更新 ExpressionEditor 组件和语言文件：

1. 修改提示信息的键，确保使用统一的 messages 命名空间。
2. 在英文和中文语言文件中添加新的消息提示，增强用户体验。

Author: iwangbowen

src/components/ExpressionEditor.vue

@@ -117,13 +117,13 @@
       </div>
       <div class="preview-result">
         <template v-if="!displayExpression">
-          <div class="empty-tip">{{ t('editor.emptyTip') }}</div>
+          <div class="empty-tip">{{ t('editor.messages.emptyTip') }}</div>
         </template>
         <template v-else-if="!isFormulaComplete">
-          <div class="incomplete-tip">{{ t('editor.incompleteTip') }}</div>
+          <div class="incomplete-tip">{{ t('editor.messages.incompleteTip') }}</div>
         </template>
         <template v-else>
-          {{ t('editor.calculationResult') }}: <span class="result-value">{{ calculationResult }}</span>
+          {{ t('editor.messages.calculationResult') }}: <span class="result-value">{{ calculationResult }}</span>
         </template>
       </div>
     </div>
@@ -983,7 +983,7 @@ const validateExpression = () => {
   if (!displayExpression.value.trim()) {
     showValidationError.value = true;
     showValidationSuccess.value = false;
-    validationMessage.value = t('messages.emptyFormula');
+    validationMessage.value = t('editor.messages.emptyFormula');
     validationStatus.value = 'error';
 
     if (validationTimer) {
@@ -1005,17 +1005,17 @@ const validateExpression = () => {
     if (!result) {
       showValidationError.value = true;
       showValidationSuccess.value = false;
-      validationMessage.value = t('messages.validError');
+      validationMessage.value = t('editor.messages.validError');
       validationStatus.value = 'error';
     } else if (!isFormulaComplete.value) {
       showValidationError.value = true;
       showValidationSuccess.value = false;
-      validationMessage.value = t('editor.incompleteTip');
+      validationMessage.value = t('editor.messages.incompleteTip');
       validationStatus.value = 'error';
     } else {
       showValidationSuccess.value = true;
       showValidationError.value = false;
-      validationMessage.value = t('messages.validSuccess');
+      validationMessage.value = t('editor.messages.validSuccess');
       validationStatus.value = 'success';
     }
 
@@ -1032,7 +1032,7 @@ const validateExpression = () => {
   } catch (error) {
     showValidationError.value = true;
     showValidationSuccess.value = false;
-    validationMessage.value = t('messages.validError');
+    validationMessage.value = t('editor.messages.validError');
     validationStatus.value = 'error';
   }
 };

src/locales/en.ts

@@ -36,7 +36,15 @@ export default {
     pasteSuccess: 'Pasted successfully',
     pasteFailed: 'Paste failed',
     autoConvertVariables: 'Variables have been automatically converted',
-    invalidFormula: 'Invalid formula'
+    invalidFormula: 'Invalid formula',
+    messages: {
+      emptyFormula: 'Formula is empty',
+      validError: 'Expression validation failed',
+      validSuccess: 'Expression validation passed',
+      incompleteTip: 'Formula is incomplete',
+      emptyTip: 'Please enter an expression',
+      calculationResult: 'Result'
+    }
   },
   settings: {
     title: 'Editor Settings',

src/locales/zh.ts

@@ -36,7 +36,15 @@ export default {
     pasteSuccess: '粘贴成功',
     pasteFailed: '粘贴失败',
     autoConvertVariables: '变量已自动转换',
-    invalidFormula: '无效的公式'
+    invalidFormula: '无效的公式',
+    messages: {
+      emptyFormula: '公式为空',
+      validError: '公式验证失败',
+      validSuccess: '公式验证通过',
+      incompleteTip: '公式不完整',
+      emptyTip: '请输入公式',
+      calculationResult: '计算结果'
+    }
   },
   settings: {
     title: '编辑器设置',