fix: some fixes of multiple notification read (#8819)

* fix: limit multiple notification read

* fix

* fix

packages/backend/src/server/api/common/read-notification.ts

@@ -9,6 +9,8 @@ export async function readNotification(
 	userId: User['id'],
 	notificationIds: Notification['id'][]
 ) {
+	if (notificationIds.length === 0) return;
+
 	// Update documents
 	await Notifications.update({
 		id: In(notificationIds),

packages/backend/src/server/api/endpoints/notifications/read.ts

@@ -34,7 +34,11 @@ export const paramDef = {
 		{
 			type: 'object',
 			properties: {
-				notificationIds: { type: 'array', items: { type: 'string', format: 'misskey:id' } },
+				notificationIds: {
+					type: 'array',
+					items: { type: 'string', format: 'misskey:id' },
+					maxItems: 100,
+				},
 			},
 			required: ['notificationIds'],
 		},