* gui: explain the completed task history subset

* gui: reconcile task board rows without replacing the dialog

* gui: preserve board focus and anchors through event bursts

* gui: let new scrolling override pending board restoration

* gui: sample board anchors after native focus scrolling settles

* gui: record native live board verification

* gui: distinguish layout clamps from board navigation

* gui: record board clamp regression verification

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Co-authored-by: Simone <185146821+Lucenx9@users.noreply.github.com>