refactor(qc): 移除页面顶部审批操作按钮，调整审批逻辑

1.  移除待审批状态下页面顶部的审批通过和驳回按钮
2.  重构审批相关的前端方法，删除冗余的handleApprove和handleReject
3.  优化后端审批日志逻辑，自动获取当前登录用户作为操作人
4.  新增评审单修改状态校验，仅草稿和已驳回状态可修改
5.  新增钢卷改判状态完整性校验，确保所有钢卷都已指定改判质量
6.  完善保存前的数据校验，新增产品名称非空校验和默认传审部门

klp-ui/src/views/mes/qc/qualityReview/index.vue

@@ -69,11 +69,7 @@
             <!-- 待提交：提交送审 -->
             <el-button v-if="currentRow.flowStatus === 1" size="mini" type="primary" plain icon="el-icon-s-promotion"
               @click="handleSubmit" v-hasPermi="['qc:qualityReview:submit']">提交送审</el-button>
-            <!-- 待审批：审批/驳回 -->
-            <el-button v-if="currentRow.flowStatus === 2" size="mini" type="success" plain icon="el-icon-check"
-              @click="handleApprove" v-hasPermi="['qc:qualityReview:approve']">审批通过</el-button>
-            <el-button v-if="currentRow.flowStatus === 2" size="mini" type="danger" plain icon="el-icon-close"
-              @click="handleReject" v-hasPermi="['qc:qualityReview:approve']">驳回</el-button>
+            <!-- 待审批：审批/驳回表单在下方展示，顶部不再重复放置操作按钮 -->
             <!-- 已通过：执行改判 -->
             <el-button v-if="currentRow.flowStatus === 3" size="mini" type="warning" plain icon="el-icon-setting"
               @click="handleExecute" v-hasPermi="['qc:qualityReview:execute']">执行改判</el-button>
@@ -541,20 +537,6 @@ export default {
     },
 
     // ===== 审批 =====
-    handleApprove() {
-      this.approveAction = 'approve'
-      this.approveForm = {
-        reviewId: this.currentRow.reviewId,
-        leaderOpinion: '',
-        leaderSign: ''
-      }
-      // 先构建完整对象再赋值
-      const map = {}
-      this.coilList.forEach(c => {
-        map[c.detailId] = c.regradeQuality || ''
-      })
-      this.approveCoilMap = map
-    },
     doApprove() {
       if (!this.approveForm.leaderOpinion) {
         this.$modal.msgError('请输入审批意见')
@@ -581,10 +563,6 @@ export default {
         })
       }).catch(() => {})
     },
-    handleReject() {
-      this.approveAction = 'reject'
-      this.rejectReason = ''
-    },
     doReject() {
       if (!this.rejectReason) {
         this.$modal.msgError('请输入驳回原因')