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Fix chat tabs moving between editor groups after Developer: Reload Window.
Restoring an embedded website no longer calls reveal(). VS Code restores the original group, tab order and active tab; background tabs stay in place when activated later. Session navigation and the website adapter identity are preserved. Sidebar tabs remain independently restored.
Verified with 37 tests and an isolated desktop VS Code scenario with three tabs in the left editor group and two in the right: actual window reload, restored selection/order and activation of all background tabs.