fix: parse YYYY-MM month filter correctly in attendance history

The frontend sends month as "YYYY-MM" but the route handler was passing
it through Number() which parsed only the year portion, causing the
service to ignore the month filter entirely.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

package.json

@@ -1,6 +1,6 @@
 {
   "name": "app-ts",
-  "version": "1.5.8",
+  "version": "1.5.9",
   "description": "",
   "main": "dist/server.js",
   "scripts": {

src/routes/admin/attendance.ts

@@ -220,8 +220,14 @@ export default async function attendanceRoutes(
       userId,
       isAdmin,
       authUserId: authData.userId,
-      month: query.month ? Number(query.month) : undefined,
+      month: query.month
-      year: query.year ? Number(query.year) : undefined,
+        ? Number(String(query.month).split("-")[1])
+        : undefined,
+      year: query.month
+        ? Number(String(query.month).split("-")[0])
+        : query.year
+          ? Number(query.year)
+          : undefined,
     });
 
     return reply.send({