feat(backend):数据源form描述非必填；i18n fix

frontend/src/lang/zh.js

@@ -807,7 +807,10 @@ export default {
     validate_success: '校验成功',
     validate: '校验',
     search_by_name: '根据名称搜索',
-    delete_warning: '确定要删除吗?'
+    delete_warning: '确定要删除吗?',
+    input_name: '请输入名称',
+    input_limit_2_25: '2-25字符',
+    input_limit_0_50: '0-50字符'
   },
   panel: {
     copy_link_passwd: '复制链接及密码',

frontend/src/views/system/datasource/form.vue

@@ -55,9 +55,8 @@ export default {
       form: { configuration: {}},
       rule: {
         name: [{ required: true, message: this.$t('datasource.input_name'), trigger: 'blur' },
-          { min: 2, max: 25, message: this.$t('commons.input_limit', [2, 25]), trigger: 'blur' }],
-        desc: [{ required: true, message: this.$t('datasource.input_desc'), trigger: 'blur' },
-          { min: 2, max: 50, message: this.$t('commons.input_limit', [2, 50]), trigger: 'blur' }],
+          { min: 2, max: 25, message: this.$t('datasource.input_limit_2_25', [2, 25]), trigger: 'blur' }],
+        desc: [{ min: 0, max: 50, message: this.$t('datasource.input_limit_0_50'), trigger: 'blur' }],
         type: [{ required: true, message: this.$t('datasource.please_choose_type'), trigger: 'change' }],
 
         'configuration.dataBase': [{ required: true, message: this.$t('datasource.please_input_data_base'), trigger: 'blur' }],