fix(minerU): 修复 PDF 识别状态和Markdown 加载问题

- 在 getPDFDetailBbox 方法中添加 iframe 刷新和 Markdown 加载
- 完善 getMinerUStatus 方法，增加识别失败的错误提示
- 优化代码结构，提高可读性和维护性

src/components/RenderMinerU/index.vue

@@ -7,6 +7,7 @@
       <iframe
         v-if="isShowPdf"
         id="iframe"
+        ref="iframe"
         :src="`${iframeSrc}/pdfjs-dist/web/viewer.html?file=${encodeURIComponent(prdUrl)}`"
         class="miner-u el-card is-always-shadow ml20"
       ></iframe>
@@ -221,6 +222,9 @@ export default {
     getPDFDetailBbox() {
       minerUBbox({ documentId: this.documentId }).then(res => {
         this.bboxList = this.formatJson(JSON.parse(JSON.stringify(res.content.content)))
+        // this.$refs.iframe 重新刷新iframe
+        this.$refs.iframe.contentWindow.location.reload()
+        this.getPDFDetailMarkDown()
       })
     },
     changeTab() {
@@ -263,8 +267,6 @@ export default {
     getMinerUStatus() {
       this.finishedMiner = true
       minerUQuery({ id: this.documentId }).then(res => {
-        console.log(res)
-
         let mineruStatus = res.content.content.mineruStatus
         switch (mineruStatus) {
           case 0:
@@ -277,10 +279,13 @@ export default {
           case '1':
             this.finishedMiner = false
             this.getPDFDetailBbox()
-            this.getPDFDetailMarkDown()
             break
           default:
             this.finishedMiner = false
+            this.$message({
+              message: '识别失败',
+              type: 'error'
+            })
             break
         }
       })