fix(editor): 修复建议组件空项处理和粘贴功能优化

修复建议组件在空项时的处理逻辑，避免潜在错误。优化编辑器粘贴功能：
1. 处理空剪贴板数据时更安全
2. 添加纯文本粘贴支持
3. 简化图片节点更新逻辑

src/components/editor/TiptapEditor.vue

@@ -236,7 +236,8 @@ const editor = useEditor({
   },
   editorProps: {
     handlePaste: (view, event) => {
-      const items = (event.clipboardData || event.originalEvent.clipboardData).items
+      const clipboardData = event.clipboardData || event.originalEvent.clipboardData
+      const items = clipboardData.items
       for (const item of items) {
         if (item.type.indexOf('image') === 0) {
           event.preventDefault()
@@ -261,9 +262,7 @@ const editor = useEditor({
                 const pos = findImagePos(tempUrl)
                 if (pos !== -1) {
                   const { tr } = view.state
-                  view.dispatch(
-                    tr.setNodeMarkup(pos, null, { src: data.ori_url })
-                  )
+                  view.dispatch(tr.setNodeMarkup(pos, null, { src: data.ori_url }))
                 }
               } else {
                 window['$message'].error(message || '图片上传失败')
@@ -279,10 +278,20 @@ const editor = useEditor({
               URL.revokeObjectURL(tempUrl)
             })
 
-          return true
+          return true // Handled
         }
       }
-      return false
+
+      // If no image was handled, check for text and paste as plain text.
+      const text = clipboardData.getData('text/plain')
+      if (text) {
+        event.preventDefault()
+        const { state, dispatch } = view
+        dispatch(state.tr.insertText(text))
+        return true // Handled
+      }
+
+      return false // Fallback for other cases
     }
   }
 })

src/components/editor/suggestion.js

@@ -99,10 +99,14 @@ export default {
           this.onExit()
           return true
         }
+        if(!component?.props.items?.length){
+          return false
+        }
         return component.ref.onKeyDown(props)
       },
 
       onExit() {
+        console.log('component.element',component.element)
         component.element.remove()
         component.destroy()
       },