- Add stripeCustomerId column to users table
- Create Stripe client initialization (web/src/server/stripe.ts)
- Add billing service with getOrCreateCustomer, checkout/portal sessions,
subscription management, invoice listing, and webhook event handling
- Create billing tRPC router with getSubscription, createCheckoutSession,
createPortalSession, cancelSubscription, reactivateSubscription, listInvoices
- Add raw webhook endpoint at /api/stripe/webhook with signature verification
- Define Valibot schemas for all billing procedure inputs
- Wire billing router into root tRPC router
- Update schema tests for new column/index counts
- Write unit tests for billing service and router
- Add user router with me/update/delete procedures (protected)
- Add family router with listMembers/invite/remove/updateRole procedures
- Create user service layer (getUserById, updateUser, deleteUser)
- Create family service layer (getFamilyGroup, inviteMember, removeMember, updateMemberRole, transferOwnership)
- Add Valibot input schemas for all procedures
- Add invitations table with status tracking and expiration
- Add deletedAt column to users table (soft-delete)
- Wire user router into app root router
- Write unit tests for service functions and tRPC procedures
- Update schema tests for new table/columns
