Added:

1. Initial conditions support. Model variables can now be initialized either as scalars (uniform across the tissue) or as arrays (node-wise values). All initial condition fields use the init_* prefix. See the change_initial_conditions.py example.
2. Courant–Friedrichs–Lewy (CFL) condition check to warn about potential instability of the user-defined numerical parameters.
3. Propagation tests for validating model conduction velocity.
4. Reentry and Spiral waves tutorial.

Fixes:

1. Adjusted diffusion coefficients (D_model) in Fenton–Karma and Mitchell–Schaeffer models to ensure physiological conduction velocities.
2. Removed the unnecessary variable irel in the Courtemanche model (now treated as a parameter).
3. Standardized variable and parameter names in the ten-Tusscher–Panfilov 2006 model.
4. Fixed an API issue and a potential deadlock in AnimationBuilder2D/3D.

Fixed Courtemanche Diffusion value.

Main changes

• External model library.
• Kernel generator.
• Parameters as arrays and observer .
• Dimensionless names.
• Installation via pip.

See CHANGELOG for more details.

Fixed Courtemanche Cm problem (missing).

Fix for v0.8.5: Fenton-Karma Jsi equation - correct w variable.

"Release v0.8.5: new models, examples. Updated docstrings and features. Test coverage: 80%"