feat: add Dolphin MCP integration and update project documentation

project_planning/PLAN.md

@@ -0,0 +1,56 @@
+# Streamlit Chat App Implementation Plan
+
+## Project Setup
+```bash
+# Create and activate virtual environment
+uv venv -p 3.12 env
+source env/bin/activate
+
+# Install dependencies using UV
+uv pip install -e .
+```
+
+## Configuration Management
+1. Edit `config/config.ini`:
+```ini
+[openai]
+api_key = your_api_key_here
+base_url = https://api.openai.com/v1
+model = gpt-3.5-turbo
+```
+
+2. Security practices:
+- Never commit config.ini to version control
+- Use environment variables for production deployment
+
+## Modular Code Structure
+```mermaid
+graph TD
+    A[app.py] --> B[OpenAIClient]
+    B --> C[config.ini]
+    A --> D[Streamlit Components]
+    
+    style A fill:#4CAF50
+    style B fill:#2196F3
+    style C fill:#FF9800
+```
+
+### Key Modules:
+1. `openai_client.py`: API communication layer
+2. `app.py`: Streamlit UI and business logic
+3. `config/`: Centralized configuration management
+
+## Development Workflow
+1. Testing:
+```bash
+streamlit run src/app.py
+```
+
+2. Maintenance:
+- Update dependencies with `uv pip install -r requirements.txt`
+- Validate config changes before deployment
+
+## Best Practices
+- Type hints for all function signatures
+- Separate UI logic from business logic
+- Use Streamlit session state judiciously