Description

SpaceRendererComponent accepts a dependencies parameter but only wires it into Matplotlib rendering. The Altair path does not use dependencies (or update_counter) at all, so updates that should trigger a redraw can be missed, leading to stale charts.

There’s a # FIXME: Manage dependencies properly comment at the SpaceRendererComponent signature, which appears to refer to this gap.

Steps to Reproduce

1. Create a model that updates visible state each step.
2. Use Altair backend in SolaraViz.
3. Trigger updates via update_counter or by passing dependencies.
4. Observe that the Altair chart does not re-render consistently.

Expected

Altair renders should respond to the same dependency signals as Matplotlib renders, including update_counter and any explicit dependencies passed into SpaceRendererComponent.

Actual

Altair rendering ignores dependencies, so updates may not trigger a re-render.

Proposed Fix

Compute viz_dependencies = [update_counter.value] + dependencies for both backends, and use these dependencies to drive Altair chart recomputation (e.g., via solara.use_memo or a supported dependencies argument to FigureAltair).

Possible Test

Add a test that renders SolaraViz with Altair, triggers a dependency change, and asserts that the draw methods are called again or that a new chart is produced.