return {
+    total: records.length,
+    checkedIn,
+    notCheckedIn: records.length - checkedIn,
+  };
+}