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/monsterui/api_ref/docs_markdown.md

@@ -0,0 +1,146 @@
+# Markdown + automated HTML styling API Reference
+
+See Source
+
+See Output
+
+# Example Markdown
+
+  * With **bold** and _italics_
+  * With a link
+
+### And a subheading
+
+> This is a blockquote
+
+This supports inline latex: $e^{\pi i} + 1 = 0$ as well as block latex thanks to Katex.
+
+$$ \frac{1}{2\pi i} \oint_C \frac{f(z)}{z-z_0} dz $$
+
+And even syntax highlighting thanks to Highlight.js! (Just make sure you set `highlightjs=True` in the headers function)
+
+[code]
+
+    def add(a, b):
+        return a + b
+    
+[/code]
+
+[code]
+
+    def ex_markdown():
+        md = '''# Example Markdown
+    
+    + With **bold** and *italics*
+    + With a [link](https://github.com)
+    
+    ### And a subheading
+    
+    > This is a blockquote
+    
+    This supports inline latex: $e^{\\pi i} + 1 = 0$ as well as block latex thanks to Katex.
+    
+    $$
+    \\frac{1}{2\\pi i} \\oint_C \\frac{f(z)}{z-z_0} dz
+    $$
+    
+    And even syntax highlighting thanks to Highlight.js! (Just make sure you set `highlightjs=True` in the headers function)
+    
+    ```python
+    def add(a, b):
+        return a + b
+    ```
+    '''
+        return render_md(md)
+    
+[/code]
+
+You can overwrite the default styling for markdown rendering with your own css classes with `class_map
+
+See Source
+
+See Output
+
+With custom **bold** style
+
+> But no extra quote style because class_map overrides all default styled
+[code]
+
+    def ex_markdown2():
+        md = '''With custom **bold** style\n\n > But no extra quote style because class_map overrides all default styled'''
+        return render_md(md, class_map={'b': 'text-red-500'})
+    
+[/code]
+
+You can modify the default styling for markdown rendering with your own css classes with `class_map_mods
+
+See Source
+
+See Output
+
+With custom **bold** style
+
+> But default quote style because class_map_mods replaces sepecified styles and leaves the rest as default
+[code]
+
+    def ex_markdown3():
+        md = '''With custom **bold** style\n\n > But default  quote style because class_map_mods replaces sepecified styles and leaves the rest as default'''
+        return render_md(md, class_map_mods={'b': 'text-red-500'})
+    
+[/code]
+
+This uses the `apply_classes` function, which can be used to apply classes to html strings. This is useful for applying styles to any html you get from an external source.
+
+See Source
+
+See Output
+
+<div><h1 class="uk-h1 text-4xl font-bold mt-12 mb-6">Hello, World!</h1><p class="text-lg leading-relaxed mb-6">This is a paragraph</p></div>
+
+[code]
+
+    def ex_applyclasses():
+        return apply_classes('<h1>Hello, World!</h1><p>This is a paragraph</p>')
+    
+[/code]
+
+One common external source is a markdown renderer. MonsterUI uses tailwind css for styling so you don't get any styling without specifying classes, `apply_classes` can do that for you.
+
+See Source
+
+See Output
+
+# Hi
+
+a link
+
+[code]
+
+    def ex_applyclasses2():
+        from mistletoe import markdown, HTMLRenderer
+        md = markdown('# Hi\n[a link](www.google.com)', renderer=HTMLRenderer)
+        return Safe(apply_classes(md))
+    
+[/code]
+
+### apply_classes
+
+Source
+
+[code]
+
+    apply_classes(html_str: str, class_map=None, class_map_mods=None) -> str
+[/code]
+
+> Apply classes to html string
+
+**Params**
+
+  * `html_str` Html string
+
+  * `class_map` Class map
+
+  * `class_map_mods` Class map that will modify the class map map (for small changes to base map)
+
+**Returns:** Html string with classes applied
+