fix: different cronexpr rules between ui and pocketbase

ui/src/utils/cron.ts

@@ -3,6 +3,8 @@
 export const validCronExpression = (expr: string): boolean => {
   try {
     parseExpression(expr);
+
+    if (expr.trim().split(" ").length !== 5) return false; // pocketbase 后端仅支持五段式的表达式
     return true;
   } catch {
     return false;
@@ -10,19 +12,15 @@ export const validCronExpression = (expr: string): boolean => {
 };
 
 export const getNextCronExecutions = (expr: string, times = 1): Date[] => {
-  if (!expr) return [];
+  if (!validCronExpression(expr)) return [];
 
-  try {
-    const now = new Date();
-    const cron = parseExpression(expr, { currentDate: now, iterator: true });
+  const now = new Date();
+  const cron = parseExpression(expr, { currentDate: now, iterator: true });
 
-    const result: Date[] = [];
-    for (let i = 0; i < times; i++) {
-      const next = cron.next();
-      result.push(next.value.toDate());
-    }
-    return result;
-  } catch {
-    return [];
+  const result: Date[] = [];
+  for (let i = 0; i < times; i++) {
+    const next = cron.next();
+    result.push(next.value.toDate());
   }
+  return result;
 };