feat: initial project setup with implementation plan

- Add PLAN.md with 40-step checklist across 10 phases
- Add CLAUDE.md with project-specific instructions
- Set up nix flake with FastHTML/MonsterUI dependencies
- Create Python package skeleton (src/animaltrack)
- Vendor FastHTML and MonsterUI documentation
- Add Docker build configuration

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

docs/vendor/README.md

@@ -0,0 +1,43 @@
+# Vendored Documentation
+
+Locally-stored documentation for FastHTML and MonsterUI frameworks.
+
+## Contents
+
+### FastHTML (`fasthtml/`)
+
+- `llms-ctx.txt` - LLM-optimized FastHTML documentation
+- `api-core.html` - Core classes (FastHTML, serve, cookie, APIRouter)
+- `api-xtend.html` - Extended components (Form, Titled, Script)
+- `api-components.html` - Form components and utilities
+- `api-pico.html` - Pico CSS integration
+
+### MonsterUI (`monsterui/`)
+
+- `llms.txt` - LLM-optimized MonsterUI documentation
+- `apilist.txt` - List of all API components
+- `api_ref/` - Component documentation (cards, forms, modals, etc.)
+- `examples/` - Real-world usage examples
+
+## Updating Documentation
+
+### FastHTML
+
+```bash
+curl -s https://www.fastht.ml/docs/llms-ctx.txt -o docs/vendor/fasthtml/llms-ctx.txt
+curl -s https://www.fastht.ml/docs/api/core.html -o docs/vendor/fasthtml/api-core.html
+curl -s https://www.fastht.ml/docs/api/xtend.html -o docs/vendor/fasthtml/api-xtend.html
+curl -s https://www.fastht.ml/docs/api/components.html -o docs/vendor/fasthtml/api-components.html
+curl -s https://www.fastht.ml/docs/api/pico.html -o docs/vendor/fasthtml/api-pico.html
+```
+
+### MonsterUI
+
+```bash
+curl -s https://raw.githubusercontent.com/AnswerDotAI/MonsterUI/refs/heads/main/docs/llms.txt -o docs/vendor/monsterui/llms.txt
+curl -s https://raw.githubusercontent.com/AnswerDotAI/MonsterUI/refs/heads/main/docs/apilist.txt -o docs/vendor/monsterui/apilist.txt
+```
+
+## Last Updated
+
+**Date**: 2025-12-27 (copied from fitdata project)