Enhance analysis result rendering and processing in frontend and backend

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Temporarily mock analysis result in endpoint for testing

Enhance analysis service with robust code generation and execution

Add chart schemas and enhance analysis service code generation

Refactor analysis service to use dynamic code generation with input data

Enhance NLP service with dataset-aware analysis plan generation

Handle refusal responses in NLP and analysis services

Refactor NLPService to simplify analysis plan generation

Enhance analysis pipeline with dynamic step execution and code generation

Improve error handling and session management in Chat component

Refactor Chat component and remove Chat2 component

Made changes to improve how we send user query to backend and also how UI handles different chat related events.