year & month replaced by yearMonth object

app/ui/AddLocationButton.tsx

@@ -1,16 +1,16 @@
 import { PlusCircleIcon } from "@heroicons/react/24/outline";
+import { YearMonth } from "../lib/db-types";
+import { formatYearMonth } from "../lib/format";
 
 
 export interface AddLocationButtonProps {
-    /** year at which the new billing location should be addes */
-    year: number
-    /** month at which the new billing location should be addes */
-    month: number
+    /** year and month at which the new billing location should be addes */
+    yearMonth: YearMonth
 }
 
-export const AddLocationButton:React.FC<AddLocationButtonProps> = ({year,month}) =>
+export const AddLocationButton:React.FC<AddLocationButtonProps> = ({yearMonth}) =>
 <div className="card card-compact card-bordered max-w-[36em] bg-base-100 shadow-s my-1">
-    <a href={`/location/${year}-${month<10?"0":""}${month}/add`} className="card-body tooltip self-center" data-tip="Add a new billing location">
+    <a href={`/location/${ formatYearMonth(yearMonth) }/add`} className="card-body tooltip self-center" data-tip="Add a new billing location">
         <span className='grid self-center' data-tip="Add a new billing location">
             <PlusCircleIcon className="h-[1em] w-[1em] cursor-pointer text-4xl" />
         </span>