Refactor: Code Structure Update & UI Redesign

Refactor: Enhanced UI (Tabs/Explorer) and Modular Components

Improve UX: Move upload UI to main area

Refactor UI to Code Studio IDE layout

feat: Restructure into multi-page app with shared styling

fix: Add IDE-style panel scrolling

feat: Implement 3-panel file explorer UI

fix: Wire up 'Try asking' suggestion buttons to chat

fix: Switch to FAISS as default and use /tmp for persist directory

fix: Use /tmp directory for Hugging Face compatibility

fix: Use gemini-2.5-flash as default (confirmed working)

fix: Update Gemini model list to available models

feat: Add local embeddings to bypass API rate limits

feat: Add MCP + CrewAI integration with multi-mode interface

Refactor: Upgraded to Agentic Chatbot with AST & Call Graph support