[BE-15] Team / company accounts: backend

[yusuftomilola]

Overview

Every member currently pays individually. Companies and teams that want to book multiple seats under a single billing account — a standard enterprise coworking requirement — have no way to do so. A team accounts module enables B2B sales.

Context

• User entity: backend/src/users/entities/user.entity.ts
• Booking entity: backend/src/bookings/entities/booking.entity.ts
• InvoicesModule: backend/src/invoices/ — team invoices should be addressed to the team's billing email
• EmailModule: backend/src/email/ — for team invitations

Tasks

• Create Team entity: id, name, ownerId (FK to User), seatLimit (int), billingEmail, isActive, createdAt, updatedAt
• Create TeamMember entity: id, teamId, userId, role (OWNER / MEMBER), joinedAt; unique constraint on (teamId, userId)
• POST /teams — create a team (any authenticated user becomes owner)
• PATCH /teams/:id — update team name, seat limit, billing email (owner only)
• POST /teams/:id/invite — send invitation email to a user by email address (owner only)
• POST /teams/join/:inviteToken — accept invite, add to team as MEMBER
• DELETE /teams/:id/members/:userId — remove member from team (owner only, cannot remove self)
• GET /teams/me — get the team the current user belongs to (returns null if not in a team)
• GET /teams/:id — team details with member list (owner only)
• GET /teams/:id/invoices — consolidated invoice history for the team (owner only)

Files to Modify / Create

• New: backend/src/teams/ (module, entities, controller, service, providers)
• backend/src/app.module.ts

[Glittersup]

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[S-Mubarak]

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[grantfox-oss]

🎉 This issue has been marked as completed on GrantFox as part of the Official Campaign campaign!

@S-Mubarak's PR #1249 was approved and merged by @yusuftomilola.

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