feat(file): 在文件预览界面添加评论功能

- 实现文件评论的前端展示界面，包括评论列表、输入框和交互功能
- 添加文件评论的API接口，支持查询和新增评论操作
- 设计并实现后端服务层、控制器、数据访问层等相关组件
- 集成评论功能到现有的文件预览页面，支持展开/收起评论区
- 实现评论数据的实时加载和提交功能，优化用户体验

klp-ui/src/api/system/fileComment.js

@@ -0,0 +1,18 @@
+import request from '@/utils/request'
+
+// 查询文件评论列表
+export function listFileComment(fileId) {
+  return request({
+    url: '/system/file/comment/list/' + fileId,
+    method: 'get'
+  })
+}
+
+// 新增文件评论
+export function addFileComment(data) {
+  return request({
+    url: '/system/file/comment',
+    method: 'post',
+    data: data
+  })
+}

klp-ui/src/views/system/file/all.vue

@@ -192,6 +192,36 @@
               <span>{{ selectedFile.createBy }}</span>
               <span>{{ parseTime(selectedFile.createTime) }}</span>
             </div>
+            <div class="preview-comment">
+              <div class="comment-bar" @click="commentExpanded = !commentExpanded">
+                <span><i class="el-icon-chat-dot-round"></i> 评论 ({{ comments.length }})</span>
+                <span class="comment-toggle">{{ commentExpanded ? '收起' : '展开' }} <i :class="commentExpanded ? 'el-icon-arrow-up' : 'el-icon-arrow-down'"></i></span>
+              </div>
+              <div v-show="commentExpanded" class="comment-body">
+                <div v-if="commentLoading" class="comment-hint"><i class="el-icon-loading"></i> 加载中...</div>
+                <div v-else-if="comments.length === 0" class="comment-hint comment-empty">暂无评论</div>
+                <div v-else class="comment-list">
+                  <div v-for="item in comments" :key="item.commentId" class="comment-item">
+                    <div class="comment-meta">
+                      <span class="comment-dept">{{ item.dept }}</span>
+                      <span class="comment-user">{{ item.createBy }}</span>
+                      <span class="comment-time">{{ parseTime(item.createTime) }}</span>
+                    </div>
+                    <div class="comment-text">{{ item.content }}</div>
+                  </div>
+                </div>
+                <div class="comment-input-area">
+                  <el-input
+                    v-model="commentInput"
+                    type="textarea"
+                    :rows="2"
+                    placeholder="输入评论..."
+                    resize="none"
+                  />
+                  <el-button type="primary" size="mini" @click="handleAddComment" :disabled="!commentInput.trim()" style="margin-top: 6px;">发送</el-button>
+                </div>
+              </div>
+            </div>
             <div class="preview-content">
               <ImagePreview v-if="fileTypeCategory === 'image'" :src="selectedFile.filePath" />
               <PdfPreview v-else-if="fileTypeCategory === 'pdf'" :src="selectedFile.filePath" />
@@ -298,6 +328,7 @@
 
 <script>
 import { listFile, getFile, addFile, updateFile, delFile, exportFile, listVisibleUser, addVisibleUser, delVisibleUser, listVisibleUserByFileId, listRelatedToMe, incrementView } from '@/api/system/file'
+import { listFileComment, addFileComment } from '@/api/system/fileComment'
 import { getToken } from '@/utils/auth'
 import UserSelect from '@/components/KLPService/UserSelect/index'
 import ImagePreview from '@/components/FilePreview/preview/image/index.vue'
@@ -397,6 +428,11 @@ export default {
       infoVisible: false,
       infoTitle: '',
       infoFile: null,
+      // 评论
+      comments: [],
+      commentExpanded: false,
+      commentInput: '',
+      commentLoading: false,
       // 拖拽调节宽度
       leftPanelWidth: '40%',
       isDragging: false,
@@ -422,6 +458,16 @@ export default {
   created() {
     this.getList()
   },
+  watch: {
+    selectedFile(val) {
+      if (val) {
+        this.loadComments()
+      } else {
+        this.comments = []
+        this.commentExpanded = false
+      }
+    }
+  },
   methods: {
     /** 切换tab */
     handleTabClick(tab) {
@@ -722,6 +768,25 @@ export default {
         window.open(row.filePath, '_blank')
       }
     },
+    /** 加载评论列表 */
+    loadComments() {
+      this.commentLoading = true
+      listFileComment(this.selectedFile.fileId).then(res => {
+        this.comments = res.data || []
+        this.commentLoading = false
+      }).catch(() => {
+        this.commentLoading = false
+      })
+    },
+    /** 发送评论 */
+    handleAddComment() {
+      const content = this.commentInput.trim()
+      if (!content) return
+      addFileComment({ fileId: this.selectedFile.fileId, content }).then(() => {
+        this.commentInput = ''
+        this.loadComments()
+      })
+    },
     /** 开始拖拽 */
     startResize(e) {
       this.isDragging = true
@@ -894,6 +959,88 @@ export default {
   color: #909399;
 }
 
+.preview-comment {
+  border-bottom: 1px solid #ebeef5;
+}
+
+.comment-bar {
+  padding: 8px 16px;
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  cursor: pointer;
+  font-size: 13px;
+  color: #606266;
+  user-select: none;
+}
+
+.comment-bar:hover {
+  background: #f5f7fa;
+}
+
+.comment-toggle {
+  color: #909399;
+  font-size: 12px;
+}
+
+.comment-body {
+  max-height: 260px;
+  overflow-y: auto;
+}
+
+.comment-hint {
+  padding: 16px;
+  text-align: center;
+  color: #909399;
+  font-size: 13px;
+}
+
+.comment-list {
+  padding: 4px 0;
+}
+
+.comment-item {
+  padding: 8px 16px;
+  border-bottom: 1px solid #f2f2f2;
+}
+
+.comment-item:last-child {
+  border-bottom: none;
+}
+
+.comment-meta {
+  display: flex;
+  gap: 8px;
+  align-items: center;
+  font-size: 12px;
+  margin-bottom: 4px;
+}
+
+.comment-dept {
+  color: #409eff;
+  font-weight: 500;
+}
+
+.comment-user {
+  color: #606266;
+}
+
+.comment-time {
+  color: #c0c4cc;
+}
+
+.comment-text {
+  font-size: 13px;
+  color: #303133;
+  line-height: 1.5;
+  word-break: break-all;
+}
+
+.comment-input-area {
+  padding: 8px 16px;
+  border-top: 1px solid #f2f2f2;
+}
+
 .preview-content {
   flex: 1;
   overflow: auto;