Prepare v0.5.1 release updates

CHANGELOG.md

@@ -6,13 +6,30 @@ The format follows *Keep a Changelog*. Versions use semantic versioning with pre
 
 ## [Unreleased]
 
+## [v0.5.1] - 2026-03-08
+
+### Added
+- Added bulk `Close All Tabs` actions to toolbar surfaces (macOS, iOS, iPadOS), including a confirmation step before closing.
+- Added project-structure quick actions to expand all folders or collapse all folders in one step.
+- Added six vivid neon syntax themes with distinct color profiles: `Neon Voltage`, `Laserwave`, `Cyber Lime`, `Plasma Storm`, `Inferno Neon`, and `Ultraviolet Flux`.
+- Added a lock-safe cross-platform build matrix helper script (`scripts/ci/build_platform_matrix.sh`) to run macOS + iOS Simulator + iPad Simulator builds sequentially.
+- Added iPhone Markdown preview as a bottom sheet with toolbar toggle and resizable detents for Apple-guideline-compliant height control.
+- Added unsupported-file safety handling across project sidebar, open/import flows, and user-facing unsupported-file alerts instead of crash paths.
+- Added a project-sidebar switch to show only supported files (enabled by default).
+- Added SVG (`.svg`) editor file support with XML language mapping and syntax-highlighting path reuse.
+
 ### Improved
 - Improved Markdown preview stability by preserving relative scroll position during preview refreshes.
 - Improved Markdown preview behavior for very large files by using a safe plain-text fallback with explicit status messaging instead of full HTML conversion.
+- Improved neon syntax vibrancy consistency by extending the raw-neon adjustment profile to additional high-intensity neon themes.
+- Improved contributor guidance with a documented lock-safe platform build verification command in `README.md`.
+- Improved iPhone markdown preview sheet header density by using inline navigation-title mode to align title height with the `Done/Fertig` action row.
 
 ### Fixed
 - Fixed diagnostics export safety by redacting token-like updater status fragments before copying.
 - Fixed Markdown regression coverage with new tests for Claude-style mixed-content Markdown and code-fence matching behavior.
+- Fixed accidental destructive tab-bulk-close behavior by requiring explicit user confirmation before closing all tabs.
+- Fixed missing localization for new close-all confirmation/actions by adding English and German strings.
 
 ## [v0.5.0] - 2026-03-06
 

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 = 433;
+				CURRENT_PROJECT_VERSION = 434;
 				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 = 433;
+				CURRENT_PROJECT_VERSION = 434;
 				DEAD_CODE_STRIPPING = YES;
 				DEVELOPMENT_TEAM = CS727NF72U;
 				ENABLE_APP_SANDBOX = YES;

Neon Vision Editor/Core/LanguageDetector.swift

@@ -28,6 +28,7 @@ public struct LanguageDetector {
         "yaml": "yaml",
         "yml": "yaml",
         "xml": "xml",
+        "svg": "xml",
         "plist": "xml",
         "sql": "sql",
         "log": "log",

Neon Vision Editor/Data/EditorViewModel.swift

@@ -3,6 +3,9 @@ import Observation
 import UniformTypeIdentifiers
 import Foundation
 import OSLog
+#if os(macOS)
+import AppKit
+#endif
 #if canImport(UIKit)
 import UIKit
 #endif
@@ -802,6 +805,7 @@ class EditorViewModel {
         "yaml": "yaml",
         "yml": "yaml",
         "xml": "xml",
+        "svg": "xml",
         "sql": "sql",
         "log": "log",
         "vim": "vim",
@@ -1182,7 +1186,9 @@ class EditorViewModel {
         if panel.runModal() == .OK {
             let urls = panel.urls
             for url in urls {
-                openFile(url: url)
+                if !openFile(url: url) {
+                    presentUnsupportedFileAlertOnMac(for: url)
+                }
             }
         }
 #else
@@ -1192,8 +1198,13 @@ class EditorViewModel {
     }
 
     // Loads a file into a new tab unless the file is already open.
-    func openFile(url: URL) {
-        if focusTabIfOpen(for: url) { return }
+    @discardableResult
+    func openFile(url: URL) -> Bool {
+        guard Self.isSupportedEditorFileURL(url) else {
+            debugLog("Unsupported file type skipped: \(url.lastPathComponent)")
+            return false
+        }
+        if focusTabIfOpen(for: url) { return true }
         let extLangHint = LanguageDetector.shared.preferredLanguage(for: url) ?? languageMap[url.pathExtension.lowercased()]
         let fileSize = (try? url.resourceValues(forKeys: [.fileSizeKey]).fileSize) ?? 0
         let isLargeCandidate = fileSize >= EditorLoadHelper.largeFileCandidateByteThreshold
@@ -1222,8 +1233,55 @@ class EditorViewModel {
                 await self.markTabLoadFailed(tabID: tabID)
             }
         }
+        return true
     }
 
+    nonisolated static func isSupportedEditorFileURL(_ url: URL) -> Bool {
+        if url.hasDirectoryPath { return false }
+        let fileName = url.lastPathComponent.lowercased()
+        let ext = url.pathExtension.lowercased()
+
+        if ext.isEmpty {
+            let supportedDotfiles: Set<String> = [
+                ".zshrc", ".zprofile", ".zlogin", ".zlogout",
+                ".bashrc", ".bash_profile", ".bash_login", ".bash_logout",
+                ".profile", ".vimrc", ".env", ".envrc", ".gitconfig"
+            ]
+            return supportedDotfiles.contains(fileName) || fileName.hasPrefix(".env")
+        }
+
+        let knownSupportedExtensions: Set<String> = [
+            "swift", "py", "pyi", "js", "mjs", "cjs", "ts", "tsx", "php", "phtml",
+            "csv", "tsv", "txt", "toml", "ini", "yaml", "yml", "xml", "svg", "plist", "sql",
+            "log", "vim", "ipynb", "java", "kt", "kts", "go", "rb", "rs", "ps1", "psm1",
+            "html", "htm", "ee", "exp", "tmpl", "css", "c", "cpp", "cc", "hpp", "hh", "h",
+            "m", "mm", "cs", "json", "jsonc", "json5", "md", "markdown", "env", "proto",
+            "graphql", "gql", "rst", "conf", "nginx", "cob", "cbl", "cobol", "sh", "bash", "zsh"
+        ]
+        if knownSupportedExtensions.contains(ext) {
+            return true
+        }
+
+        guard let type = UTType(filenameExtension: ext) else { return false }
+        if type.conforms(to: .text) || type.conforms(to: .plainText) || type.conforms(to: .sourceCode) {
+            return true
+        }
+        return false
+    }
+
+#if os(macOS)
+    private func presentUnsupportedFileAlertOnMac(for url: URL) {
+        let title = NSLocalizedString("Can’t Open File", comment: "Unsupported file alert title")
+        let format = NSLocalizedString("The file \"%@\" is not supported and can’t be opened.", comment: "Unsupported file alert message")
+        let alert = NSAlert()
+        alert.messageText = title
+        alert.informativeText = String(format: format, url.lastPathComponent)
+        alert.alertStyle = .warning
+        alert.addButton(withTitle: NSLocalizedString("OK", comment: "Alert confirmation button"))
+        alert.runModal()
+    }
+#endif
+
     private nonisolated static func contentFingerprintValue(_ text: String) -> UInt64 {
         var hasher = Hasher()
         hasher.combine(text)

Neon Vision Editor/UI/ContentView+Actions.swift

@@ -112,24 +112,41 @@ extension ContentView {
         case .success(let urls):
             guard !urls.isEmpty else { return }
             var openedCount = 0
+            var unsupportedCount = 0
             var openedNames: [String] = []
 
             for url in urls {
-                viewModel.openFile(url: url)
-                openedCount += 1
-                openedNames.append(url.lastPathComponent)
+                if viewModel.openFile(url: url) {
+                    openedCount += 1
+                    openedNames.append(url.lastPathComponent)
+                } else {
+                    unsupportedCount += 1
+                    presentUnsupportedFileAlert(for: url)
+                }
             }
 
             guard openedCount > 0 else {
-                findStatusMessage = "Open failed: selected files are no longer available."
+                if unsupportedCount > 0 {
+                    findStatusMessage = "Open failed: unsupported file type."
+                } else {
+                    findStatusMessage = "Open failed: selected files are no longer available."
+                }
                 recordDiagnostic("iOS import failed: no valid files in selection")
                 return
             }
 
             if openedCount == 1, let name = openedNames.first {
-                findStatusMessage = "Opened \(name)"
+                if unsupportedCount > 0 {
+                    findStatusMessage = "Opened \(name) (\(unsupportedCount) unsupported ignored)"
+                } else {
+                    findStatusMessage = "Opened \(name)"
+                }
             } else {
-                findStatusMessage = "Opened \(openedCount) files"
+                if unsupportedCount > 0 {
+                    findStatusMessage = "Opened \(openedCount) files (\(unsupportedCount) unsupported ignored)"
+                } else {
+                    findStatusMessage = "Opened \(openedCount) files"
+                }
             }
             recordDiagnostic("iOS import success count: \(openedCount)")
         case .failure(let error):
@@ -242,10 +259,31 @@ extension ContentView {
         if UIDevice.current.userInterfaceIdiom == .pad && nextValue {
             showProjectStructureSidebar = false
             showCompactProjectSidebarSheet = false
+        } else if UIDevice.current.userInterfaceIdiom == .phone && nextValue {
+            dismissKeyboard()
         }
 #endif
     }
 
+    func closeAllTabsFromToolbar() {
+        let dirtyTabIDs = viewModel.tabs.filter(\.isDirty).map(\.id)
+        for tabID in dirtyTabIDs {
+            guard viewModel.tabs.contains(where: { $0.id == tabID }) else { continue }
+            viewModel.saveFile(tabID: tabID)
+        }
+
+        let tabIDsToClose = viewModel.tabs.map(\.id)
+        for tabID in tabIDsToClose {
+            guard viewModel.tabs.contains(where: { $0.id == tabID }) else { continue }
+            viewModel.closeTab(tabID: tabID)
+        }
+    }
+
+    func requestCloseAllTabsFromToolbar() {
+        guard !viewModel.tabs.isEmpty else { return }
+        showCloseAllTabsDialog = true
+    }
+
     func dismissKeyboard() {
 #if os(iOS)
         UIApplication.shared.sendAction(#selector(UIResponder.resignFirstResponder), to: nil, from: nil, for: nil)
@@ -624,8 +662,9 @@ extension ContentView {
         guard let root = projectRootFolderURL else { return }
         projectTreeRefreshGeneration &+= 1
         let generation = projectTreeRefreshGeneration
+        let supportedOnly = showSupportedProjectFilesOnly
         DispatchQueue.global(qos: .utility).async {
-            let nodes = Self.buildProjectTree(at: root)
+            let nodes = Self.buildProjectTree(at: root, supportedOnly: supportedOnly)
             DispatchQueue.main.async {
                 guard generation == projectTreeRefreshGeneration else { return }
                 guard projectRootFolderURL?.standardizedFileURL == root.standardizedFileURL else { return }
@@ -636,21 +675,27 @@ extension ContentView {
     }
 
     func openProjectFile(url: URL) {
+        guard EditorViewModel.isSupportedEditorFileURL(url) else {
+            presentUnsupportedFileAlert(for: url)
+            return
+        }
         if let existing = viewModel.tabs.first(where: { $0.fileURL?.standardizedFileURL == url.standardizedFileURL }) {
             viewModel.selectTab(id: existing.id)
             return
         }
-        viewModel.openFile(url: url)
+        if !viewModel.openFile(url: url) {
+            presentUnsupportedFileAlert(for: url)
+        }
     }
 
-    private nonisolated static func buildProjectTree(at root: URL) -> [ProjectTreeNode] {
+    private nonisolated static func buildProjectTree(at root: URL, supportedOnly: Bool) -> [ProjectTreeNode] {
         var isDir: ObjCBool = false
         guard FileManager.default.fileExists(atPath: root.path, isDirectory: &isDir), isDir.boolValue else { return [] }
-        return readChildren(of: root, recursive: true)
+        return readChildren(of: root, recursive: true, supportedOnly: supportedOnly)
     }
 
     func loadProjectTreeChildren(for directory: URL) -> [ProjectTreeNode] {
-        Self.readChildren(of: directory, recursive: false)
+        Self.readChildren(of: directory, recursive: false, supportedOnly: showSupportedProjectFilesOnly)
     }
 
     func setProjectFolder(_ folderURL: URL) {
@@ -704,7 +749,7 @@ extension ContentView {
         }
     }
 
-    private nonisolated static func readChildren(of directory: URL, recursive: Bool) -> [ProjectTreeNode] {
+    private nonisolated static func readChildren(of directory: URL, recursive: Bool, supportedOnly: Bool) -> [ProjectTreeNode] {
         if Task.isCancelled { return [] }
         let fm = FileManager.default
         let keys: [URLResourceKey] = [.isDirectoryKey, .isHiddenKey, .nameKey]
@@ -719,7 +764,10 @@ extension ContentView {
             guard let values = try? url.resourceValues(forKeys: Set(keys)) else { continue }
             if values.isHidden == true { continue }
             let isDirectory = values.isDirectory == true
-            let children = (isDirectory && recursive) ? readChildren(of: url, recursive: true) : []
+            if !isDirectory && supportedOnly && !EditorViewModel.isSupportedEditorFileURL(url) {
+                continue
+            }
+            let children = (isDirectory && recursive) ? readChildren(of: url, recursive: true, supportedOnly: supportedOnly) : []
             nodes.append(
                 ProjectTreeNode(
                     url: url,
@@ -731,6 +779,12 @@ extension ContentView {
         return nodes
     }
 
+    private func presentUnsupportedFileAlert(for url: URL) {
+        unsupportedFileName = url.lastPathComponent
+        findStatusMessage = "Unsupported file type."
+        showUnsupportedFileAlert = true
+    }
+
     static func projectFileURLs(from nodes: [ProjectTreeNode]) -> [URL] {
         var results: [URL] = []
         var stack = nodes

Neon Vision Editor/UI/ContentView+Toolbar.swift

@@ -106,6 +106,7 @@ extension ContentView {
         case openFile
         case undo
         case newTab
+        case closeAllTabs
         case saveFile
         case markdownPreview
         case fontDecrease
@@ -130,6 +131,7 @@ extension ContentView {
             .openFile,
             .undo,
             .newTab,
+            .closeAllTabs,
             .saveFile,
             .markdownPreview,
             .fontDecrease,
@@ -178,7 +180,7 @@ extension ContentView {
     }
 
     private var iPadAlwaysVisibleActions: [IPadToolbarAction] {
-        [.openFile, .newTab, .saveFile, .findReplace, .settings]
+        [.openFile, .newTab, .closeAllTabs, .saveFile, .findReplace, .settings]
     }
 
     private var iPadPromotedActionSlotCount: Int {
@@ -341,6 +343,17 @@ extension ContentView {
         .keyboardShortcut("s", modifiers: .command)
     }
 
+    @ViewBuilder
+    private var closeAllTabsControl: some View {
+        Button(action: { requestCloseAllTabsFromToolbar() }) {
+            Image(systemName: "xmark.square")
+        }
+        .disabled(viewModel.tabs.isEmpty)
+        .help("Close All Tabs")
+        .accessibilityLabel("Close all tabs")
+        .accessibilityHint("Closes every open tab")
+    }
+
     @ViewBuilder
     private var fontDecreaseControl: some View {
         Button(action: { adjustEditorFontSize(-1) }) {
@@ -473,6 +486,7 @@ extension ContentView {
         case .openFile: openFileControl
         case .undo: undoControl
         case .newTab: newTabControl
+        case .closeAllTabs: closeAllTabsControl
         case .saveFile: saveFileControl
         case .markdownPreview: markdownPreviewControl
         case .fontDecrease: fontDecreaseControl
@@ -512,6 +526,11 @@ extension ContentView {
                         Button(action: { viewModel.addNewTab() }) {
                             Label("New Tab", systemImage: "plus.square.on.square")
                         }
+                    case .closeAllTabs:
+                        Button(action: { requestCloseAllTabsFromToolbar() }) {
+                            Label("Close All Tabs", systemImage: "xmark.square")
+                        }
+                        .disabled(viewModel.tabs.isEmpty)
                     case .saveFile:
                         Button(action: { saveCurrentTabFromToolbar() }) {
                             Label("Save File", systemImage: "square.and.arrow.down")
@@ -660,6 +679,19 @@ extension ContentView {
             .disabled(viewModel.selectedTab == nil)
             .keyboardShortcut("s", modifiers: .command)
 
+            Button(action: { toggleMarkdownPreviewFromToolbar() }) {
+                Label(
+                    "Markdown Preview",
+                    systemImage: showMarkdownPreviewPane ? "doc.richtext.fill" : "doc.richtext"
+                )
+            }
+            .disabled(currentLanguage != "markdown")
+
+            Button(action: { requestCloseAllTabsFromToolbar() }) {
+                Label("Close All Tabs", systemImage: "xmark.square")
+            }
+            .disabled(viewModel.tabs.isEmpty)
+
             Button(action: { saveCurrentTabAsFromToolbar() }) {
                 Label("Save As…", systemImage: "square.and.arrow.down.on.square")
             }
@@ -915,6 +947,12 @@ extension ContentView {
             }
             .help("New Tab (Cmd+T)")
 
+            Button(action: { requestCloseAllTabsFromToolbar() }) {
+                Label("Close All Tabs", systemImage: "xmark.square")
+                    .foregroundStyle(NeonUIStyle.accentBlue)
+            }
+            .help("Close All Tabs")
+
             Button(action: {
                 saveCurrentTabFromToolbar()
             }) {

Neon Vision Editor/UI/ContentView.swift

@@ -206,6 +206,7 @@ struct ContentView: View {
 #endif
 #if os(iOS)
     @State private var previousKeyboardAccessoryVisibility: Bool? = nil
+    @State private var markdownPreviewSheetDetent: PresentationDetent = .medium
 #endif
 #if os(macOS)
     @AppStorage("SettingsMacTranslucencyMode") private var macTranslucencyModeRaw: String = "balanced"
@@ -227,18 +228,22 @@ struct ContentView: View {
     @State var projectRootFolderURL: URL? = nil
     @State var projectTreeNodes: [ProjectTreeNode] = []
     @State var projectTreeRefreshGeneration: Int = 0
+    @AppStorage("SettingsShowSupportedProjectFilesOnly") var showSupportedProjectFilesOnly: Bool = true
     @State var projectOverrideIndentWidth: Int? = nil
     @State var projectOverrideLineWrapEnabled: Bool? = nil
     @State var showProjectFolderPicker: Bool = false
     @State var projectFolderSecurityURL: URL? = nil
     @State var pendingCloseTabID: UUID? = nil
     @State var showUnsavedCloseDialog: Bool = false
+    @State var showCloseAllTabsDialog: Bool = false
     @State private var showExternalConflictDialog: Bool = false
     @State private var showExternalConflictCompareSheet: Bool = false
     @State private var externalConflictCompareSnapshot: EditorViewModel.ExternalFileComparisonSnapshot?
     @State var showClearEditorConfirmDialog: Bool = false
     @State var showIOSFileImporter: Bool = false
     @State var showIOSFileExporter: Bool = false
+    @State var showUnsupportedFileAlert: Bool = false
+    @State var unsupportedFileName: String = ""
     @State var iosExportDocument: PlainTextDocument = PlainTextDocument(text: "")
     @State var iosExportFilename: String = "Untitled.txt"
     @State var iosExportTabID: UUID? = nil
@@ -381,6 +386,14 @@ struct ContentView: View {
     }
 
     var canShowMarkdownPreviewPane: Bool {
+#if os(iOS)
+        true
+#else
+        true
+#endif
+    }
+
+    private var canShowMarkdownPreviewSplitPane: Bool {
 #if os(iOS)
         canShowMarkdownPreviewOnCurrentDevice
 #else
@@ -388,6 +401,26 @@ struct ContentView: View {
 #endif
     }
 
+#if os(iOS)
+    private var shouldPresentMarkdownPreviewSheetOnIPhone: Bool {
+        UIDevice.current.userInterfaceIdiom == .phone &&
+        showMarkdownPreviewPane &&
+        currentLanguage == "markdown" &&
+        !brainDumpLayoutEnabled
+    }
+
+    private var markdownPreviewSheetPresentationBinding: Binding<Bool> {
+        Binding(
+            get: { shouldPresentMarkdownPreviewSheetOnIPhone },
+            set: { isPresented in
+                if !isPresented {
+                    showMarkdownPreviewPane = false
+                }
+            }
+        )
+    }
+#endif
+
     private var settingsSheetDetents: Set<PresentationDetent> {
 #if os(iOS)
         if UIDevice.current.userInterfaceIdiom == .pad {
@@ -1836,6 +1869,9 @@ struct ContentView: View {
             .onChange(of: showProjectStructureSidebar) { _, _ in
                 persistSessionIfReady()
             }
+            .onChange(of: showSupportedProjectFilesOnly) { _, _ in
+                refreshProjectTree()
+            }
             .onChange(of: showMarkdownPreviewPane) { _, _ in
                 persistSessionIfReady()
             }
@@ -2031,9 +2067,11 @@ struct ContentView: View {
                             rootFolderURL: contentView.projectRootFolderURL,
                             nodes: contentView.projectTreeNodes,
                             selectedFileURL: contentView.viewModel.selectedTab?.fileURL,
+                            showSupportedFilesOnly: contentView.showSupportedProjectFilesOnly,
                             translucentBackgroundEnabled: false,
                             onOpenFile: { contentView.openFileFromToolbar() },
                             onOpenFolder: { contentView.openProjectFolder() },
+                            onToggleSupportedFilesOnly: { contentView.showSupportedProjectFilesOnly = $0 },
                             onOpenProjectFile: { contentView.openProjectFile(url: $0) },
                             onRefreshTree: { contentView.refreshProjectTree() }
                         )
@@ -2048,6 +2086,23 @@ struct ContentView: View {
                     }
                     .presentationDetents([.medium, .large])
                 }
+                .sheet(isPresented: contentView.markdownPreviewSheetPresentationBinding) {
+                    NavigationStack {
+                        contentView.markdownPreviewPane
+                            .navigationTitle("Markdown Preview")
+                            .navigationBarTitleDisplayMode(.inline)
+                            .toolbar {
+                                ToolbarItem(placement: .topBarTrailing) {
+                                    Button("Done") {
+                                        contentView.showMarkdownPreviewPane = false
+                                    }
+                                }
+                            }
+                    }
+                    .presentationDetents([.fraction(0.35), .medium, .large], selection: contentView.$markdownPreviewSheetDetent)
+                    .presentationDragIndicator(.visible)
+                    .presentationContentInteraction(.scrolls)
+                }
 #endif
 #if canImport(UIKit)
                 .sheet(isPresented: contentView.$showProjectFolderPicker) {
@@ -2124,6 +2179,12 @@ struct ContentView: View {
                         Text("This file has unsaved changes.")
                     }
                 }
+                .confirmationDialog("Are you sure you want to close all tabs?", isPresented: contentView.$showCloseAllTabsDialog, titleVisibility: .visible) {
+                    Button("Close All Tabs", role: .destructive) {
+                        contentView.closeAllTabsFromToolbar()
+                    }
+                    Button("Cancel", role: .cancel) { }
+                }
                 .confirmationDialog("File changed on disk", isPresented: contentView.$showExternalConflictDialog, titleVisibility: .visible) {
                     if let conflict = contentView.viewModel.pendingExternalFileConflict {
                         Button("Reload from Disk", role: .destructive) {
@@ -2207,6 +2268,17 @@ struct ContentView: View {
                 } message: {
                     Text("This will remove all text in the current editor.")
                 }
+                .alert("Can’t Open File", isPresented: contentView.$showUnsupportedFileAlert) {
+                    Button("OK", role: .cancel) { }
+                } message: {
+                    Text(String(
+                        format: NSLocalizedString(
+                            "The file \"%@\" is not supported and can’t be opened.",
+                            comment: "Unsupported file alert message"
+                        ),
+                        contentView.unsupportedFileName
+                    ))
+                }
 #if canImport(UIKit)
                 .fileImporter(
                     isPresented: contentView.$showIOSFileImporter,
@@ -3337,7 +3409,7 @@ struct ContentView: View {
                 alignment: brainDumpLayoutEnabled ? .top : .topLeading
             )
 
-            if canShowMarkdownPreviewPane && showMarkdownPreviewPane && currentLanguage == "markdown" && !brainDumpLayoutEnabled {
+            if canShowMarkdownPreviewSplitPane && showMarkdownPreviewPane && currentLanguage == "markdown" && !brainDumpLayoutEnabled {
                 Divider()
                 markdownPreviewPane
                     .frame(minWidth: 280, idealWidth: 420, maxWidth: 680, maxHeight: .infinity)
@@ -3353,9 +3425,11 @@ struct ContentView: View {
                         rootFolderURL: projectRootFolderURL,
                         nodes: projectTreeNodes,
                         selectedFileURL: viewModel.selectedTab?.fileURL,
+                        showSupportedFilesOnly: showSupportedProjectFilesOnly,
                         translucentBackgroundEnabled: enableTranslucentWindow,
                         onOpenFile: { openFileFromToolbar() },
                         onOpenFolder: { openProjectFolder() },
+                        onToggleSupportedFilesOnly: { showSupportedProjectFilesOnly = $0 },
                         onOpenProjectFile: { openProjectFile(url: $0) },
                         onRefreshTree: { refreshProjectTree() }
                     )
@@ -3366,9 +3440,11 @@ struct ContentView: View {
                     rootFolderURL: projectRootFolderURL,
                     nodes: projectTreeNodes,
                     selectedFileURL: viewModel.selectedTab?.fileURL,
+                    showSupportedFilesOnly: showSupportedProjectFilesOnly,
                     translucentBackgroundEnabled: enableTranslucentWindow,
                     onOpenFile: { openFileFromToolbar() },
                     onOpenFolder: { openProjectFolder() },
+                    onToggleSupportedFilesOnly: { showSupportedProjectFilesOnly = $0 },
                     onOpenProjectFile: { openProjectFile(url: $0) },
                     onRefreshTree: { refreshProjectTree() }
                 )
@@ -3432,7 +3508,7 @@ struct ContentView: View {
             )
         }
         .onChange(of: horizontalSizeClass) { _, newClass in
-            if newClass != .regular && showMarkdownPreviewPane {
+            if UIDevice.current.userInterfaceIdiom == .pad && newClass != .regular && showMarkdownPreviewPane {
                 showMarkdownPreviewPane = false
             }
         }

Neon Vision Editor/UI/PanelsAndHelpers.swift

@@ -337,12 +337,12 @@ struct WelcomeTourView: View {
     private let pages: [TourPage] = [
         TourPage(
             title: "What’s New in This Release",
-            subtitle: "Major changes since v0.4.34:",
+            subtitle: "Major changes since v0.5.0:",
             bullets: [
-                "Added updater staging hardening with retry/fallback behavior and staged-bundle integrity checks.",
-                "Added explicit accessibility labels/hints for key toolbar actions and updater log/progress controls.",
-                "Added a 0.5.0 quality roadmap milestone with focused issues for updater reliability, accessibility, and release gating.",
-                "Improved CSV handling by enabling fast syntax profile earlier and for long-line CSV files to reduce freeze risk."
+                "Added bulk `Close All Tabs` actions to toolbar surfaces (macOS, iOS, iPadOS), including a confirmation step before closing.",
+                "Added project-structure quick actions to expand all folders or collapse all folders in one step.",
+                "Added six vivid neon syntax themes with distinct color profiles: `Neon Voltage`, `Laserwave`, `Cyber Lime`, `Plasma Storm`, `Inferno Neon`, and `Ultraviolet Flux`.",
+                "Added a lock-safe cross-platform build matrix helper script (`scripts/ci/build_platform_matrix.sh`) to run macOS + iOS Simulator + iPad Simulator builds sequentially."
             ],
             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/SidebarViews.swift

@@ -358,9 +358,11 @@ struct ProjectStructureSidebarView: View {
     let rootFolderURL: URL?
     let nodes: [ProjectTreeNode]
     let selectedFileURL: URL?
+    let showSupportedFilesOnly: Bool
     let translucentBackgroundEnabled: Bool
     let onOpenFile: () -> Void
     let onOpenFolder: () -> Void
+    let onToggleSupportedFilesOnly: (Bool) -> Void
     let onOpenProjectFile: (URL) -> Void
     let onRefreshTree: () -> Void
     @State private var expandedDirectories: Set<String> = []
@@ -392,6 +394,30 @@ struct ProjectStructureSidebarView: View {
                 }
                 .buttonStyle(.borderless)
                 .help("Refresh Folder Tree")
+
+                Menu {
+                    Button {
+                        onToggleSupportedFilesOnly(!showSupportedFilesOnly)
+                    } label: {
+                        Label(
+                            "Show Supported Files Only",
+                            systemImage: showSupportedFilesOnly ? "checkmark.circle.fill" : "circle"
+                        )
+                    }
+                    Divider()
+                    Button("Expand All") {
+                        expandAllDirectories()
+                    }
+                    Button("Collapse All") {
+                        collapseAllDirectories()
+                    }
+                } label: {
+                    Image(systemName: "arrow.up.arrow.down.circle")
+                }
+                .buttonStyle(.borderless)
+                .help("Expand or Collapse All")
+                .accessibilityLabel("Expand or collapse all folders")
+                .accessibilityHint("Expands or collapses all folders in the project tree")
             }
             .padding(.horizontal, 10)
             .padding(.top, 10)
@@ -533,6 +559,23 @@ struct ProjectStructureSidebarView: View {
 #endif
     }
 
+    private func expandAllDirectories() {
+        expandedDirectories = allDirectoryNodeIDs(in: nodes)
+    }
+
+    private func collapseAllDirectories() {
+        expandedDirectories.removeAll()
+    }
+
+    private func allDirectoryNodeIDs(in treeNodes: [ProjectTreeNode]) -> Set<String> {
+        var result: Set<String> = []
+        for node in treeNodes where node.isDirectory {
+            result.insert(node.id)
+            result.formUnion(allDirectoryNodeIDs(in: node.children))
+        }
+        return result
+    }
+
     private func projectNodeView(_ node: ProjectTreeNode, level: Int) -> AnyView {
         if node.isDirectory {
             return AnyView(

Neon Vision Editor/UI/ThemeSettings.swift

@@ -155,6 +155,12 @@ private func adjustedSyntaxColor(
 let editorThemeNames: [String] = [
     "Neon Glow",
     "Neon Flow",
+    "Neon Voltage",
+    "Laserwave",
+    "Cyber Lime",
+    "Plasma Storm",
+    "Inferno Neon",
+    "Ultraviolet Flux",
     "Custom",
     "Dracula",
     "One Dark Pro",
@@ -221,6 +227,90 @@ private func paletteForThemeName(_ name: String, defaults: UserDefaults) -> Them
                 property: Color(red: 0.92, green: 0.05, blue: 0.91),
                 builtin: Color(red: 0.96, green: 0.20, blue: 0.04)
             )
+        case "Neon Voltage":
+            return ThemePalette(
+                text: Color(red: 0.95, green: 0.98, blue: 1.00),
+                background: Color(red: 0.04, green: 0.06, blue: 0.09),
+                cursor: Color(red: 0.00, green: 0.92, blue: 1.00),
+                selection: Color(red: 0.12, green: 0.20, blue: 0.30),
+                keyword: Color(red: 0.00, green: 0.92, blue: 1.00),
+                string: Color(red: 0.35, green: 1.00, blue: 0.72),
+                number: Color(red: 1.00, green: 0.72, blue: 0.10),
+                comment: Color(red: 0.48, green: 0.56, blue: 0.68),
+                type: Color(red: 0.74, green: 0.52, blue: 1.00),
+                property: Color(red: 0.32, green: 0.88, blue: 1.00),
+                builtin: Color(red: 1.00, green: 0.34, blue: 0.74)
+            )
+        case "Laserwave":
+            return ThemePalette(
+                text: Color(red: 0.96, green: 0.93, blue: 1.00),
+                background: Color(red: 0.10, green: 0.05, blue: 0.14),
+                cursor: Color(red: 0.98, green: 0.24, blue: 0.88),
+                selection: Color(red: 0.25, green: 0.15, blue: 0.34),
+                keyword: Color(red: 1.00, green: 0.28, blue: 0.86),
+                string: Color(red: 0.22, green: 0.94, blue: 1.00),
+                number: Color(red: 1.00, green: 0.60, blue: 0.30),
+                comment: Color(red: 0.60, green: 0.52, blue: 0.72),
+                type: Color(red: 0.65, green: 0.72, blue: 1.00),
+                property: Color(red: 0.36, green: 0.98, blue: 0.84),
+                builtin: Color(red: 1.00, green: 0.42, blue: 0.56)
+            )
+        case "Cyber Lime":
+            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),
+                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),
+                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),
+                builtin: Color(red: 1.00, green: 0.48, blue: 0.40)
+            )
+        case "Plasma Storm":
+            return ThemePalette(
+                text: Color(red: 0.95, green: 0.95, blue: 1.00),
+                background: Color(red: 0.06, green: 0.05, blue: 0.10),
+                cursor: Color(red: 0.54, green: 0.44, blue: 1.00),
+                selection: Color(red: 0.16, green: 0.12, blue: 0.30),
+                keyword: Color(red: 0.58, green: 0.46, blue: 1.00),
+                string: Color(red: 0.24, green: 0.90, blue: 1.00),
+                number: Color(red: 1.00, green: 0.52, blue: 0.20),
+                comment: Color(red: 0.54, green: 0.50, blue: 0.68),
+                type: Color(red: 0.80, green: 0.54, blue: 1.00),
+                property: Color(red: 0.66, green: 0.78, blue: 1.00),
+                builtin: Color(red: 1.00, green: 0.30, blue: 0.66)
+            )
+        case "Inferno Neon":
+            return ThemePalette(
+                text: Color(red: 1.00, green: 0.94, blue: 0.90),
+                background: Color(red: 0.11, green: 0.05, blue: 0.03),
+                cursor: Color(red: 1.00, green: 0.46, blue: 0.08),
+                selection: Color(red: 0.28, green: 0.12, blue: 0.08),
+                keyword: Color(red: 1.00, green: 0.38, blue: 0.16),
+                string: Color(red: 1.00, green: 0.74, blue: 0.24),
+                number: Color(red: 1.00, green: 0.26, blue: 0.48),
+                comment: Color(red: 0.70, green: 0.54, blue: 0.46),
+                type: Color(red: 1.00, green: 0.56, blue: 0.20),
+                property: Color(red: 1.00, green: 0.70, blue: 0.32),
+                builtin: Color(red: 1.00, green: 0.18, blue: 0.30)
+            )
+        case "Ultraviolet Flux":
+            return ThemePalette(
+                text: Color(red: 0.96, green: 0.93, blue: 1.00),
+                background: Color(red: 0.08, green: 0.04, blue: 0.12),
+                cursor: Color(red: 0.84, green: 0.36, blue: 1.00),
+                selection: Color(red: 0.21, green: 0.12, blue: 0.30),
+                keyword: Color(red: 0.84, green: 0.36, blue: 1.00),
+                string: Color(red: 0.32, green: 0.98, blue: 0.96),
+                number: Color(red: 1.00, green: 0.62, blue: 0.24),
+                comment: Color(red: 0.60, green: 0.52, blue: 0.72),
+                type: Color(red: 1.00, green: 0.38, blue: 0.86),
+                property: Color(red: 0.68, green: 0.72, blue: 1.00),
+                builtin: Color(red: 1.00, green: 0.28, blue: 0.56)
+            )
         case "Dracula":
             return ThemePalette(
                 text: Color(red: 0.97, green: 0.97, blue: 0.95),
@@ -508,7 +598,18 @@ func currentEditorTheme(colorScheme: ColorScheme) -> EditorTheme {
         return Color(red: 0.90, green: 0.90, blue: 0.90)
     }()
 
-    let profile: SyntaxAdjustmentProfile = (name == "Neon Glow") ? .neonRaw : .standard
+    let profile: SyntaxAdjustmentProfile = {
+        let vividNeonThemes: Set<String> = [
+            "Neon Glow",
+            "Neon Voltage",
+            "Laserwave",
+            "Cyber Lime",
+            "Plasma Storm",
+            "Inferno Neon",
+            "Ultraviolet Flux"
+        ]
+        return vividNeonThemes.contains(name) ? .neonRaw : .standard
+    }()
     let keyword = adjustedSyntaxColor(
         palette.keyword,
         colorScheme: colorScheme,

Neon Vision Editor/de.lproj/Localizable.strings

@@ -262,3 +262,8 @@
 "Refresh Folder Tree" = "Ordnerbaum aktualisieren";
 "Reset to Default" = "Auf Standard zurücksetzen";
 "Use Default Template" = "Standardvorlage verwenden";
+"Close All Tabs" = "Alle Tabs schließen";
+"Are you sure you want to close all tabs?" = "Möchtest du wirklich alle Tabs schließen?";
+"Can’t Open File" = "Datei kann nicht geöffnet werden";
+"The file \"%@\" is not supported and can’t be opened." = "Die Datei \"%@\" wird nicht unterstützt und kann nicht geöffnet werden.";
+"Show Supported Files Only" = "Nur unterstützte Dateien anzeigen";

Neon Vision Editor/en.lproj/Localizable.strings

@@ -163,3 +163,8 @@
 "The application does not automatically transmit full project folders, unrelated files, entire file system contents, contact data, location data, or device-specific identifiers." = "The application does not automatically transmit full project folders, unrelated files, entire file system contents, contact data, location data, or device-specific identifiers.";
 "Authentication credentials (API keys) for external AI providers are stored securely in the system keychain and are transmitted only to the user-selected provider for the purpose of completing the AI request." = "Authentication credentials (API keys) for external AI providers are stored securely in the system keychain and are transmitted only to the user-selected provider for the purpose of completing the AI request.";
 "All external communication is performed over encrypted HTTPS connections. If AI completion is disabled, the application performs no external AI-related network requests." = "All external communication is performed over encrypted HTTPS connections. If AI completion is disabled, the application performs no external AI-related network requests.";
+"Close All Tabs" = "Close All Tabs";
+"Are you sure you want to close all tabs?" = "Are you sure you want to close all tabs?";
+"Can’t Open File" = "Can’t Open File";
+"The file \"%@\" is not supported and can’t be opened." = "The file \"%@\" is not supported and can’t be opened.";
+"Show Supported Files Only" = "Show Supported Files Only";

README.md

@@ -36,7 +36,7 @@
 
 
 > Status: **active release**  
-> Latest release: **v0.5.0**
+> Latest release: **v0.5.1**
 > Platform target: **macOS 26 (Tahoe)** compatible with **macOS Sequoia**
 > Apple Silicon: tested / Intel: not tested
 > Last updated (README): **2026-03-08** for release line **v0.5.0**
@@ -125,7 +125,7 @@ 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: **v0.5.0**
+- Latest release: **v0.5.1**
 - Channel: **Stable**
 - Architecture: Apple Silicon (Intel not tested)
 
@@ -398,6 +398,14 @@ All shortcuts use `Cmd` (`⌘`). iPad/iOS require a hardware keyboard.
 
 ## Changelog
 
+### v0.5.1 (summary)
+
+- Added bulk `Close All Tabs` actions to toolbar surfaces (macOS, iOS, iPadOS), including a confirmation step before closing.
+- Added project-structure quick actions to expand all folders or collapse all folders in one step.
+- Added six vivid neon syntax themes with distinct color profiles: `Neon Voltage`, `Laserwave`, `Cyber Lime`, `Plasma Storm`, `Inferno Neon`, and `Ultraviolet Flux`.
+- Added a lock-safe cross-platform build matrix helper script (`scripts/ci/build_platform_matrix.sh`) to run macOS + iOS Simulator + iPad Simulator builds sequentially.
+- Added iPhone Markdown preview as a bottom sheet with toolbar toggle and resizable detents for Apple-guideline-compliant height control.
+
 ### v0.5.0 (summary)
 
 - Added updater staging hardening with retry/fallback behavior and staged-bundle integrity checks.
@@ -414,14 +422,6 @@ All shortcuts use `Cmd` (`⌘`). iPad/iOS require a hardware keyboard.
 - iOS/iPad settings cards were visually simplified by removing accent stripe lines across tabs.
 - Wrapped-line numbering on iOS/iPad now uses sticky logical line numbers instead of repeating on every visual wrap row.
 
-### v0.4.33 (summary)
-
-- Added performance instrumentation for startup first-paint/first-keystroke and file-open latency in debug builds.
-- Added iPad hardware-keyboard shortcut bridging for New Tab, Open, Save, Find, Find in Files, and Command Palette.
-- Added local runtime reliability monitoring with previous-run crash bucketing and main-thread stall watchdog logging in debug.
-- Improved command palette behavior with fuzzy matching, command entries, and recent-selection ranking.
-- Improved large-file responsiveness by forcing throttle mode during load/import and reevaluating after idle.
-
 Full release history: [`CHANGELOG.md`](CHANGELOG.md)
 
 ## Known Limitations
@@ -441,12 +441,12 @@ Full release history: [`CHANGELOG.md`](CHANGELOG.md)
 
 ## Release Integrity
 
-- Tag: `v0.5.0`
+- Tag: `v0.5.1`
 - Tagged commit: `1c31306`
 - Verify local tag target:
 
 ```bash
-git rev-parse --verify v0.5.0
+git rev-parse --verify v0.5.1
 ```
 
 - Verify downloaded artifact checksum locally:
@@ -485,6 +485,12 @@ cd Neon-Vision-Editor
 xcodebuild -project "Neon Vision Editor.xcodeproj" -scheme "Neon Vision Editor" -destination 'platform=macOS,name=My Mac' build
 ```
 
+Lock-safe cross-platform verification (sequential macOS + iOS Simulator + iPad Simulator):
+
+```bash
+scripts/ci/build_platform_matrix.sh
+```
+
 ## Support & Feedback
 
 - Questions and ideas: [GitHub Discussions](https://github.com/h3pdesign/Neon-Vision-Editor/discussions)

scripts/ci/build_platform_matrix.sh

@@ -0,0 +1,132 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/../.." && pwd)"
+cd "$ROOT"
+
+PROJECT="${PROJECT:-Neon Vision Editor.xcodeproj}"
+SCHEME="${SCHEME:-Neon Vision Editor}"
+CONFIGURATION="${CONFIGURATION:-Debug}"
+CODE_SIGNING_ALLOWED="${CODE_SIGNING_ALLOWED:-NO}"
+LOCK_DIR="${LOCK_DIR:-/tmp/nve_xcodebuild.lock}"
+DERIVED_DATA_ROOT="${DERIVED_DATA_ROOT:-$ROOT/.DerivedDataMatrix}"
+RETRIES="${RETRIES:-2}"
+
+usage() {
+  cat <<'EOF'
+Usage: scripts/ci/build_platform_matrix.sh [--keep-derived-data]
+
+Runs build verification sequentially for:
+  1) macOS
+  2) iOS Simulator
+  3) iPad Simulator target family
+
+Environment overrides:
+  PROJECT, SCHEME, CONFIGURATION, CODE_SIGNING_ALLOWED
+  LOCK_DIR, DERIVED_DATA_ROOT, RETRIES
+EOF
+}
+
+KEEP_DERIVED_DATA=0
+for arg in "$@"; do
+  case "$arg" in
+    --keep-derived-data) KEEP_DERIVED_DATA=1 ;;
+    -h|--help)
+      usage
+      exit 0
+      ;;
+    *)
+      echo "Unknown argument: $arg" >&2
+      usage >&2
+      exit 1
+      ;;
+  esac
+done
+
+wait_for_lock() {
+  local attempts=0
+  while ! mkdir "$LOCK_DIR" 2>/dev/null; do
+    attempts=$((attempts + 1))
+    if [[ "$attempts" -ge 120 ]]; then
+      echo "Timed out waiting for build lock: $LOCK_DIR" >&2
+      exit 1
+    fi
+    sleep 1
+  done
+}
+
+release_lock() {
+  rmdir "$LOCK_DIR" 2>/dev/null || true
+}
+
+cleanup() {
+  release_lock
+  if [[ "$KEEP_DERIVED_DATA" -eq 0 ]]; then
+    rm -rf "$DERIVED_DATA_ROOT"
+  fi
+}
+
+trap cleanup EXIT
+
+is_lock_error() {
+  local log_file="$1"
+  rg -q "database is locked|build system has crashed|unable to attach DB|unexpected service error" "$log_file"
+}
+
+run_build() {
+  local name="$1"
+  shift
+  local platform_slug
+  platform_slug="$(echo "$name" | tr '[:upper:] ' '[:lower:]_')"
+  local derived_data_path="${DERIVED_DATA_ROOT}/${platform_slug}"
+  local log_file="/tmp/nve_build_${platform_slug}.log"
+  local attempt=0
+
+  rm -rf "$derived_data_path"
+
+  while :; do
+    attempt=$((attempt + 1))
+    echo "[$name] Attempt ${attempt}/${RETRIES}"
+
+    if xcodebuild \
+      -project "$PROJECT" \
+      -scheme "$SCHEME" \
+      -configuration "$CONFIGURATION" \
+      -derivedDataPath "$derived_data_path" \
+      CODE_SIGNING_ALLOWED="$CODE_SIGNING_ALLOWED" \
+      "$@" >"$log_file" 2>&1; then
+      echo "[$name] BUILD SUCCEEDED"
+      return 0
+    fi
+
+    if [[ "$attempt" -lt "$RETRIES" ]] && is_lock_error "$log_file"; then
+      echo "[$name] Detected lock/build-system transient. Retrying..."
+      sleep 2
+      rm -rf "$derived_data_path"
+      continue
+    fi
+
+    echo "[$name] BUILD FAILED (see $log_file)" >&2
+    tail -n 40 "$log_file" >&2 || true
+    return 1
+  done
+}
+
+wait_for_lock
+
+run_build "macOS" \
+  -destination "generic/platform=macOS" \
+  build
+
+run_build "iOS Simulator" \
+  -sdk iphonesimulator \
+  -destination "generic/platform=iOS Simulator" \
+  build
+
+run_build "iPad Simulator" \
+  -sdk iphonesimulator \
+  -destination "generic/platform=iOS Simulator" \
+  TARGETED_DEVICE_FAMILY=2 \
+  build
+
+echo "Build matrix completed successfully."