Add vertical App Shelf keyboard focus

Ariver

2026-06-18 b6e11990cc9bd3c838ad6cdd9e53caafff0fd7cb

 C1.source/Sources/Aligner/QuickSwitchSessionController.swift

@@ -86,7 +86,7 @@
    private var lifecycleResidualOverlayWindows = 0
    private var lifecycleResidualVisibleOverlayWindows = 0
    var onSnapshotUpdated: (() -> Void)?
    var onOpenSettings: (() -> Void)?
    var onToggleWaterfallViewMode: (() -> Void)?

    private struct PendingCloseVerification {
        let request: QuickSwitchCloseRequest
@@ -213,8 +213,8 @@
        view.onBackgroundClick = { [weak self] in
            self?.handleBackgroundClick() ?? false
        }
        view.onOpenSettings = { [weak self] in
            self?.onOpenSettings?()
        view.onToggleWaterfallViewMode = { [weak self] in
            self?.onToggleWaterfallViewMode?()
        }
        view.setSuppressEventInput(!debugMouseSequence.isEmpty || !debugKeySequence.isEmpty)
        view.onRequestClose = { [weak self] request in
@@ -280,7 +280,27 @@

    func retriggerFromShortcut() {
        DevelopmentDiagnostics.log("quickSwitch.session.retriggerFromShortcut")
        show()
        guard isVisible else {
            show()
            return
        }

        guard currentViewModel != nil else {
            DevelopmentDiagnostics.log("quickSwitch.session.retriggerFromShortcut.noSnapshot", [
                "action": "fallbackShow"
            ])
            show()
            return
        }

        let didCycle = view.hoverNextAppGroupIndex()
        DevelopmentDiagnostics.log("quickSwitch.session.retriggerFromShortcut.hoverApp", [
            "didCycle": didCycle
        ])

        if !didCycle {
            show()
        }
    }

    func setWaterfallViewMode(_ mode: QuickSwitchWaterfallViewMode) {