feat: fix backend sql error;fix frontend i18n display error

frontend/src/views/Home.vue

@@ -168,6 +168,7 @@ const fetchMessages = async () => {
     ElMessage.warning(t('home.alerts.enterEmail'));
     return;
   }
+  ElMessage.info(t('home.alerts.checkInboxStart'));
   loading.value = true;
   selectedMessage.value = null;
   attachments.value = [];
@@ -326,60 +327,39 @@ const generateRandomEmail = () => {
   } else {
     prefix = `${word1}${separator}${word2}${number}`;
   }
-  
+  ElMessage.success(t('home.alerts.generateRandomSuccess'));
   recipient.value = `${prefix}@${domain}`;
 };
 
-const copyEmail = () => {
+const copyEmail = async () => {
   if (!recipient.value) return;
 
-  const textToCopy = recipient.value;
-
-  if (navigator.clipboard && window.isSecureContext) {
-    navigator.clipboard.writeText(textToCopy).then(() => {
-      showCopySuccess();
-    }).catch(err => {
-      console.error('Modern copy failed: ', err);
-      fallbackCopy(textToCopy);
-    });
-  } else {
-    fallbackCopy(textToCopy);
-  }
-};
-
-const fallbackCopy = (text) => {
-  const textArea = document.createElement('textarea');
-  textArea.value = text;
-  
-  textArea.style.position = 'fixed';
-  textArea.style.top = '-9999px';
-  textArea.style.left = '-9999px';
-
-  document.body.appendChild(textArea);
-  textArea.focus();
-  textArea.select();
-
   try {
-    const successful = document.execCommand('copy');
-    if (successful) {
-      showCopySuccess();
+    if (navigator.clipboard && window.isSecureContext) {
+      await navigator.clipboard.writeText(recipient.value);
     } else {
-      throw new Error('Fallback copy was unsuccessful');
+      // fallback 方案
+      const textArea = document.createElement('textarea');
+      textArea.value = recipient.value;
+      textArea.style.position = 'fixed'; // 防止滚动时跳动
+      textArea.style.left = '-9999px';
+      textArea.style.top = '-9999px';
+      document.body.appendChild(textArea);
+      textArea.focus();
+      textArea.select();
+      const success = document.execCommand('copy');
+      document.body.removeChild(textArea);
+      if (!success) throw new Error('Fallback copy failed');
     }
+    copyStatus.value = 'copied';
+    ElMessage.success(t('home.alerts.copySuccess'));
+    setTimeout(() => copyStatus.value = 'idle', 2000);
   } catch (err) {
-    console.error('Fallback copy failed: ', err);
+    console.error('Copy failed:', err);
     ElMessage.error(t('home.alerts.copyFailed'));
   }
-
-  document.body.removeChild(textArea);
 };
 
-const showCopySuccess = () => {
-  copyStatus.value = 'copied';
-  setTimeout(() => {
-    copyStatus.value = 'idle';
-  }, 2000);
-};
 </script>
 
 <style scoped>