v0.6.0 — Release Notes

New Features

Prescribed displacements: Support for imposing known displacements at any DOF, enabling modelling of support settlements. Specify via the D argument to BeamAnalysis.
Spring support reactions: Spring forces are now reported in beam_results.Rs (upward positive, i.e. -k_s × u).

Load superposition: Fixed MemberResults.__add__ which was incorrectly accumulating shear (V) instead of rotation (R) when superimposing load cases.
Spring stiffness double-counting: Fixed a bug where spring stiffness was being added to the global stiffness matrix twice, giving incorrect results for spring-supported beams.
Spring reaction sign: Spring forces in beam_results.Rs are now reported with correct sign (upward positive).

Theory documentation: Expanded theory.ipynb to cover global stiffness matrix assembly, spring supports, boundary condition enforcement, prescribed displacements, and reaction recovery.
Type definitions: Shared types (LoadType, LoadMatrix, LoadCNL, MemberResults) consolidated into types.py; explicit API exports replace wildcard imports.
CI: Dropped Python 3.8 support; added Python 3.12 and 3.13 to the test matrix. Minimum supported version is now Python 3.9.
Docs build: Replaced the unmaintained ammaraskar/sphinx-action with a native build step, fixing the GitHub Pages deployment.

Full Changelog: v0.5.2...v0.6.0