From ae0f48a9d9543d43b120674f0e58164d7cce95ad Mon Sep 17 00:00:00 2001
From: Ariver <shanghai3168@gmail.com>
Date: Sun, 14 Jun 2026 21:06:22 +0800
Subject: [PATCH] Refine Quick Switch UI states

---
 C3.tools/round1-app-shelf-fixture-qa.sh                                        |   29 ++-
 C3.tools/round1-view-mode-entry-qa.sh                                          |  131 ++++++++++++++++++
 C1.source/Sources/Aligner/QuickSwitchRootView.swift                            |  199 ++++++++++++++++++---------
 C1.source/Resources/Aligner-Info.plist                                         |    4 
 C1.source/Tests/AlignerCoreTests/AlignerCoreTests.swift                        |    7 +
 C1.source/Sources/AlignerCore/Thumbnails/NativeSkeletonThumbnailProvider.swift |   15 +
 6 files changed, 293 insertions(+), 92 deletions(-)

diff --git a/C1.source/Resources/Aligner-Info.plist b/C1.source/Resources/Aligner-Info.plist
index f2b9d20..705b1be 100644
--- a/C1.source/Resources/Aligner-Info.plist
+++ b/C1.source/Resources/Aligner-Info.plist
@@ -17,9 +17,9 @@
 	<key>CFBundlePackageType</key>
 	<string>APPL</string>
 	<key>CFBundleShortVersionString</key>
-    <string>0.0.68</string>
+    <string>0.0.69</string>
 	<key>CFBundleVersion</key>
-    <string>20260614.1827</string>
+    <string>20260614.2031</string>
 	<key>LSMinimumSystemVersion</key>
 	<string>26.0</string>
 	<key>NSHighResolutionCapable</key>
diff --git a/C1.source/Sources/Aligner/QuickSwitchRootView.swift b/C1.source/Sources/Aligner/QuickSwitchRootView.swift
index 6675a87..9b47c99 100644
--- a/C1.source/Sources/Aligner/QuickSwitchRootView.swift
+++ b/C1.source/Sources/Aligner/QuickSwitchRootView.swift
@@ -52,6 +52,7 @@
     private var closeFeedback: CloseFeedback?
     private var closeFeedbackHideTask: Task<Void, Never>?
     private var isViewModeToggleButtonHovered = false
+    private var suppressViewModeToggleHoverPreview = false
     private var hoverTarget: HoverTarget = .none
     private var hoverTargetSource: HoverTargetSource = .event
     private var hoveredSpaceLaneID: UInt64?
@@ -308,6 +309,24 @@
         static let bottomMargin: CGFloat = 34
     }
 
+    private enum ViewModeToggleMetrics {
+        static let hitSize: CGFloat = 34
+        static let visualSize: CGFloat = 30
+        static let cornerRadius: CGFloat = 9
+        static let iconInset: CGFloat = 7
+        static let glyphLineWidth: CGFloat = 1.65
+        static let glyphCornerRadius: CGFloat = 2.1
+        static let selectedShadowRadius: CGFloat = 10
+        static let idleShadowRadius: CGFloat = 5
+    }
+
+    private enum ViewModeToggleVisualState: String {
+        case horizontalAvailable = "H1"
+        case horizontalSelected = "H2"
+        case verticalAvailable = "Z1"
+        case verticalSelected = "Z2"
+    }
+
     private enum WaterfallMetrics {
         static let gap: CGFloat = 16
         static let columnWidth: CGFloat = 252
@@ -485,8 +504,12 @@
         guard debugHoveredAppGroupIndex == nil else { return }
 
         let toggleHovered = viewModeToggleButtonContains(windowLocation: event.locationInWindow)
-        if isViewModeToggleButtonHovered != toggleHovered {
-            isViewModeToggleButtonHovered = toggleHovered
+        if !toggleHovered {
+            suppressViewModeToggleHoverPreview = false
+        }
+        let shouldShowToggleHoverPreview = toggleHovered && !suppressViewModeToggleHoverPreview
+        if isViewModeToggleButtonHovered != shouldShowToggleHoverPreview {
+            isViewModeToggleButtonHovered = shouldShowToggleHoverPreview
             needsLayout = true
         }
         if toggleHovered {
@@ -506,6 +529,7 @@
     override func mouseExited(with event: NSEvent) {
         guard debugHoveredAppGroupIndex == nil else { return }
         isViewModeToggleButtonHovered = false
+        suppressViewModeToggleHoverPreview = false
         hoveredCloseTarget = nil
         setHoverTarget(.none)
     }
@@ -1082,10 +1106,16 @@
             "spaceFilterActive": currentViewModel?.lockedSpaceID != nil,
             "viewModeToggleButtonVisible": !viewModeToggleButtonLayer.isHidden,
             "viewModeToggleButtonHovered": isViewModeToggleButtonHovered,
+            "viewModeToggleHoverPreviewSuppressed": suppressViewModeToggleHoverPreview,
             "viewModeToggleButtonFrame": dictionary(from: viewModeToggleButtonLayer.frame),
+            "viewModeToggleHitSize": Double(ViewModeToggleMetrics.hitSize),
+            "viewModeToggleVisualSize": Double(ViewModeToggleMetrics.visualSize),
             "viewModeToggleCurrentMode": waterfallViewMode.rawValue,
             "viewModeToggleTargetMode": nextWaterfallViewMode.rawValue,
             "viewModeToggleIconKind": viewModeToggleIconKind,
+            "viewModeToggleVisualState": viewModeToggleVisualState.rawValue,
+            "viewModeToggleStandardBlueColor": colorDictionary(from: viewModeToggleBlueColor.cgColor),
+            "viewModeToggleGlyphLineWidth": Double(ViewModeToggleMetrics.glyphLineWidth),
             "viewModeToggleAccessibilityLabel": viewModeToggleAccessibilityLabel,
             "settingsButtonVisible": false,
             "spaceFocusAppGroupIndexes": spaceFocusedAppGroupIndexes(),
@@ -1330,6 +1360,12 @@
         case "click-background":
             recordMouseCommand("click-background")
             _ = onBackgroundClick?()
+        case "hover-view-toggle":
+            recordMouseCommand("hover-view-toggle")
+            suppressViewModeToggleHoverPreview = false
+            isViewModeToggleButtonHovered = true
+            hoveredCloseTarget = nil
+            setHoverTarget(.none, source: .debug)
         case "click-view-toggle", "click-settings":
             recordMouseCommand("click-view-toggle")
             clickViewModeToggleButton(source: "debug")
@@ -2650,7 +2686,7 @@
     }
 
     private func layoutViewModeToggleButton() {
-        let size: CGFloat = 34
+        let size = ViewModeToggleMetrics.visualSize
         let topMargin = topSafeAreaInset + RootLayoutMetrics.topContentMargin
         let x = max(
             RootLayoutMetrics.horizontalMargin,
@@ -2661,16 +2697,23 @@
             glassLayer.bounds.height - topMargin - size
         )
         viewModeToggleButtonLayer.frame = CGRect(x: x, y: y, width: size, height: size)
-        viewModeToggleButtonLayer.backgroundColor = NSColor.windowBackgroundColor
-            .withAlphaComponent(isViewModeToggleButtonHovered ? 0.78 : 0.54)
-            .cgColor
-        viewModeToggleButtonLayer.borderColor = NSColor.separatorColor
-            .withAlphaComponent(isViewModeToggleButtonHovered ? 0.42 : 0.26)
-            .cgColor
-        viewModeToggleButtonLayer.shadowOpacity = isViewModeToggleButtonHovered ? 0.14 : 0.08
-        viewModeToggleButtonLayer.shadowRadius = isViewModeToggleButtonHovered ? 9 : 6
+        viewModeToggleButtonLayer.cornerRadius = ViewModeToggleMetrics.cornerRadius
+        let visualState = viewModeToggleVisualState
+        let isSelectedState = viewModeToggleVisualStateIsSelected(visualState)
+        viewModeToggleButtonLayer.backgroundColor = (isSelectedState
+            ? viewModeToggleBlueColor
+            : NSColor.windowBackgroundColor.withAlphaComponent(isViewModeToggleButtonHovered ? 0.76 : 0.58)
+        ).cgColor
+        viewModeToggleButtonLayer.borderColor = (isSelectedState
+            ? viewModeToggleBlueColor.withAlphaComponent(0.96)
+            : viewModeToggleBlueColor.withAlphaComponent(isViewModeToggleButtonHovered ? 0.72 : 0.34)
+        ).cgColor
+        viewModeToggleButtonLayer.shadowOpacity = isSelectedState ? 0.16 : (isViewModeToggleButtonHovered ? 0.11 : 0.06)
+        viewModeToggleButtonLayer.shadowRadius = isSelectedState
+            ? ViewModeToggleMetrics.selectedShadowRadius
+            : ViewModeToggleMetrics.idleShadowRadius
         viewModeToggleIconLayer.contentsScale = backingScaleFactor
-        let iconInset: CGFloat = 7
+        let iconInset = ViewModeToggleMetrics.iconInset
         viewModeToggleIconLayer.frame = viewModeToggleButtonLayer.bounds.insetBy(dx: iconInset, dy: iconInset)
         layoutViewModeToggleIcon()
     }
@@ -2686,39 +2729,28 @@
             return
         }
 
-        let activeStroke = (isViewModeToggleButtonHovered
-            ? NSColor.controlAccentColor
-            : NSColor.secondaryLabelColor
-        ).withAlphaComponent(isViewModeToggleButtonHovered ? 0.88 : 0.82)
-        let quietStroke = (isViewModeToggleButtonHovered
-            ? NSColor.controlAccentColor
-            : NSColor.secondaryLabelColor
-        ).withAlphaComponent(isViewModeToggleButtonHovered ? 0.34 : 0.24)
-        let subtleFill = (isViewModeToggleButtonHovered
-            ? NSColor.controlAccentColor
-            : NSColor.labelColor
-        ).withAlphaComponent(isViewModeToggleButtonHovered ? 0.06 : 0.025)
+        let visualState = viewModeToggleVisualState
+        let isSelectedState = viewModeToggleVisualStateIsSelected(visualState)
+        let strokeColor = isSelectedState
+            ? NSColor.white.withAlphaComponent(0.98)
+            : viewModeToggleBlueColor.withAlphaComponent(0.96)
+        let fillColor = isSelectedState
+            ? NSColor.white.withAlphaComponent(0.22)
+            : viewModeToggleBlueColor.withAlphaComponent(0.06)
+        let glyphRect = centeredSquare(in: bounds)
 
-        addViewModeToggleRoundedRect(
-            bounds.insetBy(dx: 0.65, dy: 0.65),
-            cornerRadius: 4.8,
-            strokeColor: quietStroke,
-            fillColor: NSColor.clear,
-            lineWidth: 1.05
-        )
-
-        switch nextWaterfallViewMode {
-        case .verticalColumns:
+        switch visualState {
+        case .verticalAvailable, .verticalSelected:
             addVerticalColumnsToggleGlyph(
-                in: bounds.insetBy(dx: 4.15, dy: 3.25),
-                strokeColor: activeStroke,
-                fillColor: subtleFill
+                in: glyphRect,
+                strokeColor: strokeColor,
+                fillColor: fillColor
             )
-        case .horizontalMasonry:
+        case .horizontalAvailable, .horizontalSelected:
             addHorizontalMasonryToggleGlyph(
-                in: bounds.insetBy(dx: 3.95, dy: 3.95),
-                strokeColor: activeStroke,
-                fillColor: subtleFill
+                in: glyphRect,
+                strokeColor: strokeColor,
+                fillColor: fillColor
             )
         }
 
@@ -2730,17 +2762,17 @@
         strokeColor: NSColor,
         fillColor: NSColor
     ) {
-        let columnWidth: CGFloat = 3.35
-        let gap = max(1.7, (rect.width - columnWidth * 3) / 2)
+        let columnWidth = rect.width * 0.22
+        let gap = (rect.width - columnWidth * 3) / 2
         for index in 0..<3 {
             let x = rect.minX + CGFloat(index) * (columnWidth + gap)
             let columnRect = CGRect(x: x, y: rect.minY, width: columnWidth, height: rect.height)
             addViewModeToggleRoundedRect(
                 columnRect,
-                cornerRadius: 1.6,
+                cornerRadius: ViewModeToggleMetrics.glyphCornerRadius,
                 strokeColor: strokeColor,
                 fillColor: fillColor,
-                lineWidth: 1.22
+                lineWidth: ViewModeToggleMetrics.glyphLineWidth
             )
         }
     }
@@ -2750,23 +2782,22 @@
         strokeColor: NSColor,
         fillColor: NSColor
     ) {
-        let cellSize: CGFloat = 3.65
-        let gapX = max(1.65, (rect.width - cellSize * 3) / 2)
-        let gapY = max(1.65, (rect.height - cellSize * 3) / 2)
-        for row in 0..<3 {
-            for column in 0..<3 {
+        let cellSize = rect.width * 0.38
+        let gap = rect.width - cellSize * 2
+        for row in 0..<2 {
+            for column in 0..<2 {
                 let cellRect = CGRect(
-                    x: rect.minX + CGFloat(column) * (cellSize + gapX),
-                    y: rect.minY + CGFloat(row) * (cellSize + gapY),
+                    x: rect.minX + CGFloat(column) * (cellSize + gap),
+                    y: rect.minY + CGFloat(row) * (cellSize + gap),
                     width: cellSize,
                     height: cellSize
                 )
                 addViewModeToggleRoundedRect(
                     cellRect,
-                    cornerRadius: 1.15,
+                    cornerRadius: ViewModeToggleMetrics.glyphCornerRadius,
                     strokeColor: strokeColor,
                     fillColor: fillColor,
-                    lineWidth: 1.18
+                    lineWidth: ViewModeToggleMetrics.glyphLineWidth
                 )
             }
         }
@@ -2793,6 +2824,16 @@
         layer.lineWidth = lineWidth
         layer.lineJoin = .round
         viewModeToggleIconLayer.addSublayer(layer)
+    }
+
+    private func centeredSquare(in rect: CGRect) -> CGRect {
+        let side = min(rect.width, rect.height)
+        return CGRect(
+            x: rect.midX - side / 2,
+            y: rect.midY - side / 2,
+            width: side,
+            height: side
+        )
     }
 
     private var topSafeAreaInset: CGFloat {
@@ -3150,7 +3191,10 @@
             x: locationInView.x - glassLayer.frame.minX,
             y: locationInView.y - glassLayer.frame.minY
         )
-        return viewModeToggleButtonLayer.frame.contains(locationInGlass)
+        let hitOutset = (ViewModeToggleMetrics.hitSize - ViewModeToggleMetrics.visualSize) / 2
+        return viewModeToggleButtonLayer.frame
+            .insetBy(dx: -hitOutset, dy: -hitOutset)
+            .contains(locationInGlass)
     }
 
     private func clickViewModeToggleButton(source: String) {
@@ -3163,6 +3207,8 @@
         if !mouseCommandsApplied.contains("click-view-toggle") {
             mouseCommandsApplied.append("click-view-toggle")
         }
+        isViewModeToggleButtonHovered = false
+        suppressViewModeToggleHoverPreview = true
         onToggleWaterfallViewMode?()
     }
 
@@ -3833,9 +3879,11 @@
             width: bounds.width,
             height: WaterfallMetrics.headerHeight
         )
-        column.headerLayer.backgroundColor = (isSpaceFocused
-            ? NSColor.systemFill.withAlphaComponent(0.10)
-            : NSColor.controlBackgroundColor.withAlphaComponent(0.52)
+        column.headerLayer.backgroundColor = (isHovered
+            ? viewModeToggleBlueColor
+            : (isSpaceFocused
+                ? NSColor.systemFill.withAlphaComponent(0.10)
+                : NSColor.controlBackgroundColor.withAlphaComponent(0.52))
         ).cgColor
         column.appNameLayer.frame = CGRect(
             x: WaterfallMetrics.columnHeaderTextInset,
@@ -3843,16 +3891,14 @@
             width: max(1, bounds.width - WaterfallMetrics.columnHeaderTextInset * 2),
             height: 16
         )
-        column.appNameLayer.foregroundColor = (isHovered
-            ? spaceLaneOccupiedColor
-            : NSColor.labelColor
-        ).cgColor
+        column.appNameLayer.foregroundColor = (isHovered ? NSColor.white : NSColor.labelColor).cgColor
         column.countLayer.frame = CGRect(
             x: bounds.width - 48,
             y: bounds.height - 24,
             width: 36,
             height: 16
         )
+        column.countLayer.foregroundColor = (isHovered ? NSColor.white : NSColor.secondaryLabelColor).cgColor
 
         let appGroupIndex = column.column.appGroupIndex
         let verticalOffset = clampedWaterfallColumnOffset(
@@ -4563,13 +4609,28 @@
         isHorizontalMasonryMode ? .verticalColumns : .horizontalMasonry
     }
 
-    private var viewModeToggleIconKind: String {
-        switch nextWaterfallViewMode {
-        case .verticalColumns:
-            return "verticalColumnsTarget"
-        case .horizontalMasonry:
-            return "horizontalMasonryTarget"
+    private var viewModeToggleBlueColor: NSColor {
+        NSColor(deviceRed: 135.0 / 255.0, green: 200.0 / 255.0, blue: 1, alpha: 1)
+    }
+
+    private var viewModeToggleVisualState: ViewModeToggleVisualState {
+        if isHorizontalMasonryMode {
+            return isViewModeToggleButtonHovered ? .verticalAvailable : .horizontalSelected
         }
+        return isViewModeToggleButtonHovered ? .horizontalAvailable : .verticalSelected
+    }
+
+    private func viewModeToggleVisualStateIsSelected(_ state: ViewModeToggleVisualState) -> Bool {
+        switch state {
+        case .horizontalSelected, .verticalSelected:
+            return true
+        case .horizontalAvailable, .verticalAvailable:
+            return false
+        }
+    }
+
+    private var viewModeToggleIconKind: String {
+        viewModeToggleVisualState.rawValue
     }
 
     private var viewModeToggleAccessibilityLabel: String {
@@ -5052,12 +5113,14 @@
                 "frame": dictionary(from: column.containerLayer.frame),
                 "visibleFrame": dictionary(from: visibleFrame),
                 "headerFrame": dictionary(from: column.headerLayer.frame),
+                "headerBackgroundColor": colorDictionary(from: column.headerLayer.backgroundColor),
                 "headerToFirstCardGap": headerToFirstCardGap.map(Double.init) ?? NSNull(),
                 "topToFirstCardGap": topToFirstCardGap.map(Double.init) ?? NSNull(),
                 "appNameFrame": dictionary(from: column.appNameLayer.frame),
                 "appNameAlignment": column.appNameLayer.alignmentMode.rawValue,
                 "appNameColor": colorDictionary(from: column.appNameLayer.foregroundColor),
                 "countFrame": dictionary(from: column.countLayer.frame),
+                "countColor": colorDictionary(from: column.countLayer.foregroundColor),
                 "verticalScrollOffset": Double(waterfallColumnScrollOffsets[appGroupIndex] ?? 0),
                 "maxVerticalScrollOffset": Double(waterfallMaxVerticalScrollOffset(for: appGroupIndex)),
                 "cards": waterfallCardReports(for: column)
diff --git a/C1.source/Sources/AlignerCore/Thumbnails/NativeSkeletonThumbnailProvider.swift b/C1.source/Sources/AlignerCore/Thumbnails/NativeSkeletonThumbnailProvider.swift
index bd9cad3..2cc724f 100644
--- a/C1.source/Sources/AlignerCore/Thumbnails/NativeSkeletonThumbnailProvider.swift
+++ b/C1.source/Sources/AlignerCore/Thumbnails/NativeSkeletonThumbnailProvider.swift
@@ -34,6 +34,13 @@
     }
 }
 
+public enum SkeletonThumbnailPalette {
+    public static let headerAlpha: CGFloat = 0.10
+    public static let contentRowAlpha: CGFloat = 0.075
+    public static let accentStripeAlpha: CGFloat = 0.28
+    public static let titleBandAlpha: CGFloat = 0.86
+}
+
 @MainActor
 public final class NativeSkeletonThumbnailProvider: SkeletonThumbnailProviderProtocol {
     public static let defaultSize = NSSize(width: 120, height: 80)
@@ -79,7 +86,7 @@
             width: bounds.width,
             height: template.headerHeight
         )
-        color(for: template.category).withAlphaComponent(0.22).setFill()
+        color(for: template.category).withAlphaComponent(SkeletonThumbnailPalette.headerAlpha).setFill()
         NSBezierPath(roundedRect: header, xRadius: 6, yRadius: 6).fill()
     }
 
@@ -104,7 +111,7 @@
                 width: maxWidth * widthRatio,
                 height: rowHeight
             )
-            NSColor.secondaryLabelColor.withAlphaComponent(0.18).setFill()
+            NSColor.secondaryLabelColor.withAlphaComponent(SkeletonThumbnailPalette.contentRowAlpha).setFill()
             NSBezierPath(roundedRect: rect, xRadius: 3, yRadius: 3).fill()
         }
     }
@@ -120,14 +127,14 @@
                 width: stripeWidth,
                 height: max(4, template.headerHeight - 10)
             )
-            color(for: template.category).withAlphaComponent(0.55).setFill()
+            color(for: template.category).withAlphaComponent(SkeletonThumbnailPalette.accentStripeAlpha).setFill()
             NSBezierPath(roundedRect: rect, xRadius: 3, yRadius: 3).fill()
         }
     }
 
     private func drawTitle(_ title: String, in bounds: NSRect) {
         let titleBand = NSRect(x: 0, y: 0, width: bounds.width, height: 24)
-        NSColor.windowBackgroundColor.withAlphaComponent(0.86).setFill()
+        NSColor.windowBackgroundColor.withAlphaComponent(SkeletonThumbnailPalette.titleBandAlpha).setFill()
         NSBezierPath(roundedRect: titleBand, xRadius: 6, yRadius: 6).fill()
 
         let paragraph = NSMutableParagraphStyle()
diff --git a/C1.source/Tests/AlignerCoreTests/AlignerCoreTests.swift b/C1.source/Tests/AlignerCoreTests/AlignerCoreTests.swift
index cbc65ff..6224f6e 100644
--- a/C1.source/Tests/AlignerCoreTests/AlignerCoreTests.swift
+++ b/C1.source/Tests/AlignerCoreTests/AlignerCoreTests.swift
@@ -707,6 +707,13 @@
         XCTAssertTrue(templates.allSatisfy { $0.contentRows > 0 })
     }
 
+    func testSkeletonThumbnailPaletteStaysQuietForFallbackState() {
+        XCTAssertLessThanOrEqual(SkeletonThumbnailPalette.headerAlpha, 0.10)
+        XCTAssertLessThanOrEqual(SkeletonThumbnailPalette.contentRowAlpha, 0.08)
+        XCTAssertLessThanOrEqual(SkeletonThumbnailPalette.accentStripeAlpha, 0.30)
+        XCTAssertGreaterThanOrEqual(SkeletonThumbnailPalette.titleBandAlpha, 0.80)
+    }
+
     @MainActor
     func testNativeSkeletonThumbnailProviderProducesValidImages() {
         let provider = NativeSkeletonThumbnailProvider()
diff --git a/C3.tools/round1-app-shelf-fixture-qa.sh b/C3.tools/round1-app-shelf-fixture-qa.sh
index 59446ee..e066efc 100755
--- a/C3.tools/round1-app-shelf-fixture-qa.sh
+++ b/C3.tools/round1-app-shelf-fixture-qa.sh
@@ -140,28 +140,29 @@
 require(items[0].get("iconFrame", {}).get("width") == expected_icon_size, "non-hovered selected app icon must match normal fixture icon size")
 require(items[hover_index].get("iconFrame", {}).get("width") == 68, "hovered app icon must be 68pt")
 
-blue_reference = next(
-    (
-        color
-        for segment in segments
-        for color in segment.get("windowBlockColors", [])
-        if color.get("alpha", 0) > 0
-    ),
-    None
-)
-require(blue_reference is not None, "fixture must expose a Space Lane blue reference color")
+blue_reference = {"red": 135 / 255, "green": 200 / 255, "blue": 1.0, "alpha": 1.0}
 hovered_title_color = columns[hover_index].get("appNameColor", {})
+hovered_header_color = columns[hover_index].get("headerBackgroundColor", {})
+hovered_count_color = columns[hover_index].get("countColor", {})
 for channel in ("red", "green", "blue"):
     require(
-        abs(hovered_title_color.get(channel, -1) - blue_reference.get(channel, -2)) <= 0.002,
-        f"hovered column title must use the same blue reference for {channel}"
+        abs(hovered_header_color.get(channel, -1) - blue_reference.get(channel, -2)) <= 0.002,
+        f"hovered column header must use #87C8FF for {channel}"
     )
-require(hovered_title_color.get("alpha", 0) >= 0.98, "hovered column title color must be opaque")
+require(hovered_header_color.get("alpha", 0) >= 0.98, "hovered column header blue fill must be opaque")
+for color_name, color in (("title", hovered_title_color), ("count", hovered_count_color)):
+    for channel in ("red", "green", "blue", "alpha"):
+        require(abs(color.get(channel, -1) - 1.0) <= 0.002, f"hovered column {color_name} text must be pure white for {channel}")
 for index, column in enumerate(columns):
     if index == hover_index:
         continue
     require(column.get("isHovered") is False, "non-hovered columns must not be marked hovered")
     require("hover" not in column.get("visualStates", []), "non-hovered columns must not expose hover visual state")
+    normal_header = column.get("headerBackgroundColor", {})
+    require(
+        any(abs(normal_header.get(channel, -1) - blue_reference[channel]) > 0.05 for channel in ("red", "green", "blue")),
+        "non-hovered column headers must not use the hover blue fill"
+    )
 
 normal_items = [
     item for item in items
@@ -187,7 +188,9 @@
     "selectedIcon": items[0].get("iconFrame"),
     "hoveredIndex": root.get("appShelfHoveredIndex"),
     "hoveredIcon": items[hover_index].get("iconFrame"),
+    "hoveredColumnHeaderColor": hovered_header_color,
     "hoveredColumnTitleColor": hovered_title_color,
+    "hoveredColumnCountColor": hovered_count_color,
     "blueReference": blue_reference,
     "selectedZ": selected_z,
     "hoverZ": hover_z,
diff --git a/C3.tools/round1-view-mode-entry-qa.sh b/C3.tools/round1-view-mode-entry-qa.sh
index 1dfb68f..84083d4 100755
--- a/C3.tools/round1-view-mode-entry-qa.sh
+++ b/C3.tools/round1-view-mode-entry-qa.sh
@@ -12,6 +12,8 @@
 APP="$BUILD_CURRENT_APP"
 REPORT_VERTICAL="$BUILD_REPORT_ROOT/round01-view-mode-entry-vertical-report.json"
 REPORT_HORIZONTAL="$BUILD_REPORT_ROOT/round01-view-mode-entry-horizontal-report.json"
+REPORT_VERTICAL_HOVER="$BUILD_REPORT_ROOT/round01-view-mode-entry-vertical-hover-report.json"
+REPORT_HORIZONTAL_HOVER="$BUILD_REPORT_ROOT/round01-view-mode-entry-horizontal-hover-report.json"
 REPORT_TOGGLE_TO_HORIZONTAL="$BUILD_REPORT_ROOT/round01-view-mode-entry-toggle-to-horizontal-report.json"
 REPORT_TOGGLE_TO_VERTICAL="$BUILD_REPORT_ROOT/round01-view-mode-entry-toggle-to-vertical-report.json"
 DOMAIN="com.ar.Aligner"
@@ -137,8 +139,9 @@
 settings_window = report.get("settingsWindow", {})
 root = report.get("rootView", {})
 expected_target_mode = "verticalColumns" if expected_mode == "horizontalMasonry" else "horizontalMasonry"
-expected_icon_kind = "verticalColumnsTarget" if expected_target_mode == "verticalColumns" else "horizontalMasonryTarget"
+expected_icon_kind = "H2" if expected_mode == "horizontalMasonry" else "Z2"
 expected_accessibility_label = "切换到纵栏瀑布" if expected_target_mode == "verticalColumns" else "切换到横栏瀑布"
+standard_blue = {"red": 135 / 255, "green": 200 / 255, "blue": 1.0, "alpha": 1.0}
 
 require(report.get("snapshotLoaded") is True, "snapshotLoaded must be true")
 require(report.get("quickSwitchVisible") is True, "Quick Switch must be visible during entry QA")
@@ -161,12 +164,18 @@
 require(root.get("settingsButtonVisible") is False, "Quick Switch must not expose the old top-right Settings button")
 require(root.get("viewModeToggleButtonVisible") is True, "Quick Switch must expose a top-right view-mode toggle button")
 toggle_frame = root.get("viewModeToggleButtonFrame", {})
-require(toggle_frame.get("width", 0) >= 30 and toggle_frame.get("height", 0) >= 30, "view-mode toggle button must have tappable size")
+require(toggle_frame.get("width", 0) == 30 and toggle_frame.get("height", 0) == 30, "view-mode toggle visual button must be 30pt")
+require(root.get("viewModeToggleHitSize") == 34, "view-mode toggle must keep a 34pt hit target")
 require(toggle_frame.get("x", 0) + toggle_frame.get("width", 0) > root.get("bounds", {}).get("width", 0) * 0.90, "view-mode toggle button must sit near the top-right edge")
 require(root.get("viewModeToggleCurrentMode") == expected_mode, "view-mode toggle must report the current mode")
 require(root.get("viewModeToggleTargetMode") == expected_target_mode, "view-mode toggle must report the next target mode")
-require(root.get("viewModeToggleIconKind") == expected_icon_kind, "view-mode toggle icon kind must represent the target mode")
+require(root.get("viewModeToggleIconKind") == expected_icon_kind, "view-mode toggle icon kind must represent the selected current mode")
+require(root.get("viewModeToggleVisualState") == expected_icon_kind, "view-mode toggle visual state must match the selected current mode")
 require(root.get("viewModeToggleAccessibilityLabel") == expected_accessibility_label, "view-mode toggle label must name the target mode")
+blue = root.get("viewModeToggleStandardBlueColor", {})
+for channel, expected in standard_blue.items():
+    require(abs(blue.get(channel, -1) - expected) <= 0.002, f"view-mode toggle standard blue must be #87C8FF for {channel}")
+require(abs(root.get("viewModeToggleGlyphLineWidth", 0) - 1.65) <= 0.001, "view-mode toggle glyphs must share the standard line width")
 require(settings_window.get("visible") is False, "Settings window should not be open in passive view-mode entry cases")
 require(report.get("aboutVersion") == app_version, "About version must match app Info.plist")
 require(report.get("aboutBuild") == app_build, "About build must match app Info.plist")
@@ -181,6 +190,88 @@
     "mainMenu": main_menu,
     "viewModeToggleButtonFrame": toggle_frame,
     "viewModeToggleTargetMode": root.get("viewModeToggleTargetMode"),
+    "viewModeToggleIconKind": root.get("viewModeToggleIconKind"),
+    "viewModeToggleVisualState": root.get("viewModeToggleVisualState")
+}, indent=2, ensure_ascii=False))
+PY
+}
+
+wait_for_hover_report() {
+  local report="$1"
+  local expected_mode="$2"
+
+  /usr/bin/python3 - "$report" "$expected_mode" "$REPORT_WAIT" <<'PY'
+import json
+import sys
+import time
+
+path = sys.argv[1]
+expected_mode = sys.argv[2]
+timeout = float(sys.argv[3])
+deadline = time.monotonic() + timeout
+last_report = None
+
+while time.monotonic() < deadline:
+    try:
+        with open(path, "r", encoding="utf-8") as file:
+            report = json.load(file)
+        last_report = report
+        root = report.get("rootView", {})
+        if (
+            report.get("snapshotLoaded") is True
+            and report.get("quickSwitchVisible") is True
+            and report.get("resolvedWaterfallViewMode") == expected_mode
+            and root.get("waterfallViewMode") == expected_mode
+            and root.get("lastMouseCommand") == "hover-view-toggle"
+        ):
+            sys.exit(0)
+    except FileNotFoundError:
+        pass
+    except json.JSONDecodeError:
+        pass
+    time.sleep(0.2)
+
+if last_report is not None:
+    print(json.dumps(last_report, indent=2, ensure_ascii=False), file=sys.stderr)
+print(f"view-mode hover report did not reach {expected_mode} within {timeout:.1f}s", file=sys.stderr)
+sys.exit(1)
+PY
+}
+
+assert_hover_report() {
+  local report="$1"
+  local expected_mode="$2"
+  local expected_visual_state="$3"
+
+  /usr/bin/python3 - "$report" "$expected_mode" "$expected_visual_state" <<'PY'
+import json
+import sys
+
+path = sys.argv[1]
+expected_mode = sys.argv[2]
+expected_visual_state = sys.argv[3]
+
+with open(path, "r", encoding="utf-8") as file:
+    report = json.load(file)
+
+def require(condition, message):
+    if not condition:
+        print(message, file=sys.stderr)
+        print(json.dumps(report, indent=2, ensure_ascii=False), file=sys.stderr)
+        sys.exit(1)
+
+root = report.get("rootView", {})
+require(root.get("waterfallViewMode") == expected_mode, "hover case must keep current view mode")
+require(root.get("lastMouseCommand") == "hover-view-toggle", "hover case must use the view toggle hover command")
+require(root.get("viewModeToggleButtonHovered") is True, "hover case must mark the toggle hovered")
+require(root.get("viewModeToggleHoverPreviewSuppressed") is False, "hover preview must not be suppressed in hover case")
+require(root.get("viewModeToggleVisualState") == expected_visual_state, "hover case must expose the target unselected visual state")
+require(root.get("viewModeToggleIconKind") == expected_visual_state, "hover icon kind must match visual state")
+
+print(json.dumps({
+    "case": "view-mode-hover",
+    "mode": expected_mode,
+    "viewModeToggleVisualState": root.get("viewModeToggleVisualState"),
     "viewModeToggleIconKind": root.get("viewModeToggleIconKind")
 }, indent=2, ensure_ascii=False))
 PY
@@ -262,7 +353,7 @@
 status_menu = report.get("statusMenu", {})
 main_menu = report.get("mainMenu", {})
 settings_window = report.get("settingsWindow", {})
-expected_icon_kind = "verticalColumnsTarget" if initial_mode == "verticalColumns" else "horizontalMasonryTarget"
+expected_icon_kind = "H2" if expected_mode == "horizontalMasonry" else "Z2"
 expected_label = "切换到纵栏瀑布" if initial_mode == "verticalColumns" else "切换到横栏瀑布"
 
 require(report.get("snapshotLoaded") is True, "toggle case must load the snapshot before clicking the view-mode toggle")
@@ -275,7 +366,9 @@
 require(root.get("viewModeToggleButtonVisible") is True, "Quick Switch root must report the view-mode toggle")
 require(root.get("viewModeToggleCurrentMode") == expected_mode, "toggle current mode must update after click")
 require(root.get("viewModeToggleTargetMode") == initial_mode, "toggle target mode must flip back to the initial mode after click")
-require(root.get("viewModeToggleIconKind") == expected_icon_kind, "toggle icon must represent the next target mode after click")
+require(root.get("viewModeToggleIconKind") == expected_icon_kind, "toggle icon must represent the selected mode after click")
+require(root.get("viewModeToggleVisualState") == expected_icon_kind, "toggle visual state must represent the selected mode after click")
+require(root.get("viewModeToggleHoverPreviewSuppressed") is True, "click should suppress hover preview until pointer exits")
 require(root.get("viewModeToggleAccessibilityLabel") == expected_label, "toggle label must represent the next target mode after click")
 require(status_menu.get("verticalColumnsState") == expected_vertical_state, "Vertical Columns menu state must update after toggle")
 require(status_menu.get("horizontalWaterfallState") == expected_horizontal_state, "Horizontal Waterfall menu state must update after toggle")
@@ -292,6 +385,7 @@
     "quickSwitchVisible": report.get("quickSwitchVisible"),
     "lastMouseCommand": root.get("lastMouseCommand"),
     "viewModeToggleIconKind": root.get("viewModeToggleIconKind"),
+    "viewModeToggleVisualState": root.get("viewModeToggleVisualState"),
     "statusMenu": status_menu,
     "mainMenu": main_menu
 }, indent=2, ensure_ascii=False))
@@ -322,6 +416,31 @@
 
   wait_for_loaded_report "$report" "$mode"
   assert_report "$report" "$mode" "$vertical_state" "$horizontal_state" "$app_version" "$app_build"
+  wait "$!" || true
+  stop_current_aligner
+}
+
+run_hover_case() {
+  local mode="$1"
+  local expected_visual_state="$2"
+  local report="$3"
+
+  stop_current_aligner
+  rm -f "$report"
+  /usr/bin/defaults write "$DOMAIN" "$WATERFALL_MODE_KEY" -string "$mode"
+
+  "$APP/Contents/MacOS/Aligner" \
+    --round0-skip-permissions \
+    --round01-open-quick-switch \
+    --round01-fixture-app-count=4 \
+    --round01-fixture-windows-per-app=2 \
+    --round01-disable-screenshot-refresh \
+    --round01-debug-mouse-sequence="hover-view-toggle" \
+    --round01-quick-switch-report="$report" \
+    --round01-quick-switch-quit-after=1.2 &
+
+  wait_for_hover_report "$report" "$mode"
+  assert_hover_report "$report" "$mode" "$expected_visual_state"
   wait "$!" || true
   stop_current_aligner
 }
@@ -367,6 +486,8 @@
 
 run_case "verticalColumns" "$REPORT_VERTICAL" "on" "off" "$APP_VERSION" "$APP_BUILD"
 run_case "horizontalMasonry" "$REPORT_HORIZONTAL" "off" "on" "$APP_VERSION" "$APP_BUILD"
+run_hover_case "verticalColumns" "H1" "$REPORT_VERTICAL_HOVER"
+run_hover_case "horizontalMasonry" "Z1" "$REPORT_HORIZONTAL_HOVER"
 run_toggle_case "verticalColumns" "horizontalMasonry" "$REPORT_TOGGLE_TO_HORIZONTAL" "off" "on" "$APP_VERSION" "$APP_BUILD"
 run_toggle_case "horizontalMasonry" "verticalColumns" "$REPORT_TOGGLE_TO_VERTICAL" "on" "off" "$APP_VERSION" "$APP_BUILD"
 

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