fix(editor): 优化提及插入逻辑并修复光标位置问题

重构提及插入逻辑，使用更直接的方式删除@符号到光标间的内容
将普通空格替换为不间断空格以避免被HTML压缩
确保光标始终正确放置在插入内容之后

src/components/editor/CustomEditor.vue

@@ -174,6 +174,23 @@ const showMentionList = () => {
   selectedMentionIndex.value = 0
 }
 
+// 处理鼠标点击选择mention
+const handleMentionSelectByMouse = (member) => {
+  const selection = window.getSelection();
+  if (selection && selection.rangeCount > 0) {
+    insertMention(member, selection.getRangeAt(0).cloneRange());
+  } else {
+    // 如果没有有效的选区，尝试聚焦编辑器并获取选区
+    editorRef.value?.focus();
+    nextTick(() => {
+      const newSelection = window.getSelection();
+      if (newSelection && newSelection.rangeCount > 0) {
+        insertMention(member, newSelection.getRangeAt(0).cloneRange());
+      }
+    });
+  }
+};
+
 // 隐藏mention列表
 const hideMentionList = () => {
   showMention.value = false
@@ -193,66 +210,73 @@ const updateMentionPosition = (range) => {
 }
 
 // 插入mention
-const insertMention = (member) => {
+const insertMention = (member, clonedRange) => {
-  console.log('插入mention',member)
+  console.log('插入mention', member);
-  const selection = window.getSelection()
+  const selection = window.getSelection();
-  if (!selection.rangeCount) return
+  if (!clonedRange || !selection) return;
-  
+
-  const range = selection.getRangeAt(0)
+  const range = clonedRange; // 使用传入的克隆 range
-  const textNode = range.startContainer
+
-  const offset = range.startOffset
+  const textNode = range.startContainer;
-  
+  const offset = range.startOffset;
-  // 找到@符号的位置
+  const textContent = textNode.nodeType === Node.TEXT_NODE ? textNode.textContent || '' : '';
-  const textContent = textNode.textContent || ''
+  // @符号的查找逻辑仅当光标在文本节点内且不在开头时才有意义
-  const atIndex = textContent.lastIndexOf('@', offset - 1)
+  const atIndex = (textNode.nodeType === Node.TEXT_NODE && offset > 0) ? textContent.lastIndexOf('@', offset - 1) : -1;
-  
+
-  // 创建mention元素
+  const mentionSpan = document.createElement('span');
-  const mentionSpan = document.createElement('span')
+  mentionSpan.className = 'mention';
-  mentionSpan.className = 'mention'
+  mentionSpan.setAttribute('data-user-id', String(member.id));
-  mentionSpan.setAttribute('data-user-id',String(member.id))
+  mentionSpan.textContent = `@${member.value || member.nickname}`;
-  mentionSpan.textContent = `@${member.value || member.nickname}`
+  mentionSpan.contentEditable = 'false';
-  mentionSpan.contentEditable = 'false'
+
-  
+  if (atIndex !== -1 && textNode.nodeType === Node.TEXT_NODE) {
-  if (atIndex !== -1) {
+    const parent = textNode.parentNode;
-    // 如果找到@符号，替换文本
+    if (!parent) return; // Sanity check
-    const beforeText = textContent.substring(0, atIndex)
+
-    const afterText = textContent.substring(offset)
+    // 从@符号开始删除，直到当前光标位置
-    
+    range.setStart(textNode, atIndex);
-    // 创建新的文本节点
+    range.setEnd(textNode, offset);
-    const beforeNode = document.createTextNode(beforeText)
+    range.deleteContents();
-    const afterNode = document.createTextNode(' ' + afterText)
+
-    
+    // 插入 mention 元素
-    // 替换内容
+    range.insertNode(mentionSpan);
-    const parent = textNode.parentNode
-    parent.insertBefore(beforeNode, textNode)
-    parent.insertBefore(mentionSpan, textNode)
-    parent.insertBefore(afterNode, textNode)
-    parent.removeChild(textNode)
   } else {
-    // 如果没有找到@符号，直接在光标位置插入
+    // 如果没有找到@符号，或者光标不在合适的文本节点内，直接在当前光标位置插入
-    range.deleteContents()
+    if (!range.collapsed) {
-    
+      range.deleteContents();
-    // 插入@提及元素
+    }
-    range.insertNode(mentionSpan)
+    range.insertNode(mentionSpan);
-    
-    // 在@提及元素后添加空格
-    const spaceNode = document.createTextNode(' ')
-    range.setStartAfter(mentionSpan)
-    range.insertNode(spaceNode)
-    
-    // 将光标移动到空格后
-    range.setStartAfter(spaceNode)
-    range.collapse(true)
-    selection.removeAllRanges()
-    selection.addRange(range)
   }
-  
+
-  // 触发输入事件以更新编辑器内容
+  // 在 mention 之后插入一个空格，并将光标移到空格之后
-  handleInput({ target: editorRef.value })
+  const spaceNode = document.createTextNode('\u00A0'); // 使用不间断空格
-  
+  const currentParent = mentionSpan.parentNode;
-  // 隐藏mention列表
+  if (currentParent) {
-  hideMentionList()
+    // 将空格节点插入到 mentionSpan 之后
-}
+    if (mentionSpan.nextSibling) {
+      currentParent.insertBefore(spaceNode, mentionSpan.nextSibling);
+    } else {
+      currentParent.appendChild(spaceNode);
+    }
+    // 设置光标到空格之后
+    range.setStartAfter(spaceNode);
+    range.collapse(true);
+  } else {
+    // Fallback: 如果 mentionSpan 没有父节点（理论上不应该发生），则将光标设置在 mentionSpan 之后
+    range.setStartAfter(mentionSpan);
+    range.collapse(true);
+  }
+
+  selection.removeAllRanges();
+  selection.addRange(range);
+
+  editorRef.value?.focus(); // 确保编辑器在操作后仍有焦点
+
+  nextTick(() => {
+    handleInput({ target: editorRef.value });
+    hideMentionList();
+  });
+};
 
 // 处理粘贴事件
 const handlePaste = (event) => {
@@ -350,12 +374,15 @@ const handleKeydown = (event) => {
         break
       case 'Enter':
       case 'Tab':
-        event.preventDefault()
+        event.preventDefault();
-        const selectedMember = mentionList.value[selectedMentionIndex.value]
+        const selectedMember = mentionList.value[selectedMentionIndex.value];
         if (selectedMember) {
-          insertMention(selectedMember)
+          const selection = window.getSelection();
+          if (selection && selection.rangeCount > 0) {
+            insertMention(selectedMember, selection.getRangeAt(0).cloneRange());
+          }
         }
-        break
+        break;
       case 'Escape':
         hideMentionList()
         break
@@ -398,6 +425,25 @@ const handleKeydown = (event) => {
               }
               prevSibling = prevSibling.previousSibling
             }
+          } else {
+            // 如果光标在文本节点中间或末尾，且当前文本节点只包含空格
+            // 检查前一个兄弟节点是否是mention
+            if (!container.textContent.trim()) {
+              let prevSibling = container.previousSibling
+              while (prevSibling) {
+                if (prevSibling.nodeType === Node.ELEMENT_NODE && 
+                    prevSibling.classList && 
+                    prevSibling.classList.contains('mention')) {
+                  targetMention = prevSibling
+                  break
+                }
+                // 如果是文本节点且不为空，停止查找
+                if (prevSibling.nodeType === Node.TEXT_NODE && prevSibling.textContent.trim()) {
+                  break
+                }
+                prevSibling = prevSibling.previousSibling
+              }
+            }
           }
         } else if (container.nodeType === Node.ELEMENT_NODE) {
           // 如果光标在元素节点中，检查前一个子节点
@@ -930,27 +976,44 @@ const insertImageEmoji = (imgSrc, altText) => {
 }
 
 // 事件监听
-const onSubscribeMention = (data) => {
+const onSubscribeMention = async (data) => {
-  // 确保编辑器获得焦点
+  const editorNode = editorRef.value;
-  editorRef.value?.focus()
+  if (!editorNode) return;
-  
+
-  // 如果编辑器为空或者光标不在编辑器内，将光标移动到编辑器末尾
+  editorNode.focus();
-  const selection = window.getSelection()
+  await nextTick(); // 确保焦点已设置
-  if (!selection.rangeCount || !editorRef.value.contains(selection.anchorNode)) {
+
-    const range = document.createRange()
+  let selection = window.getSelection();
-    if (editorRef.value.lastChild) {
+  if (!selection || selection.rangeCount === 0) {
-      range.setStartAfter(editorRef.value.lastChild)
+    const range = document.createRange();
+    if (editorNode.lastChild) {
+      range.setStartAfter(editorNode.lastChild);
     } else {
-      range.setStart(editorRef.value, 0)
+      range.setStart(editorNode, 0);
     }
-    range.collapse(true)
+    range.collapse(true);
-    selection.removeAllRanges()
+    if (selection) selection.removeAllRanges();
-    selection.addRange(range)
+    selection?.addRange(range);
+    await nextTick(); 
+    selection = window.getSelection(); 
+  } else if (!editorNode.contains(selection.anchorNode)) {
+    const range = document.createRange();
+    if (editorNode.lastChild) {
+      range.setStartAfter(editorNode.lastChild);
+    } else {
+      range.setStart(editorNode, 0);
+    }
+    range.collapse(true);
+    selection.removeAllRanges();
+    selection.addRange(range);
+    await nextTick();
+    selection = window.getSelection();
   }
-  
+
-  // 插入@提及
+  if (selection && selection.rangeCount > 0) {
-  insertMention(data)
+    insertMention(data, selection.getRangeAt(0).cloneRange());
-}
+  }
+};
 
 const onSubscribeQuote = (data) => {
   // 保存引用数据，但不保存到草稿中
@@ -1443,7 +1506,7 @@ const handleEditorClick = (event) => {
             <n-icon size="18" class="icon" :component="nav.icon" />
             <p class="tip-title">{{ nav.title }}</p>
           </div>
-          <n-button class="w-80px h-30px ml-auto" type="primary">
+          <n-button class="w-80px h-30px ml-auto" type="primary" @click="sendMessage">
             <template #icon>
         <n-icon>
           <IosSend />
@@ -1495,7 +1558,7 @@ const handleEditorClick = (event) => {
               :key="member.user_id || member.id"
               class="cursor-pointer px-14px h-42px"
               :class="{ 'bg-#EEE9F9': index === selectedMentionIndex }"
-              @mousedown.prevent="insertMention(member)"
+              @mousedown.prevent="handleMentionSelectByMouse(member)"
               @mouseover="selectedMentionIndex = index"
             >
               <div class="flex items-center border-b-1px border-b-solid border-b-#F8F8F8 h-full">