fix: 移除自动评分选项的禁用条件，确保评分方式可用

src/modules/admin/lab/experiment/components/GradeRulesDialog.vue

@@ -382,7 +382,7 @@ onMounted(() => {
               <span class="rule-card__label">评分方式</span>
               <el-radio-group v-model="row.rule_mode" size="small">
                 <el-radio :label="1">人工评分</el-radio>
-                <el-radio :label="2" :disabled="row.type === 1 || row.type === 5 || row.type === 8">自动评分</el-radio>
+                <el-radio :label="2">自动评分</el-radio>
               </el-radio-group>
             </div>
             <div class="rule-card__row">