合同管理功能中合同金额可以是0

src/views/modules/contract/info.vue

@@ -647,6 +647,9 @@ export default {
     },
     handleAmountInput(value) {
       let filtered = value.replace(/[^\d.]/g, '')
+      if (filtered.startsWith('.')) {
+        filtered = '0' + filtered
+      }
       let dotIndex = filtered.indexOf('.')
       if (dotIndex !== -1) {
         filtered = filtered.substring(0, dotIndex + 1) + filtered.substring(dotIndex + 1).replace(/\./g, '')