feat: 审批通过按钮增加防重复点击，避免重复提示

src/views/settlement/pre-settlement.vue

@@ -334,6 +334,7 @@ export default {
       ArrowDown,
       ArrowUp,
       loading: false,
+      approveLoading: false,
       query: emptyQuery(),
       searchFields: preSettlementSearchFields,
       searchExpanded: false,
@@ -691,18 +692,23 @@ export default {
         });
     },
     async handleApprove(row) {
-      await this.$confirm('确认审批通过该预付结算单？', '提示', { type: 'warning' });
-      const loading = this.$loading({
-        lock: true,
-        text: '审批处理中，请稍候…',
-        background: 'rgba(255, 255, 255, 0.6)',
-      });
+      // 防止重复点击：请求进行中忽略后续点击，避免重复审批和重复提示
+      if (this.approveLoading) return;
+      this.approveLoading = true;
+      let loading = null;
       try {
+        await this.$confirm('确认审批通过该预付结算单？', '提示', { type: 'warning' });
+        loading = this.$loading({
+          lock: true,
+          text: '审批处理中，请稍候…',
+          background: 'rgba(255, 255, 255, 0.6)',
+        });
         await approve({ id: row.id });
         this.$message.success('审批通过');
         this.loadTable();
       } finally {
-        loading.close();
+        loading?.close();
+        this.approveLoading = false;
       }
     },
     async handleReturn(row) {