From 6827b8fc6ac32217cc27e5095422e9496739643f Mon Sep 17 00:00:00 2001
From: Ariver <shanghai3168@gmail.com>
Date: Sat, 13 Jun 2026 19:15:50 +0800
Subject: [PATCH] Fix app grid usage tips interactions

---
 src/Apptag/AppGridCollectionView.swift   |  591 +++++++++++++++++++++++++++++++++-----
 src/Scripts/usage_tips_qa.sh             |  227 ++++++++++++++
 src/Apptag/OverlayWindowController.swift |    6 
 src/Apptag/ApptagApp.swift               |   32 ++
 4 files changed, 765 insertions(+), 91 deletions(-)

diff --git a/src/Apptag/AppGridCollectionView.swift b/src/Apptag/AppGridCollectionView.swift
index 788dc43..24ad5f3 100644
--- a/src/Apptag/AppGridCollectionView.swift
+++ b/src/Apptag/AppGridCollectionView.swift
@@ -1,5 +1,6 @@
 import SwiftUI
 import AppKit
+import Carbon.HIToolbox
 
 fileprivate enum AppGridCollectionDisplayMode: Equatable {
     case flat
@@ -37,10 +38,11 @@
 }
 
 enum AppGridUsageTipsMetrics {
-    static let barHeight: CGFloat = 68
-    static let reservedHeight: CGFloat = 104
-    static let bottomMargin: CGFloat = 18
-    static let horizontalInset: CGFloat = AppGridCollectionMetrics.outerPadding
+    static let barHeight: CGFloat = 84
+    static let reservedHeight: CGFloat = 128
+    static let bottomMargin: CGFloat = 20
+    static let horizontalInset: CGFloat = 24
+    static let minWidth: CGFloat = 640
 }
 
 struct AppGridCollectionView: NSViewRepresentable {
@@ -432,6 +434,7 @@
     private let scrollView = AppGridScrollView()
     private let collectionView = NSCollectionView()
     private let gridLayout = AppGridContainerCollectionLayout()
+    private let usageTipsShieldView = AppGridUsageTipsShieldView()
     private let usageTipsView = AppGridUsageTipsNSView()
     private weak var coordinator: AppGridCollectionView.Coordinator?
     private var scrollObserver: NSObjectProtocol?
@@ -439,6 +442,8 @@
     private var lastReportedBoundsOrigin: NSPoint?
     private var scrollUnfreezeWorkItem: DispatchWorkItem?
     private var scrollActivityIsActive = false
+    private var usageTipsEventRegionIsClaimed = false
+    private var usageTipsMouseMonitor: Any?
 
     override var isFlipped: Bool { true }
 
@@ -456,6 +461,7 @@
         if let scrollObserver {
             NotificationCenter.default.removeObserver(scrollObserver)
         }
+        removeUsageTipsMouseMonitor()
         scrollUnfreezeWorkItem?.cancel()
         coordinator?.cancelAppIconDrag()
         AppDragCoordinator.shared.unregisterEmptyDropTarget(id: emptyDropTargetID)
@@ -508,12 +514,23 @@
     override func viewDidMoveToWindow() {
         super.viewDidMoveToWindow()
         if window == nil {
+            removeUsageTipsMouseMonitor()
             AppDragCoordinator.shared.cancelDrag()
             coordinator?.cancelAppIconDrag()
             AppDragCoordinator.shared.unregisterEmptyDropTarget(id: emptyDropTargetID)
         } else {
+            installUsageTipsMouseMonitor()
             AppDragCoordinator.shared.registerEmptyDropTarget(id: emptyDropTargetID, view: self)
         }
+    }
+
+    override func hitTest(_ point: NSPoint) -> NSView? {
+        if !usageTipsView.isHidden,
+           usageTipsView.frame.contains(point) {
+            let tipsPoint = usageTipsView.convert(point, from: self)
+            return usageTipsView.hitTest(tipsPoint) ?? usageTipsView
+        }
+        return super.hitTest(point)
     }
 
     func performEmptyDrop(path: String, source: String, screenPoint: NSPoint, copy: Bool) {
@@ -552,8 +569,16 @@
         scrollView.borderType = .noBorder
         scrollView.documentView = collectionView
         addSubview(scrollView)
+        usageTipsShieldView.isHidden = true
+        usageTipsShieldView.onClaim = { [weak self] in
+            self?.claimUsageTipsEventRegion()
+        }
+        usageTipsShieldView.onRelease = { [weak self] in
+            self?.releaseUsageTipsEventRegion()
+        }
         usageTipsView.isHidden = true
-        addSubview(usageTipsView)
+        addSubview(usageTipsShieldView, positioned: .above, relativeTo: scrollView)
+        addSubview(usageTipsView, positioned: .above, relativeTo: usageTipsShieldView)
 
         scrollView.contentView.postsBoundsChangedNotifications = true
         scrollObserver = NotificationCenter.default.addObserver(
@@ -573,17 +598,63 @@
               coordinator.usageTipsVisible
         else {
             usageTipsView.isHidden = true
+            usageTipsShieldView.isHidden = true
             usageTipsView.clearHoverState()
+            releaseUsageTipsEventRegion()
             usageTipsView.frame = .zero
+            usageTipsShieldView.frame = .zero
             return
         }
 
         let inset = min(AppGridUsageTipsMetrics.horizontalInset, max(0, bounds.width / 4))
-        let width = max(1, bounds.width - inset * 2)
+        let availableWidth = max(1, bounds.width - inset * 2)
+        let width = usageTipsView.preferredWidth(maxAvailableWidth: availableWidth)
         let height = AppGridUsageTipsMetrics.barHeight
-        let y = max(0, bounds.height - AppGridUsageTipsMetrics.bottomMargin - height)
+        usageTipsShieldView.isHidden = false
+        usageTipsShieldView.frame = usageTipsEventRegion()
+        usageTipsView.configureVisualLayout(
+            width: width,
+            height: height,
+            bottomMargin: AppGridUsageTipsMetrics.bottomMargin
+        )
         usageTipsView.isHidden = false
-        usageTipsView.frame = NSRect(x: inset, y: y, width: width, height: height)
+        usageTipsView.frame = usageTipsEventRegion()
+    }
+
+    fileprivate func relayoutUsageTipsAfterContentChange() {
+        positionUsageTipsView()
+        usageTipsView.needsLayout = true
+    }
+
+    private func usageTipsEventRegion() -> NSRect {
+        guard let coordinator,
+              coordinator.usageTipsVisible
+        else { return .zero }
+        let height = min(bounds.height, AppGridUsageTipsMetrics.reservedHeight)
+        return NSRect(
+            x: 0,
+            y: max(0, bounds.height - height),
+            width: bounds.width,
+            height: height
+        )
+    }
+
+    private func claimUsageTipsEventRegion() {
+        usageTipsEventRegionIsClaimed = true
+        window?.makeFirstResponder(usageTipsView)
+        if coordinator?.setUsageTipsBubbleDisabled(true) == true {
+            refreshVisibleRuntimeState()
+        }
+        coordinator?.onUsageTipsHoverChange(true)
+    }
+
+    private func releaseUsageTipsEventRegion() {
+        guard usageTipsEventRegionIsClaimed else { return }
+        usageTipsEventRegionIsClaimed = false
+        if coordinator?.setUsageTipsBubbleDisabled(false) == true {
+            refreshVisibleRuntimeState()
+        }
+        coordinator?.onUsageTipsHoverChange(false)
     }
 
     private func handleScrollActivity() {
@@ -623,6 +694,58 @@
         refreshVisibleRuntimeState()
     }
 
+    func handleUsageTipsMouseDown(_ event: NSEvent) -> Bool {
+        handleUsageTipsMouseEvent(event, triggerButtons: true)
+    }
+
+    private func handleUsageTipsMouseEvent(_ event: NSEvent, triggerButtons: Bool) -> Bool {
+        let point = usageTipsHostPoint(for: event)
+        guard !usageTipsView.isHidden,
+              usageTipsView.frame.contains(point)
+        else { return false }
+
+        return usageTipsView.handleMouseEventFromHost(event, triggerButtons: triggerButtons)
+    }
+
+    private func installUsageTipsMouseMonitor() {
+        guard usageTipsMouseMonitor == nil else { return }
+        usageTipsMouseMonitor = NSEvent.addLocalMonitorForEvents(
+            matching: [
+                .leftMouseDown,
+                .leftMouseUp,
+                .rightMouseDown,
+                .rightMouseUp,
+                .otherMouseDown,
+                .otherMouseUp
+            ]
+        ) { [weak self] event in
+            guard let self,
+                  self.window != nil,
+                  self.handleUsageTipsMouseEvent(
+                    event,
+                    triggerButtons: event.type == .leftMouseDown
+                  )
+            else { return event }
+            return nil
+        }
+    }
+
+    private func usageTipsHostPoint(for event: NSEvent) -> NSPoint {
+        if event.window === window {
+            return convert(event.locationInWindow, from: nil)
+        }
+        guard let window else { return .zero }
+        let windowPoint = window.convertPoint(fromScreen: NSEvent.mouseLocation)
+        return convert(windowPoint, from: nil)
+    }
+
+    private func removeUsageTipsMouseMonitor() {
+        if let usageTipsMouseMonitor {
+            NSEvent.removeMonitor(usageTipsMouseMonitor)
+            self.usageTipsMouseMonitor = nil
+        }
+    }
+
     private func replayPointerHover() {
         guard let window else { return }
         let windowPoint = window.convertPoint(fromScreen: NSEvent.mouseLocation)
@@ -645,22 +768,80 @@
     }
 }
 
+private final class AppGridUsageTipsShieldView: NSView {
+    var onClaim: (() -> Void)?
+    var onRelease: (() -> Void)?
+
+    private var trackingAreaRef: NSTrackingArea?
+
+    override var isFlipped: Bool { true }
+    override var acceptsFirstResponder: Bool { false }
+    override var mouseDownCanMoveWindow: Bool { false }
+
+    override func acceptsFirstMouse(for event: NSEvent?) -> Bool {
+        true
+    }
+
+    override func updateTrackingAreas() {
+        super.updateTrackingAreas()
+        if let trackingAreaRef {
+            removeTrackingArea(trackingAreaRef)
+        }
+        let area = NSTrackingArea(
+            rect: .zero,
+            options: [.mouseEnteredAndExited, .mouseMoved, .activeAlways, .inVisibleRect],
+            owner: self,
+            userInfo: nil
+        )
+        addTrackingArea(area)
+        trackingAreaRef = area
+    }
+
+    override func hitTest(_ point: NSPoint) -> NSView? {
+        guard !isHidden, bounds.contains(point) else { return nil }
+        onClaim?()
+        return self
+    }
+
+    override func mouseEntered(with event: NSEvent) { onClaim?() }
+    override func mouseMoved(with event: NSEvent) { onClaim?() }
+    override func mouseDragged(with event: NSEvent) { onClaim?() }
+    override func mouseExited(with event: NSEvent) { onRelease?() }
+    override func mouseDown(with event: NSEvent) {
+        Diagnostics.log("usageTips.shield.mouseDown")
+        onClaim?()
+    }
+    override func mouseUp(with event: NSEvent) {}
+    override func rightMouseDown(with event: NSEvent) { onClaim?() }
+    override func rightMouseUp(with event: NSEvent) {}
+    override func otherMouseDown(with event: NSEvent) { onClaim?() }
+    override func otherMouseUp(with event: NSEvent) {}
+    override func scrollWheel(with event: NSEvent) { onClaim?() }
+}
+
 private final class AppGridUsageTipsNSView: NSView {
     weak var coordinator: AppGridCollectionView.Coordinator?
 
-    private let titleBackgroundView = NSView()
+    private let backgroundView = NSVisualEffectView()
+    private let iconView = AppGridDecorativeImageView()
     private let titleLabel = NSTextField(labelWithString: "")
     private let detailScrollView = NSScrollView()
     private let detailLabel = NSTextField(labelWithString: "")
-    private let controlsView = NSView()
     private let previousButton = AppGridUsageTipIconButton(systemImage: "chevron.left")
     private let nextButton = AppGridUsageTipIconButton(systemImage: "chevron.right")
     private let dotsView = AppGridUsageTipDotsView()
     private var trackingAreaRef: NSTrackingArea?
     private var isPointerInside = false
+    private var visualWidth: CGFloat = AppGridUsageTipsMetrics.minWidth
+    private var visualHeight: CGFloat = AppGridUsageTipsMetrics.barHeight
+    private var visualBottomMargin: CGFloat = AppGridUsageTipsMetrics.bottomMargin
+
+    private let titleFont = NSFont.systemFont(ofSize: 24, weight: .semibold)
+    private let detailFont = NSFont.systemFont(ofSize: 24, weight: .regular)
 
     override var isFlipped: Bool { true }
-    override var acceptsFirstResponder: Bool { false }
+    override var acceptsFirstResponder: Bool { true }
+    override var mouseDownCanMoveWindow: Bool { false }
 
     override init(frame frameRect: NSRect) {
         super.init(frame: frameRect)
@@ -670,6 +851,10 @@
     required init?(coder: NSCoder) {
         super.init(coder: coder)
         setup()
+    }
+
+    override func acceptsFirstMouse(for event: NSEvent?) -> Bool {
+        true
     }
 
     override func viewDidMoveToWindow() {
@@ -686,7 +871,7 @@
         }
         let area = NSTrackingArea(
             rect: .zero,
-            options: [.mouseEnteredAndExited, .activeAlways, .inVisibleRect],
+            options: [.mouseEnteredAndExited, .mouseMoved, .activeAlways, .inVisibleRect],
             owner: self,
             userInfo: nil
         )
@@ -696,11 +881,20 @@
 
     override func hitTest(_ point: NSPoint) -> NSView? {
         guard !isHidden, bounds.contains(point) else { return nil }
-        return super.hitTest(point) ?? self
+        setPointerInside(true)
+        let hitView = super.hitTest(point)
+        if hitView == nil || hitView === backgroundView || hitView?.isDescendant(of: backgroundView) == true {
+            return self
+        }
+        return hitView
     }
 
     override func mouseEntered(with event: NSEvent) {
-        setPointerInside(true)
+        claimInteractionFocus()
+    }
+
+    override func mouseMoved(with event: NSEvent) {
+        claimInteractionFocus()
     }
 
     override func mouseExited(with event: NSEvent) {
@@ -708,12 +902,33 @@
     }
 
     override func mouseDown(with event: NSEvent) {
-        window?.makeKeyAndOrderFront(nil)
+        Diagnostics.log("usageTips.hud.mouseDown")
+        if routeButtonClickIfNeeded(event) {
+            return
+        }
+        claimInteractionFocus()
+    }
+
+    override func mouseDragged(with event: NSEvent) {
+        claimInteractionFocus()
     }
 
     override func mouseUp(with event: NSEvent) {}
-    override func rightMouseDown(with event: NSEvent) {}
+    override func rightMouseDown(with event: NSEvent) { claimInteractionFocus() }
     override func rightMouseUp(with event: NSEvent) {}
+    override func otherMouseDown(with event: NSEvent) { claimInteractionFocus() }
+    override func otherMouseUp(with event: NSEvent) {}
+
+    override func keyDown(with event: NSEvent) {
+        switch Int(event.keyCode) {
+        case kVK_LeftArrow:
+            selectUsageTip(offset: -1)
+        case kVK_RightArrow:
+            selectUsageTip(offset: 1)
+        default:
+            super.keyDown(with: event)
+        }
+    }
 
     override func scrollWheel(with event: NSEvent) {
         detailScrollView.scrollWheel(with: event)
@@ -721,21 +936,78 @@
 
     override func layout() {
         super.layout()
-        let titleWidth = min(320, max(240, bounds.width * 0.24))
-        let controlsWidth: CGFloat = 120
-        let detailWidth = max(1, bounds.width - titleWidth - controlsWidth)
+        let visualFrame = currentVisualFrame()
+        backgroundView.frame = visualFrame
 
-        titleBackgroundView.frame = NSRect(x: 0, y: 0, width: titleWidth, height: bounds.height)
-        titleLabel.frame = titleBackgroundView.bounds.insetBy(dx: 18, dy: 0)
-        detailScrollView.frame = NSRect(x: titleWidth, y: 0, width: detailWidth, height: bounds.height)
-        controlsView.frame = NSRect(x: titleWidth + detailWidth, y: 0, width: controlsWidth, height: bounds.height)
+        let paddingLeft: CGFloat = 22
+        let paddingRight: CGFloat = 16
+        let iconSize: CGFloat = 24
+        let iconTextGap: CGFloat = 10
+        let titleDetailGap: CGFloat = 22
+        let detailDotsGap: CGFloat = 24
+        let dotsButtonGap: CGFloat = 16
+        let buttonGap: CGFloat = 6
+        let buttonSize: CGFloat = 48
+        let dotsWidth = dotsView.preferredWidth
+        let fullTitleWidth = ceil(titleLabel.attributedStringValue.size().width)
 
-        let buttonSize: CGFloat = 34
-        let buttonY: CGFloat = 9
-        previousButton.frame = NSRect(x: 22, y: buttonY, width: buttonSize, height: buttonSize)
-        nextButton.frame = NSRect(x: 64, y: buttonY, width: buttonSize, height: buttonSize)
-        dotsView.frame = NSRect(x: 18, y: 48, width: controlsWidth - 36, height: 10)
+        let centerY = visualFrame.midY
+        iconView.frame = NSRect(
+            x: visualFrame.minX + paddingLeft,
+            y: centerY - iconSize / 2,
+            width: iconSize,
+            height: iconSize
+        )
 
+        let titleX = iconView.frame.maxX + iconTextGap
+        let buttonsWidth = buttonSize * 2 + buttonGap
+        let trailingWidth = paddingRight + buttonsWidth + dotsButtonGap + dotsWidth + detailDotsGap
+        let availableTextWidth = max(1, visualFrame.maxX - titleX - titleDetailGap - trailingWidth)
+        let minimumReadableDetailWidth: CGFloat = 220
+        let titleWidth: CGFloat
+        if availableTextWidth >= fullTitleWidth + minimumReadableDetailWidth {
+            titleWidth = fullTitleWidth
+        } else if availableTextWidth >= fullTitleWidth {
+            titleWidth = fullTitleWidth
+        } else {
+            titleWidth = max(1, availableTextWidth)
+        }
+
+        titleLabel.frame = NSRect(
+            x: titleX,
+            y: visualFrame.minY,
+            width: titleWidth,
+            height: visualFrame.height
+        )
+
+        let buttonY = centerY - buttonSize / 2
+        nextButton.frame = NSRect(
+            x: visualFrame.maxX - paddingRight - buttonSize,
+            y: buttonY,
+            width: buttonSize,
+            height: buttonSize
+        )
+        previousButton.frame = NSRect(
+            x: nextButton.frame.minX - buttonGap - buttonSize,
+            y: buttonY,
+            width: buttonSize,
+            height: buttonSize
+        )
+        dotsView.frame = NSRect(
+            x: previousButton.frame.minX - dotsButtonGap - dotsWidth,
+            y: centerY - 5,
+            width: dotsWidth,
+            height: 10
+        )
+
+        let detailX = titleLabel.frame.maxX + titleDetailGap
+        let detailRight = dotsView.frame.minX - detailDotsGap
+        detailScrollView.frame = NSRect(
+            x: detailX,
+            y: visualFrame.minY,
+            width: max(1, detailRight - detailX),
+            height: visualFrame.height
+        )
         layoutDetailLabel()
     }
 
@@ -753,12 +1025,13 @@
         let safeIndex = min(max(0, coordinator.selectedUsageTipIndex), coordinator.usageTips.count - 1)
         let tip = coordinator.usageTips[safeIndex]
         titleLabel.stringValue = tr(tip.titleKey)
-        detailLabel.stringValue = tr(tip.detailKey)
-        previousButton.accessibilityLabel = tr("usageTips.previous")
-        nextButton.accessibilityLabel = tr("usageTips.next")
+        detailLabel.stringValue = formattedTipDetail(tr(tip.detailKey))
+        previousButton.buttonAccessibilityLabel = tr("usageTips.previous")
+        nextButton.buttonAccessibilityLabel = tr("usageTips.next")
         dotsView.configure(count: coordinator.usageTips.count, selectedIndex: safeIndex)
         updateColors()
-        layoutDetailLabel()
+        needsLayout = true
+        enclosingHostView?.relayoutUsageTipsAfterContentChange()
     }
 
     func clearHoverState() {
@@ -766,29 +1039,50 @@
         setPointerInside(false)
     }
 
+    func configureVisualLayout(width: CGFloat, height: CGFloat, bottomMargin: CGFloat) {
+        visualWidth = max(1, width)
+        visualHeight = max(1, height)
+        visualBottomMargin = max(0, bottomMargin)
+        needsLayout = true
+    }
+
+    func preferredWidth(maxAvailableWidth: CGFloat) -> CGFloat {
+        let padding: CGFloat = 22 + 16
+        let fixedWidth: CGFloat = 24 + 10 + 22 + 24 + 16 + 48 + 6 + 48
+        let dotsWidth = dotsView.preferredWidth
+        let titleWidth = ceil(titleLabel.attributedStringValue.size().width)
+        let detailWidth = ceil(detailLabel.attributedStringValue.size().width)
+        let contentWidth = padding + fixedWidth + dotsWidth + titleWidth + detailWidth
+        let preferredWidth = max(AppGridUsageTipsMetrics.minWidth, contentWidth)
+        return min(maxAvailableWidth, preferredWidth)
+    }
+
     private func setup() {
         wantsLayer = true
-        layer?.cornerRadius = 8
-        layer?.masksToBounds = true
+        layer?.shadowColor = NSColor.black.cgColor
+        layer?.shadowOpacity = 0.14
+        layer?.shadowRadius = 12
+        layer?.shadowOffset = NSSize(width: 0, height: -2)
 
-        titleBackgroundView.wantsLayer = true
-        controlsView.wantsLayer = true
+        backgroundView.material = .popover
+        backgroundView.blendingMode = .withinWindow
+        backgroundView.state = .active
+        backgroundView.wantsLayer = true
+        backgroundView.layer?.cornerRadius = 10
+        backgroundView.layer?.masksToBounds = true
+        backgroundView.layer?.borderWidth = 1
+        addSubview(backgroundView)
 
-        titleLabel.isEditable = false
-        titleLabel.isSelectable = false
-        titleLabel.drawsBackground = false
-        titleLabel.isBordered = false
-        titleLabel.lineBreakMode = .byTruncatingTail
-        titleLabel.maximumNumberOfLines = 1
-        titleLabel.font = NSFont.systemFont(ofSize: 24, weight: .bold)
+        let iconConfig = NSImage.SymbolConfiguration(pointSize: 24, weight: .semibold)
+        iconView.image = NSImage(
+            systemSymbolName: "lightbulb.fill",
+            accessibilityDescription: nil
+        )?.withSymbolConfiguration(iconConfig)
+        iconView.imageScaling = .scaleProportionallyDown
+        addSubview(iconView)
 
-        detailLabel.isEditable = false
-        detailLabel.isSelectable = false
-        detailLabel.drawsBackground = false
-        detailLabel.isBordered = false
-        detailLabel.lineBreakMode = .byClipping
-        detailLabel.maximumNumberOfLines = 1
-        detailLabel.font = NSFont.systemFont(ofSize: 24, weight: .bold)
+        configureLabel(titleLabel, font: titleFont, lineBreakMode: .byClipping)
+        configureLabel(detailLabel, font: detailFont, lineBreakMode: .byClipping)
 
         detailScrollView.drawsBackground = false
         detailScrollView.hasVerticalScroller = false
@@ -800,21 +1094,70 @@
         previousButton.action = { [weak self] in self?.selectUsageTip(offset: -1) }
         nextButton.action = { [weak self] in self?.selectUsageTip(offset: 1) }
 
-        addSubview(titleBackgroundView)
-        titleBackgroundView.addSubview(titleLabel)
+        addSubview(titleLabel)
         addSubview(detailScrollView)
-        addSubview(controlsView)
-        controlsView.addSubview(previousButton)
-        controlsView.addSubview(nextButton)
-        controlsView.addSubview(dotsView)
+        addSubview(dotsView)
+        addSubview(previousButton)
+        addSubview(nextButton)
 
         setAccessibilityRole(.group)
         updateColors()
     }
 
+    private func configureLabel(_ label: NSTextField, font: NSFont, lineBreakMode: NSLineBreakMode) {
+        label.cell = AppGridCenteredTextFieldCell(textCell: "")
+        label.isEditable = false
+        label.isSelectable = false
+        label.drawsBackground = false
+        label.isBordered = false
+        label.lineBreakMode = lineBreakMode
+        label.maximumNumberOfLines = 1
+        label.font = font
+    }
+
+    private func claimInteractionFocus() {
+        setPointerInside(true)
+        window?.makeFirstResponder(self)
+    }
+
+    func handleMouseEventFromHost(_ event: NSEvent, triggerButtons: Bool) -> Bool {
+        let point = usageTipsPoint(for: event)
+        guard bounds.contains(point) else { return false }
+        if triggerButtons, routeButtonClickIfNeeded(event) {
+            return true
+        }
+        claimInteractionFocus()
+        return true
+    }
+
     private func selectUsageTip(offset: Int) {
         coordinator?.selectUsageTip(offset: offset)
         applyCoordinatorState()
+    }
+
+    private func routeButtonClickIfNeeded(_ event: NSEvent) -> Bool {
+        let point = usageTipsPoint(for: event)
+        let hitOutset: CGFloat = 24
+        if nextButton.frame.insetBy(dx: -hitOutset, dy: -hitOutset).contains(point) {
+            Diagnostics.log("usageTips.hud.routedNext")
+            selectUsageTip(offset: 1)
+            return true
+        }
+        if previousButton.frame.insetBy(dx: -hitOutset, dy: -hitOutset).contains(point) {
+            Diagnostics.log("usageTips.hud.routedPrevious")
+            selectUsageTip(offset: -1)
+            return true
+        }
+        return false
+    }
+
+    private func usageTipsPoint(for event: NSEvent) -> NSPoint {
+        if event.window === window {
+            return convert(event.locationInWindow, from: nil)
+        }
+        guard let window else { return .zero }
+        let windowPoint = window.convertPoint(fromScreen: NSEvent.mouseLocation)
+        return convert(windowPoint, from: nil)
     }
 
     private func setPointerInside(_ inside: Bool) {
@@ -839,35 +1182,79 @@
 
     private func layoutDetailLabel() {
         let textWidth = detailLabel.attributedStringValue.size().width
-        let width = max(detailScrollView.contentView.bounds.width, ceil(textWidth) + 36)
-        detailLabel.frame = NSRect(x: 18, y: 0, width: width, height: bounds.height)
+        let width = max(detailScrollView.contentView.bounds.width, ceil(textWidth) + 18)
+        detailLabel.frame = NSRect(x: 0, y: 0, width: width, height: detailScrollView.bounds.height)
+    }
+
+    private func currentVisualFrame() -> NSRect {
+        let width = min(bounds.width, visualWidth)
+        let height = min(bounds.height, visualHeight)
+        return NSRect(
+            x: max(0, (bounds.width - width) / 2),
+            y: max(0, bounds.height - visualBottomMargin - height),
+            width: width,
+            height: height
+        )
+    }
+
+    private func formattedTipDetail(_ text: String) -> String {
+        text
+            .replacingOccurrences(of: " > ", with: " -> ")
+            .replacingOccurrences(of: ">", with: "->")
     }
 
     private func updateColors() {
-        layer?.backgroundColor = NSColor.black.withAlphaComponent(0.88).cgColor
-        layer?.borderColor = NSColor.labelColor.withAlphaComponent(0.18).cgColor
-        layer?.borderWidth = 1
-        titleBackgroundView.layer?.backgroundColor = NSColor.controlBackgroundColor.withAlphaComponent(0.96).cgColor
-        controlsView.layer?.backgroundColor = NSColor.black.withAlphaComponent(0.88).cgColor
-        titleLabel.textColor = .labelColor
-        detailLabel.textColor = NSColor.white.withAlphaComponent(0.96)
+        backgroundView.layer?.borderColor = NSColor.separatorColor.withAlphaComponent(0.35).cgColor
+        iconView.contentTintColor = .systemYellow
+        titleLabel.textColor = .secondaryLabelColor
+        detailLabel.textColor = .labelColor
+        previousButton.tintColor = .labelColor
+        nextButton.tintColor = .labelColor
+        dotsView.needsDisplay = true
+    }
+}
+
+private final class AppGridCenteredTextFieldCell: NSTextFieldCell {
+    override func drawingRect(forBounds rect: NSRect) -> NSRect {
+        var drawingRect = super.drawingRect(forBounds: rect)
+        let textHeight = cellSize(forBounds: rect).height
+        drawingRect.origin.y = rect.origin.y + max(0, (rect.height - textHeight) / 2)
+        drawingRect.size.height = min(rect.height, textHeight + 2)
+        return drawingRect
+    }
+}
+
+private final class AppGridDecorativeImageView: NSImageView {
+    override func hitTest(_ point: NSPoint) -> NSView? {
+        nil
+    }
+
+    override func isAccessibilityElement() -> Bool {
+        false
     }
 }
 
 private final class AppGridUsageTipIconButton: NSView {
     var action: (() -> Void)?
-    var accessibilityLabel: String = "" {
+    var buttonAccessibilityLabel: String = "" {
         didSet {
-            setAccessibilityLabel(accessibilityLabel)
+            setAccessibilityLabel(buttonAccessibilityLabel)
+        }
+    }
+    var tintColor: NSColor = .labelColor {
+        didSet {
+            imageView.contentTintColor = tintColor
         }
     }
 
-    private let imageView = NSImageView()
+    private let imageView = AppGridDecorativeImageView()
     private var trackingAreaRef: NSTrackingArea?
     private var isHovered = false
+    private var isPressed = false
 
     override var isFlipped: Bool { true }
     override var acceptsFirstResponder: Bool { false }
+    override var mouseDownCanMoveWindow: Bool { false }
 
     init(systemImage: String) {
         super.init(frame: .zero)
@@ -876,9 +1263,30 @@
 
     required init?(coder: NSCoder) { fatalError() }
 
+    override func acceptsFirstMouse(for event: NSEvent?) -> Bool {
+        true
+    }
+
+    override func isAccessibilityElement() -> Bool {
+        true
+    }
+
+    override func accessibilityRole() -> NSAccessibility.Role? {
+        .button
+    }
+
+    override func accessibilityLabel() -> String? {
+        buttonAccessibilityLabel
+    }
+
+    override func accessibilityPerformPress() -> Bool {
+        action?()
+        return true
+    }
+
     override func layout() {
         super.layout()
-        let size: CGFloat = 24
+        let size: CGFloat = 26
         imageView.frame = NSRect(
             x: (bounds.width - size) / 2,
             y: (bounds.height - size) / 2,
@@ -913,28 +1321,38 @@
 
     override func mouseExited(with event: NSEvent) {
         isHovered = false
+        isPressed = false
         needsDisplay = true
     }
 
     override func mouseDown(with event: NSEvent) {
+        Diagnostics.log("usageTips.button.mouseDown", [
+            "label": buttonAccessibilityLabel
+        ])
+        isPressed = true
+        needsDisplay = true
         action?()
+        DispatchQueue.main.asyncAfter(deadline: .now() + 0.10) { [weak self] in
+            self?.isPressed = false
+            self?.needsDisplay = true
+        }
     }
 
     override func draw(_ dirtyRect: NSRect) {
-        guard isHovered else { return }
-        NSColor.white.withAlphaComponent(0.12).setFill()
-        NSBezierPath(roundedRect: bounds.insetBy(dx: 1, dy: 1), xRadius: 7, yRadius: 7).fill()
+        guard isHovered || isPressed else { return }
+        tintColor.withAlphaComponent(isPressed ? 0.14 : 0.08).setFill()
+        NSBezierPath(roundedRect: bounds.insetBy(dx: 1, dy: 1), xRadius: 6, yRadius: 6).fill()
     }
 
     private func setup(systemImage: String) {
         wantsLayer = true
-        let config = NSImage.SymbolConfiguration(pointSize: 24, weight: .bold)
+        let config = NSImage.SymbolConfiguration(pointSize: 26, weight: .semibold)
         imageView.image = NSImage(
             systemSymbolName: systemImage,
             accessibilityDescription: nil
         )?.withSymbolConfiguration(config)
         imageView.imageScaling = .scaleProportionallyDown
-        imageView.contentTintColor = .white
+        imageView.contentTintColor = tintColor
         addSubview(imageView)
         setAccessibilityRole(.button)
     }
@@ -946,6 +1364,11 @@
 
     override var isFlipped: Bool { true }
 
+    var preferredWidth: CGFloat {
+        guard count > 0 else { return 0 }
+        return CGFloat(count) * 5 + CGFloat(max(0, count - 1)) * 5 + 2
+    }
+
     func configure(count: Int, selectedIndex: Int) {
         self.count = count
         self.selectedIndex = selectedIndex
@@ -954,21 +1377,25 @@
 
     override func draw(_ dirtyRect: NSRect) {
         guard count > 0 else { return }
-        let dotSize: CGFloat = 5
         let spacing: CGFloat = 5
-        let totalWidth = CGFloat(count) * dotSize + CGFloat(max(0, count - 1)) * spacing
+        let totalWidth = preferredWidth
         var x = (bounds.width - totalWidth) / 2
-        let y = (bounds.height - dotSize) / 2
+        let centerY = bounds.midY
 
         for index in 0..<count {
-            let color = index == selectedIndex
-                ? NSColor.controlAccentColor
-                : NSColor.white.withAlphaComponent(0.58)
+            let selected = index == selectedIndex
+            let dotSize: CGFloat = selected ? 6 : 5
+            let color = NSColor.labelColor.withAlphaComponent(selected ? 0.85 : 0.28)
             color.setFill()
             NSBezierPath(
-                ovalIn: NSRect(x: x, y: y, width: dotSize, height: dotSize)
+                ovalIn: NSRect(
+                    x: x,
+                    y: centerY - dotSize / 2,
+                    width: dotSize,
+                    height: dotSize
+                )
             ).fill()
-            x += dotSize + spacing
+            x += 5 + spacing
         }
     }
 }
diff --git a/src/Apptag/ApptagApp.swift b/src/Apptag/ApptagApp.swift
index beb61cb..e4efd6d 100644
--- a/src/Apptag/ApptagApp.swift
+++ b/src/Apptag/ApptagApp.swift
@@ -1751,7 +1751,13 @@
             super.mouseDown(with: event)
             return
         }
+        if routeUsageTipsMouseDownIfNeeded(event) {
+            return
+        }
         if hit == self {
+            if shouldSwallowUsageTipsBackdropClick(at: location) {
+                return
+            }
             if quickSearchSuppressesBackdropDismiss {
                 NotificationCenter.default.post(
                     name: .tagLauncherQuickSearchDismissRequested,
@@ -1786,6 +1792,32 @@
         super.mouseDown(with: event)
     }
 
+    private func routeUsageTipsMouseDownIfNeeded(_ event: NSEvent) -> Bool {
+        guard let appGridHost = findAppGridCollectionHost(in: self) else { return false }
+        return appGridHost.handleUsageTipsMouseDown(event)
+    }
+
+    private func findAppGridCollectionHost(in view: NSView) -> AppGridCollectionHostView? {
+        if let host = view as? AppGridCollectionHostView {
+            return host
+        }
+        for subview in view.subviews {
+            if let host = findAppGridCollectionHost(in: subview) {
+                return host
+            }
+        }
+        return nil
+    }
+
+    private func shouldSwallowUsageTipsBackdropClick(at location: NSPoint) -> Bool {
+        guard !UserDefaults.standard.bool(forKey: "hideUsageTips") else { return false }
+        let height = min(bounds.height, AppGridUsageTipsMetrics.reservedHeight)
+        guard height > 0 else { return false }
+        let y = isFlipped ? max(0, bounds.height - height) : 0
+        let region = NSRect(x: 0, y: y, width: bounds.width, height: height)
+        return region.contains(location)
+    }
+
     private func observeBackdropDismissSuppressionChanges() {
         modalInteractionObserver = NotificationCenter.default.addObserver(
             forName: .tagLauncherModalInteractionChanged,
diff --git a/src/Apptag/OverlayWindowController.swift b/src/Apptag/OverlayWindowController.swift
index 5ca9317..d259dcf 100644
--- a/src/Apptag/OverlayWindowController.swift
+++ b/src/Apptag/OverlayWindowController.swift
@@ -180,6 +180,12 @@
 
     func hide(force: Bool = false, discardWindow: Bool = false) {
         guard force || dependencies.canHideOverlay() else { return }
+        Diagnostics.log("overlay.hide", [
+            "force": force,
+            "discardWindow": discardWindow,
+            "hasWindow": window != nil,
+            "isVisible": window?.isVisible == true
+        ])
         generation &+= 1
         dependencies.onWillHide()
         if let settingsWindow = dependencies.settingsWindow(), settingsWindow.parent == window {
diff --git a/src/Scripts/usage_tips_qa.sh b/src/Scripts/usage_tips_qa.sh
index 7b5b0e8..ac03213 100755
--- a/src/Scripts/usage_tips_qa.sh
+++ b/src/Scripts/usage_tips_qa.sh
@@ -4,6 +4,7 @@
 ROOT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
 CONTENT_VIEW_SWIFT="$ROOT_DIR/Apptag/ContentView.swift"
 APP_GRID_SWIFT="$ROOT_DIR/Apptag/AppGridCollectionView.swift"
+APPTAG_APP_SWIFT="$ROOT_DIR/Apptag/ApptagApp.swift"
 PREFERENCES_VIEW_SWIFT="$ROOT_DIR/Apptag/PreferencesView.swift"
 APP_DEFAULTS_SWIFT="$ROOT_DIR/Apptag/AppDefaults.swift"
 LOCALIZATION_DIR="$ROOT_DIR/Apptag/Localization"
@@ -15,11 +16,12 @@
 
 [[ -f "$CONTENT_VIEW_SWIFT" ]] || fail "missing ContentView.swift"
 [[ -f "$APP_GRID_SWIFT" ]] || fail "missing AppGridCollectionView.swift"
+[[ -f "$APPTAG_APP_SWIFT" ]] || fail "missing ApptagApp.swift"
 [[ -f "$PREFERENCES_VIEW_SWIFT" ]] || fail "missing PreferencesView.swift"
 [[ -f "$APP_DEFAULTS_SWIFT" ]] || fail "missing AppDefaults.swift"
 [[ -d "$LOCALIZATION_DIR" ]] || fail "missing Localization directory"
 
-python3 - "$CONTENT_VIEW_SWIFT" "$APP_GRID_SWIFT" "$PREFERENCES_VIEW_SWIFT" "$APP_DEFAULTS_SWIFT" "$LOCALIZATION_DIR" <<'PY'
+python3 - "$CONTENT_VIEW_SWIFT" "$APP_GRID_SWIFT" "$APPTAG_APP_SWIFT" "$PREFERENCES_VIEW_SWIFT" "$APP_DEFAULTS_SWIFT" "$LOCALIZATION_DIR" <<'PY'
 import json
 import pathlib
 import re
@@ -27,9 +29,10 @@
 
 content_view = pathlib.Path(sys.argv[1]).read_text(encoding="utf-8")
 app_grid = pathlib.Path(sys.argv[2]).read_text(encoding="utf-8")
-preferences = pathlib.Path(sys.argv[3]).read_text(encoding="utf-8")
-defaults = pathlib.Path(sys.argv[4]).read_text(encoding="utf-8")
-localization_dir = pathlib.Path(sys.argv[5])
+apptag_app = pathlib.Path(sys.argv[3]).read_text(encoding="utf-8")
+preferences = pathlib.Path(sys.argv[4]).read_text(encoding="utf-8")
+defaults = pathlib.Path(sys.argv[5]).read_text(encoding="utf-8")
+localization_dir = pathlib.Path(sys.argv[6])
 
 required_keys = [
     "settings.hideUsageTips",
@@ -83,17 +86,61 @@
     "Usage tips must be implemented as a native AppKit NSView",
 )
 require(
-    r"enum\s+AppGridUsageTipsMetrics\s*\{(?P<body>.*?)static\s+let\s+reservedHeight\s*:\s*CGFloat\s*=\s*104",
+    r"enum\s+AppGridUsageTipsMetrics\s*\{(?P<body>.*?)static\s+let\s+reservedHeight\s*:\s*CGFloat\s*=\s*128",
     app_grid,
-    "Usage tips overlay must reserve stable bottom space for the larger native bar",
+    "Usage tips overlay must reserve stable bottom space for the native HUD bar",
+)
+require(
+    r"NSVisualEffectView\s*\(",
+    app_grid,
+    "Usage tips must use a native macOS visual effect surface instead of split black/white blocks",
+)
+require(
+    r'systemSymbolName\s*:\s*"lightbulb\.fill"',
+    app_grid,
+    "Usage tips HUD must include a compact native guidance icon",
+)
+require(
+    r"preferredWidth\s*\(\s*maxAvailableWidth\s*:\s*CGFloat\s*\)",
+    app_grid,
+    "Usage tips HUD must be content-adaptive instead of stretched across the full AppGrid",
+)
+if re.search(r"static\s+let\s+maxWidth\s*:\s*CGFloat", app_grid):
+    fail("Usage tips HUD must not use a hard maximum width that truncates localized titles")
+require(
+    r"fullTitleWidth\s*=\s*ceil\s*\(\s*titleLabel\.attributedStringValue\.size\(\)\.width\s*\)",
+    app_grid,
+    "Usage tips layout must measure the localized title width instead of using a fixed title column",
+)
+require(
+    r"configureLabel\s*\(\s*titleLabel\s*,\s*font\s*:\s*titleFont\s*,\s*lineBreakMode\s*:\s*\.byClipping\s*\)",
+    app_grid,
+    "Usage tip titles must not use tail truncation ellipses",
+)
+if re.search(r"configureLabel\s*\(\s*titleLabel\s*,\s*font\s*:\s*titleFont\s*,\s*lineBreakMode\s*:\s*\.byTruncatingTail\s*\)", app_grid):
+    fail("Usage tip titles must not be configured with byTruncatingTail")
+require(
+    r"relayoutUsageTipsAfterContentChange\s*\(\s*\)",
+    app_grid,
+    "Usage tips must ask the host to recompute width after localized text changes",
+)
+require(
+    r"availableTextWidth\s*=\s*max\s*\(\s*1\s*,\s*visualFrame\.maxX\s*-\s*titleX\s*-\s*titleDetailGap\s*-\s*trailingWidth\s*\)",
+    app_grid,
+    "Usage tips layout must allocate text from actual available AppGrid width",
+)
+require(
+    r"return\s+min\s*\(\s*maxAvailableWidth\s*,\s*preferredWidth\s*\)",
+    app_grid,
+    "Usage tips preferred width must expand up to available AppGrid width for long localizations",
 )
 require(
     r"detailScrollView\.hasHorizontalScroller\s*=\s*true",
     app_grid,
     "Long localized tip text must be horizontally scrollable in the native AppKit bar",
 )
-if len(re.findall(r"NSFont\.systemFont\s*\(\s*ofSize\s*:\s*24\s*,\s*weight\s*:\s*\.bold\s*\)", app_grid)) < 2:
-    fail("Usage tip title/detail fonts must use the larger 24pt native AppKit style")
+if len(re.findall(r"NSFont\.systemFont\s*\(\s*ofSize\s*:\s*24\s*,\s*weight\s*:\s*\.(?:semibold|regular)\s*\)", app_grid)) < 2:
+    fail("Usage tip title/detail fonts must use readable 24pt native HUD typography")
 require(
     r"override\s+func\s+scrollWheel\s*\(\s*with\s+event\s*:\s*NSEvent\s*\)\s*\{\s*detailScrollView\.scrollWheel\s*\(\s*with\s*:\s*event\s*\)",
     app_grid,
@@ -120,6 +167,103 @@
     "Native usage tips bar must own hit testing so clicks do not fall through to AppGrid",
 )
 require(
+    r"override\s+func\s+hitTest\s*\(\s*_\s+point\s*:\s*NSPoint\s*\)\s*->\s*NSView\?\s*\{(?P<body>.*?)usageTipsView\.frame\.contains\s*\(\s*point\s*\)",
+    app_grid,
+    "AppGrid host must prioritize the native usage tips hit-test region above the collection view",
+)
+require(
+    r"usageTipsEventRegion\s*\(\s*\)\s*->\s*NSRect",
+    app_grid,
+    "AppGrid host must reserve a full bottom event region for tips so clicks cannot pass through",
+)
+require(
+    r"private\s+final\s+class\s+AppGridUsageTipsShieldView\s*:\s*NSView\b",
+    app_grid,
+    "AppGrid must use a native transparent shield view for the full bottom tips event region",
+)
+require(
+    r"usageTipsShieldView\.frame\s*=\s*usageTipsEventRegion\s*\(\s*\)",
+    app_grid,
+    "Usage tips shield must cover the full bottom event region, not just the visible HUD",
+)
+require(
+    r"usageTipsView\.frame\s*=\s*usageTipsEventRegion\s*\(\s*\)",
+    app_grid,
+    "Usage tips HUD hit-test view itself must cover the full bottom event region",
+)
+require(
+    r"configureVisualLayout\s*\(\s*width\s*:\s*CGFloat\s*,\s*height\s*:\s*CGFloat\s*,\s*bottomMargin\s*:\s*CGFloat\s*\)",
+    app_grid,
+    "Usage tips must separate full hit-test coverage from the centered visual HUD frame",
+)
+require(
+    r"currentVisualFrame\s*\(\s*\)\s*->\s*NSRect",
+    app_grid,
+    "Usage tips must compute a centered visual frame inside the full bottom hit-test region",
+)
+require(
+    r"addSubview\s*\(\s*usageTipsShieldView\s*,\s*positioned\s*:\s*\.above\s*,\s*relativeTo\s*:\s*scrollView\s*\)",
+    app_grid,
+    "Usage tips shield must sit above the AppGrid collection scroll view",
+)
+require(
+    r"addSubview\s*\(\s*usageTipsView\s*,\s*positioned\s*:\s*\.above\s*,\s*relativeTo\s*:\s*usageTipsShieldView\s*\)",
+    app_grid,
+    "Visible usage tips HUD must sit above the transparent event shield",
+)
+require(
+    r"claimUsageTipsEventRegion\s*\(\s*\)",
+    app_grid,
+    "AppGrid host must claim bottom tips events and suppress lower bubbles",
+)
+require(
+    r"handleUsageTipsMouseDown\s*\(\s*_\s+event\s*:\s*NSEvent\s*\)\s*->\s*Bool",
+    app_grid,
+    "AppGrid host must expose a native AppKit event router for usage tips clicks",
+)
+require(
+    r"addLocalMonitorForEvents\s*\(\s*matching\s*:\s*\[(?P<body>.*?)\.leftMouseDown(?P<body2>.*?)\.leftMouseUp(?P<body3>.*?)\.rightMouseDown(?P<body4>.*?)\.otherMouseUp",
+    app_grid,
+    "AppGrid host must intercept usage tips mouseDown/mouseUp events before NSCollectionView app items receive them",
+)
+require(
+    r"\.leftMouseUp(?P<body>.*?)\.rightMouseUp(?P<body2>.*?)\.otherMouseUp",
+    app_grid,
+    "AppGrid host must also swallow mouseUp events in the usage tips region so app icons below cannot open on release",
+)
+require(
+    r"triggerButtons\s*:\s*event\.type\s*==\s*\.leftMouseDown",
+    app_grid,
+    "Usage tips monitor must only trigger paging on left mouseDown, not on mouseUp or right/other clicks",
+)
+require(
+    r"usageTipsHostPoint\s*\(\s*for\s+event\s*:\s*NSEvent\s*\)\s*->\s*NSPoint",
+    app_grid,
+    "Usage tips mouse monitor must resolve the event position through the AppGrid host",
+)
+require(
+    r"window\.convertPoint\s*\(\s*fromScreen\s*:\s*NSEvent\.mouseLocation\s*\)",
+    app_grid,
+    "Usage tips hit testing must fall back to current screen mouse location when event.window is unreliable",
+)
+require(
+    r"self\.handleUsageTipsMouseEvent\s*\(\s*event\s*,(?P<body>.*?)triggerButtons\s*:\s*event\.type\s*==\s*\.leftMouseDown(?P<body2>.*?)return\s+nil",
+    app_grid,
+    "Usage tips mouse monitor must swallow handled bottom-tip events so app icons below cannot open",
+)
+require(
+    r"removeUsageTipsMouseMonitor\s*\(\s*\)",
+    app_grid,
+    "Usage tips mouse monitor must be removed when the AppGrid host leaves its window",
+)
+require(
+    r"func\s+handleMouseEventFromHost\s*\(\s*_\s+event\s*:\s*NSEvent\s*,\s*triggerButtons\s*:\s*Bool\s*\)\s*->\s*Bool\s*\{(?P<body>.*?)if\s+triggerButtons\s*,\s*routeButtonClickIfNeeded\s*\(\s*event\s*\)(?P<body2>.*?)claimInteractionFocus\s*\(\s*\)(?P<body3>.*?)return\s+true",
+    app_grid,
+    "Usage tips host-routed clicks must only trigger page changes on arrow hit regions and otherwise only consume the event",
+)
+if re.search(r"handleMouseEventFromHost\s*\(\s*_\s+event\s*:\s*NSEvent\s*,\s*triggerButtons\s*:\s*Bool\s*\)\s*->\s*Bool\s*\{(?P<body>.*?)target\.mouseDown", app_grid, re.S):
+    fail("Usage tips host-routed clicks must not redispatch arbitrary mouseDown events that can pierce to app icons")
+require(
     r"override\s+func\s+mouseDown\s*\(\s*with\s+event\s*:\s*NSEvent\s*\)",
     app_grid,
     "Native usage tips bar must swallow mouseDown events instead of letting clicks close the grid",
@@ -128,6 +272,36 @@
     r"private\s+final\s+class\s+AppGridUsageTipIconButton\s*:\s*NSView\b",
     app_grid,
     "Usage tip navigation controls must be native AppKit hit-testable views",
+)
+require(
+    r"private\s+final\s+class\s+AppGridDecorativeImageView\s*:\s*NSImageView\b(?P<body>.*?)override\s+func\s+hitTest\s*\(\s*_\s+point\s*:\s*NSPoint\s*\)\s*->\s*NSView\?\s*\{\s*nil\s*\}",
+    app_grid,
+    "Usage tip icon images must not steal hit testing from their parent AppKit controls",
+)
+require(
+    r"private\s+final\s+class\s+AppGridUsageTipIconButton\s*:\s*NSView\b(?P<body>.*?)acceptsFirstMouse\s*\(\s*for\s+event\s*:\s*NSEvent\?\s*\)\s*->\s*Bool\s*\{\s*true\s*\}",
+    app_grid,
+    "Usage tip navigation controls must accept first mouse clicks in the floating overlay",
+)
+require(
+    r"override\s+func\s+isAccessibilityElement\s*\(\s*\)\s*->\s*Bool\s*\{\s*true\s*\}",
+    app_grid,
+    "Usage tip navigation controls must be exposed as accessibility elements",
+)
+require(
+    r"override\s+func\s+accessibilityRole\s*\(\s*\)\s*->\s*NSAccessibility\.Role\?\s*\{\s*\.button\s*\}",
+    app_grid,
+    "Usage tip navigation controls must expose the AX button role",
+)
+require(
+    r"override\s+func\s+accessibilityPerformPress\s*\(\s*\)\s*->\s*Bool\s*\{(?P<body>.*?)action\?\(\)(?P<body2>.*?)return\s+true",
+    app_grid,
+    "Usage tip navigation controls must support AX press actions",
+)
+require(
+    r"override\s+var\s+mouseDownCanMoveWindow\s*:\s*Bool\s*\{\s*false\s*\}",
+    app_grid,
+    "Usage tips hit-test views must not let mouseDown move or dismiss the overlay window",
 )
 require(
     r"func\s+selectUsageTip\s*\(\s*offset\s*:\s*Int\s*\)",
@@ -145,7 +319,7 @@
     "Next usage tip control must call the native selection handler",
 )
 require(
-    r"override\s+func\s+mouseDown\s*\(\s*with\s+event\s*:\s*NSEvent\s*\)\s*\{\s*action\?\(\)\s*\}",
+    r"override\s+func\s+mouseDown\s*\(\s*with\s+event\s*:\s*NSEvent\s*\)\s*\{(?P<body>.*?)action\?\(\)",
     app_grid,
     "Native usage tip icon buttons must invoke their action directly on mouseDown",
 )
@@ -153,6 +327,16 @@
     r"onUsageTipIndexChange\s*\(\s*nextIndex\s*\)",
     app_grid,
     "Native usage tip selection must publish the new index back to SwiftUI state",
+)
+require(
+    r"override\s+func\s+keyDown\s*\(\s*with\s+event\s*:\s*NSEvent\s*\)\s*\{(?P<body>.*?)kVK_LeftArrow(?P<body2>.*?)kVK_RightArrow",
+    app_grid,
+    "Focused native usage tips HUD must support left/right arrow key switching",
+)
+require(
+    r"formattedTipDetail\s*\(_\s+text\s*:\s*String\s*\)",
+    app_grid,
+    "Usage tips detail text must normalize > separators to -> for display",
 )
 require(
     r"setUsageTipsBubbleDisabled\s*\(\s*inside\s*\)",
@@ -165,6 +349,31 @@
     "Hovering usage tips must notify ContentView to clear already visible SwiftUI bubbles",
 )
 require(
+    r"shouldSwallowUsageTipsBackdropClick\s*\(\s*at\s+location\s*:\s*NSPoint\s*\)\s*->\s*Bool",
+    apptag_app,
+    "DismissibleHostingView must not treat bottom usage tips clicks as backdrop taps",
+)
+require(
+    r"routeUsageTipsMouseDownIfNeeded\s*\(\s*event\s*\)",
+    apptag_app,
+    "DismissibleHostingView must forward bottom usage tips clicks to native AppKit controls before swallowing",
+)
+require(
+    r"findAppGridCollectionHost\s*\(\s*in\s+view\s*:\s*NSView\s*\)\s*->\s*AppGridCollectionHostView\?",
+    apptag_app,
+    "DismissibleHostingView must locate the native AppGrid host for usage tips event forwarding",
+)
+require(
+    r"AppGridUsageTipsMetrics\.reservedHeight",
+    apptag_app,
+    "Backdrop usage tips guard must match the native AppGrid reserved height",
+)
+require(
+    r'UserDefaults\.standard\.bool\s*\(\s*forKey\s*:\s*"hideUsageTips"\s*\)',
+    apptag_app,
+    "Backdrop usage tips guard must respect the hide usage tips setting",
+)
+require(
     r"private\s+func\s+handleUsageTipsHoverChange\s*\(\s*_\s+hovering\s*:\s*Bool\s*\)",
     content_view,
     "ContentView must clear existing app bubbles while the native usage tips bar is hovered",

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