feat(knowledge): 添加知识拆分预览功能

- 新增 SplitPreview 组件用于展示拆分预览结果
- 在 split 配置中集成预览功能，实现拆分和预览一体化
- 优化知识创建流程，支持预览确认后继续上传
-重构 API 调用，增加拆分结果预览接口

src/views/knowledge/detail/create.vue

@@ -13,7 +13,12 @@
 
         <div class="components">
           <step-preprocessing ref="stepPreProcessing" v-show="active === 0" @getForm="getForm" @getDocumentId="getDocumentId"></step-preprocessing>
-          <step-split-config ref="splitConfig" v-show="active === 1"></step-split-config>
+          <step-split-config
+            ref="splitConfig"
+            v-show="active === 1"
+            @previewConfirmed="handlePreviewConfirm"
+            @handleReUpload="handleReUpload"
+          ></step-split-config>
           <step-words ref="words" v-show="active === 2"></step-words>
         </div>
       </div>
@@ -81,7 +86,6 @@ export default {
     },
     async nextStep() {
       if (this.active === 0) {
-        // this.active++
         this.$refs.stepPreProcessing.uploadFiled()
       } else if (this.active === 1) {
         const res = await this.$refs.splitConfig.nextStep(this.documentId)
@@ -98,6 +102,14 @@ export default {
           this.$message.success('创建成功')
         }
       }
+    },
+    // 预览完成
+    handlePreviewConfirm() {
+      this.active = 2
+    },
+    // 重新上传
+    handleReUpload() {
+      this.active = 0
     }
   },
   created() {},