fix: 🐛 修复textarea统计多码元字符长度错误的问题 (#940)

✅ Closes: #933

Author: RJQingHuan

src/uni_modules/wot-design-uni/components/wd-textarea/wd-textarea.vue

@@ -177,7 +177,11 @@ const isRequired = computed(() => {
 
 // 当前文本域文字长度
 const currentLength = computed(() => {
-  return String(formatValue(props.modelValue) || '').length
+  /**
+   * 使用Array.from处理多码元字符以获取正确的长度
+   * @link https://github.com/Moonofweisheng/wot-design-uni/issues/933
+   */
+  return Array.from(String(formatValue(props.modelValue) || '')).length
 })
 
 const rootClass = computed(() => {