docs: update project documentation and verification strategies

- Update GEMINI.md with verification steps and remove ignored docs reference
- Update README.md to remove reference to local langchain-docs
- Update backend/GEMINI.md with correct database schema (users table) and architecture details
- Update frontend/GEMINI.md with latest project structure

README.md

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+# Election Analytics Chatbot
+
+A stateful, graph-based chatbot for election data analysis, built with LangGraph, FastAPI, and React.
+
+## 🚀 Features
+
+- **Intelligent Query Analysis**: Automatically determines if a query needs data analysis, web research, or clarification.
+- **Automated Data Analysis**: Generates and executes Python code to analyze election datasets and produce visualizations.
+- **Web Research**: Integrates web search capabilities for general election-related questions.
+- **Stateful Conversations**: Maintains context across multiple turns using LangGraph's persistent checkpointing.
+- **Real-time Streaming**: Streams reasoning steps, code execution outputs, and plots to the UI.
+- **Secure Authentication**: Traditional login and OIDC/SSO support with HttpOnly cookies.
+- **History Management**: Persistent storage and management of chat history and generated artifacts.
+
+## 🏗️ Project Structure
+
+- `backend/`: Python FastAPI application using LangGraph.
+- `frontend/`: React SPA built with TypeScript, Vite, and Tailwind CSS.
+
+## 🛠️ Prerequisites
+
+- Python 3.11+
+- Node.js 18+
+- PostgreSQL
+- Docker (optional, for Postgres/PgAdmin)
+- API Keys: OpenAI/Google Gemini, Google Search (if using research tools).
+
+## 📥 Getting Started
+
+### Backend Setup
+
+1. Navigate to the backend directory:
+   ```bash
+   cd backend
+   ```
+2. Install dependencies:
+   ```bash
+   uv sync
+   ```
+3. Set up environment variables:
+   ```bash
+   cp .env.example .env
+   # Edit .env with your configuration and API keys
+   ```
+4. Run database migrations:
+   ```bash
+   uv run alembic upgrade head
+   ```
+5. Start the server:
+   ```bash
+   uv run python -m ea_chatbot.api.main
+   ```
+
+### Frontend Setup
+
+1. Navigate to the frontend directory:
+   ```bash
+   cd frontend
+   ```
+2. Install dependencies:
+   ```bash
+   npm install
+   ```
+3. Start the development server:
+   ```bash
+   npm run dev
+   ```
+
+## 📖 Documentation
+
+- **[Top-level GEMINI.md](./GEMINI.md)**: General project overview.
+- **[Backend Guide](./backend/GEMINI.md)**: Detailed backend architecture and implementation details.
+- **[Frontend Guide](./frontend/GEMINI.md)**: Frontend development guide and technology stack.
+
+## 📜 License
+
+This project is licensed under the MIT License - see the LICENSE file for details.