Track KWin Overview through the activeEffects DBus property and expose the state to Folio QML. Hide the workspace frame, dock overlay, and in-containment favourites scrim while Overview is active so the effect does not show Shift shell chrome in its desktop view.
Set the state before invoking the Overview shortcut from Folio so the chrome is already gone when KWin starts composing the effect. The convergence dock invariant now guards both the hide rules and this ordering.
Reserve side and bottom decoration borders for normal windows and draw a rounded decoration frame so windows match the convergence workspace shape. Add static guards for the decoration and existing workspace-frame corner geometry.
Introduce shared dock height/reveal constants and use them in folio and taskpanel to keep overlay and exclusion zone aligned. Keep dock backing stationary while only content slides, and add a CTest invariant script to prevent regressions.
