chore: add 10MB of grace bytes for storage quota (#1904)

apps/readest-app/src/pages/api/storage/upload.ts

@@ -1,7 +1,11 @@
 import type { NextApiRequest, NextApiResponse } from 'next';
 import { createSupabaseClient } from '@/utils/supabase';
 import { corsAllMethods, runMiddleware } from '@/utils/cors';
-import { getStoragePlanData, validateUserAndToken } from '@/utils/access';
+import {
+  getStoragePlanData,
+  validateUserAndToken,
+  STORAGE_QUOTA_GRACE_BYTES,
+} from '@/utils/access';
 import { getUploadSignedUrl } from '@/utils/object';
 
 export default async function handler(req: NextApiRequest, res: NextApiResponse) {
@@ -23,7 +27,7 @@ export default async function handler(req: NextApiRequest, res: NextApiResponse)
     }
 
     const { usage, quota } = getStoragePlanData(token);
-    if (usage + fileSize > quota) {
+    if (usage + fileSize > quota + STORAGE_QUOTA_GRACE_BYTES) {
       return res.status(403).json({ error: 'Insufficient storage quota', usage });
     }
 

apps/readest-app/src/utils/access.ts

@@ -16,6 +16,8 @@ export const getUserPlan = (token: string): UserPlan => {
   return data['plan'] || 'free';
 };
 
+export const STORAGE_QUOTA_GRACE_BYTES = 10 * 1024 * 1024; // 10 MB grace
+
 export const getStoragePlanData = (token: string) => {
   const data = jwtDecode<Token>(token) || {};
   const plan = data['plan'] || 'free';