Changes from background agent bc-e56ee320-1921-4e88-88c5-1f2a93d9a874

[kairos-xx]

Fixes replaceAll breaking cycling navigation by ensuring the first panel is always selected and the layout is reset for full panel accessibility.

When virtualize was enabled, calling replaceAll could leave panels incorrectly positioned or inaccessible for cycling, especially if the previously active panel was not the first one. This PR ensures that after replaceAll, the first panel (index 0) is always set as the current panel, and the layout is explicitly reset to allow seamless navigation through all panels, regardless of renderRadius.

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[cursor]

Cursor Agent can help with this pull request. Just @cursor in comments and I'll start working on changes in this branch.
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