fix: 店铺分配覆盖为实名即生效的套餐纳入沉默期配置口径

存量中套餐本身购买即生效、店铺分配覆盖为实名即生效的正式套餐，购买后同样等实名，
但原口径只看套餐本身：无法配置默认沉默期、不进未配置清单与打开前检查，
待实名记录无法回填导致总开关打不开，新购买也绕过沉默期。

- 未配置清单与打开前检查纳入存在实名即生效分配覆盖的套餐
- 购买即生效正式套餐允许选填默认沉默期，加油包仍禁止
- 分配覆盖购买即生效 → 实名即生效在套餐已配置默认沉默期时放行
- 同步 OpenSpec design D11、spec、tasks 3.4/3.5 与前端说明

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

internal/store/postgres/package_store.go

@@ -154,7 +154,10 @@ func (s *PackageStore) CountBySeriesID(ctx context.Context, seriesID uint) (int6
 }
 
 // SilenceUnconfiguredPackageCondition 返回"未配置默认沉默期的实名即生效正式套餐"的条件（总开关打开前检查与补齐清单共用）。
+// 实名即生效包含套餐本身 from_activation，以及存在未删除的店铺分配覆盖为 from_activation 的套餐（design D11）。
 func SilenceUnconfiguredPackageCondition(alias string) string {
-	return alias + ".package_type <> '" + constants.PackageTypeAddon + "' AND " + alias + ".expiry_base = '" +
-		constants.PackageExpiryBaseFromActivation + "' AND " + alias + ".silence_period_days IS NULL"
+	return alias + ".package_type <> '" + constants.PackageTypeAddon + "' AND " + alias + ".silence_period_days IS NULL AND (" +
+		alias + ".expiry_base = '" + constants.PackageExpiryBaseFromActivation + "' OR EXISTS (" +
+		"SELECT 1 FROM tb_shop_package_allocation AS silence_alloc WHERE silence_alloc.package_id = " + alias + ".id" +
+		" AND silence_alloc.deleted_at IS NULL AND silence_alloc.expiry_base_override = '" + constants.PackageExpiryBaseFromActivation + "'))"
 }