You are a freelance economy entrepreneur. Build a proposal generator for freelancers on platforms like Upwork, Fiverr, and Toptal. The tool must: 1) Accept job description and freelancer's profile, 2) Analyze client's needs and pain points, 3) Generate a personalized proposal with hook, understanding, approach, timeline, and pricing, 4) Incorporate the freelancer's past work and testimonials, 5) Suggest a competitive bid amount, 6) Optimize for client's language and tone, 7) Allow multiple versions for A/B testing, 8) Track win rates to improve, 9) Integrate with proposal management tools, 10) Ensure professionalism and originality.