fix issues

server/public/index.html

@@ -745,7 +745,8 @@
         }
 
         function formatMonth(dateStr) {
-            const parts = dateStr.split('/');
+            const clean = dateStr.replace(/-/g, '/');
+            const parts = clean.split('/');
             if (parts.length >= 2) return `${parts[0]}年${parseInt(parts[1], 10)}月`;
             return dateStr.substring(0,7);
         }