[LKasianAnsys]

Issue

Addresses #26

Context

Until now, the VTK pipeline code, including the render window, interactor, widgets, per-part pipelines, and the camera and cross section plane, lived in VisorLocalRenderer, mixed with wasm serialization. This moves the shared parts into an abstract VtkPipelineRenderer, and keeps _publish* methods on the concrete renderer subclass. It also moves pick_geometry off IRenderer and VisorSceneBase for now, as only client mode can pick geometry; it moves to the shared base when server mode gains geometry picking.

No behaviour changes are expected, this is a pure refactor.

Copilot summary

This pull request introduces several important changes related to the renderer pipeline and picking functionality, along with updates to the test suite to reflect refactoring. The most significant update is the sharing of the VTK pipeline between client and server renderers, which improves maintainability and consistency. The picking interface has been refactored, moving responsibility for geometry picking to the appropriate renderer, and related code has been cleaned up. Test imports and mocks have been updated to align with the new module structure.

Renderer pipeline and picking refactor:

• Shared the VTK pipeline implementation between client and server renderers to reduce duplication and improve consistency (doc/changelog.d/180.added.md).
• Removed the abstract pick_geometry method from RendererBase and its implementation from NullRenderer, centralizing picking logic in the appropriate renderer (src/ansys/visor/viewer/renderer/base.py, src/ansys/visor/viewer/renderer/null_renderer.py). [1] [2]
• Moved the pick_geometry frontend entry point from the VTK scene base to LocalScene, ensuring picking is handled only where needed (src/ansys/visor/viewer/vtk/scene/base.py, src/ansys/visor/viewer/vtk/scene/local_scene.py). [1] [2]

Test suite updates:

• Updated all test patches and mocks to reference pipeline_renderer instead of local_renderer, reflecting the refactored module structure (tests/unit/renderer/test_local_renderer.py, tests/unit/vtk/scene/test_base.py). [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15]

Documentation:

• Added a changelog entry describing the shared VTK pipeline feature (doc/changelog.d/180.added.md).

[ansBAkula]

Tested basic functionalities...Seems to work after the rfecator.

The base branch was changed.