[max-models]

• Method cards on the geometry (34): the inside tests and level sets of every shape, the Boolean, affine and section level sets, collections, outlines and panels, the first crossings, the swept polygon hit test and absorption, the edge crossings, cut edges and cut-cell fractions, the grid, the domain decomposition and the particle boundaries, with assumptions and references. test_method_cards.py checks them: SymPy rules for 19 closed forms, the observed order of outlines, crossings and intersection_fractions, and the cards of the docs against those of the code.
• A Numerics link in the header and a Numerics sidebar group: a hand-written overview (docs/src/content/docs/numerics/index.mdx: shapes, crossings, cut cells, grids, conventions, what is not covered, verification) and one page per module (methodcard: { pages: true }, starlight-theme 0.7.4).
• The docstrings render on the API pages: code spans instead of reST roles.
• Smoke paths for the numerics pages; adds the methodcard dependency.