Improve mobile UI and add infinite scroll

cpone-dashboard/menu/arrival/query.go

@@ -270,6 +270,24 @@ func FilterArrivalRows(rows []ArrivalRow, search, dept string) []ArrivalRow {
 	return out
 }
 
+func PaginateArrivalRows(rows []ArrivalRow, page, pageSize int) ([]ArrivalRow, bool) {
+	if page < 1 {
+		page = 1
+	}
+	if pageSize < 1 {
+		pageSize = 30
+	}
+	start := (page - 1) * pageSize
+	if start >= len(rows) {
+		return []ArrivalRow{}, false
+	}
+	end := start + pageSize
+	if end > len(rows) {
+		end = len(rows)
+	}
+	return rows[start:end], end < len(rows)
+}
+
 func UniqueDepartments(rows []ArrivalRow) []string {
 	seen := map[string]struct{}{}
 	var out []string