---
epic: 9
story: 9.7
title: "User Accounts & Storage"
status: draft
---

## Epic 9 — Web App (React + WASM)
**Goal:** Zero-install web experience with real-time collaboration.

### Story 9.7: User Accounts & Storage

As a returning user,
I want to create an account and have my sheets stored in the cloud,
So that I can access my work from any device.

**Acceptance Criteria:**

**Given** a new visitor to the web app
**When** they click "Sign Up"
**Then** they can register using email/password, Google OAuth, or GitHub OAuth
**And** a verified account is created and they are logged in

**Given** an authenticated user creates or edits a sheet
**When** the sheet is saved
**Then** it is persisted to Supabase cloud storage under their account
**And** the sheet is accessible from any device when logged in

**Given** a user is on the Free plan
**When** they attempt to create an 11th sheet
**Then** they are prevented from creating it
**And** a message prompts them to upgrade to Pro or delete an existing sheet

**Given** a user is on the Pro plan
**When** they create sheets
**Then** there is no limit on the number of stored sheets

**Given** a user is logged in on a new device
**When** the app loads
**Then** all their sheets are synced and available in the sheet list
