Nutrition plan platform and client management for a dietitian

We are a nutritional consulting practice, and we need a web platform to replace the pile of spreadsheets where we currently keep our clients. Each questionnaire, each goal, each weekly meal plan, and each weigh-in lives in a separate file, and the thread is lost between visits. We need one system where a new client fills out a questionnaire — habits, allergies, medical notes, target weight, lifestyle — and this profile becomes the foundation for everything that follows. The dietitian should set measurable goals and see them right away. The heart of our work is meal planning. We need a reusable recipe and dish library with portions and calculated calories, protein, fat, and carbohydrates, so a personalized daily or weekly meal plan can be assembled quickly and adjusted for a specific client. Clients mark from their phone what they actually ate and their weight; the platform shows progress charts, comparing the plan to reality and highlighting when a person deviates. Appointments and simple messaging within the system tie everything together, with reminders before each visit. We're a small team, so the interface should be calm and intuitive. Suggest a tech stack, data model, and phased plan: first questionnaires and meal plans, then charts and messaging. Expected modules: — client questionnaire, goals, and profile history; — recipe library with automatic nutrient and calorie calculation; — personalized daily and weekly meal plans; — food and weight diary from mobile; — progress charts and appointment booking with reminders.