initial commit

_bmad-output/implementation-artifacts/9-7-user-accounts-and-storage.md

@@ -0,0 +1,40 @@
+---
+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