feat: 实现套餐管理模块，包含套餐系列、双状态管理、废弃模型清理

- 新增套餐系列管理 (CRUD + 状态切换)
- 新增套餐管理 (CRUD + 启用/禁用 + 上架/下架双状态)
- 清理 8 个废弃分佣模型及对应数据库表
- Package 模型新增建议成本价、建议售价、上架状态字段
- 完整的 Store/Service/Handler 三层实现
- 包含单元测试和集成测试
- 归档 add-package-module change
- 新增多个 OpenSpec changes (订单支付、店铺套餐分配、一次性分佣、卡设备系列绑定)

internal/store/postgres/package_store.go

@@ -0,0 +1,97 @@
+package postgres
+
+import (
+	"context"
+
+	"gorm.io/gorm"
+
+	"github.com/break/junhong_cmp_fiber/internal/model"
+	"github.com/break/junhong_cmp_fiber/internal/store"
+)
+
+type PackageStore struct {
+	db *gorm.DB
+}
+
+func NewPackageStore(db *gorm.DB) *PackageStore {
+	return &PackageStore{db: db}
+}
+
+func (s *PackageStore) Create(ctx context.Context, pkg *model.Package) error {
+	return s.db.WithContext(ctx).Create(pkg).Error
+}
+
+func (s *PackageStore) GetByID(ctx context.Context, id uint) (*model.Package, error) {
+	var pkg model.Package
+	if err := s.db.WithContext(ctx).First(&pkg, id).Error; err != nil {
+		return nil, err
+	}
+	return &pkg, nil
+}
+
+func (s *PackageStore) GetByCode(ctx context.Context, code string) (*model.Package, error) {
+	var pkg model.Package
+	if err := s.db.WithContext(ctx).Where("package_code = ?", code).First(&pkg).Error; err != nil {
+		return nil, err
+	}
+	return &pkg, nil
+}
+
+func (s *PackageStore) Update(ctx context.Context, pkg *model.Package) error {
+	return s.db.WithContext(ctx).Save(pkg).Error
+}
+
+func (s *PackageStore) Delete(ctx context.Context, id uint) error {
+	return s.db.WithContext(ctx).Delete(&model.Package{}, id).Error
+}
+
+func (s *PackageStore) List(ctx context.Context, opts *store.QueryOptions, filters map[string]interface{}) ([]*model.Package, int64, error) {
+	var packages []*model.Package
+	var total int64
+
+	query := s.db.WithContext(ctx).Model(&model.Package{})
+
+	if packageName, ok := filters["package_name"].(string); ok && packageName != "" {
+		query = query.Where("package_name LIKE ?", "%"+packageName+"%")
+	}
+	if seriesID, ok := filters["series_id"].(uint); ok && seriesID > 0 {
+		query = query.Where("series_id = ?", seriesID)
+	}
+	if status, ok := filters["status"]; ok {
+		query = query.Where("status = ?", status)
+	}
+	if shelfStatus, ok := filters["shelf_status"]; ok {
+		query = query.Where("shelf_status = ?", shelfStatus)
+	}
+	if packageType, ok := filters["package_type"].(string); ok && packageType != "" {
+		query = query.Where("package_type = ?", packageType)
+	}
+
+	if err := query.Count(&total).Error; err != nil {
+		return nil, 0, err
+	}
+
+	if opts == nil {
+		opts = store.DefaultQueryOptions()
+	}
+	offset := (opts.Page - 1) * opts.PageSize
+	query = query.Offset(offset).Limit(opts.PageSize)
+
+	if opts.OrderBy != "" {
+		query = query.Order(opts.OrderBy)
+	}
+
+	if err := query.Find(&packages).Error; err != nil {
+		return nil, 0, err
+	}
+
+	return packages, total, nil
+}
+
+func (s *PackageStore) UpdateStatus(ctx context.Context, id uint, status int) error {
+	return s.db.WithContext(ctx).Model(&model.Package{}).Where("id = ?", id).Update("status", status).Error
+}
+
+func (s *PackageStore) UpdateShelfStatus(ctx context.Context, id uint, shelfStatus int) error {
+	return s.db.WithContext(ctx).Model(&model.Package{}).Where("id = ?", id).Update("shelf_status", shelfStatus).Error
+}