Restore sidebar edge fades

GhosttyTabs.xcodeproj/project.pbxproj

@@ -88,6 +88,7 @@
 		A50019B0 /* SettingsSearchAliases.swift in Sources */ = {isa = PBXBuildFile; fileRef = A50019B1 /* SettingsSearchAliases.swift */; };
 		A50019B2 /* SettingsSearchIndexTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = A50019B3 /* SettingsSearchIndexTests.swift */; };
 		A5001002 /* ContentView.swift in Sources */ = {isa = PBXBuildFile; fileRef = A5001012 /* ContentView.swift */; };
+		C0DE35010000000000000001 /* SidebarScrim.swift in Sources */ = {isa = PBXBuildFile; fileRef = C0DE35010000000000000002 /* SidebarScrim.swift */; };
 		62270F3DCECB4787D789CCE3 /* SidebarWorkspaceSnapshotRefreshPolicyTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = F016B5C09357B3226FA2E014 /* SidebarWorkspaceSnapshotRefreshPolicyTests.swift */; };
 		C3408A000000000000000001 /* ContentView+RightSidebarCommandPalette.swift in Sources */ = {isa = PBXBuildFile; fileRef = C3408A000000000000000002 /* ContentView+RightSidebarCommandPalette.swift */; };
 		D7AB00000000000000000003 /* ContentView+MoveTabToNewWorkspace.swift in Sources */ = {isa = PBXBuildFile; fileRef = D7AB00000000000000000004 /* ContentView+MoveTabToNewWorkspace.swift */; };
@@ -443,6 +444,7 @@
 		A50019B1 /* SettingsSearchAliases.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SettingsSearchAliases.swift; sourceTree = "<group>"; };
 		A50019B3 /* SettingsSearchIndexTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SettingsSearchIndexTests.swift; sourceTree = "<group>"; };
 		A5001012 /* ContentView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ContentView.swift; sourceTree = "<group>"; };
+		C0DE35010000000000000002 /* SidebarScrim.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SidebarScrim.swift; sourceTree = "<group>"; };
 		C3408A000000000000000002 /* ContentView+RightSidebarCommandPalette.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "ContentView+RightSidebarCommandPalette.swift"; sourceTree = "<group>"; };
 		D7AB00000000000000000004 /* ContentView+MoveTabToNewWorkspace.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "ContentView+MoveTabToNewWorkspace.swift"; sourceTree = "<group>"; };
 		D7AB34300000000000000002 /* SidebarDropPlanner.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Sidebar/SidebarDropPlanner.swift; sourceTree = "<group>"; };
@@ -838,6 +840,7 @@
 				A50019A1 /* SettingsNavigation.swift */,
 				A50019B1 /* SettingsSearchAliases.swift */,
 				A5001012 /* ContentView.swift */,
+				C0DE35010000000000000002 /* SidebarScrim.swift */,
 				C3408A000000000000000002 /* ContentView+RightSidebarCommandPalette.swift */,
 				D7AB00000000000000000004 /* ContentView+MoveTabToNewWorkspace.swift */,
 				D7AB34300000000000000002 /* SidebarDropPlanner.swift */,
@@ -1344,6 +1347,7 @@
 				A50019A0 /* SettingsNavigation.swift in Sources */,
 				A50019B0 /* SettingsSearchAliases.swift in Sources */,
 				A5001002 /* ContentView.swift in Sources */,
+				C0DE35010000000000000001 /* SidebarScrim.swift in Sources */,
 				C3408A000000000000000001 /* ContentView+RightSidebarCommandPalette.swift in Sources */,
 				D7AB00000000000000000003 /* ContentView+MoveTabToNewWorkspace.swift in Sources */,
 				D7AB34300000000000000001 /* SidebarDropPlanner.swift in Sources */,

Sources/ContentView.swift

@@ -9809,6 +9809,10 @@ struct VerticalTabsSidebar: View {
         SidebarWorkspaceListMetrics.topScrimHeight
     }
 
+    private var sidebarBottomScrimHeight: CGFloat {
+        SidebarWorkspaceListMetrics.bottomScrimHeight
+    }
+
     private var isMinimalMode: Bool {
         WorkspacePresentationModeSettings.mode(for: workspacePresentationMode) == .minimal
     }
@@ -9909,7 +9913,7 @@ struct VerticalTabsSidebar: View {
             workspaceTerminalScrollBarHiddenById: workspaceTerminalScrollBarHiddenById
         )
 
-        VStack(spacing: 0) {
+        ZStack(alignment: .bottomLeading) {
             workspaceScrollArea(renderContext: renderContext)
             SidebarFooter(updateViewModel: updateViewModel, fileExplorerState: fileExplorerState, onSendFeedback: onSendFeedback)
                 .frame(maxWidth: .infinity, alignment: .leading)
@@ -10008,14 +10012,21 @@ struct VerticalTabsSidebar: View {
                     .frame(width: 0, height: 0)
                 )
                 .safeAreaInset(edge: .top, spacing: 0) {
-                    Color.clear
-                        .frame(height: workspaceScrollTopVisibilityInset)
+                    Color.clear.frame(height: workspaceScrollTopVisibilityInset)
+                        .allowsHitTesting(false)
+                }
+                .safeAreaInset(edge: .bottom, spacing: 0) {
+                    Color.clear.frame(height: sidebarBottomScrimHeight)
                         .allowsHitTesting(false)
                 }
                 .overlay(alignment: .top) {
                     SidebarTopScrim(height: sidebarTopScrimHeight)
                         .allowsHitTesting(false)
                 }
+                .overlay(alignment: .bottom) {
+                    SidebarBottomScrim(height: sidebarBottomScrimHeight)
+                        .allowsHitTesting(false)
+                }
                 .overlay(alignment: .top) {
                     // The sidebar top strip remains draggable and handles
                     // double-clicks with the standard titlebar action.
@@ -12427,15 +12438,6 @@ private struct SidebarDevFooter: View {
 }
 #endif
 
-private struct SidebarTopScrim: View {
-    let height: CGFloat
-
-    var body: some View {
-        Color.clear
-            .frame(height: height)
-    }
-}
-
 private struct SidebarScrollViewResolver: NSViewRepresentable {
     let onResolve: (NSScrollView?) -> Void
 

Sources/SidebarScrim.swift

@@ -0,0 +1,68 @@
+import AppKit
+import SwiftUI
+
+struct SidebarTopScrim: View {
+    let height: CGFloat
+
+    var body: some View {
+        SidebarEdgeScrim(height: height, edge: .top)
+    }
+}
+
+struct SidebarBottomScrim: View {
+    let height: CGFloat
+
+    var body: some View {
+        SidebarEdgeScrim(height: height, edge: .bottom)
+    }
+}
+
+struct SidebarEdgeScrim: View {
+    enum Edge {
+        case top
+        case bottom
+    }
+
+    let height: CGFloat
+    let edge: Edge
+
+    var body: some View {
+        SidebarEdgeBlurEffect()
+            .frame(height: height)
+            .mask(
+                LinearGradient(
+                    colors: gradientColors,
+                    startPoint: .top,
+                    endPoint: .bottom
+                )
+            )
+    }
+
+    private var gradientColors: [Color] {
+        let colors = [
+            Color.black.opacity(0.95),
+            Color.black.opacity(0.75),
+            Color.black.opacity(0.35),
+            Color.clear,
+        ]
+        switch edge {
+        case .top:
+            return colors
+        case .bottom:
+            return Array(colors.reversed())
+        }
+    }
+}
+
+struct SidebarEdgeBlurEffect: NSViewRepresentable {
+    func makeNSView(context: Context) -> NSVisualEffectView {
+        let view = NSVisualEffectView()
+        view.blendingMode = .withinWindow
+        view.material = .underWindowBackground
+        view.state = .active
+        view.isEmphasized = false
+        return view
+    }
+
+    func updateNSView(_ nsView: NSVisualEffectView, context: Context) {}
+}

Sources/WindowChromeMetrics.swift

@@ -32,6 +32,7 @@ enum SidebarWorkspaceListMetrics {
     static let firstRowTopOffset: CGFloat = MinimalModeChromeMetrics.titlebarHeight + 2
     static let rowVerticalPadding: CGFloat = 8
     static let topScrimHeight: CGFloat = firstRowTopOffset + 20
+    static let bottomScrimHeight: CGFloat = topScrimHeight
 
     static var scrollTopInset: CGFloat {
         max(0, firstRowTopOffset - rowVerticalPadding)