feat: 添加日期验证功能，确保发行日期不早于当前日期，申购截止日期不早于发行日期

src/locales/en-US.json

@@ -176,9 +176,11 @@
           "categoryRequired": "Type is required",
           "editionNameRequired": "Edition name is required",
           "launchDateRequired": "Launch date is required",
+          "launchDateNotPast": "Launch date cannot be earlier than current date",
           "perUserLimitRequired": "Per user limit is required",
           "totalSupplyRequired": "Total supply is required",
           "subscriptionDeadlineRequired": "Subscription deadline is required",
+          "deadlineAfterLaunch": "Subscription deadline cannot be earlier than launch date",
           "unitPriceRequired": "Unit price is required",
           "dividendRateRequired": "Dividend rate is required"
         },