Prepare v0.5.3 release updates and UI polish

CHANGELOG.md

@@ -4,6 +4,25 @@ All notable changes to **Neon Vision Editor** are documented in this file.
 
 The format follows *Keep a Changelog*. Versions use semantic versioning with prerelease tags.
 
+## [v0.5.3] - 2026-03-10
+
+### Added
+- Added a new high-readability colorful light theme preset: `Prism Daylight` (also selectable while app appearance is set to dark).
+- Added double-click-to-close behavior for tabs on macOS tab strips.
+- Added split editor settings sections (`Basics` / `Behavior`) to reduce scrolling in the Editor tab.
+
+### Improved
+- Improved custom theme vibrancy by applying the vivid neon syntax profile to `Custom`, so syntax colors remain bright and saturated.
+- Improved Cyber Lime readability in light mode by reducing overly bright green token intensity and switching to a blue cursor accent.
+- Improved toolbar symbol color options on macOS with clearer separation between `Dark Gray` and `Black`, plus near-white rendering in dark mode for both options.
+- Improved translucent macOS toolbar consistency by enforcing `0.8` opacity for toolbar surfaces in translucency mode.
+
+### Fixed
+- Fixed toolbar-symbol contrast edge cases in dark mode where gray/black variants could appear too similar.
+
+### Release
+- Notarized release published via `scripts/release_all.sh v0.5.3 notarized`.
+
 ## [v0.5.2] - 2026-03-09
 
 ### Added

Neon Vision Editor.xcodeproj/project.pbxproj

@@ -361,7 +361,7 @@
 				CODE_SIGNING_ALLOWED = YES;
 				CODE_SIGN_IDENTITY = "Apple Development";
 				CODE_SIGN_STYLE = Automatic;
-				CURRENT_PROJECT_VERSION = 489;
+				CURRENT_PROJECT_VERSION = 490;
 				DEAD_CODE_STRIPPING = YES;
 				DEVELOPMENT_TEAM = CS727NF72U;
 				ENABLE_APP_SANDBOX = YES;
@@ -444,7 +444,7 @@
 				CODE_SIGNING_ALLOWED = YES;
 				CODE_SIGN_IDENTITY = "Apple Development";
 				CODE_SIGN_STYLE = Automatic;
-				CURRENT_PROJECT_VERSION = 489;
+				CURRENT_PROJECT_VERSION = 490;
 				DEAD_CODE_STRIPPING = YES;
 				DEVELOPMENT_TEAM = CS727NF72U;
 				ENABLE_APP_SANDBOX = YES;

Neon Vision Editor/UI/ContentView+Toolbar.swift

@@ -39,6 +39,24 @@ extension ContentView {
         "AI Provider for Code Completion"
     }
 
+#if os(macOS)
+    private var macToolbarSymbolColor: Color {
+        let isDarkMode = colorScheme == .dark
+        switch toolbarSymbolsColorMacRaw {
+        case "black":
+            return isDarkMode
+                ? Color(.sRGB, white: 0.94, opacity: 1.0)
+                : .black
+        case "darkGray":
+            return isDarkMode
+                ? Color(.sRGB, white: 0.84, opacity: 1.0)
+                : Color(.sRGB, white: 0.40, opacity: 1.0)
+        default:
+            return NeonUIStyle.accentBlue
+        }
+    }
+#endif
+
 #if os(iOS)
     private var iOSToolbarChromeStyle: GlassChromeStyle { .single }
     private var iOSToolbarTintColor: Color {
@@ -941,19 +959,19 @@ extension ContentView {
         ToolbarItemGroup(placement: .primaryAction) {
             Button(action: { openFileFromToolbar() }) {
                 Label("Open", systemImage: "folder")
-                    .foregroundStyle(NeonUIStyle.accentBlue)
+                    .foregroundStyle(macToolbarSymbolColor)
             }
             .help("Open File… (Cmd+O)")
 
             Button(action: { viewModel.addNewTab() }) {
                 Label("New Tab", systemImage: "plus.square.on.square")
-                    .foregroundStyle(NeonUIStyle.accentBlue)
+                    .foregroundStyle(macToolbarSymbolColor)
             }
             .help("New Tab (Cmd+T)")
 
             Button(action: { requestCloseAllTabsFromToolbar() }) {
                 Label("Close All Tabs", systemImage: "xmark.square")
-                    .foregroundStyle(NeonUIStyle.accentBlue)
+                    .foregroundStyle(macToolbarSymbolColor)
             }
             .help("Close All Tabs")
 
@@ -961,7 +979,7 @@ extension ContentView {
                 saveCurrentTabFromToolbar()
             }) {
                 Label("Save", systemImage: "square.and.arrow.down")
-                    .foregroundStyle(NeonUIStyle.accentBlue)
+                    .foregroundStyle(macToolbarSymbolColor)
             }
             .disabled(viewModel.selectedTab == nil)
             .help("Save File (Cmd+S)")
@@ -970,7 +988,7 @@ extension ContentView {
                 showFindReplace = true
             }) {
                 Label("Find", systemImage: "magnifyingglass")
-                    .foregroundStyle(NeonUIStyle.accentBlue)
+                    .foregroundStyle(macToolbarSymbolColor)
             }
             .help("Find & Replace (Cmd+F)")
 
@@ -978,7 +996,7 @@ extension ContentView {
                 openSettings()
             }) {
                 Label("Settings", systemImage: "gearshape")
-                    .foregroundStyle(NeonUIStyle.accentBlue)
+                    .foregroundStyle(macToolbarSymbolColor)
             }
             .help("Settings")
         }
@@ -1036,7 +1054,7 @@ extension ContentView {
                     toggleMarkdownPreviewFromToolbar()
                 }) {
                     Label("Markdown Preview", systemImage: showMarkdownPreviewPane ? "doc.richtext.fill" : "doc.richtext")
-                        .foregroundStyle(NeonUIStyle.accentBlue)
+                        .foregroundStyle(macToolbarSymbolColor)
                 }
                 .disabled(currentLanguage != "markdown")
                 .help("Toggle Markdown Preview")
@@ -1049,7 +1067,7 @@ extension ContentView {
                         Button("Compact") { markdownPreviewTemplateRaw = "compact" }
                     } label: {
                         Label("Preview Style", systemImage: "textformat.size")
-                            .foregroundStyle(NeonUIStyle.accentBlue)
+                            .foregroundStyle(macToolbarSymbolColor)
                     }
                     .help("Markdown Preview Template")
                 }
@@ -1058,7 +1076,7 @@ extension ContentView {
 
             Button(action: { undoFromToolbar() }) {
                 Label("Undo", systemImage: "arrow.uturn.backward")
-                    .foregroundStyle(NeonUIStyle.accentBlue)
+                    .foregroundStyle(macToolbarSymbolColor)
             }
             .help("Undo (Cmd+Z)")
             .keyboardShortcut("z", modifiers: .command)
@@ -1068,7 +1086,7 @@ extension ContentView {
                     showUpdaterDialog(checkNow: true)
                 }) {
                     Label("Updates", systemImage: "arrow.triangle.2.circlepath.circle")
-                        .foregroundStyle(NeonUIStyle.accentBlue)
+                        .foregroundStyle(macToolbarSymbolColor)
                 }
                 .help("Check for Updates")
             }
@@ -1078,20 +1096,20 @@ extension ContentView {
                 openWindow(id: "blank-window")
             }) {
                 Label("New Window", systemImage: "macwindow.badge.plus")
-                    .foregroundStyle(NeonUIStyle.accentBlue)
+                    .foregroundStyle(macToolbarSymbolColor)
             }
             .help("New Window (Cmd+N)")
             #endif
 
             Button(action: { adjustEditorFontSize(-1) }) {
                 Label("Font -", systemImage: "textformat.size.smaller")
-                    .foregroundStyle(NeonUIStyle.accentBlue)
+                    .foregroundStyle(macToolbarSymbolColor)
             }
             .help("Decrease Font Size")
 
             Button(action: { adjustEditorFontSize(1) }) {
                 Label("Font +", systemImage: "textformat.size.larger")
-                    .foregroundStyle(NeonUIStyle.accentBlue)
+                    .foregroundStyle(macToolbarSymbolColor)
             }
             .help("Increase Font Size")
 
@@ -1099,7 +1117,7 @@ extension ContentView {
                 requestClearEditorContent()
             }) {
                 Label("Clear", systemImage: "eraser")
-                    .foregroundStyle(NeonUIStyle.accentBlue)
+                    .foregroundStyle(macToolbarSymbolColor)
             }
             .help("Clear Editor")
 
@@ -1107,7 +1125,7 @@ extension ContentView {
                 insertTemplateForCurrentLanguage()
             }) {
                 Label("Template", systemImage: "doc.badge.plus")
-                    .foregroundStyle(NeonUIStyle.accentBlue)
+                    .foregroundStyle(macToolbarSymbolColor)
             }
             .help("Insert Template for Current Language")
 
@@ -1115,7 +1133,7 @@ extension ContentView {
                 toggleSidebarFromToolbar()
             }) {
                 Label("Sidebar", systemImage: "sidebar.left")
-                    .foregroundStyle(NeonUIStyle.accentBlue)
+                    .foregroundStyle(macToolbarSymbolColor)
                     .symbolVariant(viewModel.showSidebar ? .fill : .none)
             }
             .help("Toggle Sidebar (Cmd+Opt+S)")
@@ -1124,7 +1142,7 @@ extension ContentView {
                 toggleProjectSidebarFromToolbar()
             }) {
                 Label("Project", systemImage: "sidebar.right")
-                    .foregroundStyle(NeonUIStyle.accentBlue)
+                    .foregroundStyle(macToolbarSymbolColor)
                     .symbolVariant(showProjectStructureSidebar ? .fill : .none)
             }
             .help("Toggle Project Structure Sidebar")
@@ -1133,7 +1151,7 @@ extension ContentView {
                 toggleAutoCompletion()
             }) {
                 Label("AI", systemImage: "bolt.horizontal.circle")
-                    .foregroundStyle(NeonUIStyle.accentBlue)
+                    .foregroundStyle(macToolbarSymbolColor)
                     .symbolVariant(isAutoCompletionEnabled ? .fill : .none)
             }
             .help(isAutoCompletionEnabled ? "Disable Code Completion" : "Enable Code Completion")
@@ -1143,7 +1161,7 @@ extension ContentView {
                 showBracketHelperBarMac.toggle()
             }) {
                 Label("Brackets", systemImage: "chevron.left.chevron.right")
-                    .foregroundStyle(NeonUIStyle.accentBlue)
+                    .foregroundStyle(macToolbarSymbolColor)
                     .symbolVariant(showBracketHelperBarMac ? .fill : .none)
             }
             .help(showBracketHelperBarMac ? "Hide Bracket Helper Bar" : "Show Bracket Helper Bar")
@@ -1154,7 +1172,7 @@ extension ContentView {
                 UserDefaults.standard.set(viewModel.isBrainDumpMode, forKey: "BrainDumpModeEnabled")
             }) {
                 Label("Brain Dump", systemImage: "note.text")
-                    .foregroundStyle(NeonUIStyle.accentBlue)
+                    .foregroundStyle(macToolbarSymbolColor)
                     .symbolVariant(viewModel.isBrainDumpMode ? .fill : .none)
             }
             .help("Brain Dump Mode")
@@ -1166,7 +1184,7 @@ extension ContentView {
                 NotificationCenter.default.post(name: .toggleTranslucencyRequested, object: enableTranslucentWindow)
             }) {
                 Label("Translucency", systemImage: enableTranslucentWindow ? "rectangle.fill" : "rectangle")
-                    .foregroundStyle(NeonUIStyle.accentBlue)
+                    .foregroundStyle(macToolbarSymbolColor)
             }
             .help("Toggle Translucent Window Background")
             .accessibilityLabel("Translucent Window Background")

Neon Vision Editor/UI/ContentView.swift

@@ -331,6 +331,7 @@ struct ContentView: View {
 #if os(macOS)
     @State private var hostWindowNumber: Int? = nil
     @AppStorage("ShowBracketHelperBarMac") var showBracketHelperBarMac: Bool = false
+    @AppStorage("SettingsToolbarSymbolsColorMac") var toolbarSymbolsColorMacRaw: String = "blue"
     @State private var windowCloseConfirmationDelegate: WindowCloseConfirmationDelegate? = nil
 #endif
     @State var showMarkdownPreviewPane: Bool = false
@@ -433,6 +434,13 @@ struct ContentView: View {
         }
         return AnyShapeStyle(Color(nsColor: .textBackgroundColor))
     }
+
+    private var macToolbarBackgroundStyle: AnyShapeStyle {
+        if enableTranslucentWindow {
+            return AnyShapeStyle(macTranslucencyMode.material.opacity(0.8))
+        }
+        return AnyShapeStyle(Color(nsColor: .textBackgroundColor))
+    }
 #elseif os(iOS)
     var primaryGlassMaterial: Material { colorScheme == .dark ? .regularMaterial : .ultraThinMaterial }
     var toolbarFallbackColor: Color {
@@ -4066,7 +4074,7 @@ struct ContentView: View {
         }
 #if os(macOS)
         .toolbarBackground(
-            macChromeBackgroundStyle,
+            macToolbarBackgroundStyle,
             for: ToolbarPlacement.windowToolbar
         )
         .toolbarBackgroundVisibility(Visibility.visible, for: ToolbarPlacement.windowToolbar)
@@ -4695,6 +4703,12 @@ struct ContentView: View {
                                         .padding(.vertical, 6)
                                 }
                                 .buttonStyle(.plain)
+#if os(macOS)
+                                .simultaneousGesture(
+                                    TapGesture(count: 2)
+                                        .onEnded { requestCloseTab(tab) }
+                                )
+#endif
 
                                 Button {
                                     requestCloseTab(tab)
@@ -4722,7 +4736,7 @@ struct ContentView: View {
         }
         .frame(minHeight: 42, maxHeight: 42, alignment: .center)
 #if os(macOS)
-        .background(macChromeBackgroundStyle)
+        .background(macToolbarBackgroundStyle)
 #else
         .background(
             enableTranslucentWindow

Neon Vision Editor/UI/NeonSettingsView.swift

@@ -29,6 +29,7 @@ struct NeonSettingsView: View {
     @AppStorage("SettingsEditorFontSize") private var editorFontSize: Double = 14
     @AppStorage("SettingsLineHeight") private var lineHeight: Double = 1.0
     @AppStorage("SettingsAppearance") private var appearance: String = "system"
+    @AppStorage("SettingsToolbarSymbolsColorMac") private var toolbarSymbolsColorMacRaw: String = "blue"
 #if os(iOS)
     @AppStorage("EnableTranslucentWindow") private var translucentWindow: Bool = true
 #else
@@ -73,6 +74,7 @@ struct NeonSettingsView: View {
     @State private var showDataDisclosureDialog: Bool = false
     @State private var availableEditorFonts: [String] = []
     @State private var moreSectionTab: String = "support"
+    @State private var editorSectionTab: String = "basics"
     @State private var diagnosticsCopyStatus: String = ""
     @State private var supportRefreshTask: Task<Void, Never>?
     @State private var isDiscoveringFonts: Bool = false
@@ -271,7 +273,8 @@ struct NeonSettingsView: View {
                 minSize: macSettingsWindowSize.min,
                 idealSize: macSettingsWindowSize.ideal,
                 translucentEnabled: supportsTranslucency && translucentWindow,
-                translucencyModeRaw: macTranslucencyModeRaw
+                translucencyModeRaw: macTranslucencyModeRaw,
+                appearanceRaw: appearance
             )
         )
 #endif
@@ -512,6 +515,17 @@ struct NeonSettingsView: View {
                     .pickerStyle(.segmented)
                 }
 
+                HStack(alignment: .center, spacing: UI.space12) {
+                    Text("Toolbar Symbols")
+                        .frame(width: isCompactSettingsLayout ? nil : standardLabelWidth, alignment: .leading)
+                    Picker("", selection: $toolbarSymbolsColorMacRaw) {
+                        Text("Blue").tag("blue")
+                        Text("Dark Gray").tag("darkGray")
+                        Text("Black").tag("black")
+                    }
+                    .pickerStyle(.segmented)
+                }
+
                 if supportsTranslucency {
                     Toggle("Translucent Window", isOn: $translucentWindow)
                         .frame(maxWidth: .infinity, alignment: .leading)
@@ -961,13 +975,88 @@ struct NeonSettingsView: View {
                 title: "Editor",
                 subtitle: "Display, indentation, editing behavior, and completion sources."
             )
+            editorSectionPicker
+            if editorSectionTab == "basics" {
+                editorBasicsSettings
+            } else {
+                editorBehaviorSettings
+            }
+        }
+    }
+
+    private var editorSectionPicker: some View {
+        VStack(alignment: .leading, spacing: UI.space8) {
+            Text("Section")
+                .font(Typography.footnote)
+                .foregroundStyle(.secondary)
+            Picker("Section", selection: $editorSectionTab) {
+                Text("Basics").tag("basics")
+                Text("Behavior").tag("behavior")
+            }
+            .pickerStyle(.segmented)
+        }
+        .frame(maxWidth: .infinity, alignment: .leading)
+    }
+
+    private var editorBasicsSettings: some View {
 #if os(iOS)
-            VStack(spacing: UI.space16) {
-                settingsCardSection(
-                    title: "Display",
-                    icon: "eye",
-                    tip: "Scope visuals are best used with line wrap disabled."
-                ) {
+        VStack(spacing: UI.space16) {
+            settingsCardSection(
+                title: "Display",
+                icon: "eye",
+                tip: "Scope visuals are best used with line wrap disabled."
+            ) {
+                Toggle("Show Line Numbers", isOn: $showLineNumbers)
+                Toggle("Highlight Current Line", isOn: $highlightCurrentLine)
+                Toggle("Highlight Matching Brackets", isOn: $highlightMatchingBrackets)
+                Toggle("Show Scope Guides (Non-Swift)", isOn: $showScopeGuides)
+                Toggle("Highlight Scoped Region", isOn: $highlightScopeBackground)
+                Toggle("Line Wrap", isOn: $lineWrapEnabled)
+                Text("When Line Wrap is enabled, scope guides/scoped region are turned off to avoid layout conflicts.")
+                    .font(Typography.footnote)
+                    .foregroundStyle(.secondary)
+                Text("Scope guides are intended for non-Swift languages. Swift favors matching-token highlight.")
+                    .font(Typography.footnote)
+                    .foregroundStyle(.secondary)
+                Text("Invisible character markers are disabled to avoid whitespace glyph artifacts.")
+                    .font(Typography.footnote)
+                    .foregroundStyle(.secondary)
+            }
+
+            settingsCardSection(
+                title: "Indentation",
+                icon: "increase.indent",
+                emphasis: .secondary
+            ) {
+                Picker("Indent Style", selection: $indentStyle) {
+                    Text("Spaces").tag("spaces")
+                    Text("Tabs").tag("tabs")
+                }
+                .pickerStyle(.segmented)
+
+                Stepper(value: $indentWidth, in: 2...8, step: 1) {
+                    Text(localized("Indent Width: %lld", Int64(indentWidth)))
+                }
+            }
+
+            settingsCardSection(
+                title: "Layout",
+                icon: "sidebar.left",
+                emphasis: .secondary
+            ) {
+                Picker("Project Navigator Position", selection: $projectNavigatorPlacementRaw) {
+                    Text("Left").tag(ContentView.ProjectNavigatorPlacement.leading.rawValue)
+                    Text("Right").tag(ContentView.ProjectNavigatorPlacement.trailing.rawValue)
+                }
+                .pickerStyle(.segmented)
+            }
+        }
+#else
+        GroupBox("Editor Basics") {
+            VStack(alignment: .leading, spacing: 16) {
+                VStack(alignment: .leading, spacing: UI.space10) {
+                    Text("Display")
+                        .font(Typography.sectionHeadline)
                     Toggle("Show Line Numbers", isOn: $showLineNumbers)
                     Toggle("Highlight Current Line", isOn: $highlightCurrentLine)
                     Toggle("Highlight Matching Brackets", isOn: $highlightMatchingBrackets)
@@ -984,12 +1073,13 @@ struct NeonSettingsView: View {
                         .font(Typography.footnote)
                         .foregroundStyle(.secondary)
                 }
+                .frame(maxWidth: .infinity, alignment: .leading)
 
-                settingsCardSection(
-                    title: "Indentation",
-                    icon: "increase.indent",
-                    emphasis: .secondary
-                ) {
+                Divider()
+
+                VStack(alignment: .leading, spacing: UI.space10) {
+                    Text("Indentation")
+                        .font(Typography.sectionHeadline)
                     Picker("Indent Style", selection: $indentStyle) {
                         Text("Spaces").tag("spaces")
                         Text("Tabs").tag("tabs")
@@ -1000,24 +1090,76 @@ struct NeonSettingsView: View {
                         Text(localized("Indent Width: %lld", Int64(indentWidth)))
                     }
                 }
+                .frame(maxWidth: .infinity, alignment: .leading)
 
-                settingsCardSection(
-                    title: "Layout",
-                    icon: "sidebar.left",
-                    emphasis: .secondary
-                ) {
+                Divider()
+
+                VStack(alignment: .leading, spacing: UI.space10) {
+                    Text("Layout")
+                        .font(Typography.sectionHeadline)
                     Picker("Project Navigator Position", selection: $projectNavigatorPlacementRaw) {
                         Text("Left").tag(ContentView.ProjectNavigatorPlacement.leading.rawValue)
                         Text("Right").tag(ContentView.ProjectNavigatorPlacement.trailing.rawValue)
                     }
                     .pickerStyle(.segmented)
                 }
+                .frame(maxWidth: .infinity, alignment: .leading)
+            }
+            .frame(maxWidth: .infinity, alignment: .leading)
+            .padding(UI.groupPadding)
+        }
+#endif
+    }
 
-                settingsCardSection(
-                    title: "Performance",
-                    icon: "speedometer",
-                    emphasis: .secondary
-                ) {
+    private var editorBehaviorSettings: some View {
+#if os(iOS)
+        VStack(spacing: UI.space16) {
+            settingsCardSection(
+                title: "Performance",
+                icon: "speedometer",
+                emphasis: .secondary
+            ) {
+                Picker("Preset", selection: $performancePresetRaw) {
+                    Text("Balanced").tag(ContentView.PerformancePreset.balanced.rawValue)
+                    Text("Large Files").tag(ContentView.PerformancePreset.largeFiles.rawValue)
+                    Text("Battery").tag(ContentView.PerformancePreset.battery.rawValue)
+                }
+                .pickerStyle(.segmented)
+                Text("Balanced keeps default behavior. Large Files and Battery enter performance mode earlier.")
+                    .font(Typography.footnote)
+                    .foregroundStyle(.secondary)
+            }
+
+            settingsCardSection(
+                title: "Editing",
+                icon: "keyboard",
+                emphasis: .secondary
+            ) {
+                Toggle("Auto Indent", isOn: $autoIndent)
+                Toggle("Auto Close Brackets", isOn: $autoCloseBrackets)
+                Toggle("Trim Trailing Whitespace", isOn: $trimTrailingWhitespace)
+                Toggle("Trim Edges for Syntax Detection", isOn: $trimWhitespaceForSyntaxDetection)
+            }
+
+            settingsCardSection(
+                title: "Completion",
+                icon: "sparkles",
+                emphasis: .secondary
+            ) {
+                Toggle("Enable Completion", isOn: $completionEnabled)
+                Toggle("Include Words in Document", isOn: $completionFromDocument)
+                Toggle("Include Syntax Keywords", isOn: $completionFromSyntax)
+                Text("For lower latency on large files, keep only one completion source enabled.")
+                    .font(Typography.footnote)
+                    .foregroundStyle(.secondary)
+            }
+        }
+#else
+        GroupBox("Editor Behavior") {
+            VStack(alignment: .leading, spacing: 16) {
+                VStack(alignment: .leading, spacing: UI.space10) {
+                    Text("Performance")
+                        .font(Typography.sectionHeadline)
                     Picker("Preset", selection: $performancePresetRaw) {
                         Text("Balanced").tag(ContentView.PerformancePreset.balanced.rawValue)
                         Text("Large Files").tag(ContentView.PerformancePreset.largeFiles.rawValue)
@@ -1028,23 +1170,25 @@ struct NeonSettingsView: View {
                         .font(Typography.footnote)
                         .foregroundStyle(.secondary)
                 }
+                .frame(maxWidth: .infinity, alignment: .leading)
 
-                settingsCardSection(
-                    title: "Editing",
-                    icon: "keyboard",
-                    emphasis: .secondary
-                ) {
+                Divider()
+
+                VStack(alignment: .leading, spacing: UI.space10) {
+                    Text("Editing")
+                        .font(Typography.sectionHeadline)
                     Toggle("Auto Indent", isOn: $autoIndent)
                     Toggle("Auto Close Brackets", isOn: $autoCloseBrackets)
                     Toggle("Trim Trailing Whitespace", isOn: $trimTrailingWhitespace)
                     Toggle("Trim Edges for Syntax Detection", isOn: $trimWhitespaceForSyntaxDetection)
                 }
+                .frame(maxWidth: .infinity, alignment: .leading)
 
-                settingsCardSection(
-                    title: "Completion",
-                    icon: "sparkles",
-                    emphasis: .secondary
-                ) {
+                Divider()
+
+                VStack(alignment: .leading, spacing: UI.space10) {
+                    Text("Completion")
+                        .font(Typography.sectionHeadline)
                     Toggle("Enable Completion", isOn: $completionEnabled)
                     Toggle("Include Words in Document", isOn: $completionFromDocument)
                     Toggle("Include Syntax Keywords", isOn: $completionFromSyntax)
@@ -1052,109 +1196,12 @@ struct NeonSettingsView: View {
                         .font(Typography.footnote)
                         .foregroundStyle(.secondary)
                 }
-            }
-#else
-            GroupBox("Editor") {
-                VStack(alignment: .leading, spacing: 16) {
-                    VStack(alignment: .leading, spacing: UI.space10) {
-                        Text("Display")
-                            .font(Typography.sectionHeadline)
-                        Toggle("Show Line Numbers", isOn: $showLineNumbers)
-                        Toggle("Highlight Current Line", isOn: $highlightCurrentLine)
-                        Toggle("Highlight Matching Brackets", isOn: $highlightMatchingBrackets)
-                        Toggle("Show Scope Guides (Non-Swift)", isOn: $showScopeGuides)
-                        Toggle("Highlight Scoped Region", isOn: $highlightScopeBackground)
-                        Toggle("Line Wrap", isOn: $lineWrapEnabled)
-                        Text("When Line Wrap is enabled, scope guides/scoped region are turned off to avoid layout conflicts.")
-                            .font(Typography.footnote)
-                            .foregroundStyle(.secondary)
-                        Text("Scope guides are intended for non-Swift languages. Swift favors matching-token highlight.")
-                            .font(Typography.footnote)
-                            .foregroundStyle(.secondary)
-                        Text("Invisible character markers are disabled to avoid whitespace glyph artifacts.")
-                            .font(Typography.footnote)
-                            .foregroundStyle(.secondary)
-                    }
-                    .frame(maxWidth: .infinity, alignment: .leading)
-
-                    Divider()
-
-                    VStack(alignment: .leading, spacing: UI.space10) {
-                        Text("Indentation")
-                            .font(Typography.sectionHeadline)
-                        Picker("Indent Style", selection: $indentStyle) {
-                            Text("Spaces").tag("spaces")
-                            Text("Tabs").tag("tabs")
-                        }
-                        .pickerStyle(.segmented)
-
-                        Stepper(value: $indentWidth, in: 2...8, step: 1) {
-                            Text(localized("Indent Width: %lld", Int64(indentWidth)))
-                        }
-                    }
-                    .frame(maxWidth: .infinity, alignment: .leading)
-
-                    Divider()
-
-                    VStack(alignment: .leading, spacing: UI.space10) {
-                        Text("Layout")
-                            .font(Typography.sectionHeadline)
-                        Picker("Project Navigator Position", selection: $projectNavigatorPlacementRaw) {
-                            Text("Left").tag(ContentView.ProjectNavigatorPlacement.leading.rawValue)
-                            Text("Right").tag(ContentView.ProjectNavigatorPlacement.trailing.rawValue)
-                        }
-                        .pickerStyle(.segmented)
-                    }
-                    .frame(maxWidth: .infinity, alignment: .leading)
-
-                    Divider()
-
-                    VStack(alignment: .leading, spacing: UI.space10) {
-                        Text("Performance")
-                            .font(Typography.sectionHeadline)
-                        Picker("Preset", selection: $performancePresetRaw) {
-                            Text("Balanced").tag(ContentView.PerformancePreset.balanced.rawValue)
-                            Text("Large Files").tag(ContentView.PerformancePreset.largeFiles.rawValue)
-                            Text("Battery").tag(ContentView.PerformancePreset.battery.rawValue)
-                        }
-                        .pickerStyle(.segmented)
-                        Text("Balanced keeps default behavior. Large Files and Battery enter performance mode earlier.")
-                            .font(Typography.footnote)
-                            .foregroundStyle(.secondary)
-                    }
-                    .frame(maxWidth: .infinity, alignment: .leading)
-
-                    Divider()
-
-                    VStack(alignment: .leading, spacing: UI.space10) {
-                        Text("Editing")
-                            .font(Typography.sectionHeadline)
-                        Toggle("Auto Indent", isOn: $autoIndent)
-                        Toggle("Auto Close Brackets", isOn: $autoCloseBrackets)
-                        Toggle("Trim Trailing Whitespace", isOn: $trimTrailingWhitespace)
-                        Toggle("Trim Edges for Syntax Detection", isOn: $trimWhitespaceForSyntaxDetection)
-                    }
-                    .frame(maxWidth: .infinity, alignment: .leading)
-
-                    Divider()
-
-                    VStack(alignment: .leading, spacing: UI.space10) {
-                        Text("Completion")
-                            .font(Typography.sectionHeadline)
-                        Toggle("Enable Completion", isOn: $completionEnabled)
-                        Toggle("Include Words in Document", isOn: $completionFromDocument)
-                        Toggle("Include Syntax Keywords", isOn: $completionFromSyntax)
-                        Text("For lower latency on large files, keep only one completion source enabled.")
-                            .font(Typography.footnote)
-                            .foregroundStyle(.secondary)
-                    }
-                    .frame(maxWidth: .infinity, alignment: .leading)
-                }
                 .frame(maxWidth: .infinity, alignment: .leading)
-                .padding(UI.groupPadding)
             }
-#endif
+            .frame(maxWidth: .infinity, alignment: .leading)
+            .padding(UI.groupPadding)
         }
+#endif
     }
 
     private var templateTab: some View {
@@ -2311,6 +2358,7 @@ struct SettingsWindowConfigurator: NSViewRepresentable {
     let idealSize: NSSize
     let translucentEnabled: Bool
     let translucencyModeRaw: String
+    let appearanceRaw: String
 
     final class Coordinator {
         var didInitialApply = false
@@ -2409,7 +2457,15 @@ struct SettingsWindowConfigurator: NSViewRepresentable {
 
     private func translucencyEnabledColor(enabled: Bool, window: NSWindow) -> NSColor {
         guard enabled else { return NSColor.windowBackgroundColor }
-        let isDark = window.effectiveAppearance.bestMatch(from: [.darkAqua, .aqua]) == .darkAqua
+        let isDark: Bool
+        switch appearanceRaw {
+        case "light":
+            isDark = false
+        case "dark":
+            isDark = true
+        default:
+            isDark = window.effectiveAppearance.bestMatch(from: [.darkAqua, .aqua]) == .darkAqua
+        }
         let whiteLevel: CGFloat
         switch translucencyModeRaw {
         case "subtle":

Neon Vision Editor/UI/PanelsAndHelpers.swift

@@ -341,12 +341,12 @@ struct WelcomeTourView: View {
     private let pages: [TourPage] = [
         TourPage(
             title: "What’s New in This Release",
-            subtitle: "Major changes since v0.5.1:",
+            subtitle: "Major changes since v0.5.2:",
             bullets: [
-                "Added editor performance presets in Settings (`Balanced`, `Large Files`, `Battery`) with shared runtime mapping.",
-                "Added configurable project navigator placement (`Left`/`Right`) for project-structure sidebar layout.",
-                "Added richer updater diagnostics details in Settings: staged update summary, last install-attempt summary, and recent sanitized log snippet.",
-                "Added CSV/TSV table mode with a `Table`/`Text` switch, lazy row rendering, and background parsing for larger datasets."
+                "Added a new high-readability colorful light theme preset: `Prism Daylight` (also selectable while app appearance is set to dark).",
+                "Added double-click-to-close behavior for tabs on macOS tab strips.",
+                "Added split editor settings sections (`Basics` / `Behavior`) to reduce scrolling in the Editor tab.",
+                "Improved custom theme vibrancy by applying the vivid neon syntax profile to `Custom`, so syntax colors remain bright and saturated."
             ],
             iconName: "sparkles.rectangle.stack",
             colors: [Color(red: 0.40, green: 0.28, blue: 0.90), Color(red: 0.96, green: 0.46, blue: 0.55)],

Neon Vision Editor/UI/ThemeSettings.swift

@@ -161,6 +161,7 @@ let editorThemeNames: [String] = [
     "Plasma Storm",
     "Inferno Neon",
     "Ultraviolet Flux",
+    "Prism Daylight",
     "Custom",
     "Dracula",
     "One Dark Pro",
@@ -259,14 +260,14 @@ private func paletteForThemeName(_ name: String, defaults: UserDefaults) -> Them
             return ThemePalette(
                 text: Color(red: 0.94, green: 0.98, blue: 0.92),
                 background: Color(red: 0.07, green: 0.09, blue: 0.06),
-                cursor: Color(red: 0.68, green: 1.00, blue: 0.20),
+                cursor: Color(red: 0.18, green: 0.48, blue: 0.96),
                 selection: Color(red: 0.18, green: 0.25, blue: 0.14),
-                keyword: Color(red: 0.68, green: 1.00, blue: 0.20),
-                string: Color(red: 0.20, green: 1.00, blue: 0.78),
+                keyword: Color(red: 0.45, green: 0.78, blue: 0.16),
+                string: Color(red: 0.13, green: 0.70, blue: 0.50),
                 number: Color(red: 1.00, green: 0.86, blue: 0.22),
                 comment: Color(red: 0.54, green: 0.62, blue: 0.50),
                 type: Color(red: 0.48, green: 0.86, blue: 1.00),
-                property: Color(red: 0.88, green: 1.00, blue: 0.36),
+                property: Color(red: 0.56, green: 0.78, blue: 0.28),
                 builtin: Color(red: 1.00, green: 0.48, blue: 0.40)
             )
         case "Plasma Storm":
@@ -311,6 +312,20 @@ private func paletteForThemeName(_ name: String, defaults: UserDefaults) -> Them
                 property: Color(red: 0.68, green: 0.72, blue: 1.00),
                 builtin: Color(red: 1.00, green: 0.28, blue: 0.56)
             )
+        case "Prism Daylight":
+            return ThemePalette(
+                text: Color(red: 0.08, green: 0.10, blue: 0.14),
+                background: Color(red: 0.96, green: 0.97, blue: 0.99),
+                cursor: Color(red: 0.14, green: 0.34, blue: 0.84),
+                selection: Color(red: 0.84, green: 0.89, blue: 0.99),
+                keyword: Color(red: 0.48, green: 0.13, blue: 0.71),
+                string: Color(red: 0.05, green: 0.48, blue: 0.33),
+                number: Color(red: 0.71, green: 0.28, blue: 0.03),
+                comment: Color(red: 0.37, green: 0.42, blue: 0.49),
+                type: Color(red: 0.00, green: 0.34, blue: 0.76),
+                property: Color(red: 0.64, green: 0.11, blue: 0.67),
+                builtin: Color(red: 0.76, green: 0.25, blue: 0.05)
+            )
         case "Dracula":
             return ThemePalette(
                 text: Color(red: 0.97, green: 0.97, blue: 0.95),
@@ -606,7 +621,8 @@ func currentEditorTheme(colorScheme: ColorScheme) -> EditorTheme {
             "Cyber Lime",
             "Plasma Storm",
             "Inferno Neon",
-            "Ultraviolet Flux"
+            "Ultraviolet Flux",
+            "Custom"
         ]
         return vividNeonThemes.contains(name) ? .neonRaw : .standard
     }()

README.md

@@ -64,7 +64,7 @@
 
 
 > Status: **active release**  
-> Latest release: **v0.5.2**
+> Latest release: **v0.5.3**
 > Platform target: **macOS 26 (Tahoe)** compatible with **macOS Sequoia**
 > Apple Silicon: tested / Intel: not tested
 > Last updated (README): **2026-03-10** for release line **v0.5.2**
@@ -161,7 +161,7 @@
 - Security policy: [`SECURITY.md`](SECURITY.md)
 - Release checklists: [`release/`](release/) — TestFlight & App Store preflight docs
 
-## What's New Since v0.5.1
+## What's New Since v0.5.2
 
 - Added `Close All Tabs` actions across macOS, iOS, and iPadOS with a confirmation safeguard.
 - Added project-sidebar quick actions (`Expand All` / `Collapse All`) and a default-on `Show Supported Files Only` filter.
@@ -195,7 +195,7 @@ Prebuilt binaries are available on [GitHub Releases](https://github.com/h3pdesig
 Best for direct notarized builds and fastest access to new stable versions.
 
 - Download: [GitHub Releases](https://github.com/h3pdesign/Neon-Vision-Editor/releases)
-- Latest release: **v0.5.2**
+- Latest release: **v0.5.3**
 - Channel: **Stable**
 - Architecture: Apple Silicon (Intel not tested)
 
@@ -598,15 +598,15 @@ All shortcuts use `Cmd` (`⌘`). iPad/iOS require a hardware keyboard.
 
 ## Changelog
 
-Latest stable: **v0.5.2** (2026-03-09)
+Latest stable: **v0.5.3** (2026-03-10)
 
 ### Recent Releases (At a glance)
 
 | Version | Date | Highlights | Fixes | Breaking changes | Migration |
 |---|---|---|---|---|---|
+| [`v0.5.3`](https://github.com/h3pdesign/Neon-Vision-Editor/releases/tag/v0.5.3) | 2026-03-10 | a new high-readability colorful light theme preset: `Prism Daylight` (also selectable while app appearance is set to dark); double-click-to-close behavior for tabs on macOS tab strips; custom theme vibrancy by applying the vivid neon syntax profile to `Custom`, so syntax colors remain bright and saturated | toolbar-symbol contrast edge cases in dark mode where gray/black variants could appear too similar | None noted | None required |
 | [`v0.5.2`](https://github.com/h3pdesign/Neon-Vision-Editor/releases/tag/v0.5.2) | 2026-03-09 | editor performance presets in Settings (`Balanced`, `Large Files`, `Battery`) with shared runtime mapping; configurable project navigator placement (`Left`/`Right`) for project-structure sidebar layout; iOS/iPadOS large-file responsiveness by lowering automatic large-file thresholds and applying preset-based tuning | missing diagnostics reset workflow by adding a dedicated `Clear Diagnostics` action that also clears file-open timing snapshots; macOS editor-window top-bar jumping when toggling the toolbar translucency control by keeping chrome flags stable; CSV/TSV mode header transparency so the mode bar now uses a solid standard window background | None noted | None required |
 | [`v0.5.1`](https://github.com/h3pdesign/Neon-Vision-Editor/releases/tag/v0.5.1) | 2026-03-08 | bulk `Close All Tabs` actions to toolbar surfaces (macOS, iOS, iPadOS), including a confirmation step before closing; project-structure quick actions to expand all folders or collapse all folders in one step; Markdown preview stability by preserving relative scroll position during preview refreshes | diagnostics export safety by redacting token-like updater status fragments before copying; Markdown regression coverage with new tests for Claude-style mixed-content Markdown and code-fence matching behavior; accidental destructive tab-bulk-close behavior by requiring explicit user confirmation before closing all tabs | None noted | None required |
-| [`v0.5.0`](https://github.com/h3pdesign/Neon-Vision-Editor/releases/tag/v0.5.0) | 2026-03-06 | updater staging hardening with retry/fallback behavior and staged-bundle integrity checks; explicit accessibility labels/hints for key toolbar actions and updater log/progress controls; CSV handling by enabling fast syntax profile earlier and for long-line CSV files to reduce freeze risk | updater staging resilience when `ditto` fails by retrying and falling back safely to copy-based staging; release preflight to fail on unresolved placeholder entries and stale README download metrics; inconsistent reappearance of the macOS settings tab title in the upper-left window title area | None noted | None required |
 
 - Full release history: [`CHANGELOG.md`](CHANGELOG.md)
 - Compare recent changes: [v0.5.0...v0.5.2](https://github.com/h3pdesign/Neon-Vision-Editor/compare/v0.5.0...v0.5.2)
@@ -628,12 +628,12 @@ Latest stable: **v0.5.2** (2026-03-09)
 
 ## Release Integrity
 
-- Tag: `v0.5.2`
+- Tag: `v0.5.3`
 - Tagged commit: `1c31306`
 - Verify local tag target:
 
 ```bash
-git rev-parse --verify v0.5.2
+git rev-parse --verify v0.5.3
 ```
 
 - Verify downloaded artifact checksum locally: