UI: Left sidebar directory selection does not highlight 3D points or update detail panel

[Maystern]

What problem does this solve?

In the current UI, selecting an item from the left sidebar directory fails to:

1. Highlight/select the corresponding 3D point in the visualization.
2. Update the right-side detail panel (it still shows data from the previously selected point)
   The user must instead click the point directly in the 3D viewport to see its call relationships on the right. This
   breaks the expected navigation flow and makes it hard to explore the code graph and spot issues.

Proposed solution

When the user selects an entry in the left sidebar directory, the UI should:

1. Automatically select/highlight the corresponding 3D point in the central viewport.
2. Automatically update the right-side panel to display that point's call relationships.

This would restore the expected navigation behavior — left sidebar → 3D viewport → right detail panel — and make the code graph much easier to explore.

Alternatives considered

No response

Confirmations

• I searched existing issues and this is not a duplicate.

[DeusData]

Thanks for the clear interaction sequence. I have classified this as a 0.9.1-rc UI behavior bug under #396 rather than a new feature: selecting an existing graph item in the directory tree should update the shared selection state, 3D highlight, and detail panel consistently.