Client Portal Fullstack Saas Builder

Build a white-label AI client portal with this detailed full-stack SaaS prompt. Guide a coding agent through Next.js, Supabase, Stripe, projects, tasks, invoices, proposals, contracts, private files, messaging and client approvals. Customize your niche, branding, roles, currencies and feature flags. Includes tenant security requirements, editable AI drafts, demo mode, testing & deployment instructions. Ideal for agencies, freelancers and consultants creating a branded client management platform.