feat(knowledge): 实现知识库文件上传自定义功能

- 新增 datasetsExPages 和 uploadFileByCustom 接口
- 实现文件上传功能，支持自定义文件和通用知识文件模板
- 添加预处理结果预览功能
- 优化文件上传组件，支持拖拽上传和进度显示

src/views/knowledge/detail/create.vue

@@ -12,7 +12,7 @@
         </el-steps>
 
         <div class="components">
-          <step-preprocessing v-if="active === 0" @getForm="getForm"></step-preprocessing>
+          <step-preprocessing v-if="active === 0" @getForm="getForm" @getDocumentId="getDocumentId"></step-preprocessing>
           <split-config v-if="active === 1"></split-config>
           <words v-if="active === 2"></words>
         </div>
@@ -27,9 +27,10 @@
       </div>
     </el-card>
 
-    <el-drawer :visible.sync="visible" size="80%" title="预处理结果预览">
+    <!-- 添加预处理结果预览对话框 -->
+    <el-drawer :visible.sync="visible" size="80%" title="预处理结果预览" :before-close="handleClose">
       <div style="height:calc(100% - 55px);">
-        <r-miner-u></r-miner-u>
+        <r-miner-u :documentId="documentId"></r-miner-u>
       </div>
     </el-drawer>
   </div>
@@ -44,7 +45,8 @@ export default {
   data() {
     return {
       visible: true,
-      active: 0
+      active: 0,
+      documentId: ''
     }
   },
   props: {},
@@ -57,7 +59,10 @@ export default {
   filters: {},
   methods: {
     getForm() {},
-    fetchApi() {}
+    fetchApi() {},
+    getDocumentId(id) {
+      this.documentId = id
+    }
   },
   created() {},
   mounted() {},