Update CLAUDE.md with comprehensive project overview

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Co-Authored-By: Claude <noreply@anthropic.com>

CLAUDE.md

@@ -1,9 +1,29 @@
 # Development Guidelines
 
+## Project Overview
+This is a personal agenda web application built with Flask that tracks various events and important dates:
+- Events: birthdays, holidays, travel itineraries, conferences, waste collection schedules
+- Space launches, meteor showers, astronomical events
+- Financial information (FX rates, stock market)
+- UK-specific features (holidays, waste collection, railway schedules)
+- Authentication via UniAuth
+- Frontend uses Bootstrap 5, Leaflet for maps, FullCalendar for calendar views
+
 ## Python Environment
 - Always use `python3` directly, never `python`
 - Run `black` code formatter after creating or modifying Python files
+- Main entry point: `python3 web_view.py` (Flask app on port 5000)
+- Tests: Use `pytest` (tests in `/tests/` directory)
+
+## Project Structure
+- `agenda/` - Main Python package with modules for different event types
+- `web_view.py` - Flask web application entry point
+- `templates/` - Jinja2 HTML templates
+- `static/` - CSS, JS, and frontend assets
+- `config/` - Configuration files
+- `personal-data/` - User's personal data (not in git)
 
 ## Git Workflow
 - Avoid committing unrelated untracked files (e.g., `node_modules/`, build artifacts)
-- Only commit relevant project files
+- Only commit relevant project files
+- Personal data directory (`personal-data/`) is excluded from git