diff --git a/reading-platform-frontend/src/api/collections.ts b/reading-platform-frontend/src/api/collections.ts
index d4f213b..95a9be8 100644
--- a/reading-platform-frontend/src/api/collections.ts
+++ b/reading-platform-frontend/src/api/collections.ts
@@ -202,9 +202,21 @@ export function getCollectionStatusInfo(status: string) {
   return COLLECTION_STATUS_MAP[status] || { label: status, color: 'default' };
 }
 
-// 解析适用年级
-export function parseGradeLevels(gradeLevels: string | string[]): string[] {
-  if (Array.isArray(gradeLevels)) return gradeLevels;
+// 解析适用年级（统一处理列表展示与创建时的格式）
+export function parseGradeLevels(gradeLevels: string | string[] | undefined): string[] {
+  if (!gradeLevels) return [];
+  if (Array.isArray(gradeLevels)) {
+    if (gradeLevels.length === 0) return [];
+    // 兼容后端错误格式：["[\"小班\"", " \"中班\""] -> 拼接后解析
+    if (gradeLevels[0]?.toString().startsWith('[')) {
+      try {
+        return JSON.parse(gradeLevels.join(''));
+      } catch {
+        return [];
+      }
+    }
+    return gradeLevels;
+  }
   try {
     return JSON.parse(gradeLevels || '[]');
   } catch {
diff --git a/reading-platform-frontend/src/views/admin/collections/CollectionDetailView.vue b/reading-platform-frontend/src/views/admin/collections/CollectionDetailView.vue
index 84f7772..68e56c8 100644
--- a/reading-platform-frontend/src/views/admin/collections/CollectionDetailView.vue
+++ b/reading-platform-frontend/src/views/admin/collections/CollectionDetailView.vue
@@ -31,10 +31,14 @@
               </a-popconfirm>
             </template>
 
-            <!-- 已下架状态：显示重新发布按钮 -->
+            <!-- 已下架状态：显示编辑、删除、重新发布按钮 -->
             <template v-else-if="collection?.status === 'ARCHIVED'">
+              <a-button type="primary" @click="editCollection">编辑</a-button>
               <a-popconfirm title="确定要重新发布此套餐吗？" @confirm="handleRepublish">
-                <a-button type="primary">重新发布</a-button>
+                <a-button>重新发布</a-button>
+              </a-popconfirm>
+              <a-popconfirm title="确定要删除此套餐吗？" @confirm="handleDelete">
+                <a-button danger>删除</a-button>
               </a-popconfirm>
             </template>
 
@@ -284,10 +288,12 @@ const handleAddPackage = async () => {
 
   addingPackage.value = true;
   try {
-    // 获取当前课程包列表
-    const currentPackageIds = collection.value?.packages?.map(p => p.id) || [];
-    // 添加新的课程包ID
-    const newPackageIds = [...currentPackageIds, selectedPackageId.value];
+    // 获取当前课程包列表（去重）
+    const currentPackageIds = [...new Set(collection.value?.packages?.map(p => p.id) || [])];
+    // 添加新的课程包ID（避免重复）
+    const newPackageIds = currentPackageIds.includes(selectedPackageId.value)
+      ? currentPackageIds
+      : [...currentPackageIds, selectedPackageId.value];
 
     await collectionsApi.setCollectionPackages(route.params.id, newPackageIds);
     message.success('添加成功');
@@ -304,8 +310,8 @@ const handleAddPackage = async () => {
 // 移除课程包
 const handleRemovePackage = async (packageId: number) => {
   try {
-    // 获取当前课程包列表，移除指定的课程包
-    const currentPackageIds = collection.value?.packages?.map(p => p.id) || [];
+    // 获取当前课程包列表（去重），移除指定的课程包
+    const currentPackageIds = [...new Set(collection.value?.packages?.map(p => p.id) || [])];
     const newPackageIds = currentPackageIds.filter(id => id !== packageId);
 
     await collectionsApi.setCollectionPackages(route.params.id, newPackageIds);
diff --git a/reading-platform-frontend/src/views/admin/collections/CollectionEditView.vue b/reading-platform-frontend/src/views/admin/collections/CollectionEditView.vue
index 736f3bb..150d766 100644
--- a/reading-platform-frontend/src/views/admin/collections/CollectionEditView.vue
+++ b/reading-platform-frontend/src/views/admin/collections/CollectionEditView.vue
@@ -274,10 +274,13 @@ const handleSubmit = async () => {
       id = res.id;
     }
 
-    // 保存课程包关联（按 sortOrder 排序）
+    // 保存课程包关联（按 sortOrder 排序，去重避免唯一约束冲突）
     if (selectedPackages.value.length > 0) {
       const sorted = [...selectedPackages.value].sort((a, b) => a.sortOrder - b.sortOrder);
-      await setCollectionPackages(id, sorted.map((p) => p.packageId));
+      const packageIds = [...new Map(sorted.map((p) => [p.packageId, p])).values()]
+        .sort((a, b) => a.sortOrder - b.sortOrder)
+        .map((p) => p.packageId);
+      await setCollectionPackages(id, packageIds);
     }
 
     message.success(isEdit.value ? '套餐更新成功' : '套餐创建成功');
diff --git a/reading-platform-frontend/src/views/admin/collections/CollectionListView.vue b/reading-platform-frontend/src/views/admin/collections/CollectionListView.vue
index c9e0e42..c5e1a0a 100644
--- a/reading-platform-frontend/src/views/admin/collections/CollectionListView.vue
+++ b/reading-platform-frontend/src/views/admin/collections/CollectionListView.vue
@@ -6,38 +6,25 @@
       </template>
       <template #extra>
         <a-button type="primary" @click="handleCreate">
-          <template #icon><PlusOutlined /></template>
+          <template #icon>
+            <PlusOutlined />
+          </template>
           新建套餐
         </a-button>
       </template>
 
       <!-- 筛选 -->
       <div class="filter-section">
-        <a-select
-          v-model:value="filters.status"
-          placeholder="状态筛选"
-          style="width: 150px"
-          allowClear
-          @change="fetchData"
-        >
+        <a-select v-model:value="filters.status" placeholder="状态筛选" style="width: 150px" allowClear @change="fetchData">
           <a-select-option value="DRAFT">草稿</a-select-option>
-          <a-select-option value="PENDING">待审核</a-select-option>
-          <a-select-option value="APPROVED">已通过</a-select-option>
           <a-select-option value="PUBLISHED">已发布</a-select-option>
           <a-select-option value="ARCHIVED">已下架</a-select-option>
-          <a-select-option value="REJECTED">已驳回</a-select-option>
         </a-select>
       </div>
 
       <!-- 表格 -->
-      <a-table
-        :columns="columns"
-        :data-source="dataSource"
-        :loading="loading"
-        :pagination="pagination"
-        row-key="id"
-        @change="handleTableChange"
-      >
+      <a-table :columns="columns" :data-source="dataSource" :loading="loading" :pagination="pagination" row-key="id"
+        @change="handleTableChange">
         <template #bodyCell="{ column, record }">
           <template v-if="column.key === 'price'">
             {{ formatPrice(record.price) }}
@@ -62,11 +49,7 @@
                     <a-button type="primary" size="small" disabled>发布</a-button>
                   </span>
                 </a-tooltip>
-                <a-popconfirm
-                  v-else
-                  title="确定要发布此套餐吗？发布后学校端将可以查看。"
-                  @confirm="handlePublish(record)"
-                >
+                <a-popconfirm v-else title="确定要发布此套餐吗？发布后学校端将可以查看。" @confirm="handlePublish(record)">
                   <a-button type="primary" size="small">发布</a-button>
                 </a-popconfirm>
                 <a-popconfirm title="确定要删除吗？" @confirm="handleDelete(record)">
@@ -89,11 +72,7 @@
                     <a-button type="primary" size="small" disabled>发布</a-button>
                   </span>
                 </a-tooltip>
-                <a-popconfirm
-                  v-else
-                  title="确定要发布此套餐吗？发布后学校端将可以查看。"
-                  @confirm="handlePublish(record)"
-                >
+                <a-popconfirm v-else title="确定要发布此套餐吗？发布后学校端将可以查看。" @confirm="handlePublish(record)">
                   <a-button type="primary" size="small">发布</a-button>
                 </a-popconfirm>
               </template>
@@ -115,9 +94,13 @@
               <!-- 已下架状态 -->
               <template v-else-if="record.status === 'ARCHIVED'">
                 <a-button type="link" size="small" @click="handleView(record)">查看</a-button>
+                <a-button type="link" size="small" @click="handleEdit(record)">编辑</a-button>
                 <a-popconfirm title="确定要重新发布吗？" @confirm="handleRepublish(record)">
                   <a-button type="primary" size="small">重新发布</a-button>
                 </a-popconfirm>
+                <a-popconfirm title="确定要删除吗？" @confirm="handleDelete(record)">
+                  <a-button type="link" size="small" danger>删除</a-button>
+                </a-popconfirm>
               </template>
             </a-space>
           </template>
diff --git a/reading-platform-frontend/src/views/admin/packages/PackageEditView.vue b/reading-platform-frontend/src/views/admin/packages/PackageEditView.vue
index 01a89ca..275219b 100644
--- a/reading-platform-frontend/src/views/admin/packages/PackageEditView.vue
+++ b/reading-platform-frontend/src/views/admin/packages/PackageEditView.vue
@@ -283,10 +283,13 @@ const handleSave = async () => {
       id = res.id;  // 后端 Long 序列化为 string
     }
 
-    // 保存课程包关联（按 sortOrder 排序）
+    // 保存课程包关联（按 sortOrder 排序，去重避免唯一约束冲突）
     if (selectedPackages.value.length > 0) {
       const sorted = [...selectedPackages.value].sort((a, b) => a.sortOrder - b.sortOrder);
-      await setCollectionPackages(id, sorted.map((p) => p.packageId));
+      const packageIds = [...new Map(sorted.map((p) => [p.packageId, p])).values()]
+        .sort((a, b) => a.sortOrder - b.sortOrder)
+        .map((p) => p.packageId);
+      await setCollectionPackages(id, packageIds);
     }
 
     message.success('保存成功');
diff --git a/reading-platform-frontend/src/views/admin/packages/PackageListView.vue b/reading-platform-frontend/src/views/admin/packages/PackageListView.vue
index 1b820bd..8ed0dc6 100644
--- a/reading-platform-frontend/src/views/admin/packages/PackageListView.vue
+++ b/reading-platform-frontend/src/views/admin/packages/PackageListView.vue
@@ -169,8 +169,19 @@ const statusTexts: Record<string, string> = {
 const getStatusColor = (status: string) => statusColors[status] || 'default';
 const getStatusText = (status: string) => statusTexts[status] || status;
 
-const parseGradeLevels = (gradeLevels: string | string[]) => {
-  if (Array.isArray(gradeLevels)) return gradeLevels;
+const parseGradeLevels = (gradeLevels: string | string[] | undefined): string[] => {
+  if (!gradeLevels) return [];
+  if (Array.isArray(gradeLevels)) {
+    if (gradeLevels.length === 0) return [];
+    if (gradeLevels[0]?.toString().startsWith('[')) {
+      try {
+        return JSON.parse(gradeLevels.join(''));
+      } catch {
+        return [];
+      }
+    }
+    return gradeLevels;
+  }
   try {
     return JSON.parse(gradeLevels || '[]');
   } catch {
diff --git a/reading-platform-java/src/main/java/com/reading/platform/service/CourseCollectionService.java b/reading-platform-java/src/main/java/com/reading/platform/service/CourseCollectionService.java
index 751b06d..07f6b78 100644
--- a/reading-platform-java/src/main/java/com/reading/platform/service/CourseCollectionService.java
+++ b/reading-platform-java/src/main/java/com/reading/platform/service/CourseCollectionService.java
@@ -222,13 +222,16 @@ public class CourseCollectionService extends ServiceImpl<CourseCollectionMapper,
             throw new BusinessException("课程套餐不存在");
         }
 
+        // 去重：保持首次出现顺序，避免 uk_collection_package 唯一约束冲突
+        List<Long> distinctIds = packageIds.stream().distinct().collect(Collectors.toList());
+
         // 验证课程包是否存在（应用层外键约束）
-        if (!packageIds.isEmpty()) {
+        if (!distinctIds.isEmpty()) {
             List<CoursePackage> packages = packageMapper.selectList(
                     new LambdaQueryWrapper<CoursePackage>()
-                            .in(CoursePackage::getId, packageIds)
+                            .in(CoursePackage::getId, distinctIds)
             );
-            if (packages.size() != packageIds.size()) {
+            if (packages.size() != distinctIds.size()) {
                 throw new BusinessException("存在无效的课程包 ID");
             }
         }
@@ -240,16 +243,16 @@ public class CourseCollectionService extends ServiceImpl<CourseCollectionMapper,
         );
 
         // 创建新的关联
-        for (int i = 0; i < packageIds.size(); i++) {
+        for (int i = 0; i < distinctIds.size(); i++) {
             CourseCollectionPackage association = new CourseCollectionPackage();
             association.setCollectionId(collectionId);
-            association.setPackageId(packageIds.get(i));
+            association.setPackageId(distinctIds.get(i));
             association.setSortOrder(i + 1);
             collectionPackageMapper.insert(association);
         }
 
         // 更新课程包数量（复用前面已验证的 collection 变量）
-        collection.setPackageCount(packageIds.size());
+        collection.setPackageCount(distinctIds.size());
         collectionMapper.updateById(collection);
 
         log.info("课程套餐的课程包设置完成");
@@ -500,6 +503,25 @@ public class CourseCollectionService extends ServiceImpl<CourseCollectionMapper,
         }
     }
 
+    /**
+     * 解析适用年级：数据库存储为 JSON 数组 ["小班","中班","大班"]，需正确解析
+     */
+    private String[] parseGradeLevels(String gradeLevels) {
+        if (!StringUtils.hasText(gradeLevels)) {
+            return new String[0];
+        }
+        try {
+            if (gradeLevels.trim().startsWith("[")) {
+                return JSON.parseArray(gradeLevels, String.class).toArray(new String[0]);
+            }
+            // 兼容旧数据：逗号分隔格式
+            return gradeLevels.split(",");
+        } catch (Exception e) {
+            log.warn("解析 gradeLevels 失败: {}", gradeLevels, e);
+            return new String[0];
+        }
+    }
+
     /**
      * 转换为响应对象
      */
@@ -525,7 +547,7 @@ public class CourseCollectionService extends ServiceImpl<CourseCollectionMapper,
                 .price(collection.getPrice())
                 .discountPrice(collection.getDiscountPrice())
                 .discountType(collection.getDiscountType())
-                .gradeLevels(collection.getGradeLevels() != null ? collection.getGradeLevels().split(",") : new String[0])
+                .gradeLevels(parseGradeLevels(collection.getGradeLevels()))
                 .packageCount(collection.getPackageCount())
                 .status(collection.getStatus())
                 .submittedAt(collection.getSubmittedAt())