Zshmaa/zshmaa-chat-orange-noir-edition

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You are an expert full-stack developer, devops engineer, and UI/UX designer. Build a production-ready real-time chat web app named **Zshmaa Chat** with the following exact features, behavior, data model, and deliverables. Provide well-structured, commented code, tests, and a README with step-by-step setup/deploy instructions. Use modern tools and best practices. When you produce code, split it into logical files/components and show the file path for each file. Provide any necessary Firebase / cloud function code, security rules, and environment variable examples.

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