fix: 支持自定义s3协议region name和signature version，解决cloudflare r2文件取回问题

fcb-fronted/src/views/Admin/SettingView.vue

@@ -49,6 +49,12 @@
       </el-form-item>
 	  <el-form-item size="large" label="S3 hostname">
         <el-input v-model="config.s3_hostname" />
+      </el-form-item>
+	  <el-form-item size="large" label="S3 region name">
+        <el-input v-model="config.s3_region_name" />
+      </el-form-item>
+	  <el-form-item size="large" label="S3 Signature Version">
+        <el-input v-model="config.s3_signature_version" />
       </el-form-item>
       <el-form-item size="large" label="Aws Session Token">
         <el-input v-model="config.aws_session_token" />
@@ -105,6 +111,8 @@ const config = ref({
   background: '',
   s3_secret_access_key: '',
   aws_session_token: '',
+  s3_signature_version: '',
+  s3_region_name: '',
   s3_bucket_name: '',
   s3_endpoint_url: '',
   s3_hostname: '',