fix: guard Windows-only setDarkTitleBar and fix deprecated addAction arg order

- BUG-1 (HIGH): Replace dangling QVector reference with local copies in applyTypePopupResult
- BUG-2 (MEDIUM): Add missing upper-bound check in EditTarget::Name handler
- BUG-5 (LOW): Remove redundant unconditional refresh() at end of applyTypePopupResult
- BUG-6 (LOW): Use QPointer for m_cachedPopup to auto-null on parent destruction
- BUG-7 (LOW): Rewrite materializeRefChildren to use undo macro (cmd::Insert + cmd::Collapse)
- BUG-8 (LOW): Guard against integer overflow in byteSize() and clamp arrayLen/strLen in fromJson
- BUG-9 (LOW): Use QPair<uint64_t,uint64_t> key in collectPointerRanges visited set

.github/workflows/build.yml

@@ -0,0 +1,153 @@
+name: Build
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+permissions:
+  contents: write
+
+jobs:
+  windows:
+    runs-on: windows-latest
+
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          submodules: recursive
+
+      - name: Install Qt6
+        uses: jurplel/install-qt-action@v4
+        with:
+          version: '6.8.1'
+          arch: 'win64_msvc2022_64'
+          cache: true
+          aqtversion: '==3.1.21'
+
+      - uses: ilammy/msvc-dev-cmd@v1
+        with:
+          arch: x64
+
+      - name: Configure
+        run: cmake -B build -G Ninja -DCMAKE_BUILD_TYPE=Release
+
+      - name: Build
+        run: cmake --build build
+
+      - name: Test
+        run: ctest --test-dir build --output-on-failure --exclude-regex "test_editor|test_windbg_provider|test_com_security"
+
+      - name: Upload artifact
+        uses: actions/upload-artifact@v4
+        if: always()
+        with:
+          name: Reclass-Windows-x64
+          path: |
+            build/Reclass.exe
+            build/ReclassMcpBridge.exe
+            build/Plugins/
+            build/*.dll
+            build/platforms/
+            build/styles/
+            build/imageformats/
+            build/iconengines/
+            build/themes/
+            build/screenshot.png
+
+      - name: Package release zip
+        if: github.event_name == 'push' && github.ref == 'refs/heads/main'
+        shell: bash
+        run: |
+          mkdir -p release
+          cp build/Reclass.exe release/
+          cp build/ReclassMcpBridge.exe release/
+          cp build/*.dll release/ 2>/dev/null || true
+          cp -r build/platforms release/ 2>/dev/null || true
+          cp -r build/styles release/ 2>/dev/null || true
+          cp -r build/imageformats release/ 2>/dev/null || true
+          cp -r build/iconengines release/ 2>/dev/null || true
+          cp -r build/Plugins release/ 2>/dev/null || true
+          cp -r build/themes release/ 2>/dev/null || true
+          cp build/screenshot.png release/ 2>/dev/null || true
+          cd release && 7z a ../win64-reclass-latest.zip *
+
+      - name: Update win64 release
+        if: github.event_name == 'push' && github.ref == 'refs/heads/main'
+        uses: softprops/action-gh-release@v2
+        with:
+          tag_name: latest-win64
+          name: win64
+          body: |
+            Windows x64 build from main branch.
+            Commit: ${{ github.sha }}
+          prerelease: true
+          files: win64-reclass-latest.zip
+          make_latest: false
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+  linux:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          submodules: recursive
+
+      - name: Install Qt6
+        uses: jurplel/install-qt-action@v4
+        with:
+          version: '6.8.1'
+          cache: true
+          aqtversion: '==3.1.21'
+
+      - name: Install dependencies
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y ninja-build libgl1-mesa-dev
+
+      - name: Configure
+        run: cmake -B build -G Ninja -DCMAKE_BUILD_TYPE=Release
+
+      - name: Build
+        run: cmake --build build
+
+      - name: Test
+        run: xvfb-run ctest --test-dir build --output-on-failure --exclude-regex "test_editor"
+        env:
+          QT_QPA_PLATFORM: offscreen
+
+      - name: Upload artifact
+        uses: actions/upload-artifact@v4
+        if: always()
+        with:
+          name: Reclass-Linux-x64
+          path: |
+            build/Reclass
+            build/ReclassMcpBridge
+
+      - name: Package release tarball
+        if: github.event_name == 'push' && github.ref == 'refs/heads/main'
+        run: |
+          mkdir -p release
+          cp build/Reclass release/
+          cp build/ReclassMcpBridge release/
+          cp -r build/themes release/ 2>/dev/null || true
+          tar czf linux64-reclass-latest.tar.gz -C release .
+
+      - name: Update linux64 release
+        if: github.event_name == 'push' && github.ref == 'refs/heads/main'
+        uses: softprops/action-gh-release@v2
+        with:
+          tag_name: latest-linux64
+          name: linux64
+          body: |
+            Linux x64 build from main branch.
+            Commit: ${{ github.sha }}
+          prerelease: true
+          files: linux64-reclass-latest.tar.gz
+          make_latest: false
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

CMakeLists.txt

@@ -60,6 +60,10 @@ add_executable(Reclass
     src/themes/themeeditor.h
     src/themes/themeeditor.cpp
     src/mainwindow.h
+    src/optionsdialog.h
+    src/optionsdialog.cpp
+    src/titlebar.h
+    src/titlebar.cpp
     src/mcp/mcp_bridge.h
     src/mcp/mcp_bridge.cpp
     $<$<PLATFORM_ID:Windows>:src/app.rc>
@@ -83,14 +87,24 @@ endif()
 add_executable(ReclassMcpBridge tools/rcx-mcp-stdio.cpp)
 target_link_libraries(ReclassMcpBridge PRIVATE ${QT}::Core ${QT}::Network)
 
+# Copy built-in theme JSON files to build directory
+file(GLOB _theme_files "${CMAKE_SOURCE_DIR}/src/themes/defaults/*.json")
+file(MAKE_DIRECTORY "${CMAKE_BINARY_DIR}/themes")
+foreach(_tf ${_theme_files})
+    get_filename_component(_name ${_tf} NAME)
+    configure_file(${_tf} "${CMAKE_BINARY_DIR}/themes/${_name}" COPYONLY)
+endforeach()
+
 include(deploy)
 
-add_custom_target(screenshot ALL
-    COMMAND Reclass --screenshot ${CMAKE_BINARY_DIR}/screenshot.png
-    DEPENDS Reclass deploy
-    WORKING_DIRECTORY ${CMAKE_BINARY_DIR}
-    COMMENT "Capturing UI screenshot with class open..."
-)
+if(TARGET deploy)
+    add_custom_target(screenshot ALL
+        COMMAND Reclass --screenshot ${CMAKE_BINARY_DIR}/screenshot.png
+        DEPENDS Reclass deploy
+        WORKING_DIRECTORY ${CMAKE_BINARY_DIR}
+        COMMENT "Capturing UI screenshot with class open..."
+    )
+endif()
 
 set(_combine_script "${CMAKE_BINARY_DIR}/combine_sources.cmake")
 file(WRITE ${_combine_script} "
@@ -247,6 +261,23 @@ if(BUILD_TESTING)
     target_link_libraries(test_theme PRIVATE ${QT}::Widgets ${QT}::Test)
     add_test(NAME test_theme COMMAND test_theme)
 
+    if(WIN32)
+        add_executable(test_windbg_provider tests/test_windbg_provider.cpp
+            plugins/WinDbgMemory/WinDbgMemoryPlugin.cpp)
+        target_include_directories(test_windbg_provider PRIVATE src plugins/WinDbgMemory)
+        target_link_libraries(test_windbg_provider PRIVATE
+            ${QT}::Widgets ${QT}::Concurrent ${QT}::Test dbgeng ole32)
+        add_test(NAME test_windbg_provider COMMAND test_windbg_provider)
+    endif()
+
+    # Standalone test: proves whether CoInitializeSecurity is needed for DebugConnect
+    # Requires a running WinDbg debug server on port 5055
+    if(WIN32)
+        add_executable(test_com_security tests/test_com_security.cpp)
+        target_link_libraries(test_com_security PRIVATE dbgeng ole32 version)
+        add_test(NAME test_com_security COMMAND test_com_security)
+    endif()
+
     # Deploy Qt runtime DLLs for tests (run windeployqt on a representative test exe
     # that links the broadest set of Qt modules; all test exes share the same output dir)
     if(TARGET ${QT}::windeployqt)
@@ -260,4 +291,7 @@ if(BUILD_TESTING)
         )
     endif()
 endif()
-add_subdirectory(plugins/ProcessMemory)
+if(WIN32)
+    add_subdirectory(plugins/ProcessMemory)
+    add_subdirectory(plugins/WinDbgMemory)
+endif()

plugins/WinDbgMemory/CMakeLists.txt

@@ -0,0 +1,34 @@
+cmake_minimum_required(VERSION 3.20)
+project(WinDbgMemoryPlugin LANGUAGES CXX)
+
+set(CMAKE_CXX_STANDARD 17)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+
+# Qt is found by the parent project; QT variable (Qt5 or Qt6) is inherited
+
+set(CMAKE_AUTOMOC ON)
+set(CMAKE_AUTORCC ON)
+set(CMAKE_AUTOUIC ON)
+
+# Plugin sources
+set(PLUGIN_SOURCES
+    WinDbgMemoryPlugin.h
+    WinDbgMemoryPlugin.cpp
+)
+
+# Create shared library (DLL)
+add_library(WinDbgMemoryPlugin SHARED ${PLUGIN_SOURCES})
+
+# Link Qt + DbgEng
+target_link_libraries(WinDbgMemoryPlugin PRIVATE ${QT}::Widgets dbgeng ole32)
+
+# Include directories
+target_include_directories(WinDbgMemoryPlugin PRIVATE
+    ${CMAKE_CURRENT_SOURCE_DIR}/../../src
+)
+
+# Output to Plugins folder
+set_target_properties(WinDbgMemoryPlugin PROPERTIES
+    LIBRARY_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/Plugins"
+    RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/Plugins"
+)

plugins/WinDbgMemory/WinDbgMemoryPlugin.cpp

@@ -0,0 +1,510 @@
+#include "WinDbgMemoryPlugin.h"
+
+#include <QStyle>
+#include <QApplication>
+#include <QMessageBox>
+#include <QDialog>
+#include <QVBoxLayout>
+#include <QHBoxLayout>
+#include <QLineEdit>
+#include <QPushButton>
+#include <QLabel>
+#include <QDebug>
+#include <QClipboard>
+#include <QGuiApplication>
+
+#ifdef _WIN32
+#include <windows.h>
+#include <initguid.h>
+#include <dbgeng.h>
+#pragma comment(lib, "dbgeng.lib")
+#endif
+
+// ──────────────────────────────────────────────────────────────────────────
+// Thread dispatch helper
+// ──────────────────────────────────────────────────────────────────────────
+
+template<typename Fn>
+void WinDbgMemoryProvider::dispatchToOwner(Fn&& fn) const
+{
+    if (!m_dispatcher) { fn(); return; }
+
+    if (QThread::currentThread() == m_dispatcher->thread()) {
+        // Already on the owning thread — call directly
+        fn();
+    } else {
+        // Marshal to the owning thread and block until done
+        QMetaObject::invokeMethod(m_dispatcher, std::forward<Fn>(fn),
+                                  Qt::BlockingQueuedConnection);
+    }
+}
+
+// ──────────────────────────────────────────────────────────────────────────
+// WinDbgMemoryProvider implementation
+// ──────────────────────────────────────────────────────────────────────────
+
+WinDbgMemoryProvider::WinDbgMemoryProvider(const QString& target)
+{
+    // Create a dedicated thread for all DbgEng COM operations.
+    // DbgEng's remote transport (TCP/named-pipe) is thread-affine — all
+    // calls must happen on the thread that called DebugConnect/DebugCreate.
+    // A private thread with its own event loop guarantees:
+    //   1. dispatchToOwner() works from any calling thread (main, thread-pool, etc.)
+    //   2. No deadlock — the DbgEng thread is never blocked by the caller
+    m_dbgThread = new QThread();
+    m_dbgThread->setObjectName(QStringLiteral("DbgEngThread"));
+    m_dbgThread->start();
+
+    m_dispatcher = new DbgEngDispatcher();
+    m_dispatcher->moveToThread(m_dbgThread);
+
+#ifdef _WIN32
+    // Run all DbgEng initialization on the dedicated thread.
+    // BlockingQueuedConnection blocks us until the lambda finishes,
+    // so member variables written inside are visible after the call.
+    dispatchToOwner([this, &target]() {
+        HRESULT hr;
+
+        qDebug() << "[WinDbg] Opening target:" << target
+                 << "on DbgEng thread" << QThread::currentThread();
+
+        if (target.startsWith("tcp:", Qt::CaseInsensitive)
+            || target.startsWith("npipe:", Qt::CaseInsensitive))
+        {
+            // ── Remote: connect to existing WinDbg debug server ──
+            QByteArray connUtf8 = target.toUtf8();
+            qDebug() << "[WinDbg] DebugConnect:" << target;
+            hr = DebugConnect(connUtf8.constData(), IID_IDebugClient, (void**)&m_client);
+            qDebug() << "[WinDbg] DebugConnect hr=" << Qt::hex << (unsigned long)hr
+                     << "client=" << (void*)m_client;
+            if (FAILED(hr) || !m_client) {
+                qWarning() << "[WinDbg] DebugConnect FAILED hr=0x" << Qt::hex << (unsigned long)hr;
+                return;
+            }
+            m_isRemote = true;
+        }
+        else
+        {
+            // ── Local: create debug client for pid/dump ──
+            hr = DebugCreate(IID_IDebugClient, (void**)&m_client);
+            qDebug() << "[WinDbg] DebugCreate hr=" << Qt::hex << (unsigned long)hr
+                     << "client=" << (void*)m_client;
+            if (FAILED(hr) || !m_client) {
+                qWarning() << "[WinDbg] DebugCreate FAILED hr=0x" << Qt::hex << (unsigned long)hr;
+                return;
+            }
+
+            if (target.startsWith("pid:", Qt::CaseInsensitive))
+            {
+                bool ok = false;
+                ULONG pid = target.mid(4).trimmed().toULong(&ok);
+                if (!ok || pid == 0) {
+                    qWarning() << "[WinDbg] Invalid PID in target:" << target;
+                    cleanup();
+                    return;
+                }
+
+                qDebug() << "[WinDbg] Attaching to PID" << pid << "(non-invasive)";
+                hr = m_client->AttachProcess(
+                    0, pid,
+                    DEBUG_ATTACH_NONINVASIVE | DEBUG_ATTACH_NONINVASIVE_NO_SUSPEND);
+                qDebug() << "[WinDbg] AttachProcess hr=" << Qt::hex << (unsigned long)hr;
+                if (FAILED(hr)) {
+                    qWarning() << "[WinDbg] AttachProcess FAILED";
+                    cleanup();
+                    return;
+                }
+            }
+            else if (target.startsWith("dump:", Qt::CaseInsensitive))
+            {
+                QString path = target.mid(5).trimmed();
+                QByteArray pathUtf8 = path.toUtf8();
+
+                qDebug() << "[WinDbg] Opening dump file:" << path;
+                hr = m_client->OpenDumpFile(pathUtf8.constData());
+                qDebug() << "[WinDbg] OpenDumpFile hr=" << Qt::hex << (unsigned long)hr;
+                if (FAILED(hr)) {
+                    qWarning() << "[WinDbg] OpenDumpFile FAILED";
+                    cleanup();
+                    return;
+                }
+            }
+            else
+            {
+                qWarning() << "[WinDbg] Unknown target format:" << target;
+                cleanup();
+                return;
+            }
+        }
+
+        initInterfaces();
+
+        // WaitForEvent to finalize the attach/dump load.
+        // For remote connections the server session is already active — skip.
+        if (m_control && !m_isRemote) {
+            qDebug() << "[WinDbg] WaitForEvent...";
+            hr = m_control->WaitForEvent(0, 10000);
+            qDebug() << "[WinDbg] WaitForEvent hr=" << Qt::hex << (unsigned long)hr;
+        }
+
+        querySessionInfo();
+    });
+
+#else
+    Q_UNUSED(target);
+#endif
+}
+
+void WinDbgMemoryProvider::initInterfaces()
+{
+#ifdef _WIN32
+    if (!m_client) return;
+
+    HRESULT hr;
+    hr = m_client->QueryInterface(IID_IDebugDataSpaces, (void**)&m_dataSpaces);
+    qDebug() << "[WinDbg] IDebugDataSpaces hr=" << Qt::hex << (unsigned long)hr
+             << "ptr=" << (void*)m_dataSpaces;
+
+    hr = m_client->QueryInterface(IID_IDebugControl, (void**)&m_control);
+    qDebug() << "[WinDbg] IDebugControl hr=" << Qt::hex << (unsigned long)hr
+             << "ptr=" << (void*)m_control;
+
+    hr = m_client->QueryInterface(IID_IDebugSymbols, (void**)&m_symbols);
+    qDebug() << "[WinDbg] IDebugSymbols hr=" << Qt::hex << (unsigned long)hr
+             << "ptr=" << (void*)m_symbols;
+
+    if (!m_dataSpaces) {
+        qWarning() << "[WinDbg] No IDebugDataSpaces — cleaning up";
+        cleanup();
+    }
+#endif
+}
+
+void WinDbgMemoryProvider::querySessionInfo()
+{
+#ifdef _WIN32
+    if (!m_client) return;
+    HRESULT hr;
+
+    if (m_control) {
+        ULONG debugClass = 0, debugQualifier = 0;
+        hr = m_control->GetDebuggeeType(&debugClass, &debugQualifier);
+        qDebug() << "[WinDbg] GetDebuggeeType hr=" << Qt::hex << (unsigned long)hr
+                 << "class=" << debugClass << "qualifier=" << debugQualifier;
+        if (SUCCEEDED(hr)) {
+            m_isLive = (debugQualifier < DEBUG_DUMP_SMALL);
+            m_writable = m_isLive;
+        }
+    }
+
+    if (m_symbols) {
+        ULONG numModules = 0, numUnloaded = 0;
+        hr = m_symbols->GetNumberModules(&numModules, &numUnloaded);
+        qDebug() << "[WinDbg] GetNumberModules hr=" << Qt::hex << (unsigned long)hr
+                 << "loaded=" << numModules << "unloaded=" << numUnloaded;
+        if (SUCCEEDED(hr) && numModules > 0) {
+            char modName[256] = {};
+            ULONG modSize = 0;
+            hr = m_symbols->GetModuleNames(0, 0, nullptr, 0, nullptr,
+                                            modName, sizeof(modName), &modSize,
+                                            nullptr, 0, nullptr);
+            if (SUCCEEDED(hr) && modSize > 0)
+                m_name = QString::fromUtf8(modName);
+        }
+    }
+
+    if (m_name.isEmpty())
+        m_name = m_isLive ? QStringLiteral("DbgEng (Live)") : QStringLiteral("DbgEng (Dump)");
+
+    if (m_symbols) {
+        ULONG numModules = 0, numUnloaded = 0;
+        hr = m_symbols->GetNumberModules(&numModules, &numUnloaded);
+        if (SUCCEEDED(hr) && numModules > 0) {
+            ULONG64 moduleBase = 0;
+            hr = m_symbols->GetModuleByIndex(0, &moduleBase);
+            qDebug() << "[WinDbg] Module 0 base=" << Qt::hex << moduleBase;
+            if (SUCCEEDED(hr))
+                m_base = moduleBase;
+        }
+    }
+
+    if (m_base && m_dataSpaces) {
+        uint8_t probe[2] = {};
+        ULONG got = 0;
+        hr = m_dataSpaces->ReadVirtual(m_base, probe, 2, &got);
+        qDebug() << "[WinDbg] Probe read at" << Qt::hex << m_base
+                 << "hr=" << (unsigned long)hr << "got=" << got
+                 << "bytes:" << (int)probe[0] << (int)probe[1];
+        if (FAILED(hr) || got == 0) {
+            qWarning() << "[WinDbg] Probe read FAILED — cleaning up";
+            cleanup();
+            return;
+        }
+    }
+
+    qDebug() << "[WinDbg] Ready. name=" << m_name
+             << "base=" << Qt::hex << m_base << "isLive=" << m_isLive;
+#endif
+}
+
+WinDbgMemoryProvider::~WinDbgMemoryProvider()
+{
+#ifdef _WIN32
+    // Dispatch COM cleanup to the DbgEng thread (thread-affine release)
+    if (m_dbgThread && m_dbgThread->isRunning() && m_dispatcher) {
+        dispatchToOwner([this]() {
+            if (m_client) {
+                if (m_isRemote)
+                    m_client->EndSession(DEBUG_END_DISCONNECT);
+                else
+                    m_client->DetachProcesses();
+            }
+            cleanup();
+        });
+    } else {
+        // Thread not running — clean up directly (best-effort)
+        if (m_client) {
+            if (m_isRemote)
+                m_client->EndSession(DEBUG_END_DISCONNECT);
+            else
+                m_client->DetachProcesses();
+        }
+        cleanup();
+    }
+#else
+    cleanup();
+#endif
+
+    // Stop the dedicated thread
+    if (m_dbgThread) {
+        m_dbgThread->quit();
+        m_dbgThread->wait(3000);
+        delete m_dbgThread;
+        m_dbgThread = nullptr;
+    }
+    delete m_dispatcher;
+    m_dispatcher = nullptr;
+}
+
+void WinDbgMemoryProvider::cleanup()
+{
+#ifdef _WIN32
+    if (m_symbols)    { m_symbols->Release();    m_symbols = nullptr; }
+    if (m_control)    { m_control->Release();    m_control = nullptr; }
+    if (m_dataSpaces) { m_dataSpaces->Release(); m_dataSpaces = nullptr; }
+    if (m_client)     { m_client->Release();     m_client = nullptr; }
+#endif
+}
+
+bool WinDbgMemoryProvider::read(uint64_t addr, void* buf, int len) const
+{
+#ifdef _WIN32
+    if (!m_dataSpaces || len <= 0) return false;
+
+    bool result = false;
+    dispatchToOwner([&]() {
+        ULONG bytesRead = 0;
+        HRESULT hr = m_dataSpaces->ReadVirtual(m_base + addr, buf, (ULONG)len, &bytesRead);
+        if (FAILED(hr) || (int)bytesRead < len)
+            memset((char*)buf + bytesRead, 0, len - bytesRead);
+        result = bytesRead > 0;
+    });
+    return result;
+#else
+    Q_UNUSED(addr); Q_UNUSED(buf); Q_UNUSED(len);
+    return false;
+#endif
+}
+
+bool WinDbgMemoryProvider::write(uint64_t addr, const void* buf, int len)
+{
+#ifdef _WIN32
+    if (!m_dataSpaces || !m_writable || len <= 0) return false;
+
+    bool result = false;
+    dispatchToOwner([&]() {
+        ULONG bytesWritten = 0;
+        HRESULT hr = m_dataSpaces->WriteVirtual(m_base + addr, const_cast<void*>(buf),
+                                                 (ULONG)len, &bytesWritten);
+        result = SUCCEEDED(hr) && bytesWritten == (ULONG)len;
+    });
+    return result;
+#else
+    Q_UNUSED(addr); Q_UNUSED(buf); Q_UNUSED(len);
+    return false;
+#endif
+}
+
+int WinDbgMemoryProvider::size() const
+{
+#ifdef _WIN32
+    return m_dataSpaces ? 0x10000 : 0;
+#else
+    return 0;
+#endif
+}
+
+bool WinDbgMemoryProvider::isReadable(uint64_t /*addr*/, int len) const
+{
+#ifdef _WIN32
+    // DbgEng's ReadVirtual can read any mapped virtual address.
+    return m_dataSpaces != nullptr && len >= 0;
+#else
+    return false;
+#endif
+}
+
+QString WinDbgMemoryProvider::getSymbol(uint64_t addr) const
+{
+#ifdef _WIN32
+    if (!m_symbols) return {};
+
+    QString result;
+    dispatchToOwner([&]() {
+        char nameBuf[512] = {};
+        ULONG nameSize = 0;
+        ULONG64 displacement = 0;
+        HRESULT hr = m_symbols->GetNameByOffset(m_base + addr, nameBuf, sizeof(nameBuf),
+                                                 &nameSize, &displacement);
+        if (SUCCEEDED(hr) && nameSize > 0) {
+            result = QString::fromUtf8(nameBuf);
+            if (displacement > 0)
+                result += QStringLiteral("+0x%1").arg(displacement, 0, 16);
+        }
+    });
+    return result;
+#else
+    Q_UNUSED(addr);
+    return {};
+#endif
+}
+
+// ──────────────────────────────────────────────────────────────────────────
+// WinDbgMemoryPlugin implementation
+// ──────────────────────────────────────────────────────────────────────────
+
+QIcon WinDbgMemoryPlugin::Icon() const
+{
+    return qApp->style()->standardIcon(QStyle::SP_DriveNetIcon);
+}
+
+bool WinDbgMemoryPlugin::canHandle(const QString& target) const
+{
+    return target.startsWith("tcp:", Qt::CaseInsensitive)
+        || target.startsWith("npipe:", Qt::CaseInsensitive)
+        || target.startsWith("pid:", Qt::CaseInsensitive)
+        || target.startsWith("dump:", Qt::CaseInsensitive);
+}
+
+std::unique_ptr<rcx::Provider> WinDbgMemoryPlugin::createProvider(const QString& target, QString* errorMsg)
+{
+    auto provider = std::make_unique<WinDbgMemoryProvider>(target);
+    if (!provider->isValid())
+    {
+        if (errorMsg) {
+            if (target.startsWith("tcp:", Qt::CaseInsensitive)
+                || target.startsWith("npipe:", Qt::CaseInsensitive))
+                *errorMsg = QString("Failed to connect to debug server.\n\n"
+                                   "Target: %1\n\n"
+                                   "Make sure WinDbg is running with a matching .server command\n"
+                                   "(e.g. .server tcp:port=5055) and the port/pipe is reachable.")
+                            .arg(target);
+            else if (target.startsWith("pid:", Qt::CaseInsensitive))
+                *errorMsg = QString("Failed to attach to process.\n\n"
+                                   "Target: %1\n\n"
+                                   "Make sure the process is running and you have "
+                                   "sufficient privileges (try Run as Administrator).")
+                            .arg(target);
+            else
+                *errorMsg = QString("Failed to open dump file.\n\n"
+                                   "Target: %1\n\n"
+                                   "Make sure the file exists and is a valid dump.")
+                            .arg(target);
+        }
+        return nullptr;
+    }
+    return provider;
+}
+
+uint64_t WinDbgMemoryPlugin::getInitialBaseAddress(const QString& target) const
+{
+    Q_UNUSED(target);
+    return 0;
+}
+
+bool WinDbgMemoryPlugin::selectTarget(QWidget* parent, QString* target)
+{
+    QDialog dlg(parent);
+    dlg.setWindowTitle("WinDbg Settings");
+    dlg.resize(460, 260);
+
+    QPalette dlgPal = qApp->palette();
+    dlg.setPalette(dlgPal);
+    dlg.setAutoFillBackground(true);
+
+    auto* layout = new QVBoxLayout(&dlg);
+
+    layout->addWidget(new QLabel(
+        "Connect to a running WinDbg debug server.\n"
+        "In WinDbg, run:  .server tcp:port=5055"));
+
+    layout->addSpacing(8);
+    layout->addWidget(new QLabel("Connection string:"));
+    auto* connEdit = new QLineEdit;
+    connEdit->setPlaceholderText("tcp:Port=5055,Server=localhost");
+    connEdit->setText("tcp:Port=5055,Server=localhost");
+    layout->addWidget(connEdit);
+
+    layout->addSpacing(4);
+    layout->addWidget(new QLabel("Run one of these in WinDbg first:"));
+
+    auto addExample = [&](const QString& text) {
+        auto* row = new QHBoxLayout;
+        auto* label = new QLabel(text);
+        QPalette lp = dlgPal;
+        lp.setColor(QPalette::WindowText, dlgPal.color(QPalette::Disabled, QPalette::WindowText));
+        label->setPalette(lp);
+        label->setTextInteractionFlags(Qt::TextSelectableByMouse);
+        row->addWidget(label, 1);
+        auto* copyBtn = new QPushButton("Copy");
+        copyBtn->setFixedWidth(50);
+        copyBtn->setToolTip("Copy to clipboard");
+        QObject::connect(copyBtn, &QPushButton::clicked, [text]() {
+            QGuiApplication::clipboard()->setText(text);
+        });
+        row->addWidget(copyBtn);
+        layout->addLayout(row);
+    };
+
+    addExample(".server tcp:port=5055");
+    addExample(".server npipe:pipe=reclass");
+    layout->addStretch();
+
+    auto* btnLayout = new QHBoxLayout;
+    btnLayout->addStretch();
+    auto* okBtn = new QPushButton("OK");
+    auto* cancelBtn = new QPushButton("Cancel");
+    btnLayout->addWidget(okBtn);
+    btnLayout->addWidget(cancelBtn);
+    layout->addLayout(btnLayout);
+
+    QObject::connect(okBtn, &QPushButton::clicked, &dlg, &QDialog::accept);
+    QObject::connect(cancelBtn, &QPushButton::clicked, &dlg, &QDialog::reject);
+
+    if (dlg.exec() != QDialog::Accepted)
+        return false;
+
+    QString conn = connEdit->text().trimmed();
+    if (conn.isEmpty()) return false;
+    *target = conn;
+    return true;
+}
+
+// ──────────────────────────────────────────────────────────────────────────
+// Plugin factory
+// ──────────────────────────────────────────────────────────────────────────
+
+extern "C" RCX_PLUGIN_EXPORT IPlugin* CreatePlugin()
+{
+    return new WinDbgMemoryPlugin();
+}

plugins/WinDbgMemory/WinDbgMemoryPlugin.h

@@ -0,0 +1,122 @@
+#pragma once
+#include "../../src/iplugin.h"
+#include "../../src/core.h"
+
+#include <cstdint>
+#include <QObject>
+#include <QThread>
+
+// Forward declarations for DbgEng COM interfaces
+struct IDebugClient;
+struct IDebugDataSpaces;
+struct IDebugControl;
+struct IDebugSymbols;
+
+/**
+ * WinDbg memory provider
+ *
+ * Uses DbgEng to read memory from:
+ *   - An existing WinDbg debug server via DebugConnect (tcp/npipe)
+ *   - A live process by PID via DebugCreate (non-invasive attach)
+ *   - A crash dump (.dmp) file via DebugCreate
+ *
+ * Target string format:
+ *   "tcp:Port=5055,Server=localhost"   - connect to WinDbg debug server (TCP)
+ *   "npipe:Pipe=name,Server=localhost" - connect to WinDbg debug server (named pipe)
+ *   "pid:1234"                         - attach to process 1234
+ *   "dump:C:/path/to/file.dmp"        - open dump file
+ *
+ * Threading: All DbgEng COM calls are dispatched to the thread that created
+ * the connection (DebugConnect/DebugCreate).  This is required because the
+ * remote transport (TCP/named-pipe) binds to the creating thread.  The
+ * controller's background refresh threads call read() which transparently
+ * marshals to the owning thread via BlockingQueuedConnection.
+ */
+
+// Helper QObject that lives on the DbgEng-owning thread.
+// Used as a target for QMetaObject::invokeMethod to marshal calls.
+class DbgEngDispatcher : public QObject {
+    Q_OBJECT
+public:
+    using QObject::QObject;
+};
+
+class WinDbgMemoryProvider : public rcx::Provider
+{
+public:
+    /// Create a provider from a target string
+    WinDbgMemoryProvider(const QString& target);
+    ~WinDbgMemoryProvider() override;
+
+    // Required overrides
+    bool read(uint64_t addr, void* buf, int len) const override;
+    int size() const override;
+
+    // Optional overrides
+    bool isReadable(uint64_t addr, int len) const override;
+    bool write(uint64_t addr, const void* buf, int len) override;
+    bool isWritable() const override { return m_writable; }
+    QString name() const override { return m_name; }
+    QString kind() const override { return QStringLiteral("WinDbg"); }
+    QString getSymbol(uint64_t addr) const override;
+
+    bool isLive() const override { return m_isLive; }
+    uint64_t base() const override { return m_base; }
+    void setBase(uint64_t b) override { m_base = b; }
+
+private:
+    void initInterfaces();   // get IDebugDataSpaces/Control/Symbols from client
+    void querySessionInfo(); // determine live/dump, writable, name, base
+    void cleanup();
+
+    // Marshal a lambda to the DbgEng-owning thread.  If already on that
+    // thread, calls directly.  Otherwise blocks via QueuedConnection.
+    template<typename Fn>
+    void dispatchToOwner(Fn&& fn) const;
+
+    IDebugClient*     m_client = nullptr;
+    IDebugDataSpaces* m_dataSpaces = nullptr;
+    IDebugControl*    m_control = nullptr;
+    IDebugSymbols*    m_symbols = nullptr;
+
+    QString  m_name;
+    uint64_t m_base = 0;
+    bool     m_isLive = false;
+    bool     m_writable = false;
+    bool     m_isRemote = false;   // true when connected via DebugConnect (tcp/npipe)
+
+    // Dedicated thread for DbgEng COM operations.  The remote TCP/pipe
+    // transport is thread-affine — all calls must happen on the thread
+    // that called DebugConnect.  A private thread with its own event loop
+    // ensures dispatchToOwner() works from any calling thread (including
+    // QtConcurrent workers and the main/GUI thread) without deadlock.
+    QThread*          m_dbgThread  = nullptr;
+    DbgEngDispatcher* m_dispatcher = nullptr;
+};
+
+/**
+ * Plugin that provides WinDbgMemoryProvider
+ *
+ * Uses DbgEng to read memory via:
+ *   - Remote connection to an existing WinDbg debug server (tcp/npipe)
+ *   - Local non-invasive attach to a live process (pid)
+ *   - Local crash dump file (dump)
+ */
+class WinDbgMemoryPlugin : public IProviderPlugin
+{
+public:
+    std::string Name() const override { return "WinDbg Memory"; }
+    std::string Version() const override { return "2.0.0"; }
+    std::string Author() const override { return "Reclass"; }
+    std::string Description() const override { return "Read memory via DbgEng (live process attach or crash dump)"; }
+    k_ELoadType LoadType() const override { return k_ELoadTypeAuto; }
+    QIcon Icon() const override;
+
+    bool canHandle(const QString& target) const override;
+    std::unique_ptr<rcx::Provider> createProvider(const QString& target, QString* errorMsg) override;
+    uint64_t getInitialBaseAddress(const QString& target) const override;
+    bool selectTarget(QWidget* parent, QString* target) override;
+};
+
+// Plugin export
+extern "C" RCX_PLUGIN_EXPORT IPlugin* CreatePlugin();

src/compose.cpp

@@ -14,8 +14,9 @@ constexpr uint64_t kGoldenRatio      = 0x9E3779B97F4A7C15ULL;
 struct ComposeState {
     QString            text;
     QVector<LineMeta>  meta;
-    QSet<uint64_t>     visiting;   // cycle detection for struct recursion
-    QSet<qulonglong>   ptrVisiting; // cycle guard for pointer expansions
+    QSet<uint64_t>     visiting;      // cycle detection for struct recursion
+    QSet<qulonglong>   ptrVisiting;   // cycle guard for pointer expansions
+    QSet<uint64_t>     virtualPtrRefs; // refIds currently being virtually expanded via pointer deref
     int                currentLine = 0;
     int                typeW       = kColType;  // global type column width (fallback)
     int                nameW       = kColName;  // global name column width (fallback)
@@ -64,7 +65,6 @@ uint32_t computeMarkers(const Node& node, const Provider& /*prov*/,
                         uint64_t /*addr*/, bool isCont, int /*depth*/) {
     uint32_t mask = 0;
     if (isCont)                          mask |= (1u << M_CONT);
-    if (node.kind == NodeKind::Padding)  mask |= (1u << M_PAD);
     // No ambient validation markers — errors only shown during inline editing.
     return mask;
 }
@@ -118,14 +118,7 @@ void composeLeaf(ComposeState& state, const NodeTree& tree,
     int typeW = state.effectiveTypeW(scopeId);
     int nameW = state.effectiveNameW(scopeId);
 
-    // Line count: padding wraps at 8 bytes per line
-    int numLines;
-    if (node.kind == NodeKind::Padding) {
-        int totalBytes = qMax(1, node.arrayLen);
-        numLines = (totalBytes + 7) / 8;
-    } else {
-        numLines = linesForKind(node.kind);
-    }
+    int numLines = linesForKind(node.kind);
 
     // Resolve pointer target name for display
     QString ptrTypeOverride;
@@ -156,12 +149,7 @@ void composeLeaf(ComposeState& state, const NodeTree& tree,
 
         // Set byte count for hex preview lines (used for per-byte change highlighting)
         if (isHexPreview(node.kind)) {
-            if (node.kind == NodeKind::Padding) {
-                int totalSz = qMax(1, node.arrayLen);
-                lm.lineByteCount = qMin(8, totalSz - sub * 8);
-            } else {
-                lm.lineByteCount = sizeForKind(node.kind);
-            }
+            lm.lineByteCount = sizeForKind(node.kind);
         }
 
         QString lineText = fmt::fmtNodeLine(node, prov, absAddr, depth, sub,
@@ -345,12 +333,36 @@ void composeParent(ComposeState& state, const NodeTree& tree,
                 std::sort(refChildren.begin(), refChildren.end(), [&](int a, int b) {
                     return tree.nodes[a].offset < tree.nodes[b].offset;
                 });
+                // Use the referenced struct's scope widths (children come from there)
+                uint64_t refScopeId = node.refId;
                 for (int childIdx : refChildren) {
-                    // Skip self-referential children (e.g. struct Ball has a field of type Ball)
-                    if (state.visiting.contains(tree.nodes[childIdx].id))
+                    const Node& child = tree.nodes[childIdx];
+                    // Self-referential child → show as collapsed struct (non-expandable)
+                    if (state.visiting.contains(child.id)) {
+                        int typeW = state.effectiveTypeW(refScopeId);
+                        int nameW = state.effectiveNameW(refScopeId);
+                        LineMeta lm;
+                        lm.nodeIdx    = nodeIdx;  // parent struct — materialize target
+                        lm.nodeId     = child.id;
+                        lm.depth      = childDepth;
+                        lm.lineKind   = LineKind::Header;
+                        lm.offsetText = fmt::fmtOffsetMargin(
+                            tree.baseAddress + absAddr + child.offset, false,
+                            state.offsetHexDigits);
+                        lm.offsetAddr = tree.baseAddress + absAddr + child.offset;
+                        lm.nodeKind   = child.kind;
+                        lm.foldHead      = true;
+                        lm.foldCollapsed = true;
+                        lm.foldLevel  = computeFoldLevel(childDepth, true);
+                        lm.markerMask = (1u << M_STRUCT_BG) | (1u << M_CYCLE);
+                        lm.effectiveTypeW = typeW;
+                        lm.effectiveNameW = nameW;
+                        state.emitLine(fmt::fmtStructHeader(child, childDepth,
+                            /*collapsed=*/true, typeW, nameW), lm);
                         continue;
+                    }
                     composeNode(state, tree, prov, childIdx, childDepth,
-                                absAddr, node.refId, false, node.id);
+                                absAddr, node.refId, false, refScopeId);
                 }
             }
         }
@@ -406,37 +418,55 @@ void composeNode(ComposeState& state, const NodeTree& tree,
         QString ptrTargetName = resolvePointerTarget(tree, node.refId);
         QString ptrTypeOverride = fmt::pointerTypeName(node.kind, ptrTargetName);
 
+        // Check if this pointer has materialized children (from materializeRefChildren)
+        QVector<int> ptrChildren = state.childMap.value(node.id);
+        bool hasMaterialized = !ptrChildren.isEmpty();
+
+        // Force collapsed if this refId is already being virtually expanded
+        // (prevents infinite recursion in virtual expansion mode).
+        // Materialized children bypass this — they are real tree nodes with
+        // independent collapsed state, so recursion is bounded by the tree.
+        bool forceCollapsed = !hasMaterialized
+                              && state.virtualPtrRefs.contains(node.refId);
+        bool effectiveCollapsed = node.collapsed || forceCollapsed;
+
         // Emit merged fold header: "Type* Name {" (expanded) or "Type* Name -> val" (collapsed)
         {
             LineMeta lm;
             lm.nodeIdx    = nodeIdx;
             lm.nodeId     = node.id;
             lm.depth      = depth;
-            lm.lineKind   = node.collapsed ? LineKind::Field : LineKind::Header;
+            lm.lineKind   = effectiveCollapsed ? LineKind::Field : LineKind::Header;
             lm.offsetText = fmt::fmtOffsetMargin(tree.baseAddress + absAddr, false, state.offsetHexDigits);
             lm.offsetAddr = tree.baseAddress + absAddr;
             lm.nodeKind   = node.kind;
             lm.foldHead      = true;
-            lm.foldCollapsed = node.collapsed;
+            lm.foldCollapsed = effectiveCollapsed;
             lm.foldLevel  = computeFoldLevel(depth, true);
             lm.markerMask = computeMarkers(node, prov, absAddr, false, depth);
+            if (forceCollapsed) lm.markerMask |= (1u << M_CYCLE);
             lm.effectiveTypeW = typeW;
             lm.effectiveNameW = nameW;
             lm.pointerTargetName = ptrTargetName;
-            state.emitLine(fmt::fmtPointerHeader(node, depth, node.collapsed,
+            state.emitLine(fmt::fmtPointerHeader(node, depth, effectiveCollapsed,
                                                   prov, absAddr, ptrTypeOverride,
                                                   typeW, nameW), lm);
         }
 
-        if (!node.collapsed) {
+        if (!effectiveCollapsed) {
             int sz = node.byteSize();
             uint64_t ptrVal = 0;
             if (prov.isValid() && sz > 0 && prov.isReadable(absAddr, sz)) {
                 ptrVal = (node.kind == NodeKind::Pointer32)
                     ? (uint64_t)prov.readU32(absAddr) : prov.readU64(absAddr);
                 if (ptrVal != 0) {
-                    uint64_t pBase = ptrToProviderAddr(tree, ptrVal);
-                    if (pBase == UINT64_MAX) ptrVal = 0;  // ptr below base: invalid
+                    // Treat sentinel values as invalid pointers
+                    if (ptrVal == UINT64_MAX || (node.kind == NodeKind::Pointer32 && ptrVal == 0xFFFFFFFF))
+                        ptrVal = 0;
+                    else {
+                        uint64_t pBase = ptrToProviderAddr(tree, ptrVal);
+                        if (pBase == UINT64_MAX) ptrVal = 0;  // ptr below base: invalid
+                    }
                 }
             }
 
@@ -451,18 +481,42 @@ void composeNode(ComposeState& state, const NodeTree& tree,
             if (!ptrReadable)
                 pBase = (uint64_t)0 - tree.baseAddress;
 
-            qulonglong key = pBase ^ (node.refId * kGoldenRatio);
-            if (!state.ptrVisiting.contains(key)) {
-                state.ptrVisiting.insert(key);
-                int refIdx = tree.indexOfId(node.refId);
-                if (refIdx >= 0) {
-                    const Node& ref = tree.nodes[refIdx];
-                    if (ref.kind == NodeKind::Struct || ref.kind == NodeKind::Array)
-                        composeParent(state, tree, childProv, refIdx,
-                                      depth, pBase, ref.id,
-                                      /*isArrayChild=*/true);
+            if (hasMaterialized) {
+                // Render materialized children at the pointer target address.
+                // These are real tree nodes with independent state — use rootId
+                // so resolveAddr computes offsets relative to the pointer target.
+                std::sort(ptrChildren.begin(), ptrChildren.end(), [&](int a, int b) {
+                    return tree.nodes[a].offset < tree.nodes[b].offset;
+                });
+                for (int childIdx : ptrChildren) {
+                    composeNode(state, tree, childProv, childIdx, depth + 1,
+                                pBase, node.id, false, node.id);
+                }
+            } else {
+                // Virtual expansion via ref struct definition.
+                // Temporarily remove the ref struct from visiting so composeParent
+                // doesn't hit the struct-level cycle guard. The ptrVisiting mechanism
+                // handles actual address-level pointer cycles, and virtualPtrRefs
+                // prevents infinite virtual recursion (inner self-referential pointers
+                // are force-collapsed with M_CYCLE for the user to materialize).
+                qulonglong key = pBase ^ (node.refId * kGoldenRatio);
+                if (!state.ptrVisiting.contains(key)) {
+                    state.ptrVisiting.insert(key);
+                    int refIdx = tree.indexOfId(node.refId);
+                    if (refIdx >= 0) {
+                        const Node& ref = tree.nodes[refIdx];
+                        if (ref.kind == NodeKind::Struct || ref.kind == NodeKind::Array) {
+                            bool wasVisiting = state.visiting.remove(node.refId);
+                            state.virtualPtrRefs.insert(node.refId);
+                            composeParent(state, tree, childProv, refIdx,
+                                          depth, pBase, ref.id,
+                                          /*isArrayChild=*/true);
+                            state.virtualPtrRefs.remove(node.refId);
+                            if (wasVisiting) state.visiting.insert(node.refId);
+                        }
+                    }
+                    state.ptrVisiting.remove(key);
                 }
-                state.ptrVisiting.remove(key);
             }
 
             // Footer for pointer fold
@@ -542,7 +596,7 @@ ComposeResult compose(const NodeTree& tree, const Provider& prov, uint64_t viewR
     // Include struct/array names - they now use columnar layout too
     int maxNameLen = kMinNameW;
     for (const Node& node : tree.nodes) {
-        // Skip hex/padding (they show ASCII preview, not name column)
+        // Skip hex (they show ASCII preview, not name column)
         if (isHexPreview(node.kind)) continue;
         maxNameLen = qMax(maxNameLen, (int)node.name.size());
     }
@@ -561,7 +615,7 @@ ComposeResult compose(const NodeTree& tree, const Provider& prov, uint64_t viewR
             const Node& child = tree.nodes[childIdx];
             scopeMaxType = qMax(scopeMaxType, (int)nodeTypeName(child).size());
 
-            // Name width (skip hex/padding, but include containers)
+            // Name width (skip hex, but include containers)
             if (!isHexPreview(child.kind)) {
                 scopeMaxName = qMax(scopeMaxName, (int)child.name.size());
             }
@@ -593,7 +647,7 @@ ComposeResult compose(const NodeTree& tree, const Provider& prov, uint64_t viewR
             const Node& child = tree.nodes[childIdx];
             rootMaxType = qMax(rootMaxType, (int)nodeTypeName(child).size());
 
-            // Name width (skip hex/padding, include containers)
+            // Name width (skip hex, include containers)
             if (!isHexPreview(child.kind)) {
                 rootMaxName = qMax(rootMaxName, (int)child.name.size());
             }

src/controller.cpp

@@ -178,6 +178,14 @@ RcxEditor* RcxController::addSplitEditor(QWidget* parent) {
         editor->applyDocument(m_lastResult);
     }
     updateCommandRow();
+
+    // Eagerly pre-warm the type popup so first click isn't slow (~350ms cold start).
+    if (!m_cachedPopup) {
+        QTimer::singleShot(0, this, [this, editor]() {
+            if (!m_cachedPopup && !m_editors.isEmpty())
+                ensurePopup(editor);
+        });
+    }
     return editor;
 }
 
@@ -226,8 +234,9 @@ void RcxController::connectEditor(RcxEditor* editor) {
         switch (target) {
         case EditTarget::Name: {
             if (text.isEmpty()) break;
+            if (nodeIdx >= m_doc->tree.nodes.size()) break;
             const Node& node = m_doc->tree.nodes[nodeIdx];
-            // ASCII edit on Hex/Padding nodes
+            // ASCII edit on Hex nodes
             if (isHexPreview(node.kind)) {
                 setNodeValue(nodeIdx, subLine, text, /*isAscii=*/true);
             } else {
@@ -293,6 +302,9 @@ void RcxController::connectEditor(RcxEditor* editor) {
             break;
         case EditTarget::BaseAddress: {
             QString s = text.trimmed();
+            s.remove('`');          // WinDbg backtick separators (e.g. 7ff6`6cce0000)
+            s.remove('\n');
+            s.remove('\r');
             // Support simple equations: 0x10+0x4, 0x100-0x10, etc.
             uint64_t newBase = 0;
             bool ok = true;
@@ -347,7 +359,7 @@ void RcxController::connectEditor(RcxEditor* editor) {
             if (text.startsWith(QStringLiteral("#saved:"))) {
                 int idx = text.mid(7).toInt();
                 switchToSavedSource(idx);
-            } else if (text == QStringLiteral("file")) {
+            } else if (text == QStringLiteral("File")) {
                 auto* w = qobject_cast<QWidget*>(parent());
                 QString path = QFileDialog::getOpenFileName(w, "Load Binary Data", {}, "All Files (*)");
                 if (!path.isEmpty()) {
@@ -599,7 +611,7 @@ void RcxController::refresh() {
 
             if (isHexPreview(node.kind)) {
                 // Per-byte tracking for hex preview nodes
-                int lineOff = (node.kind == NodeKind::Padding) ? lm.subLine * 8 : 0;
+                int lineOff = 0;
                 int byteCount = lm.lineByteCount;
                 for (int b = 0; b < byteCount; b++) {
                     if (m_changedOffsets.contains(offset + lineOff + b)) {
@@ -792,6 +804,58 @@ void RcxController::toggleCollapse(int nodeIdx) {
         cmd::Collapse{node.id, node.collapsed, !node.collapsed}));
 }
 
+void RcxController::materializeRefChildren(int nodeIdx) {
+    if (nodeIdx < 0 || nodeIdx >= m_doc->tree.nodes.size()) return;
+    auto& tree = m_doc->tree;
+
+    // Snapshot values before any mutation invalidates references
+    const uint64_t parentId   = tree.nodes[nodeIdx].id;
+    const uint64_t refId      = tree.nodes[nodeIdx].refId;
+    const NodeKind parentKind = tree.nodes[nodeIdx].kind;
+    const QString  parentName = tree.nodes[nodeIdx].name;
+
+    if (refId == 0) return;
+    if (!tree.childrenOf(parentId).isEmpty()) return;  // already materialized
+
+    // Collect children to clone (copy by value to avoid reference invalidation)
+    QVector<int> refChildren = tree.childrenOf(refId);
+    if (refChildren.isEmpty()) return;
+
+    QVector<Node> clones;
+    clones.reserve(refChildren.size());
+    for (int ci : refChildren) {
+        Node copy = tree.nodes[ci];  // copy by value before any mutation
+        copy.id = tree.reserveId();
+        copy.parentId = parentId;
+        copy.collapsed = true;
+        clones.append(copy);
+    }
+
+    // Wrap all mutations in an undo macro
+    bool wasSuppressed = m_suppressRefresh;
+    m_suppressRefresh = true;
+    m_doc->undoStack.beginMacro(QStringLiteral("Materialize ref children"));
+
+    for (const Node& clone : clones) {
+        m_doc->undoStack.push(new RcxCommand(this,
+            cmd::Insert{clone, {}}));
+    }
+
+    // Auto-expand the self-referential child (the one that was the cycle)
+    // so the user gets expand in a single click
+    for (const Node& clone : clones) {
+        if (clone.kind == parentKind && clone.name == parentName && clone.refId == refId) {
+            m_doc->undoStack.push(new RcxCommand(this,
+                cmd::Collapse{clone.id, true, false}));
+            break;
+        }
+    }
+
+    m_doc->undoStack.endMacro();
+    m_suppressRefresh = wasSuppressed;
+    if (!m_suppressRefresh) refresh();
+}
+
 void RcxController::applyCommand(const Command& command, bool isUndo) {
     auto& tree = m_doc->tree;
 
@@ -872,7 +936,7 @@ void RcxController::applyCommand(const Command& command, bool isUndo) {
                 qWarning() << "WriteBytes failed at address" << QString::number(c.addr, 16);
             // Patch snapshot so compose sees the new value immediately
             if (m_snapshotProv)
-                m_snapshotProv->patchSnapshot(c.addr, bytes.constData(), bytes.size());
+                m_snapshotProv->patchPages(c.addr, bytes.constData(), bytes.size());
         } else if constexpr (std::is_same_v<T, cmd::ChangeArrayMeta>) {
             int idx = tree.indexOfId(c.nodeId);
             if (idx >= 0) {
@@ -1052,23 +1116,23 @@ void RcxController::showContextMenu(RcxEditor* editor, int line, int nodeIdx,
         // Quick-convert suggestions for Hex nodes
         bool addedQuickConvert = false;
         if (node.kind == NodeKind::Hex64) {
-            menu.addAction(icon("symbol-numeric.svg"), "Change to uint64_t", [this, nodeId]() {
+            menu.addAction("Change to uint64_t", [this, nodeId]() {
                 int ni = m_doc->tree.indexOfId(nodeId);
                 if (ni >= 0) changeNodeKind(ni, NodeKind::UInt64);
             });
-            menu.addAction(icon("symbol-numeric.svg"), "Change to uint32_t", [this, nodeId]() {
+            menu.addAction("Change to uint32_t", [this, nodeId]() {
                 int ni = m_doc->tree.indexOfId(nodeId);
                 if (ni >= 0) changeNodeKind(ni, NodeKind::UInt32);
             });
             addedQuickConvert = true;
         } else if (node.kind == NodeKind::Hex32) {
-            menu.addAction(icon("symbol-numeric.svg"), "Change to uint32_t", [this, nodeId]() {
+            menu.addAction("Change to uint32_t", [this, nodeId]() {
                 int ni = m_doc->tree.indexOfId(nodeId);
                 if (ni >= 0) changeNodeKind(ni, NodeKind::UInt32);
             });
             addedQuickConvert = true;
         } else if (node.kind == NodeKind::Hex16) {
-            menu.addAction(icon("symbol-numeric.svg"), "Change to int16_t", [this, nodeId]() {
+            menu.addAction("Change to int16_t", [this, nodeId]() {
                 int ni = m_doc->tree.indexOfId(nodeId);
                 if (ni >= 0) changeNodeKind(ni, NodeKind::Int16);
             });
@@ -1078,7 +1142,6 @@ void RcxController::showContextMenu(RcxEditor* editor, int line, int nodeIdx,
             menu.addSeparator();
 
         bool isEditable = node.kind != NodeKind::Struct && node.kind != NodeKind::Array
-                          && node.kind != NodeKind::Padding
                           && m_doc->provider->isWritable();
         if (isEditable) {
             menu.addAction(icon("edit.svg"), "Edit &Value\tEnter", [editor, line]() {
@@ -1094,6 +1157,51 @@ void RcxController::showContextMenu(RcxEditor* editor, int line, int nodeIdx,
             editor->beginInlineEdit(EditTarget::Type, line);
         });
 
+        // Convert to Hex nodes (decompose non-hex types into Hex64/32/16/8)
+        if (!isHexNode(node.kind) && node.kind != NodeKind::Struct && node.kind != NodeKind::Array) {
+            menu.addAction("Convert to &Hex", [this, nodeId]() {
+                int ni = m_doc->tree.indexOfId(nodeId);
+                if (ni < 0) return;
+                const Node& n = m_doc->tree.nodes[ni];
+                int totalSize = n.byteSize();
+                if (totalSize <= 0) return;
+
+                uint64_t parentId = n.parentId;
+                int baseOffset = n.offset;
+
+                bool wasSuppressed = m_suppressRefresh;
+                m_suppressRefresh = true;
+                m_doc->undoStack.beginMacro(QStringLiteral("Convert to Hex"));
+
+                // Remove the original node
+                QVector<Node> subtree;
+                subtree.append(n);
+                m_doc->undoStack.push(new RcxCommand(this,
+                    cmd::Remove{nodeId, subtree, {}}));
+
+                // Insert hex nodes to fill the space (largest first)
+                int padOffset = baseOffset;
+                int gap = totalSize;
+                while (gap > 0) {
+                    NodeKind padKind;
+                    int padSize;
+                    if (gap >= 8)      { padKind = NodeKind::Hex64; padSize = 8; }
+                    else if (gap >= 4) { padKind = NodeKind::Hex32; padSize = 4; }
+                    else if (gap >= 2) { padKind = NodeKind::Hex16; padSize = 2; }
+                    else               { padKind = NodeKind::Hex8;  padSize = 1; }
+
+                    insertNode(parentId, padOffset, padKind,
+                               QString("pad_%1").arg(padOffset, 2, 16, QChar('0')));
+                    padOffset += padSize;
+                    gap -= padSize;
+                }
+
+                m_doc->undoStack.endMacro();
+                m_suppressRefresh = wasSuppressed;
+                if (!m_suppressRefresh) refresh();
+            });
+        }
+
         menu.addSeparator();
 
         if (node.kind == NodeKind::Struct || node.kind == NodeKind::Array) {
@@ -1355,17 +1463,17 @@ void RcxController::performRealignment(uint64_t structId, int targetAlign) {
         return tree.nodes[a].offset < tree.nodes[b].offset;
     });
 
-    // Separate into real nodes (non-Padding) and padding nodes
+    // Separate into real nodes (non-hex) and hex filler nodes
     struct NodeInfo { uint64_t id; int offset; int size; };
     QVector<NodeInfo> realNodes;
-    QVector<uint64_t> padIds;
+    QVector<uint64_t> hexIds;
 
     for (int ci : kids) {
         const Node& child = tree.nodes[ci];
         int sz = (child.kind == NodeKind::Struct || child.kind == NodeKind::Array)
             ? tree.structSpan(child.id) : child.byteSize();
-        if (child.kind == NodeKind::Padding)
-            padIds.append(child.id);
+        if (isHexNode(child.kind))
+            hexIds.append(child.id);
         else
             realNodes.append({child.id, child.offset, sz});
     }
@@ -1398,7 +1506,7 @@ void RcxController::performRealignment(uint64_t structId, int targetAlign) {
     }
 
     // Check if anything actually changes
-    if (offChanges.isEmpty() && padIds.isEmpty() && padsNeeded.isEmpty())
+    if (offChanges.isEmpty() && hexIds.isEmpty() && padsNeeded.isEmpty())
         return;
 
     // Apply as undoable macro
@@ -1406,14 +1514,14 @@ void RcxController::performRealignment(uint64_t structId, int targetAlign) {
     m_suppressRefresh = true;
     m_doc->undoStack.beginMacro(QStringLiteral("Realign to %1").arg(targetAlign));
 
-    // 1. Remove all existing Padding nodes (no offset adjustments — we recompute)
-    for (uint64_t pid : padIds) {
-        int idx = tree.indexOfId(pid);
+    // 1. Remove all existing hex filler nodes (no offset adjustments — we recompute)
+    for (uint64_t hid : hexIds) {
+        int idx = tree.indexOfId(hid);
         if (idx < 0) continue;
         QVector<Node> subtree;
         subtree.append(tree.nodes[idx]);
         m_doc->undoStack.push(new RcxCommand(this,
-            cmd::Remove{pid, subtree, {}}));
+            cmd::Remove{hid, subtree, {}}));
     }
 
     // 2. Reposition real nodes
@@ -1422,15 +1530,28 @@ void RcxController::performRealignment(uint64_t structId, int targetAlign) {
             cmd::ChangeOffset{oc.id, oc.oldOff, oc.newOff}));
     }
 
-    // 3. Insert new padding in gaps
+    // 3. Insert hex nodes to fill gaps (largest first for alignment)
     for (const auto& pi : padsNeeded) {
-        Node pad;
-        pad.kind = NodeKind::Padding;
-        pad.parentId = structId;
-        pad.offset = pi.offset;
-        pad.arrayLen = pi.size;
-        pad.id = tree.reserveId();
-        m_doc->undoStack.push(new RcxCommand(this, cmd::Insert{pad}));
+        int padOffset = pi.offset;
+        int gap = pi.size;
+        while (gap > 0) {
+            NodeKind padKind;
+            int padSize;
+            if (gap >= 8)      { padKind = NodeKind::Hex64; padSize = 8; }
+            else if (gap >= 4) { padKind = NodeKind::Hex32; padSize = 4; }
+            else if (gap >= 2) { padKind = NodeKind::Hex16; padSize = 2; }
+            else               { padKind = NodeKind::Hex8;  padSize = 1; }
+
+            Node pad;
+            pad.kind = padKind;
+            pad.parentId = structId;
+            pad.offset = padOffset;
+            pad.name = QString("pad_%1").arg(padOffset, 2, 16, QChar('0'));
+            pad.id = tree.reserveId();
+            m_doc->undoStack.push(new RcxCommand(this, cmd::Insert{pad}));
+            padOffset += padSize;
+            gap -= padSize;
+        }
     }
 
     m_doc->undoStack.endMacro();
@@ -1534,7 +1655,6 @@ void RcxController::showTypePopup(RcxEditor* editor, TypePopupMode mode,
 
     auto addPrimitives = [&](bool enabled, bool excludeStructArrayPad) {
         for (const auto& m : kKindMeta) {
-            if (m.kind == NodeKind::Padding) continue;
             if (excludeStructArrayPad &&
                 (m.kind == NodeKind::Struct || m.kind == NodeKind::Array))
                 continue;
@@ -1669,6 +1789,10 @@ void RcxController::showTypePopup(RcxEditor* editor, TypePopupMode mode,
     });
     connect(popup, &TypeSelectorPopup::createNewTypeRequested,
             this, [this, mode, nodeIdx]() {
+        bool wasSuppressed = m_suppressRefresh;
+        m_suppressRefresh = true;
+        m_doc->undoStack.beginMacro(QStringLiteral("Create new type"));
+
         Node n;
         n.kind = NodeKind::Struct;
         n.name = QString();
@@ -1676,6 +1800,16 @@ void RcxController::showTypePopup(RcxEditor* editor, TypePopupMode mode,
         n.offset = 0;
         n.id = m_doc->tree.reserveId();
         m_doc->undoStack.push(new RcxCommand(this, cmd::Insert{n}));
+
+        // Populate with default hex nodes (8 x Hex64 = 64 bytes)
+        for (int i = 0; i < 8; i++) {
+            insertNode(n.id, i * 8, NodeKind::Hex64,
+                       QString("field_%1").arg(i * 8, 2, 16, QChar('0')));
+        }
+
+        m_doc->undoStack.endMacro();
+        m_suppressRefresh = wasSuppressed;
+
         TypeEntry newEntry;
         newEntry.entryKind = TypeEntry::Composite;
         newEntry.structId  = n.id;
@@ -1694,14 +1828,22 @@ void RcxController::applyTypePopupResult(TypePopupMode mode, int nodeIdx,
     }
 
     if (nodeIdx < 0 || nodeIdx >= m_doc->tree.nodes.size()) return;
-    const Node& node = m_doc->tree.nodes[nodeIdx];
+
+    // BUG-1 fix: Copy needed fields to locals before any mutation.
+    // changeNodeKind() can trigger insertNode() → addNode() → nodes.append(),
+    // which may reallocate the QVector, invalidating any reference into it.
+    const uint64_t nodeId   = m_doc->tree.nodes[nodeIdx].id;
+    const NodeKind nodeKind = m_doc->tree.nodes[nodeIdx].kind;
+    const NodeKind elemKind = m_doc->tree.nodes[nodeIdx].elementKind;
+    const uint64_t nodeRefId = m_doc->tree.nodes[nodeIdx].refId;
+    const int      arrLen   = m_doc->tree.nodes[nodeIdx].arrayLen;
 
     // Parse the full text for modifiers (e.g. "int32_t[10]", "Ball*")
     TypeSpec spec = parseTypeSpec(fullText);
 
     if (mode == TypePopupMode::FieldType) {
         if (entry.entryKind == TypeEntry::Primitive) {
-            if (entry.primitiveKind != node.kind)
+            if (entry.primitiveKind != nodeKind)
                 changeNodeKind(nodeIdx, entry.primitiveKind);
         } else if (entry.entryKind == TypeEntry::Composite) {
             bool wasSuppressed = m_suppressRefresh;
@@ -1710,34 +1852,34 @@ void RcxController::applyTypePopupResult(TypePopupMode mode, int nodeIdx,
 
             if (spec.isPointer) {
                 // Pointer modifier: e.g. "Material*" → Pointer64 + refId
-                if (node.kind != NodeKind::Pointer64)
+                if (nodeKind != NodeKind::Pointer64)
                     changeNodeKind(nodeIdx, NodeKind::Pointer64);
-                int idx = m_doc->tree.indexOfId(node.id);
+                int idx = m_doc->tree.indexOfId(nodeId);
                 if (idx >= 0 && m_doc->tree.nodes[idx].refId != entry.structId)
                     m_doc->undoStack.push(new RcxCommand(this,
-                        cmd::ChangePointerRef{node.id, m_doc->tree.nodes[idx].refId, entry.structId}));
+                        cmd::ChangePointerRef{nodeId, m_doc->tree.nodes[idx].refId, entry.structId}));
 
             } else if (spec.arrayCount > 0) {
                 // Array modifier: e.g. "Material[10]" → Array + Struct element
-                if (node.kind != NodeKind::Array)
+                if (nodeKind != NodeKind::Array)
                     changeNodeKind(nodeIdx, NodeKind::Array);
-                int idx = m_doc->tree.indexOfId(node.id);
+                int idx = m_doc->tree.indexOfId(nodeId);
                 if (idx >= 0) {
                     auto& n = m_doc->tree.nodes[idx];
                     if (n.elementKind != NodeKind::Struct || n.arrayLen != spec.arrayCount)
                         m_doc->undoStack.push(new RcxCommand(this,
-                            cmd::ChangeArrayMeta{node.id, n.elementKind, NodeKind::Struct,
+                            cmd::ChangeArrayMeta{nodeId, n.elementKind, NodeKind::Struct,
                                                  n.arrayLen, spec.arrayCount}));
                     if (n.refId != entry.structId)
                         m_doc->undoStack.push(new RcxCommand(this,
-                            cmd::ChangePointerRef{node.id, n.refId, entry.structId}));
+                            cmd::ChangePointerRef{nodeId, n.refId, entry.structId}));
                 }
 
             } else {
                 // Plain struct: e.g. "Material" → Struct + structTypeName + refId + collapsed
-                if (node.kind != NodeKind::Struct)
+                if (nodeKind != NodeKind::Struct)
                     changeNodeKind(nodeIdx, NodeKind::Struct);
-                int idx = m_doc->tree.indexOfId(node.id);
+                int idx = m_doc->tree.indexOfId(nodeId);
                 if (idx >= 0) {
                     int refIdx = m_doc->tree.indexOfId(entry.structId);
                     QString targetName;
@@ -1748,11 +1890,11 @@ void RcxController::applyTypePopupResult(TypePopupMode mode, int nodeIdx,
                     QString oldTypeName = m_doc->tree.nodes[idx].structTypeName;
                     if (oldTypeName != targetName)
                         m_doc->undoStack.push(new RcxCommand(this,
-                            cmd::ChangeStructTypeName{node.id, oldTypeName, targetName}));
+                            cmd::ChangeStructTypeName{nodeId, oldTypeName, targetName}));
                     // Set refId so compose can expand the referenced struct's children
                     if (m_doc->tree.nodes[idx].refId != entry.structId)
                         m_doc->undoStack.push(new RcxCommand(this,
-                            cmd::ChangePointerRef{node.id, m_doc->tree.nodes[idx].refId, entry.structId}));
+                            cmd::ChangePointerRef{nodeId, m_doc->tree.nodes[idx].refId, entry.structId}));
                     // ChangePointerRef auto-sets collapsed=true when refId != 0
                 }
             }
@@ -1763,33 +1905,32 @@ void RcxController::applyTypePopupResult(TypePopupMode mode, int nodeIdx,
         }
     } else if (mode == TypePopupMode::ArrayElement) {
         if (entry.entryKind == TypeEntry::Primitive) {
-            if (entry.primitiveKind != node.elementKind) {
+            if (entry.primitiveKind != elemKind) {
                 m_doc->undoStack.push(new RcxCommand(this,
-                    cmd::ChangeArrayMeta{node.id,
-                        node.elementKind, entry.primitiveKind,
-                        node.arrayLen, node.arrayLen}));
+                    cmd::ChangeArrayMeta{nodeId,
+                        elemKind, entry.primitiveKind,
+                        arrLen, arrLen}));
             }
         } else if (entry.entryKind == TypeEntry::Composite) {
-            if (node.elementKind != NodeKind::Struct || node.refId != entry.structId) {
+            if (elemKind != NodeKind::Struct || nodeRefId != entry.structId) {
                 m_doc->undoStack.push(new RcxCommand(this,
-                    cmd::ChangeArrayMeta{node.id,
-                        node.elementKind, NodeKind::Struct,
-                        node.arrayLen, node.arrayLen}));
-                if (node.refId != entry.structId) {
+                    cmd::ChangeArrayMeta{nodeId,
+                        elemKind, NodeKind::Struct,
+                        arrLen, arrLen}));
+                if (nodeRefId != entry.structId) {
                     m_doc->undoStack.push(new RcxCommand(this,
-                        cmd::ChangePointerRef{node.id, node.refId, entry.structId}));
+                        cmd::ChangePointerRef{nodeId, nodeRefId, entry.structId}));
                 }
             }
         }
     } else if (mode == TypePopupMode::PointerTarget) {
         // "void" entry → refId 0; composite entry → real structId
         uint64_t realRefId = (entry.entryKind == TypeEntry::Composite) ? entry.structId : 0;
-        if (realRefId != node.refId) {
+        if (realRefId != nodeRefId) {
             m_doc->undoStack.push(new RcxCommand(this,
-                cmd::ChangePointerRef{node.id, node.refId, realRefId}));
+                cmd::ChangePointerRef{nodeId, nodeRefId, realRefId}));
         }
     }
-    refresh();
 }
 
 void RcxController::attachViaPlugin(const QString& providerIdentifier, const QString& target) {
@@ -1858,15 +1999,66 @@ void RcxController::pushSavedSourcesToEditors() {
 
 void RcxController::setupAutoRefresh() {
     m_refreshTimer = new QTimer(this);
-    m_refreshTimer->setInterval(2000);
+    m_refreshTimer->setInterval(660);
     connect(m_refreshTimer, &QTimer::timeout, this, &RcxController::onRefreshTick);
     m_refreshTimer->start();
 
-    m_refreshWatcher = new QFutureWatcher<QByteArray>(this);
-    connect(m_refreshWatcher, &QFutureWatcher<QByteArray>::finished,
+    m_refreshWatcher = new QFutureWatcher<PageMap>(this);
+    connect(m_refreshWatcher, &QFutureWatcher<PageMap>::finished,
             this, &RcxController::onReadComplete);
 }
 
+// Recursively collect memory ranges for a struct and its pointer targets.
+// memBase is the provider-relative address where this struct's data lives.
+void RcxController::collectPointerRanges(
+        uint64_t structId, uint64_t memBase,
+        int depth, int maxDepth,
+        QSet<QPair<uint64_t,uint64_t>>& visited,
+        QVector<QPair<uint64_t,int>>& ranges) const
+{
+    if (depth >= maxDepth) return;
+    QPair<uint64_t,uint64_t> key{structId, memBase};
+    if (visited.contains(key)) return;
+    visited.insert(key);
+
+    int span = m_doc->tree.structSpan(structId);
+    if (span <= 0) return;
+    ranges.append({memBase, span});
+
+    if (!m_snapshotProv) return;
+
+    // Walk children looking for non-collapsed pointers
+    QVector<int> children = m_doc->tree.childrenOf(structId);
+    for (int ci : children) {
+        const Node& child = m_doc->tree.nodes[ci];
+        if (child.kind != NodeKind::Pointer32 && child.kind != NodeKind::Pointer64)
+            continue;
+        if (child.collapsed || child.refId == 0) continue;
+
+        uint64_t ptrAddr = memBase + child.offset;
+        int ptrSize = child.byteSize();
+        if (!m_snapshotProv->isReadable(ptrAddr, ptrSize)) continue;
+
+        uint64_t ptrVal = (child.kind == NodeKind::Pointer32)
+            ? (uint64_t)m_snapshotProv->readU32(ptrAddr)
+            : m_snapshotProv->readU64(ptrAddr);
+        if (ptrVal == 0 || ptrVal == UINT64_MAX || ptrVal < m_doc->tree.baseAddress) continue;
+
+        uint64_t pBase = ptrVal - m_doc->tree.baseAddress;
+        collectPointerRanges(child.refId, pBase, depth + 1, maxDepth,
+                             visited, ranges);
+    }
+
+    // Embedded struct references (struct node with refId but no own children)
+    int idx = m_doc->tree.indexOfId(structId);
+    if (idx >= 0) {
+        const Node& sn = m_doc->tree.nodes[idx];
+        if (sn.kind == NodeKind::Struct && sn.refId != 0 && children.isEmpty())
+            collectPointerRanges(sn.refId, memBase, depth, maxDepth,
+                                 visited, ranges);
+    }
+}
+
 void RcxController::onRefreshTick() {
     if (m_readInFlight) return;
     if (!m_doc->provider || !m_doc->provider->isLive()) return;
@@ -1877,75 +2069,120 @@ void RcxController::onRefreshTick() {
     int extent = computeDataExtent();
     if (extent <= 0) return;
 
+    // Collect all needed ranges: main struct + pointer targets
+    QVector<QPair<uint64_t,int>> ranges;
+    ranges.append({0, extent});
+
+    if (m_snapshotProv) {
+        QSet<QPair<uint64_t,uint64_t>> visited;
+        uint64_t rootId = m_viewRootId;
+        if (rootId == 0 && !m_doc->tree.nodes.isEmpty())
+            rootId = m_doc->tree.nodes[0].id;
+        collectPointerRanges(rootId, 0, 0, 99, visited, ranges);
+    }
+
     m_readInFlight = true;
     m_readGen = m_refreshGen;
 
-    // Capture shared_ptr copy — keeps provider alive during async read
     auto prov = m_doc->provider;
-    uint64_t base = prov->base();
-    qDebug() << "[Refresh] reading" << extent << "bytes from base" << Qt::hex << base;
-    m_refreshWatcher->setFuture(QtConcurrent::run([prov, extent]() -> QByteArray {
-        return prov->readBytes(0, extent);
+    qDebug() << "[Refresh] reading" << ranges.size() << "ranges from base"
+             << Qt::hex << prov->base();
+    m_refreshWatcher->setFuture(QtConcurrent::run([prov, ranges]() -> PageMap {
+        constexpr uint64_t kPageSize = 4096;
+        constexpr uint64_t kPageMask = ~(kPageSize - 1);
+        PageMap pages;
+        for (const auto& r : ranges) {
+            uint64_t pageStart = r.first & kPageMask;
+            uint64_t end = r.first + r.second;
+            uint64_t pageEnd = (end + kPageSize - 1) & kPageMask;
+            for (uint64_t p = pageStart; p < pageEnd; p += kPageSize) {
+                if (!pages.contains(p))
+                    pages[p] = prov->readBytes(p, static_cast<int>(kPageSize));
+            }
+        }
+        return pages;
     }));
 }
 
 void RcxController::onReadComplete() {
     m_readInFlight = false;
 
-    // Stale read (provider changed while we were reading) — discard
     if (m_readGen != m_refreshGen) return;
 
-    QByteArray newData = m_refreshWatcher->result();
+    PageMap newPages;
+    try {
+        newPages = m_refreshWatcher->result();
+    } catch (const std::exception& e) {
+        qWarning() << "[Refresh] async read threw:" << e.what();
+        return;
+    } catch (...) {
+        qWarning() << "[Refresh] async read threw unknown exception";
+        return;
+    }
 
-    // Fast path: no changes at all — skip full recompose
-    if (!m_prevSnapshot.isEmpty() && m_prevSnapshot.size() == newData.size()
-        && memcmp(m_prevSnapshot.constData(), newData.constData(), newData.size()) == 0)
+    // All-zero guard: if page 0 is all zeros and we already have data, discard
+    if (!m_prevPages.isEmpty() && newPages.contains(0)) {
+        const QByteArray& p0 = newPages.value(0);
+        bool allZero = true;
+        for (int i = 0; i < p0.size(); ++i) {
+            if (p0[i] != 0) { allZero = false; break; }
+        }
+        if (allZero) {
+            qDebug() << "[Refresh] discarding all-zero page-0, keeping stale snapshot";
+            return;
+        }
+    }
+
+    // Fast path: no changes at all
+    if (newPages == m_prevPages)
         return;
 
-    // Compute which byte offsets changed
+    // Compute which byte offsets changed (for change highlighting).
+    // Skip on first snapshot — nothing to compare against.
     m_changedOffsets.clear();
-    if (!m_prevSnapshot.isEmpty()) {
-        int compareLen = qMin(m_prevSnapshot.size(), newData.size());
-        const char* oldP = m_prevSnapshot.constData();
-        const char* newP = newData.constData();
-        for (int i = 0; i < compareLen; i++) {
-            if (oldP[i] != newP[i])
-                m_changedOffsets.insert(i);
+    if (!m_prevPages.isEmpty()) {
+        for (auto it = newPages.constBegin(); it != newPages.constEnd(); ++it) {
+            uint64_t pageAddr = it.key();
+            const QByteArray& newPage = it.value();
+            auto oldIt = m_prevPages.constFind(pageAddr);
+            if (oldIt == m_prevPages.constEnd())
+                continue;   // new page, no previous data to diff against
+            const QByteArray& oldPage = oldIt.value();
+            int cmpLen = qMin(oldPage.size(), newPage.size());
+            for (int i = 0; i < cmpLen; ++i) {
+                if (oldPage[i] != newPage[i])
+                    m_changedOffsets.insert(static_cast<int64_t>(pageAddr) + i);
+            }
         }
-        // Bytes beyond old snapshot are all "new"
-        for (int i = compareLen; i < newData.size(); i++)
-            m_changedOffsets.insert(i);
     }
-    m_prevSnapshot = newData;
 
-    // Update or create snapshot provider
+    int mainExtent = computeDataExtent();
+    m_prevPages = newPages;
+
     if (m_snapshotProv)
-        m_snapshotProv->updateSnapshot(std::move(newData));
+        m_snapshotProv->updatePages(std::move(newPages), mainExtent);
     else
-        m_snapshotProv = std::make_unique<SnapshotProvider>(m_doc->provider, std::move(newData));
+        m_snapshotProv = std::make_unique<SnapshotProvider>(
+            m_doc->provider, std::move(newPages), mainExtent);
 
     refresh();
-
-    // Clear changed offsets after refresh consumed them
     m_changedOffsets.clear();
 }
 
 int RcxController::computeDataExtent() const {
-    // Prefer tree-based extent: exact bytes needed for rendering
+    static constexpr int64_t kMaxMainExtent = 16 * 1024 * 1024; // 16 MB cap
+
     int64_t treeExtent = 0;
     for (int i = 0; i < m_doc->tree.nodes.size(); i++) {
         const Node& node = m_doc->tree.nodes[i];
         int64_t off = m_doc->tree.computeOffset(i);
-        // byteSize() returns 0 for Array-of-Struct/Array; use structSpan() for containers
         int sz = (node.kind == NodeKind::Struct || node.kind == NodeKind::Array)
             ? m_doc->tree.structSpan(node.id) : node.byteSize();
         int64_t end = off + sz;
         if (end > treeExtent) treeExtent = end;
     }
-    // Clamp to max int (readBytes takes int length)
-    if (treeExtent > 0) return (int)qMin(treeExtent, (int64_t)std::numeric_limits<int>::max());
+    if (treeExtent > 0) return static_cast<int>(qMin(treeExtent, kMaxMainExtent));
 
-    // Fallback: provider size (empty tree)
     int provSize = m_doc->provider->size();
     if (provSize > 0) return provSize;
     return 0;
@@ -1955,7 +2192,7 @@ void RcxController::resetSnapshot() {
     m_refreshGen++;
     m_readInFlight = false;
     m_snapshotProv.reset();
-    m_prevSnapshot.clear();
+    m_prevPages.clear();
     m_changedOffsets.clear();
 }
 
@@ -1965,7 +2202,10 @@ void RcxController::handleMarginClick(RcxEditor* editor, int margin,
     if (!lm) return;
 
     if (lm->foldHead && (margin == 0 || margin == 1)) {
-        toggleCollapse(lm->nodeIdx);
+        if (lm->markerMask & (1u << M_CYCLE))
+            materializeRefChildren(lm->nodeIdx);
+        else
+            toggleCollapse(lm->nodeIdx);
     } else if (margin == 0 || margin == 1) {
         emit nodeSelected(lm->nodeIdx);
     }

src/controller.h

@@ -7,6 +7,7 @@
 #include <QUndoCommand>
 #include <QTimer>
 #include <QFutureWatcher>
+#include <QPointer>
 #include <memory>
 
 namespace rcx {
@@ -89,6 +90,7 @@ public:
     void insertNode(uint64_t parentId, int offset, NodeKind kind, const QString& name);
     void removeNode(int nodeIdx);
     void toggleCollapse(int nodeIdx);
+    void materializeRefChildren(int nodeIdx);
     void setNodeValue(int nodeIdx, int subLine, const QString& text, bool isAscii = false);
     void duplicateNode(int nodeIdx);
     void showContextMenu(RcxEditor* editor, int line, int nodeIdx, int subLine, const QPoint& globalPos);
@@ -137,13 +139,14 @@ private:
     int m_activeSourceIdx = -1;
 
     // ── Cached type selector popup (avoids ~350ms cold-start on first show) ──
-    TypeSelectorPopup* m_cachedPopup = nullptr;
+    QPointer<TypeSelectorPopup> m_cachedPopup;
 
     // ── Auto-refresh state ──
+    using PageMap = QHash<uint64_t, QByteArray>;
     QTimer*         m_refreshTimer = nullptr;
-    QFutureWatcher<QByteArray>* m_refreshWatcher = nullptr;
+    QFutureWatcher<PageMap>* m_refreshWatcher = nullptr;
     std::unique_ptr<SnapshotProvider> m_snapshotProv;
-    QByteArray      m_prevSnapshot;
+    PageMap         m_prevPages;
     QSet<int64_t>   m_changedOffsets;
     uint64_t        m_refreshGen = 0;
     uint64_t        m_readGen = 0;
@@ -165,6 +168,10 @@ private:
     void onReadComplete();
     int  computeDataExtent() const;
     void resetSnapshot();
+    void collectPointerRanges(uint64_t structId, uint64_t memBase,
+                              int depth, int maxDepth,
+                              QSet<QPair<uint64_t,uint64_t>>& visited,
+                              QVector<QPair<uint64_t,int>>& ranges) const;
 };
 
 } // namespace rcx

src/core.h

@@ -27,7 +27,6 @@ enum class NodeKind : uint8_t {
     Pointer32, Pointer64,
     Vec2, Vec3, Vec4, Mat4x4,
     UTF8, UTF16,
-    Padding,
     Struct, Array
 };
 
@@ -37,11 +36,11 @@ inline uint qHash(rcx::NodeKind key, uint seed = 0) { return ::qHash(static_cast
 #endif
 namespace rcx { // reopen
 
-// ── Kind flags (replaces repeated Hex/Padding switches) ──
+// ── Kind flags (replaces repeated Hex switches) ──
 
 enum KindFlags : uint32_t {
     KF_None       = 0,
-    KF_HexPreview = 1 << 0,  // Hex8..Hex64 + Padding (ASCII+hex layout)
+    KF_HexPreview = 1 << 0,  // Hex8..Hex64 (ASCII+hex layout)
     KF_Container  = 1 << 1,  // Struct/Array
     KF_String     = 1 << 2,  // UTF8/UTF16
     KF_Vector     = 1 << 3,  // Vec2/3/4
@@ -84,7 +83,6 @@ inline constexpr KindMeta kKindMeta[] = {
     {NodeKind::Mat4x4,    "Mat4x4",    "mat4x4",     64,  4,  4, KF_None},
     {NodeKind::UTF8,      "UTF8",      "char[]",      1,  1,  1, KF_String},
     {NodeKind::UTF16,     "UTF16",     "wchar_t[]",   2,  1,  2, KF_String},
-    {NodeKind::Padding,   "Padding",   "pad",         1,  1,  1, KF_HexPreview},
     {NodeKind::Struct,    "Struct",    "struct",      0,  1,  1, KF_Container},
     {NodeKind::Array,     "Array",     "array",       0,  1,  1, KF_Container},
 };
@@ -155,7 +153,6 @@ inline QStringList allTypeNamesForUI(bool stripBrackets = false) {
 
 enum Marker : int {
     M_CONT      = 0,
-    M_PAD       = 1,
     M_PTR0      = 2,
     M_CYCLE     = 3,
     M_ERR       = 4,
@@ -187,9 +184,12 @@ struct Node {
     int byteSize() const {
         switch (kind) {
         case NodeKind::UTF8:    return strLen;
-        case NodeKind::UTF16:   return strLen * 2;
-        case NodeKind::Padding: return qMax(1, arrayLen);
-        case NodeKind::Array:   return arrayLen * sizeForKind(elementKind);
+        case NodeKind::UTF16:   return qMin(strLen, INT_MAX / 2) * 2;
+        case NodeKind::Array: {
+            int elemSz = sizeForKind(elementKind);
+            if (elemSz <= 0) return 0;
+            return qMin(arrayLen, INT_MAX / elemSz) * elemSz;
+        }
         default: return sizeForKind(kind);
         }
     }
@@ -221,8 +221,8 @@ struct Node {
         n.classKeyword = o["classKeyword"].toString();
         n.parentId  = o["parentId"].toString("0").toULongLong();
         n.offset    = o["offset"].toInt(0);
-        n.arrayLen  = o["arrayLen"].toInt(1);
-        n.strLen    = o["strLen"].toInt(64);
+        n.arrayLen  = qBound(1, o["arrayLen"].toInt(1), 1000000);
+        n.strLen    = qBound(1, o["strLen"].toInt(64), 1000000);
         n.collapsed = o["collapsed"].toBool(false);
         n.refId     = o["refId"].toString("0").toULongLong();
         n.elementKind = kindFromString(o["elementKind"].toString("UInt8"));
@@ -535,7 +535,7 @@ inline ColumnSpan nameSpanFor(const LineMeta& lm, int typeW = kColType, int name
     int ind = kFoldCol + lm.depth * 3;
     int start = ind + typeW + kSepWidth;
 
-    // Hex/Padding: ASCII preview occupies the name column (padded to nameW)
+    // Hex: ASCII preview occupies the name column (padded to nameW)
     if (isHexPreview(lm.nodeKind))
         return {start, start + nameW, true};
 
@@ -547,9 +547,9 @@ inline ColumnSpan valueSpanFor(const LineMeta& lm, int /*lineLength*/, int typeW
         lm.lineKind == LineKind::ArrayElementSeparator) return {};
     int ind = kFoldCol + lm.depth * 3;
 
-    // Hex/Padding uses nameW for ASCII column (same as regular name column)
-    bool isHexPad = isHexPreview(lm.nodeKind);
-    int valWidth = isHexPad ? 23 : kColValue;
+    // Hex uses nameW for ASCII column (same as regular name column)
+    bool isHex = isHexPreview(lm.nodeKind);
+    int valWidth = isHex ? 23 : kColValue;
 
     int prefixW = typeW + nameW + 2 * kSepWidth;
 
@@ -567,8 +567,8 @@ inline ColumnSpan commentSpanFor(const LineMeta& lm, int lineLength, int typeW =
     if (lm.lineKind == LineKind::Header || lm.lineKind == LineKind::Footer) return {};
     int ind = kFoldCol + lm.depth * 3;
 
-    bool isHexPad = isHexPreview(lm.nodeKind);
-    int valWidth = isHexPad ? 23 : kColValue;
+    bool isHex = isHexPreview(lm.nodeKind);
+    int valWidth = isHex ? 23 : kColValue;
 
     int prefixW = typeW + nameW + 2 * kSepWidth;
     int start;

src/editor.cpp

@@ -14,6 +14,7 @@
 #include <QCursor>
 #include <QMenu>
 #include <QApplication>
+#include <QClipboard>
 #include "themes/thememanager.h"
 
 namespace rcx {
@@ -140,7 +141,7 @@ void RcxEditor::setupScintilla() {
     m_sci->SendScintilla(QsciScintillaBase::SCI_INDICSETSTYLE,
                          IND_EDITABLE, 5 /*INDIC_HIDDEN*/);
 
-    // Hex/Padding node dim indicator — overrides text color
+    // Hex node dim indicator — overrides text color
     m_sci->SendScintilla(QsciScintillaBase::SCI_INDICSETSTYLE,
                          IND_HEX_DIM, 17 /*INDIC_TEXTFORE*/);
 
@@ -240,9 +241,6 @@ void RcxEditor::setupMarkers() {
     // M_CONT (0): continuation line (metadata only, no visual)
     m_sci->markerDefine(QsciScintilla::Invisible, M_CONT);
 
-    // M_PAD (1): padding line (metadata only, no visual)
-    m_sci->markerDefine(QsciScintilla::Invisible, M_PAD);
-
     // M_PTR0 (2): right triangle
     m_sci->markerDefine(QsciScintilla::RightTriangle, M_PTR0);
 
@@ -1037,9 +1035,6 @@ bool RcxEditor::resolvedSpanFor(int line, EditTarget t,
 
     if (lm->nodeIdx < 0) return false;
 
-    // Padding: reject value editing (hex bytes are display-only)
-    if (t == EditTarget::Value && lm->nodeKind == NodeKind::Padding)
-        return false;
     // Hex nodes: only Type is editable (ASCII preview + hex bytes are display-only)
     if ((t == EditTarget::Name || t == EditTarget::Value) && isHexNode(lm->nodeKind))
         return false;
@@ -1220,9 +1215,6 @@ static bool hitTestTarget(QsciScintilla* sci,
         }
         return false;
     }
-    // Padding nodes: hex bytes are display-only, not editable
-    if (outTarget == EditTarget::Value && lm.nodeKind == NodeKind::Padding)
-        return false;
     // Hex nodes: only Type is editable (ASCII preview + hex bytes are display-only)
     if ((outTarget == EditTarget::Name || outTarget == EditTarget::Value) && isHexNode(lm.nodeKind))
         return false;
@@ -1329,7 +1321,15 @@ bool RcxEditor::eventFilter(QObject* obj, QEvent* event) {
                 // Single-click on editable token of already-selected node → edit
                 int tLine, tCol; EditTarget t;
                 if (hitTestTarget(m_sci, m_meta, me->pos(), tLine, tCol, t)) {
-                    if (alreadySelected && plain) {
+                    // Type/ArrayElementType/PointerTarget open a dismissible popup
+                    // (not inline text edit), so allow on first click without
+                    // requiring the node to be pre-selected.
+                    bool isPopupTarget = (t == EditTarget::Type
+                                       || t == EditTarget::ArrayElementType
+                                       || t == EditTarget::PointerTarget);
+                    if ((alreadySelected || isPopupTarget) && plain) {
+                        if (!alreadySelected)
+                            emit nodeClicked(h.line, h.nodeId, me->modifiers());
                         m_pendingClickNodeId = 0;
                         return beginInlineEdit(t, tLine, tCol);
                     }
@@ -1603,6 +1603,22 @@ bool RcxEditor::handleEditKey(QKeyEvent* ke) {
     case Qt::Key_End:
         m_sci->setCursorPosition(m_editState.line, editEndCol());
         return true;
+    case Qt::Key_V:
+        if (ke->modifiers() & Qt::ControlModifier) {
+            // Sanitized paste: strip newlines (and backticks for base addresses)
+            QString clip = QApplication::clipboard()->text();
+            clip.remove('\n');
+            clip.remove('\r');
+            if (m_editState.target == EditTarget::BaseAddress)
+                clip.remove('`');
+            if (!clip.isEmpty()) {
+                QByteArray utf8 = clip.toUtf8();
+                m_sci->SendScintilla(QsciScintillaBase::SCI_REPLACESEL,
+                                     (uintptr_t)0, utf8.constData());
+            }
+            return true;
+        }
+        return false;
     default:
         return false;
     }
@@ -1656,9 +1672,6 @@ bool RcxEditor::beginInlineEdit(EditTarget target, int line, int col) {
         (target == EditTarget::BaseAddress || target == EditTarget::Source
          || target == EditTarget::RootClassType || target == EditTarget::RootClassName)))
         return false;
-    // Padding: reject value editing (display-only hex bytes)
-    if (target == EditTarget::Value && lm->nodeKind == NodeKind::Padding)
-        return false;
     // Hex nodes: only Type is editable (ASCII preview + hex bytes are display-only)
     if ((target == EditTarget::Name || target == EditTarget::Value) && isHexNode(lm->nodeKind))
         return false;
@@ -1961,7 +1974,7 @@ void RcxEditor::showSourcePicker() {
     int zoom = (int)m_sci->SendScintilla(QsciScintillaBase::SCI_GETZOOM);
     menuFont.setPointSize(menuFont.pointSize() + zoom);
     menu.setFont(menuFont);
-    menu.addAction("file");
+    menu.addAction("File");
 
     // Add all registered providers from global registry
     const auto& providers = ProviderRegistry::instance().providers();

src/format.cpp

@@ -293,7 +293,6 @@ static QString readValueImpl(const Node& node, const Provider& prov,
         line += QStringLiteral("]");
         return line;
     }
-    case NodeKind::Padding:   return display ? hexVal(prov.readU8(addr)) : rawHex(prov.readU8(addr), 2);
     case NodeKind::UTF8: {
         QByteArray bytes = prov.readBytes(addr, node.strLen);
         int end = bytes.indexOf('\0');
@@ -344,21 +343,8 @@ QString fmtNodeLine(const Node& node, const Provider& prov,
         return ind + QString(prefixW, ' ') + val + cmtSuffix;
     }
 
-    // Hex nodes and Padding: hex byte preview (ASCII padded to colName to align with value column)
+    // Hex nodes: hex byte preview (ASCII padded to colName to align with value column)
     if (isHexPreview(node.kind)) {
-        if (node.kind == NodeKind::Padding) {
-            const int totalSz = qMax(1, node.arrayLen);
-            const int lineOff = subLine * 8;
-            const int lineBytes = qMin(8, totalSz - lineOff);
-            QByteArray b = prov.isReadable(addr + lineOff, lineBytes)
-                ? prov.readBytes(addr + lineOff, lineBytes) : QByteArray(lineBytes, '\0');
-            QString ascii = bytesToAscii(b, lineBytes).leftJustified(colName, ' ');
-            QString hex = bytesToHex(b, lineBytes).leftJustified(23, ' '); // 8*3-1
-            if (subLine == 0)
-                return ind + type + SEP + ascii + SEP + hex + cmtSuffix;
-            return ind + QString(colType + (int)SEP.size(), ' ') + ascii + SEP + hex + cmtSuffix;
-        }
-        // Hex8..Hex64: single line, ASCII padded to colName so hex column aligns with value column
         const int sz = sizeForKind(node.kind);
         QByteArray b = prov.isReadable(addr, sz)
             ? prov.readBytes(addr, sz) : QByteArray(sz, '\0');

src/generator.cpp

@@ -50,7 +50,6 @@ static QString cTypeName(NodeKind kind) {
     case NodeKind::Mat4x4:    return QStringLiteral("float");
     case NodeKind::UTF8:      return QStringLiteral("char");
     case NodeKind::UTF16:     return QStringLiteral("wchar_t");
-    case NodeKind::Padding:   return QStringLiteral("uint8_t");
     default:                  return QStringLiteral("uint8_t");
     }
 }
@@ -123,8 +122,6 @@ static QString emitField(GenContext& ctx, const Node& node) {
         return QStringLiteral("    %1 %2[%3];").arg(ctx.cType(NodeKind::UTF8), name).arg(node.strLen) + oc;
     case NodeKind::UTF16:
         return QStringLiteral("    %1 %2[%3];").arg(ctx.cType(NodeKind::UTF16), name).arg(node.strLen) + oc;
-    case NodeKind::Padding:
-        return QStringLiteral("    %1 %2[%3];").arg(ctx.cType(NodeKind::Padding), name).arg(qMax(1, node.arrayLen)) + oc;
     case NodeKind::Pointer32: {
         if (node.refId != 0) {
             int refIdx = tree.indexOfId(node.refId);
@@ -169,7 +166,7 @@ static void emitStructBody(GenContext& ctx, uint64_t structId) {
     auto emitPadRun = [&](int offset, int size) {
         if (size <= 0) return;
         ctx.output += QStringLiteral("    %1 %2[0x%3];%4\n")
-            .arg(ctx.cType(NodeKind::Padding))
+            .arg(QStringLiteral("uint8_t"))
             .arg(ctx.uniquePadName())
             .arg(QString::number(size, 16).toUpper())
             .arg(offsetComment(offset));

src/main.cpp

@@ -43,9 +43,11 @@
 #include <QDesktopServices>
 #include "themes/thememanager.h"
 #include "themes/themeeditor.h"
+#include "optionsdialog.h"
 
 #ifdef _WIN32
 #include <windows.h>
+#include <windowsx.h>
 #include <dwmapi.h>
 #include <dbghelp.h>
 #include <cstdio>
@@ -140,7 +142,9 @@ public:
             if ((w->windowFlags() & Qt::Window) == Qt::Window
                 && !w->property("DarkTitleBar").toBool()) {
                 w->setProperty("DarkTitleBar", true);
+#ifdef _WIN32
                 setDarkTitleBar(w);
+#endif
             }
         }
         return QApplication::notify(receiver, event);
@@ -159,6 +163,13 @@ public:
             s = QSize(s.width() + 24, s.height() + 4);
         return s;
     }
+    int pixelMetric(PixelMetric metric, const QStyleOption* opt,
+                    const QWidget* w) const override {
+        // Kill the 1px frame margin Fusion reserves around QMenu contents
+        if (metric == PM_MenuPanelWidth)
+            return 0;
+        return QProxyStyle::pixelMetric(metric, opt, w);
+    }
     void drawPrimitive(PrimitiveElement elem, const QStyleOption* opt,
                        QPainter* p, const QWidget* w) const override {
         // Kill Fusion's 3D bevel on QMenu — the OS drop shadow is enough
@@ -204,7 +215,7 @@ static void applyGlobalTheme(const rcx::Theme& theme) {
     QPalette pal;
     pal.setColor(QPalette::Window,          theme.background);
     pal.setColor(QPalette::WindowText,      theme.text);
-    pal.setColor(QPalette::Base,            theme.backgroundAlt);
+    pal.setColor(QPalette::Base,            theme.background);
     pal.setColor(QPalette::AlternateBase,   theme.surface);
     pal.setColor(QPalette::Text,            theme.text);
     pal.setColor(QPalette::Button,          theme.button);
@@ -230,6 +241,21 @@ static void applyGlobalTheme(const rcx::Theme& theme) {
     qApp->setStyleSheet(QString());
 }
 
+class BorderOverlay : public QWidget {
+public:
+    QColor color;
+    explicit BorderOverlay(QWidget* parent) : QWidget(parent) {
+        setAttribute(Qt::WA_TransparentForMouseEvents);
+        setAttribute(Qt::WA_NoSystemBackground);
+        setFocusPolicy(Qt::NoFocus);
+    }
+    void paintEvent(QPaintEvent*) override {
+        QPainter p(this);
+        p.setPen(color);
+        p.drawRect(0, 0, width() - 1, height() - 1);
+    }
+};
+
 namespace rcx {
 
 // MainWindow class declaration is in mainwindow.h
@@ -238,6 +264,32 @@ MainWindow::MainWindow(QWidget* parent) : QMainWindow(parent) {
     setWindowTitle("Reclass");
     resize(1200, 800);
 
+    // Frameless window with system menu (Alt+Space) and min/max/close support
+    setWindowFlags(Qt::FramelessWindowHint | Qt::WindowSystemMenuHint
+                   | Qt::WindowMinMaxButtonsHint);
+
+    // Custom title bar (replaces native menu bar area in QMainWindow)
+    m_titleBar = new TitleBarWidget(this);
+    m_titleBar->applyTheme(ThemeManager::instance().current());
+    setMenuWidget(m_titleBar);
+
+#ifdef _WIN32
+    // 1px top margin preserves DWM drop shadow on the frameless window
+    {
+        auto hwnd = reinterpret_cast<HWND>(winId());
+        MARGINS margins = {0, 0, 1, 0};
+        DwmExtendFrameIntoClientArea(hwnd, &margins);
+    }
+#endif
+
+    // Border overlay — draws a 1px colored border on top of everything
+    auto* overlay = new BorderOverlay(this);
+    m_borderOverlay = overlay;
+    overlay->color = ThemeManager::instance().current().borderFocused;
+    overlay->setGeometry(rect());
+    overlay->raise();
+    overlay->show();
+
     m_mdiArea = new QMdiArea(this);
     m_mdiArea->setViewMode(QMdiArea::TabbedView);
     m_mdiArea->setTabsClosable(true);
@@ -246,27 +298,24 @@ MainWindow::MainWindow(QWidget* parent) : QMainWindow(parent) {
         const auto& t = ThemeManager::instance().current();
         m_mdiArea->setStyleSheet(QStringLiteral(
             "QTabBar::tab {"
-            "  background: %1; color: %2; padding: 6px 16px; border: none;"
+            "  background: %1; color: %2; padding: 0px 16px; border: none; height: 24px;"
             "}"
             "QTabBar::tab:selected { color: %3; background: %4; }"
             "QTabBar::tab:hover { color: %3; background: %5; }")
             .arg(t.background.name(), t.textMuted.name(), t.text.name(),
                  t.backgroundAlt.name(), t.hover.name()));
     }
-    {
-        QSettings settings("Reclass", "Reclass");
-        QString fontName = settings.value("font", "JetBrains Mono").toString();
-        QFont f(fontName, 12);
-        f.setFixedPitch(true);
-        if (auto* tb = m_mdiArea->findChild<QTabBar*>())
-            tb->setFont(f);
-    }
     setCentralWidget(m_mdiArea);
 
     createWorkspaceDock();
     createMenus();
     createStatusBar();
 
+    // Restore menu bar title case setting (after menus are created)
+    {
+        bool titleCase = QSettings("Reclass", "Reclass").value("menuBarTitleCase", true).toBool();
+        m_titleBar->setMenuBarTitleCase(titleCase);
+    }
 
     // MenuBarStyle is set as app style in main() — covers both QMenuBar and QMenu
 
@@ -276,9 +325,10 @@ MainWindow::MainWindow(QWidget* parent) : QMainWindow(parent) {
     // Load plugins
     m_pluginManager.LoadPlugins();
 
-    // MCP bridge (on by default)
+    // Start MCP bridge
     m_mcp = new McpBridge(this, this);
-    m_mcp->start();
+    if (QSettings("Reclass", "Reclass").value("autoStartMcp", false).toBool())
+        m_mcp->start();
 
     connect(m_mdiArea, &QMdiArea::subWindowActivated,
             this, [this](QMdiSubWindow*) {
@@ -306,29 +356,31 @@ QIcon MainWindow::makeIcon(const QString& svgPath) {
 
 void MainWindow::createMenus() {
     // File
-    auto* file = menuBar()->addMenu("&File");
-    file->addAction("&New", this, &MainWindow::newDocument, QKeySequence::New);
-    file->addAction("New &Tab", this, &MainWindow::newFile, QKeySequence(Qt::CTRL | Qt::Key_T));
-    file->addAction(makeIcon(":/vsicons/folder-opened.svg"), "&Open...", this, &MainWindow::openFile, QKeySequence::Open);
+    auto* file = m_titleBar->menuBar()->addMenu("&File");
+    file->addAction("&New", QKeySequence::New, this, &MainWindow::newDocument);
+    file->addAction("New &Tab", QKeySequence(Qt::CTRL | Qt::Key_T), this, &MainWindow::newFile);
+    file->addAction(makeIcon(":/vsicons/folder-opened.svg"), "&Open...", QKeySequence::Open, this, &MainWindow::openFile);
     file->addSeparator();
-    file->addAction(makeIcon(":/vsicons/save.svg"), "&Save", this, &MainWindow::saveFile, QKeySequence::Save);
-    file->addAction(makeIcon(":/vsicons/save-as.svg"), "Save &As...", this, &MainWindow::saveFileAs, QKeySequence::SaveAs);
+    file->addAction(makeIcon(":/vsicons/save.svg"), "&Save", QKeySequence::Save, this, &MainWindow::saveFile);
+    file->addAction(makeIcon(":/vsicons/save-as.svg"), "Save &As...", QKeySequence::SaveAs, this, &MainWindow::saveFileAs);
     file->addSeparator();
     file->addAction(makeIcon(":/vsicons/export.svg"), "Export &C++ Header...", this, &MainWindow::exportCpp);
     file->addSeparator();
-    m_mcpAction = file->addAction("Stop &MCP Server", this, &MainWindow::toggleMcp);
+    m_mcpAction = file->addAction(QSettings("Reclass", "Reclass").value("autoStartMcp", false).toBool() ? "Stop &MCP Server" : "Start &MCP Server", this, &MainWindow::toggleMcp);
     file->addSeparator();
-    file->addAction(makeIcon(":/vsicons/close.svg"), "E&xit", this, &QMainWindow::close, QKeySequence(Qt::Key_Close));
+    file->addAction(makeIcon(":/vsicons/settings-gear.svg"), "&Options...", this, &MainWindow::showOptionsDialog);
+    file->addSeparator();
+    file->addAction(makeIcon(":/vsicons/close.svg"), "E&xit", QKeySequence(Qt::Key_Close), this, &QMainWindow::close);
 
     // Edit
-    auto* edit = menuBar()->addMenu("&Edit");
-    edit->addAction(makeIcon(":/vsicons/arrow-left.svg"), "&Undo", this, &MainWindow::undo, QKeySequence::Undo);
-    edit->addAction(makeIcon(":/vsicons/arrow-right.svg"), "&Redo", this, &MainWindow::redo, QKeySequence::Redo);
+    auto* edit = m_titleBar->menuBar()->addMenu("&Edit");
+    edit->addAction(makeIcon(":/vsicons/arrow-left.svg"), "&Undo", QKeySequence::Undo, this, &MainWindow::undo);
+    edit->addAction(makeIcon(":/vsicons/arrow-right.svg"), "&Redo", QKeySequence::Redo, this, &MainWindow::redo);
     edit->addSeparator();
     edit->addAction("&Type Aliases...", this, &MainWindow::showTypeAliasesDialog);
 
     // View
-    auto* view = menuBar()->addMenu("&View");
+    auto* view = m_titleBar->menuBar()->addMenu("&View");
     view->addAction(makeIcon(":/vsicons/split-horizontal.svg"), "Split &Horizontal", this, &MainWindow::splitView);
     view->addAction(makeIcon(":/vsicons/chrome-close.svg"), "&Unsplit", this, &MainWindow::unsplitView);
     view->addSeparator();
@@ -368,28 +420,38 @@ void MainWindow::createMenus() {
     themeMenu->addAction("Edit Theme...", this, &MainWindow::editTheme);
 
     view->addSeparator();
+    auto* actShowIcon = view->addAction("Show &Icon");
+    actShowIcon->setCheckable(true);
+    actShowIcon->setChecked(settings.value("showIcon", false).toBool());
+    if (actShowIcon->isChecked()) m_titleBar->setShowIcon(true);
+    connect(actShowIcon, &QAction::toggled, this, [this](bool checked) {
+        m_titleBar->setShowIcon(checked);
+        QSettings s("Reclass", "Reclass");
+        s.setValue("showIcon", checked);
+    });
     view->addAction(m_workspaceDock->toggleViewAction());
 
     // Node
-    auto* node = menuBar()->addMenu("&Node");
-    node->addAction(makeIcon(":/vsicons/add.svg"), "&Add Field", this, &MainWindow::addNode, QKeySequence(Qt::Key_Insert));
-    node->addAction(makeIcon(":/vsicons/remove.svg"), "&Remove Field", this, &MainWindow::removeNode, QKeySequence::Delete);
-    node->addAction(makeIcon(":/vsicons/symbol-structure.svg"), "Change &Type", this, &MainWindow::changeNodeType, QKeySequence(Qt::Key_T));
-    node->addAction(makeIcon(":/vsicons/edit.svg"), "Re&name", this, &MainWindow::renameNodeAction, QKeySequence(Qt::Key_F2));
+    auto* node = m_titleBar->menuBar()->addMenu("&Node");
+    node->addAction(makeIcon(":/vsicons/add.svg"), "&Add Field", QKeySequence(Qt::Key_Insert), this, &MainWindow::addNode);
+    node->addAction(makeIcon(":/vsicons/remove.svg"), "&Remove Field", QKeySequence::Delete, this, &MainWindow::removeNode);
+    node->addAction(makeIcon(":/vsicons/symbol-structure.svg"), "Change &Type", QKeySequence(Qt::Key_T), this, &MainWindow::changeNodeType);
+    node->addAction(makeIcon(":/vsicons/edit.svg"), "Re&name", QKeySequence(Qt::Key_F2), this, &MainWindow::renameNodeAction);
     node->addAction(makeIcon(":/vsicons/files.svg"), "D&uplicate", this, &MainWindow::duplicateNodeAction)->setShortcut(QKeySequence(Qt::CTRL | Qt::Key_D));
 
     // Plugins
-    auto* plugins = menuBar()->addMenu("&Plugins");
+    auto* plugins = m_titleBar->menuBar()->addMenu("&Plugins");
     plugins->addAction("&Manage Plugins...", this, &MainWindow::showPluginsDialog);
 
     // Help
-    auto* help = menuBar()->addMenu("&Help");
+    auto* help = m_titleBar->menuBar()->addMenu("&Help");
     help->addAction(makeIcon(":/vsicons/question.svg"), "&About Reclass", this, &MainWindow::about);
 }
 
 void MainWindow::createStatusBar() {
     m_statusLabel = new QLabel("Ready");
     m_statusLabel->setContentsMargins(10, 0, 0, 0);
+    statusBar()->setContentsMargins(0, 4, 0, 4);
     statusBar()->addWidget(m_statusLabel, 1);
     {
         const auto& t = ThemeManager::instance().current();
@@ -399,20 +461,9 @@ void MainWindow::createStatusBar() {
         statusBar()->setPalette(sbPal);
         statusBar()->setAutoFillBackground(true);
     }
-
-    QSettings settings("Reclass", "Reclass");
-    QString fontName = settings.value("font", "JetBrains Mono").toString();
-    QFont f(fontName, 12);
-    f.setFixedPitch(true);
-    statusBar()->setFont(f);
 }
 
 void MainWindow::applyTabWidgetStyle(QTabWidget* tw) {
-    QSettings settings("Reclass", "Reclass");
-    QString fontName = settings.value("font", "JetBrains Mono").toString();
-    QFont tabFont(fontName, 12);
-    tabFont.setFixedPitch(true);
-    tw->tabBar()->setFont(tabFont);
     const auto& t = ThemeManager::instance().current();
     tw->setStyleSheet(QStringLiteral(
         "QTabWidget::pane { border: none; }"
@@ -426,6 +477,37 @@ void MainWindow::applyTabWidgetStyle(QTabWidget* tw) {
     tw->tabBar()->setExpanding(false);
 }
 
+void MainWindow::styleTabCloseButtons() {
+    auto* tabBar = m_mdiArea->findChild<QTabBar*>();
+    if (!tabBar) return;
+
+    const auto& t = ThemeManager::instance().current();
+    QString style = QStringLiteral(
+        "QToolButton { color: %1; border: none; padding: 0px 4px 2px 4px; font-size: 12px; }"
+        "QToolButton:hover { color: %2; }")
+        .arg(t.textDim.name(), t.indHoverSpan.name());
+
+    auto subs = m_mdiArea->subWindowList();
+    for (int i = 0; i < tabBar->count() && i < subs.size(); i++) {
+        auto* existing = qobject_cast<QToolButton*>(
+            tabBar->tabButton(i, QTabBar::RightSide));
+        if (existing && existing->text() == QStringLiteral("\u2715")) {
+            // Already our button, just restyle
+            existing->setStyleSheet(style);
+            continue;
+        }
+        // Replace with ✕ text button
+        auto* btn = new QToolButton(tabBar);
+        btn->setText(QStringLiteral("\u2715"));
+        btn->setAutoRaise(true);
+        btn->setCursor(Qt::PointingHandCursor);
+        btn->setStyleSheet(style);
+        QMdiSubWindow* sub = subs[i];
+        connect(btn, &QToolButton::clicked, sub, &QMdiSubWindow::close);
+        tabBar->setTabButton(i, QTabBar::RightSide, btn);
+    }
+}
+
 MainWindow::SplitPane MainWindow::createSplitPane(TabState& tab) {
     SplitPane pane;
 
@@ -601,6 +683,7 @@ QMdiSubWindow* MainWindow::createTab(RcxDocument* doc) {
                         sub->setWindowTitle(rootName(it2->doc->tree, it2->ctrl->viewRootId()));
                 }
                 updateWindowTitle();
+                rebuildWorkspaceModel();
             });
     });
 
@@ -614,6 +697,7 @@ QMdiSubWindow* MainWindow::createTab(RcxDocument* doc) {
 
     ctrl->refresh();
     rebuildWorkspaceModel();
+    styleTabCloseButtons();
     return sub;
 }
 
@@ -672,6 +756,25 @@ static void buildBallDemo(NodeTree& tree) {
 
     // Material[2] materials at offset 128 (112 + 16 for float[4])
     { Node n; n.kind = NodeKind::Array; n.name = "materials"; n.parentId = ballId; n.offset = 128; n.elementKind = NodeKind::Struct; n.arrayLen = 2; n.refId = matId; tree.addNode(n); }
+
+    // Unnamed struct (128 bytes of hex64 fields)
+    Node unnamed;
+    unnamed.kind = NodeKind::Struct;
+    unnamed.name = "instance";
+    unnamed.structTypeName = "Unnamed";
+    unnamed.parentId = 0;
+    unnamed.offset = 0;
+    int ui = tree.addNode(unnamed);
+    uint64_t unnamedId = tree.nodes[ui].id;
+
+    for (int i = 0; i < 16; i++) {
+        Node n;
+        n.kind = NodeKind::Hex64;
+        n.name = QStringLiteral("field_%1").arg(i * 8, 2, 16, QChar('0'));
+        n.parentId = unnamedId;
+        n.offset = i * 8;
+        tree.addNode(n);
+    }
 }
 
 void MainWindow::newFile() {
@@ -879,16 +982,25 @@ void MainWindow::toggleMcp() {
 void MainWindow::applyTheme(const Theme& theme) {
     applyGlobalTheme(theme);
 
+    // Custom title bar
+    m_titleBar->applyTheme(theme);
+
+    // Update border overlay color
+    updateBorderColor(isActiveWindow() ? theme.borderFocused : theme.border);
+
     // MDI area tabs
     m_mdiArea->setStyleSheet(QStringLiteral(
         "QTabBar::tab {"
-        "  background: %1; color: %2; padding: 6px 16px; border: none;"
+        "  background: %1; color: %2; padding: 0px 16px; border: none; height: 24px;"
         "}"
         "QTabBar::tab:selected { color: %3; background: %4; }"
         "QTabBar::tab:hover { color: %3; background: %5; }")
         .arg(theme.background.name(), theme.textMuted.name(), theme.text.name(),
              theme.backgroundAlt.name(), theme.hover.name()));
 
+    // Re-style ✕ close buttons on MDI tabs
+    styleTabCloseButtons();
+
     // Status bar
     {
         QPalette sbPal = statusBar()->palette();
@@ -897,6 +1009,13 @@ void MainWindow::applyTheme(const Theme& theme) {
         statusBar()->setPalette(sbPal);
     }
 
+    // Workspace tree: text color matches menu bar
+    if (m_workspaceTree) {
+        QPalette tp = m_workspaceTree->palette();
+        tp.setColor(QPalette::Text, theme.textDim);
+        m_workspaceTree->setPalette(tp);
+    }
+
     // Split pane tab widgets
     for (auto& state : m_tabs) {
         for (auto& pane : state.panes) {
@@ -910,21 +1029,45 @@ void MainWindow::editTheme() {
     int idx = tm.currentIndex();
     ThemeEditor dlg(idx, this);
     if (dlg.exec() == QDialog::Accepted) {
-        tm.revertPreview();
-        int selectedIdx = dlg.selectedIndex();
-        Theme edited = dlg.result();
-        // Switch to selected theme first (if changed)
-        if (selectedIdx != idx && selectedIdx >= 0 && selectedIdx < tm.themes().size())
-            tm.setCurrent(selectedIdx);
-        // Apply edits
-        int applyIdx = selectedIdx >= 0 ? selectedIdx : idx;
-        if (applyIdx >= 0 && applyIdx < tm.themes().size())
-            tm.updateTheme(applyIdx, edited);
+        tm.updateTheme(dlg.selectedIndex(), dlg.result());
     } else {
         tm.revertPreview();
     }
 }
 
+// TODO: when adding more and more options, this func becomes very clunky. Fix
+void MainWindow::showOptionsDialog() {
+    auto& tm = ThemeManager::instance();
+    OptionsResult current;
+    current.themeIndex = tm.currentIndex();
+    current.fontName = QSettings("Reclass", "Reclass").value("font", "JetBrains Mono").toString();
+    current.menuBarTitleCase = m_titleBar->menuBarTitleCase();
+    current.safeMode = QSettings("Reclass", "Reclass").value("safeMode", false).toBool();
+    current.autoStartMcp = QSettings("Reclass", "Reclass").value("autoStartMcp", false).toBool();
+
+    OptionsDialog dlg(current, this);
+    if (dlg.exec() != QDialog::Accepted) return; // OptionsDialog doesn't apply anything. Only apply on OK
+
+    auto r = dlg.result();
+
+    if (r.themeIndex != current.themeIndex)
+        tm.setCurrent(r.themeIndex);
+
+    if (r.fontName != current.fontName)
+        setEditorFont(r.fontName);
+
+    if (r.menuBarTitleCase != current.menuBarTitleCase) {
+        m_titleBar->setMenuBarTitleCase(r.menuBarTitleCase);
+        QSettings("Reclass", "Reclass").setValue("menuBarTitleCase", r.menuBarTitleCase);
+    }
+
+    if (r.safeMode != current.safeMode)
+        QSettings("Reclass", "Reclass").setValue("safeMode", r.safeMode);
+
+    if (r.autoStartMcp != current.autoStartMcp)
+        QSettings("Reclass", "Reclass").setValue("autoStartMcp", r.autoStartMcp);
+}
+
 void MainWindow::setEditorFont(const QString& fontName) {
     QSettings settings("Reclass", "Reclass");
     settings.setValue("font", fontName);
@@ -943,9 +1086,6 @@ void MainWindow::setEditorFont(const QString& fontName) {
                 }
                 pane.rendered->setMarginsFont(f);
             }
-            // Update per-pane tab bar font
-            if (pane.tabWidget)
-                applyTabWidgetStyle(pane.tabWidget);
         }
     }
     // Sync workspace tree font
@@ -953,11 +1093,6 @@ void MainWindow::setEditorFont(const QString& fontName) {
         m_workspaceTree->setFont(f);
     // Sync status bar font
     statusBar()->setFont(f);
-    // Sync MDI tab bar font
-    if (auto* tb = m_mdiArea->findChild<QTabBar*>())
-        tb->setFont(f);
-    // Sync menu bar / menu font via global stylesheet
-    applyGlobalTheme(ThemeManager::instance().current());
 }
 
 RcxController* MainWindow::activeController() const {
@@ -984,6 +1119,7 @@ MainWindow::TabState* MainWindow::tabByIndex(int index) {
 }
 
 void MainWindow::updateWindowTitle() {
+    QString title;
     auto* sub = m_mdiArea->activeSubWindow();
     if (sub && m_tabs.contains(sub)) {
         auto& tab = m_tabs[sub];
@@ -991,10 +1127,11 @@ void MainWindow::updateWindowTitle() {
                        ? rootName(tab.doc->tree, tab.ctrl->viewRootId())
                        : QFileInfo(tab.doc->filePath).fileName();
         if (tab.doc->modified) name += " *";
-        setWindowTitle(name + " - Reclass");
+        title = name + " - Reclass";
     } else {
-        setWindowTitle("Reclass");
+        title = "Reclass";
     }
+    setWindowTitle(title);
 }
 
 // ── Rendered view setup ──
@@ -1287,7 +1424,7 @@ void MainWindow::project_close(QMdiSubWindow* sub) {
 // ── Workspace Dock ──
 
 void MainWindow::createWorkspaceDock() {
-    m_workspaceDock = new QDockWidget("Workspace", this);
+    m_workspaceDock = new QDockWidget("Project Tree", this);
     m_workspaceDock->setObjectName("WorkspaceDock");
     m_workspaceDock->setAllowedAreas(Qt::LeftDockWidgetArea | Qt::RightDockWidgetArea);
 
@@ -1297,81 +1434,51 @@ void MainWindow::createWorkspaceDock() {
     m_workspaceTree->setModel(m_workspaceModel);
     m_workspaceTree->setHeaderHidden(true);
     m_workspaceTree->setEditTriggers(QAbstractItemView::NoEditTriggers);
-
-    // Match editor font
-    {
-        QSettings settings("Reclass", "Reclass");
-        QString fontName = settings.value("font", "JetBrains Mono").toString();
-        QFont f(fontName, 12);
-        f.setFixedPitch(true);
-        m_workspaceTree->setFont(f);
-    }
+    m_workspaceTree->setExpandsOnDoubleClick(false);
+    m_workspaceTree->setMouseTracking(true);
 
     m_workspaceDock->setWidget(m_workspaceTree);
     addDockWidget(Qt::LeftDockWidgetArea, m_workspaceDock);
     m_workspaceDock->hide();
 
+
     connect(m_workspaceTree, &QTreeView::doubleClicked, this, [this](const QModelIndex& index) {
-        // Data roles: UserRole=QMdiSubWindow*, UserRole+1=structId, UserRole+2=nodeId
+        auto structIdVar = index.data(Qt::UserRole + 1);
+        uint64_t structId = structIdVar.isValid() ? structIdVar.toULongLong() : 0;
+
+        if (structId == rcx::kGroupSentinel) {
+            // "Project" folder: toggle expand/collapse
+            m_workspaceTree->setExpanded(index, !m_workspaceTree->isExpanded(index));
+            return;
+        }
+
         auto subVar = index.data(Qt::UserRole);
         if (!subVar.isValid()) return;
-
         auto* sub = static_cast<QMdiSubWindow*>(subVar.value<void*>());
         if (!sub || !m_tabs.contains(sub)) return;
 
         m_mdiArea->setActiveSubWindow(sub);
 
-        auto structIdVar = index.data(Qt::UserRole + 1);
-        auto nodeIdVar   = index.data(Qt::UserRole + 2);
-
-        if (structIdVar.isValid()) {
-            // Double-clicked a struct: set as view root
-            uint64_t structId = structIdVar.toULongLong();
-            auto& tree = m_tabs[sub].doc->tree;
-            int ni = tree.indexOfId(structId);
-            if (ni >= 0) tree.nodes[ni].collapsed = false;
-            m_tabs[sub].ctrl->setViewRootId(structId);
-            m_tabs[sub].ctrl->scrollToNodeId(structId);
-        } else if (nodeIdVar.isValid()) {
-            // Double-clicked a field: find its root struct, set as view root, scroll to field
-            uint64_t nodeId = nodeIdVar.toULongLong();
-            auto& tree = m_tabs[sub].doc->tree;
-            // Walk up to find root struct
-            uint64_t rootId = 0;
-            uint64_t cur = nodeId;
-            while (cur != 0) {
-                int idx = tree.indexOfId(cur);
-                if (idx < 0) break;
-                if (tree.nodes[idx].parentId == 0) { rootId = cur; break; }
-                cur = tree.nodes[idx].parentId;
-            }
-            if (rootId != 0) {
-                int ri = tree.indexOfId(rootId);
-                if (ri >= 0) tree.nodes[ri].collapsed = false;
-                m_tabs[sub].ctrl->setViewRootId(rootId);
-            }
-            m_tabs[sub].ctrl->scrollToNodeId(nodeId);
-        } else if (!index.parent().isValid()) {
-            // Double-clicked project root: clear view root to show all
-            m_tabs[sub].ctrl->setViewRootId(0);
-        }
+        // Type/Enum node: navigate to it
+        auto& tree = m_tabs[sub].doc->tree;
+        int ni = tree.indexOfId(structId);
+        if (ni >= 0) tree.nodes[ni].collapsed = false;
+        m_tabs[sub].ctrl->setViewRootId(structId);
+        m_tabs[sub].ctrl->scrollToNodeId(structId);
     });
 }
 
 void MainWindow::rebuildWorkspaceModel() {
-    m_workspaceModel->clear();
-
-    auto* sub = m_mdiArea->activeSubWindow();
-    if (!sub || !m_tabs.contains(sub)) return;
-
-    TabState& tab = m_tabs[sub];
-    QString tabName = tab.doc->filePath.isEmpty()
-        ? rootName(tab.doc->tree, tab.ctrl->viewRootId())
-        : QFileInfo(tab.doc->filePath).fileName();
-
-    buildWorkspaceModel(m_workspaceModel, tab.doc->tree, tabName,
-                        static_cast<void*>(sub));
-    m_workspaceTree->expandAll();
+    QVector<rcx::TabInfo> tabs;
+    for (auto it = m_tabs.begin(); it != m_tabs.end(); ++it) {
+        TabState& tab = it.value();
+        QString name = tab.doc->filePath.isEmpty()
+            ? rootName(tab.doc->tree, tab.ctrl->viewRootId())
+            : QFileInfo(tab.doc->filePath).fileName();
+        tabs.append({ &tab.doc->tree, name, static_cast<void*>(it.key()) });
+    }
+    rcx::buildProjectExplorer(m_workspaceModel, tabs);
+    m_workspaceTree->expandToDepth(1);
 }
 
 void MainWindow::showPluginsDialog() {
@@ -1474,6 +1581,29 @@ void MainWindow::showPluginsDialog() {
     dialog.exec();
 }
 
+void MainWindow::changeEvent(QEvent* event) {
+    QMainWindow::changeEvent(event);
+    if (event->type() == QEvent::ActivationChange) {
+        const auto& t = ThemeManager::instance().current();
+        updateBorderColor(isActiveWindow() ? t.borderFocused : t.border);
+    }
+    if (event->type() == QEvent::WindowStateChange)
+        m_titleBar->updateMaximizeIcon();
+}
+
+void MainWindow::resizeEvent(QResizeEvent* event) {
+    QMainWindow::resizeEvent(event);
+    if (m_borderOverlay) {
+        m_borderOverlay->setGeometry(rect());
+        m_borderOverlay->raise();
+    }
+}
+
+void MainWindow::updateBorderColor(const QColor& color) {
+    static_cast<BorderOverlay*>(m_borderOverlay)->color = color;
+    m_borderOverlay->update();
+}
+
 } // namespace rcx
 
 // ── Entry point ──

src/mainwindow.h

@@ -1,5 +1,6 @@
 #pragma once
 #include "controller.h"
+#include "titlebar.h"
 #include "pluginmanager.h"
 #include <QMainWindow>
 #include <QMdiArea>
@@ -48,6 +49,7 @@ private slots:
     void exportCpp();
     void showTypeAliasesDialog();
     void editTheme();
+    void showOptionsDialog();
 
 public:
     // Project Lifecycle API
@@ -59,11 +61,13 @@ public:
 private:
     enum ViewMode { VM_Reclass, VM_Rendered };
 
-    QMdiArea* m_mdiArea;
-    QLabel*   m_statusLabel;
-    PluginManager m_pluginManager;
-    McpBridge*    m_mcp       = nullptr;
-    QAction*      m_mcpAction = nullptr;
+    QMdiArea*       m_mdiArea;
+    QLabel*         m_statusLabel;
+    TitleBarWidget* m_titleBar = nullptr;
+    QWidget*        m_borderOverlay = nullptr;
+    PluginManager   m_pluginManager;
+    McpBridge*      m_mcp       = nullptr;
+    QAction*        m_mcpAction = nullptr;
 
     struct SplitPane {
         QTabWidget*    tabWidget = nullptr;
@@ -104,6 +108,7 @@ private:
     SplitPane createSplitPane(TabState& tab);
     void applyTheme(const Theme& theme);
     void applyTabWidgetStyle(QTabWidget* tw);
+    void styleTabCloseButtons();
     SplitPane* findPaneByTabWidget(QTabWidget* tw);
     SplitPane* findActiveSplitPane();
     RcxEditor* activePaneEditor();
@@ -114,6 +119,11 @@ private:
     QStandardItemModel* m_workspaceModel = nullptr;
     void createWorkspaceDock();
     void rebuildWorkspaceModel();
+    void updateBorderColor(const QColor& color);
+
+protected:
+    void changeEvent(QEvent* event) override;
+    void resizeEvent(QResizeEvent* event) override;
 };
 
 } // namespace rcx

src/mcp/mcp_bridge.cpp

@@ -248,7 +248,7 @@ QJsonObject McpBridge::handleToolsList(const QJsonValue& id) {
                         "collapse: {op:'collapse', nodeId:'ID', collapsed:true}. "
                         "Insert ops get auto-assigned IDs; use $0, $1 etc. to reference them in later ops. "
                         "Kinds: Hex8 Hex16 Hex32 Hex64 Int8 Int16 Int32 Int64 UInt8 UInt16 UInt32 UInt64 "
-                        "Float Double Bool Pointer32 Pointer64 Vec2 Vec3 Vec4 Mat4x4 UTF8 UTF16 Padding Struct Array"},
+                        "Float Double Bool Pointer32 Pointer64 Vec2 Vec3 Vec4 Mat4x4 UTF8 UTF16 Struct Array"},
         {"inputSchema", QJsonObject{
             {"type", "object"},
             {"properties", QJsonObject{

src/optionsdialog.cpp

@@ -0,0 +1,327 @@
+#include "optionsdialog.h"
+#include "themes/thememanager.h"
+#include <QVBoxLayout>
+#include <QHBoxLayout>
+#include <QFormLayout>
+#include <QDialogButtonBox>
+#include <QPushButton>
+#include <QGroupBox>
+#include <QLabel>
+#include <QTreeWidgetItem>
+#include <QGraphicsDropShadowEffect>
+#include <QEvent>
+#include <functional>
+
+namespace rcx {
+
+OptionsDialog::OptionsDialog(const OptionsResult& current, QWidget* parent)
+    : QDialog(parent)
+{
+    setWindowTitle("Options");
+    setFixedSize(700, 450);
+
+    const auto& t = ThemeManager::instance().current();
+
+    auto* mainLayout = new QVBoxLayout(this);
+    mainLayout->setSpacing(8);
+    mainLayout->setContentsMargins(10, 10, 10, 10);
+
+    // -- Middle: left column (search + tree) | right column (pages) --
+    auto* middleLayout = new QHBoxLayout;
+    middleLayout->setSpacing(8);
+
+    // Left column: search bar + tree
+    auto* leftColumn = new QVBoxLayout;
+    leftColumn->setSpacing(4);
+
+    m_search = new QLineEdit;
+    m_search->setPlaceholderText("Search Options (Ctrl+E)");
+    m_search->setClearButtonEnabled(true);
+    connect(m_search, &QLineEdit::textChanged, this, &OptionsDialog::filterTree);
+    leftColumn->addWidget(m_search);
+
+    m_tree = new QTreeWidget;
+    m_tree->setHeaderHidden(true);
+    m_tree->setRootIsDecorated(true);
+    m_tree->setFixedWidth(200);
+
+    auto* envItem = new QTreeWidgetItem(m_tree, {"Environment"});
+    auto* generalItem = new QTreeWidgetItem(envItem, {"General"});
+    m_tree->expandAll();
+    m_tree->setCurrentItem(generalItem);
+    leftColumn->addWidget(m_tree, 1);
+
+    middleLayout->addLayout(leftColumn);
+
+    // Right column: stacked pages with group boxes
+    m_pages = new QStackedWidget;
+
+    // -- General page --
+    auto* generalPage = new QWidget;
+    auto* generalLayout = new QVBoxLayout(generalPage);
+    generalLayout->setContentsMargins(0, 0, 0, 0);
+    generalLayout->setSpacing(8);
+
+    // Visual Experience group box
+    auto* visualGroup = new QGroupBox("Visual Experience");
+    auto* visualLayout = new QFormLayout(visualGroup);
+    visualLayout->setSpacing(8);
+    visualLayout->setFieldGrowthPolicy(QFormLayout::ExpandingFieldsGrow);
+
+    m_themeCombo = new QComboBox;
+    auto& tm = ThemeManager::instance();
+    for (const auto& theme : tm.themes())
+        m_themeCombo->addItem(theme.name);
+    m_themeCombo->setCurrentIndex(current.themeIndex);
+    m_themeCombo->setObjectName("themeCombo");
+    visualLayout->addRow("Color theme:", m_themeCombo);
+
+    m_fontCombo = new QComboBox;
+    m_fontCombo->addItem("JetBrains Mono");
+    m_fontCombo->addItem("Consolas");
+    m_fontCombo->setCurrentText(current.fontName);
+    m_fontCombo->setObjectName("fontCombo");
+    visualLayout->addRow("Editor Font:", m_fontCombo);
+
+    m_titleCaseCheck = new QCheckBox("Apply title case styling to menu bar");
+    m_titleCaseCheck->setChecked(current.menuBarTitleCase);
+    visualLayout->addRow(m_titleCaseCheck);
+
+    generalLayout->addWidget(visualGroup);
+
+    // Safe Mode group box
+    auto* safeModeGroup = new QGroupBox("Preview Features");
+    auto* safeModeLayout = new QVBoxLayout(safeModeGroup);
+    safeModeLayout->setSpacing(4);
+
+    m_safeModeCheck = new QCheckBox("Safe Mode");
+    m_safeModeCheck->setChecked(current.safeMode);
+    m_safeModeCheck->setStyleSheet(QStringLiteral(
+        "QCheckBox { font-weight: bold; }"));
+    safeModeLayout->addWidget(m_safeModeCheck);
+
+    auto* safeModeDesc = new QLabel(
+        "Enable to use the default OS icon for this application and "
+        "create the window with the name of the executable file.");
+    safeModeDesc->setWordWrap(true);
+    safeModeDesc->setContentsMargins(20, 0, 0, 0);  // indent under checkbox
+    safeModeLayout->addWidget(safeModeDesc);
+
+    generalLayout->addWidget(safeModeGroup);
+    generalLayout->addStretch();
+
+    m_pages->addWidget(generalPage);                     // index 0
+    m_pageKeywords[generalItem] = collectPageKeywords(generalPage);
+
+    // -- AI Features page --
+    auto* aiItem = new QTreeWidgetItem(envItem, {"AI Features"});
+
+    auto* aiPage = new QWidget;
+    auto* aiLayout = new QVBoxLayout(aiPage);
+    aiLayout->setContentsMargins(0, 0, 0, 0);
+    aiLayout->setSpacing(8);
+
+    auto* mcpGroup = new QGroupBox("MCP Server");
+    auto* mcpLayout = new QVBoxLayout(mcpGroup);
+    mcpLayout->setSpacing(4);
+
+    m_autoMcpCheck = new QCheckBox("Auto-start MCP server");
+    m_autoMcpCheck->setChecked(current.autoStartMcp);
+    m_autoMcpCheck->setStyleSheet(QStringLiteral(
+        "QCheckBox { font-weight: bold; }"));
+    mcpLayout->addWidget(m_autoMcpCheck);
+
+    auto* mcpDesc = new QLabel(
+        "Automatically start the MCP bridge server when the application launches, "
+        "allowing external AI tools to connect and interact with the editor.");
+    mcpDesc->setWordWrap(true);
+    mcpDesc->setContentsMargins(20, 0, 0, 0);
+    mcpLayout->addWidget(mcpDesc);
+
+    aiLayout->addWidget(mcpGroup);
+    aiLayout->addStretch();
+
+    m_pages->addWidget(aiPage);                          // index 1
+    m_pageKeywords[aiItem] = collectPageKeywords(aiPage);
+
+    middleLayout->addWidget(m_pages, 1);
+
+    mainLayout->addLayout(middleLayout, 1);
+
+    // Tree <-> page connection
+    m_itemPageIndex[generalItem] = 0;
+    m_itemPageIndex[aiItem] = 1;
+    connect(m_tree, &QTreeWidget::currentItemChanged, this,
+            [this](QTreeWidgetItem* item, QTreeWidgetItem*) {
+        if (!item) return;
+        auto it = m_itemPageIndex.find(item);
+        if (it != m_itemPageIndex.end())
+            m_pages->setCurrentIndex(it.value());
+    });
+
+    // -- Button box --
+    auto* buttons = new QDialogButtonBox(QDialogButtonBox::Ok | QDialogButtonBox::Cancel);
+    connect(buttons, &QDialogButtonBox::accepted, this, &QDialog::accept);
+    connect(buttons, &QDialogButtonBox::rejected, this, &QDialog::reject);
+    mainLayout->addWidget(buttons);
+
+    // -- Styling --
+
+    // Combo boxes: set directly so the popup (top-level widget) inherits it
+    QString comboStyle = QStringLiteral(
+        "QComboBox {"
+        "  background: %1; color: %2; border: 1px solid %3;"
+        "  padding: 3px 8px; font-size: 12px;"
+        "}"
+        "QComboBox::drop-down {"
+        "  border: none; border-left: 1px solid %3;"
+        "  width: 20px;"
+        "}"
+        "QComboBox::down-arrow {"
+        "  image: url(:/vsicons/chevron-down.svg);"
+        "  width: 12px; height: 12px;"
+        "}"
+        "QComboBox QAbstractItemView {"
+        "  background: %1; color: %2; border: 1px solid %3;"
+        "  selection-background-color: %4;"
+        "}")
+        .arg(t.backgroundAlt.name(), t.text.name(),
+             t.border.name(), t.hover.name());
+    m_themeCombo->setStyleSheet(comboStyle);
+    m_fontCombo->setStyleSheet(comboStyle);
+
+    // Dialog-wide stylesheet for everything else
+    setStyleSheet(QStringLiteral(
+        "QDialog { background: %1; }"
+
+        "QLineEdit {"
+        "  background: %2; color: %3; border: 1px solid %4;"
+        "  padding: 4px 8px; font-size: 12px;"
+        "}"
+
+        "QTreeWidget {"
+        "  background: %2; color: %3; border: 1px solid %4;"
+        "  font-size: 12px; outline: none;"
+        "}"
+        "QTreeWidget::item { padding: 3px 0; outline: none; }"
+        "QTreeWidget::item:selected { background: %5; color: %3; }"
+        "QTreeWidget::item:hover { background: %6; }"
+
+        "QGroupBox {"
+        "  color: %3; border: 1px solid %4;"
+        "  margin-top: 8px; padding: 12px 8px 8px 8px;"
+        "  font-size: 12px; font-weight: bold;"
+        "}"
+        "QGroupBox::title {"
+        "  subcontrol-origin: margin;"
+        "  left: 8px; padding: 0 4px;"
+        "}"
+
+        "QLabel { color: %3; font-size: 12px; }"
+
+        "QCheckBox { color: %3; font-size: 12px; spacing: 6px; }"
+
+        "QPushButton {"
+        "  background: %2; color: %3; border: 1px solid %4;"
+        "  padding: 5px 16px; min-width: 70px; font-size: 12px;"
+        "  outline: none;"
+        "}"
+        "QPushButton:hover { background: %6; }"
+        "QPushButton:pressed { background: %1; }"
+        "QPushButton:focus { outline: none; }")
+        .arg(t.background.name(),    // %1
+             t.backgroundAlt.name(),  // %2
+             t.text.name(),           // %3
+             t.border.name(),         // %4
+             t.selection.name(),      // %5
+             t.hover.name()));        // %6
+
+    // Install hover shadow on interactive widgets (not buttons — they use stylesheet hover)
+    for (auto* w : {static_cast<QWidget*>(m_search),
+                    static_cast<QWidget*>(m_themeCombo),
+                    static_cast<QWidget*>(m_fontCombo),
+                    static_cast<QWidget*>(m_titleCaseCheck),
+                    static_cast<QWidget*>(m_safeModeCheck),
+                    static_cast<QWidget*>(m_autoMcpCheck)})
+        w->installEventFilter(this);
+
+    m_shadowColor = t.text;
+    m_shadowColor.setAlpha(80);
+}
+
+bool OptionsDialog::eventFilter(QObject* obj, QEvent* event) {
+    if (event->type() == QEvent::Enter) {
+        auto* w = qobject_cast<QWidget*>(obj);
+        if (w && !w->graphicsEffect()) {
+            auto* shadow = new QGraphicsDropShadowEffect(w);
+            shadow->setBlurRadius(12);
+            shadow->setOffset(0, 0);
+            shadow->setColor(m_shadowColor);
+            w->setGraphicsEffect(shadow);
+        }
+    } else if (event->type() == QEvent::Leave) {
+        auto* w = qobject_cast<QWidget*>(obj);
+        if (w)
+            w->setGraphicsEffect(nullptr);
+    }
+    return QDialog::eventFilter(obj, event);
+}
+
+OptionsResult OptionsDialog::result() const {
+    OptionsResult r;
+    r.themeIndex = m_themeCombo->currentIndex();
+    r.fontName = m_fontCombo->currentText();
+    r.menuBarTitleCase = m_titleCaseCheck->isChecked();
+    r.safeMode = m_safeModeCheck->isChecked();
+    r.autoStartMcp = m_autoMcpCheck->isChecked();
+    return r;
+}
+
+QStringList OptionsDialog::collectPageKeywords(QWidget* page) {
+    QStringList keywords;
+    for (auto* child : page->findChildren<QWidget*>()) {
+        if (auto* label = qobject_cast<QLabel*>(child))
+            keywords << label->text();
+        else if (auto* cb = qobject_cast<QCheckBox*>(child))
+            keywords << cb->text();
+        else if (auto* gb = qobject_cast<QGroupBox*>(child))
+            keywords << gb->title();
+        else if (auto* combo = qobject_cast<QComboBox*>(child)) {
+            for (int i = 0; i < combo->count(); ++i)
+                keywords << combo->itemText(i);
+        }
+    }
+    return keywords;
+}
+
+void OptionsDialog::filterTree(const QString& text) {
+    std::function<bool(QTreeWidgetItem*)> filter = [&](QTreeWidgetItem* item) -> bool {
+        bool anyChildVisible = false;
+        for (int i = 0; i < item->childCount(); ++i) {
+            if (filter(item->child(i)))
+                anyChildVisible = true;
+        }
+
+        bool selfMatch = item->text(0).contains(text, Qt::CaseInsensitive);
+        if (!selfMatch) {
+            for (const auto& kw : m_pageKeywords.value(item)) {
+                if (kw.contains(text, Qt::CaseInsensitive)) {
+                    selfMatch = true;
+                    break;
+                }
+            }
+        }
+        bool visible = selfMatch || anyChildVisible;
+        item->setHidden(!visible);
+
+        if (visible && item->childCount() > 0)
+            item->setExpanded(true);
+
+        return visible;
+    };
+
+    for (int i = 0; i < m_tree->topLevelItemCount(); ++i)
+        filter(m_tree->topLevelItem(i));
+}
+
+} // namespace rcx

src/optionsdialog.h

@@ -0,0 +1,53 @@
+#pragma once
+#include "themes/theme.h"
+#include <QDialog>
+#include <QLineEdit>
+#include <QTreeWidget>
+#include <QStackedWidget>
+#include <QComboBox>
+#include <QCheckBox>
+#include <QHash>
+#include <QColor>
+
+namespace rcx {
+
+struct OptionsResult {
+    int     themeIndex = 0;
+    QString fontName;
+    bool    menuBarTitleCase = true;
+    bool    safeMode = false;
+    bool    autoStartMcp = false;
+};
+
+class OptionsDialog : public QDialog {
+    Q_OBJECT
+public:
+    explicit OptionsDialog(const OptionsResult& current, QWidget* parent = nullptr);
+
+    OptionsResult result() const;
+
+protected:
+    bool eventFilter(QObject* obj, QEvent* event) override;
+
+private:
+    void filterTree(const QString& text);
+    static QStringList collectPageKeywords(QWidget* page);
+
+    QLineEdit*      m_search         = nullptr;
+    QTreeWidget*    m_tree           = nullptr;
+    QStackedWidget* m_pages          = nullptr;
+    QComboBox*      m_themeCombo     = nullptr;
+    QComboBox*      m_fontCombo      = nullptr;
+    QCheckBox*      m_titleCaseCheck = nullptr;
+    QCheckBox*      m_safeModeCheck  = nullptr;
+    QCheckBox*      m_autoMcpCheck   = nullptr;
+
+    QColor m_shadowColor;
+
+    // searchable keywords per leaf tree item
+    QHash<QTreeWidgetItem*, QStringList> m_pageKeywords;
+    // tree item → stacked widget page index
+    QHash<QTreeWidgetItem*, int> m_itemPageIndex;
+};
+
+} // namespace rcx

src/providers/snapshot_provider.h

@@ -1,28 +1,65 @@
 #pragma once
 #include "provider.h"
+#include <QHash>
 #include <memory>
 
 namespace rcx {
 
-// Provider that reads from a cached QByteArray snapshot but delegates
-// metadata (name, kind, getSymbol) to the underlying real provider.
-// Used for async refresh: worker thread reads bulk data into a snapshot,
-// UI thread composes against it without blocking.
+// Page-based snapshot provider.
+//
+// During async refresh the controller reads pages for the main struct and
+// every reachable pointer target.  Compose reads entirely from this page
+// table — no fallback to the real provider, no blocking I/O on the UI
+// thread.  Pages that were never fetched (truly invalid pointers) simply
+// read as zeros.
 class SnapshotProvider : public Provider {
     std::shared_ptr<Provider> m_real;
-    QByteArray m_data;
+    QHash<uint64_t, QByteArray> m_pages;   // page-aligned addr → 4096-byte page
+    int m_mainExtent = 0;                  // logical size of the main struct range
+
+    static constexpr uint64_t kPageSize = 4096;
+    static constexpr uint64_t kPageMask = ~(kPageSize - 1);
 
 public:
-    SnapshotProvider(std::shared_ptr<Provider> real, QByteArray snapshot)
-        : m_real(std::move(real)), m_data(std::move(snapshot)) {}
+    using PageMap = QHash<uint64_t, QByteArray>;
+
+    SnapshotProvider(std::shared_ptr<Provider> real, PageMap pages, int mainExtent)
+        : m_real(std::move(real))
+        , m_pages(std::move(pages))
+        , m_mainExtent(mainExtent) {}
 
     bool read(uint64_t addr, void* buf, int len) const override {
-        if (!isReadable(addr, len)) return false;
-        std::memcpy(buf, m_data.constData() + addr, len);
+        if (len <= 0) return false;
+        char* out = static_cast<char*>(buf);
+        uint64_t cur = addr;
+        int remaining = len;
+        while (remaining > 0) {
+            uint64_t pageAddr = cur & kPageMask;
+            int pageOff = static_cast<int>(cur - pageAddr);
+            int chunk = qMin(remaining, static_cast<int>(kPageSize - pageOff));
+            auto it = m_pages.constFind(pageAddr);
+            if (it != m_pages.constEnd()) {
+                std::memcpy(out, it->constData() + pageOff, chunk);
+            } else {
+                std::memset(out, 0, chunk);
+            }
+            out += chunk;
+            cur += chunk;
+            remaining -= chunk;
+        }
         return true;
     }
 
-    int size() const override { return m_data.size(); }
+    bool isReadable(uint64_t addr, int len) const override {
+        if (len <= 0) return (len == 0);
+        uint64_t end = addr + static_cast<uint64_t>(len);
+        for (uint64_t p = addr & kPageMask; p < end; p += kPageSize) {
+            if (!m_pages.contains(p)) return false;
+        }
+        return true;
+    }
+
+    int size() const override { return m_mainExtent; }
     bool isWritable() const override { return m_real ? m_real->isWritable() : false; }
     bool isLive() const override { return m_real ? m_real->isLive() : false; }
     QString name() const override { return m_real ? m_real->name() : QString(); }
@@ -34,21 +71,36 @@ public:
     bool write(uint64_t addr, const void* buf, int len) override {
         if (!m_real) return false;
         bool ok = m_real->write(addr, buf, len);
-        if (ok && isReadable(addr, len))
-            std::memcpy(m_data.data() + addr, buf, len);
+        if (ok) patchPages(addr, buf, len);
         return ok;
     }
 
-    // Update the entire snapshot (called after async read completes)
-    void updateSnapshot(QByteArray data) { m_data = std::move(data); }
-
-    // Patch specific bytes in the snapshot (called after user writes a value)
-    void patchSnapshot(uint64_t addr, const void* buf, int len) {
-        if (isReadable(addr, len))
-            std::memcpy(m_data.data() + addr, buf, len);
+    // Replace the entire page table (called after async read completes)
+    void updatePages(PageMap pages, int mainExtent) {
+        m_pages = std::move(pages);
+        m_mainExtent = mainExtent;
     }
 
-    const QByteArray& snapshot() const { return m_data; }
+    // Patch specific bytes in existing pages (called after user writes a value)
+    void patchPages(uint64_t addr, const void* buf, int len) {
+        const char* src = static_cast<const char*>(buf);
+        uint64_t cur = addr;
+        int remaining = len;
+        while (remaining > 0) {
+            uint64_t pageAddr = cur & kPageMask;
+            int pageOff = static_cast<int>(cur - pageAddr);
+            int chunk = qMin(remaining, static_cast<int>(kPageSize - pageOff));
+            auto it = m_pages.find(pageAddr);
+            if (it != m_pages.end()) {
+                std::memcpy(it->data() + pageOff, src, chunk);
+            }
+            src += chunk;
+            cur += chunk;
+            remaining -= chunk;
+        }
+    }
+
+    const PageMap& pages() const { return m_pages; }
 };
 
 } // namespace rcx

src/resources.qrc

@@ -3,6 +3,7 @@
         <file alias="chevron-right.png">icons/chevron-right.png</file>
         <file alias="chevron-down.png">icons/chevron-down.png</file>
         <file alias="class.png">icons/class.png</file>
+
     </qresource>
     <qresource prefix="/fonts">
         <file alias="JetBrainsMono.ttf">fonts/JetBrainsMono.ttf</file>
@@ -20,6 +21,9 @@
         <file alias="arrow-right.svg">vsicons/arrow-right.svg</file>
         <file alias="split-horizontal.svg">vsicons/split-horizontal.svg</file>
         <file alias="chrome-close.svg">vsicons/chrome-close.svg</file>
+        <file alias="chrome-minimize.svg">vsicons/chrome-minimize.svg</file>
+        <file alias="chrome-maximize.svg">vsicons/chrome-maximize.svg</file>
+        <file alias="chrome-restore.svg">vsicons/chrome-restore.svg</file>
         <file alias="text-size.svg">vsicons/text-size.svg</file>
         <file alias="add.svg">vsicons/add.svg</file>
         <file alias="remove.svg">vsicons/remove.svg</file>
@@ -43,5 +47,9 @@
         <file alias="selection.svg">vsicons/list-selection.svg</file>
         <file alias="symbol-numeric.svg">vsicons/symbol-numeric.svg</file>
         <file alias="symbol-ruler.svg">vsicons/symbol-ruler.svg</file>
+        <file alias="settings-gear.svg">vsicons/settings-gear.svg</file>
+        <file alias="chevron-down.svg">vsicons/chevron-down.svg</file>
+        <file alias="folder.svg">vsicons/folder.svg</file>
+        <file alias="symbol-enum.svg">vsicons/symbol-enum.svg</file>
     </qresource>
 </RCC>

src/themes/defaults/reclass_dark.json

@@ -0,0 +1,29 @@
+{
+    "name": "Reclass Dark",
+    "background": "#1e1e1e",
+    "backgroundAlt": "#252526",
+    "surface": "#2a2d2e",
+    "border": "#3c3c3c",
+    "borderFocused": "#888888",
+    "button": "#333333",
+    "text": "#d4d4d4",
+    "textDim": "#858585",
+    "textMuted": "#585858",
+    "textFaint": "#505050",
+    "hover": "#1e1e1e",
+    "selected": "#1e1e1e",
+    "selection": "#2b2b2b",
+    "syntaxKeyword": "#569cd6",
+    "syntaxNumber": "#b5cea8",
+    "syntaxString": "#ce9178",
+    "syntaxComment": "#6a9955",
+    "syntaxPreproc": "#c586c0",
+    "syntaxType": "#4EC9B0",
+    "indHoverSpan": "#E6B450",
+    "indCmdPill": "#2a2a2a",
+    "indDataChanged": "#8fbc7a",
+    "indHintGreen": "#5a8248",
+    "markerPtr": "#f44747",
+    "markerCycle": "#e5a00d",
+    "markerError": "#7a2e2e"
+}

src/themes/defaults/vs.json

@@ -0,0 +1,29 @@
+{
+    "name": "VS2022 Dark",
+    "background": "#1e1e1e",
+    "backgroundAlt": "#2d2d30",
+    "surface": "#333337",
+    "border": "#3f3f46",
+    "borderFocused": "#b180d7",
+    "button": "#3f3f46",
+    "text": "#dcdcdc",
+    "textDim": "#858585",
+    "textMuted": "#636369",
+    "textFaint": "#4d4d55",
+    "hover": "#2c2c2f",
+    "selected": "#262629",
+    "selection": "#264f78",
+    "syntaxKeyword": "#569cd6",
+    "syntaxNumber": "#b5cea8",
+    "syntaxString": "#d69d85",
+    "syntaxComment": "#57a64a",
+    "syntaxPreproc": "#9b9b9b",
+    "syntaxType": "#4ec9b0",
+    "indHoverSpan": "#b180d7",
+    "indCmdPill": "#2d2d30",
+    "indDataChanged": "#8fbc7a",
+    "indHintGreen": "#5a8248",
+    "markerPtr": "#f44747",
+    "markerCycle": "#e5a00d",
+    "markerError": "#7a2e2e"
+}

src/themes/defaults/warm.json

@@ -0,0 +1,29 @@
+{
+    "name": "Warm",
+    "background": "#212121",
+    "backgroundAlt": "#2a2a2a",
+    "surface": "#2a2a2a",
+    "border": "#373737",
+    "borderFocused": "#888888",
+    "button": "#373737",
+    "text": "#AAA99F",
+    "textDim": "#7a7a6e",
+    "textMuted": "#555550",
+    "textFaint": "#464646",
+    "hover": "#282828",
+    "selected": "#262626",
+    "selection": "#21213A",
+    "syntaxKeyword": "#AA9565",
+    "syntaxNumber": "#AAA98C",
+    "syntaxString": "#6B3B21",
+    "syntaxComment": "#464646",
+    "syntaxPreproc": "#AA9565",
+    "syntaxType": "#6B959F",
+    "indHoverSpan": "#AA9565",
+    "indCmdPill": "#2a2a2a",
+    "indDataChanged": "#6B959F",
+    "indHintGreen": "#464646",
+    "markerPtr": "#6B3B21",
+    "markerCycle": "#AA9565",
+    "markerError": "#3C2121"
+}

src/themes/theme.cpp

@@ -1,119 +1,56 @@
 #include "theme.h"
+#include <type_traits>
 
 namespace rcx {
 
-// ── Field table for DRY serialization ──
+// ── Shared field metadata (serialization + editor UI) ──
 
-struct ColorField { const char* key; QColor Theme::*ptr; };
-
-static const ColorField kFields[] = {
-    {"background",    &Theme::background},
-    {"backgroundAlt", &Theme::backgroundAlt},
-    {"surface",       &Theme::surface},
-    {"border",        &Theme::border},
-    {"button",        &Theme::button},
-    {"text",          &Theme::text},
-    {"textDim",       &Theme::textDim},
-    {"textMuted",     &Theme::textMuted},
-    {"textFaint",     &Theme::textFaint},
-    {"hover",         &Theme::hover},
-    {"selected",      &Theme::selected},
-    {"selection",     &Theme::selection},
-    {"syntaxKeyword", &Theme::syntaxKeyword},
-    {"syntaxNumber",  &Theme::syntaxNumber},
-    {"syntaxString",  &Theme::syntaxString},
-    {"syntaxComment", &Theme::syntaxComment},
-    {"syntaxPreproc", &Theme::syntaxPreproc},
-    {"syntaxType",    &Theme::syntaxType},
-    {"indHoverSpan",  &Theme::indHoverSpan},
-    {"indCmdPill",    &Theme::indCmdPill},
-    {"indDataChanged",&Theme::indDataChanged},
-    {"indHintGreen",  &Theme::indHintGreen},
-    {"markerPtr",     &Theme::markerPtr},
-    {"markerCycle",   &Theme::markerCycle},
-    {"markerError",   &Theme::markerError},
+const ThemeFieldMeta kThemeFields[] = {
+    {"background",    "Background",     "Chrome",      &Theme::background},
+    {"backgroundAlt", "Background Alt", "Chrome",      &Theme::backgroundAlt},
+    {"surface",       "Surface",        "Chrome",      &Theme::surface},
+    {"border",        "Border",         "Chrome",      &Theme::border},
+    {"borderFocused", "Border Focused", "Chrome",      &Theme::borderFocused},
+    {"button",        "Button",         "Chrome",      &Theme::button},
+    {"text",          "Text",           "Text",        &Theme::text},
+    {"textDim",       "Text Dim",       "Text",        &Theme::textDim},
+    {"textMuted",     "Text Muted",     "Text",        &Theme::textMuted},
+    {"textFaint",     "Text Faint",     "Text",        &Theme::textFaint},
+    {"hover",         "Hover",          "Interactive",  &Theme::hover},
+    {"selected",      "Selected",       "Interactive",  &Theme::selected},
+    {"selection",     "Selection",      "Interactive",  &Theme::selection},
+    {"syntaxKeyword", "Keyword",        "Syntax",      &Theme::syntaxKeyword},
+    {"syntaxNumber",  "Number",         "Syntax",      &Theme::syntaxNumber},
+    {"syntaxString",  "String",         "Syntax",      &Theme::syntaxString},
+    {"syntaxComment", "Comment",        "Syntax",      &Theme::syntaxComment},
+    {"syntaxPreproc", "Preprocessor",   "Syntax",      &Theme::syntaxPreproc},
+    {"syntaxType",    "Type",           "Syntax",      &Theme::syntaxType},
+    {"indHoverSpan",  "Hover Span",     "Indicators",  &Theme::indHoverSpan},
+    {"indCmdPill",    "Cmd Pill",       "Indicators",  &Theme::indCmdPill},
+    {"indDataChanged","Data Changed",   "Indicators",  &Theme::indDataChanged},
+    {"indHintGreen",  "Hint Green",     "Indicators",  &Theme::indHintGreen},
+    {"markerPtr",     "Pointer",        "Markers",     &Theme::markerPtr},
+    {"markerCycle",   "Cycle",          "Markers",     &Theme::markerCycle},
+    {"markerError",   "Error",          "Markers",     &Theme::markerError},
 };
+const int kThemeFieldCount = static_cast<int>(std::extent_v<decltype(kThemeFields)>);
 
 QJsonObject Theme::toJson() const {
     QJsonObject o;
     o["name"] = name;
-    for (const auto& f : kFields)
-        o[f.key] = (this->*f.ptr).name();
+    for (int i = 0; i < kThemeFieldCount; i++)
+        o[kThemeFields[i].key] = (this->*kThemeFields[i].ptr).name();
     return o;
 }
 
 Theme Theme::fromJson(const QJsonObject& o) {
-    Theme t = reclassDark();
-    t.name = o["name"].toString(t.name);
-    for (const auto& f : kFields) {
-        if (o.contains(f.key))
-            t.*f.ptr = QColor(o[f.key].toString());
+    Theme t;
+    t.name = o["name"].toString("Untitled");
+    for (int i = 0; i < kThemeFieldCount; i++) {
+        if (o.contains(kThemeFields[i].key))
+            t.*kThemeFields[i].ptr = QColor(o[kThemeFields[i].key].toString());
     }
     return t;
 }
 
-// ── Built-in themes ──
-
-Theme Theme::reclassDark() {
-    Theme t;
-    t.name          = "Reclass Dark";
-    t.background    = QColor("#1e1e1e");
-    t.backgroundAlt = QColor("#252526");
-    t.surface       = QColor("#2a2d2e");
-    t.border        = QColor("#3c3c3c");
-    t.button        = QColor("#333333");
-    t.text          = QColor("#d4d4d4");
-    t.textDim       = QColor("#858585");
-    t.textMuted     = QColor("#585858");
-    t.textFaint     = QColor("#505050");
-    t.hover         = QColor("#2b2b2b");
-    t.selected      = QColor("#232323");
-    t.selection     = QColor("#2b2b2b");
-    t.syntaxKeyword = QColor("#569cd6");
-    t.syntaxNumber  = QColor("#b5cea8");
-    t.syntaxString  = QColor("#ce9178");
-    t.syntaxComment = QColor("#6a9955");
-    t.syntaxPreproc = QColor("#c586c0");
-    t.syntaxType    = QColor("#4EC9B0");
-    t.indHoverSpan  = QColor("#E6B450");
-    t.indCmdPill    = QColor("#2a2a2a");
-    t.indDataChanged= QColor("#8fbc7a");
-    t.indHintGreen  = QColor("#5a8248");
-    t.markerPtr     = QColor("#f44747");
-    t.markerCycle   = QColor("#e5a00d");
-    t.markerError   = QColor("#7a2e2e");
-    return t;
-}
-
-Theme Theme::warm() {
-    Theme t;
-    t.name          = "Warm";
-    t.background    = QColor("#212121");
-    t.backgroundAlt = QColor("#2a2a2a");
-    t.surface       = QColor("#2a2a2a");
-    t.border        = QColor("#373737");
-    t.button        = QColor("#373737");
-    t.text          = QColor("#AAA99F");
-    t.textDim       = QColor("#7a7a6e");
-    t.textMuted     = QColor("#555550");
-    t.textFaint     = QColor("#464646");
-    t.hover         = QColor("#373737");
-    t.selected      = QColor("#2d2d2d");
-    t.selection     = QColor("#21213A");
-    t.syntaxKeyword = QColor("#AA9565");
-    t.syntaxNumber  = QColor("#AAA98C");
-    t.syntaxString  = QColor("#6B3B21");
-    t.syntaxComment = QColor("#464646");
-    t.syntaxPreproc = QColor("#AA9565");
-    t.syntaxType    = QColor("#6B959F");
-    t.indHoverSpan  = QColor("#AA9565");
-    t.indCmdPill    = QColor("#2a2a2a");
-    t.indDataChanged= QColor("#6B959F");
-    t.indHintGreen  = QColor("#464646");
-    t.markerPtr     = QColor("#6B3B21");
-    t.markerCycle   = QColor("#AA9565");
-    t.markerError   = QColor("#3C2121");
-    return t;
-}
-
 } // namespace rcx

src/themes/theme.h

@@ -13,6 +13,7 @@ struct Theme {
     QColor backgroundAlt;   // panels, tab selected, tooltips
     QColor surface;         // alternateBase
     QColor border;          // separators, menu borders
+    QColor borderFocused;   // window border when focused
     QColor button;          // button bg
 
     // ── Text ──
@@ -47,9 +48,18 @@ struct Theme {
 
     QJsonObject toJson() const;
     static Theme fromJson(const QJsonObject& obj);
-
-    static Theme reclassDark();
-    static Theme warm();
 };
 
+// ── Shared field metadata (serialization + editor UI) ──
+
+struct ThemeFieldMeta {
+    const char*    key;     // JSON key
+    const char*    label;   // display label
+    const char*    group;   // section group name
+    QColor Theme::*ptr;
+};
+
+extern const ThemeFieldMeta kThemeFields[];
+extern const int kThemeFieldCount;
+
 } // namespace rcx

src/themes/themeeditor.cpp

@@ -6,6 +6,7 @@
 #include <QDialogButtonBox>
 #include <QColorDialog>
 #include <QComboBox>
+#include <cstring>
 
 namespace rcx {
 
@@ -70,7 +71,7 @@ ThemeEditor::ThemeEditor(int themeIndex, QWidget* parent)
         : QStringLiteral("File: %1").arg(path));
     mainLayout->addWidget(m_fileInfoLabel);
 
-    // ── Scrollable area for swatches + contrast ──
+    // ── Scrollable area for swatches ──
     auto* scroll = new QScrollArea;
     scroll->setWidgetResizable(true);
     scroll->setFrameShape(QFrame::NoFrame);
@@ -79,83 +80,49 @@ ThemeEditor::ThemeEditor(int themeIndex, QWidget* parent)
     scrollLayout->setContentsMargins(0, 0, 6, 0);  // right margin for scrollbar
     scrollLayout->setSpacing(2);
 
-    // ── Color swatches ──
-    struct FieldDef { const char* label; QColor Theme::*ptr; };
+    // ── Color swatches (driven by kThemeFields) ──
+    const char* currentGroup = nullptr;
+    for (int fi = 0; fi < kThemeFieldCount; fi++) {
+        const auto& f = kThemeFields[fi];
 
-    auto addGroup = [&](const QString& title, std::initializer_list<FieldDef> fields) {
-        scrollLayout->addWidget(makeSectionLabel(title));
-        for (const auto& f : fields) {
-            int idx = m_swatches.size();
-
-            auto* row = new QHBoxLayout;
-            row->setSpacing(6);
-            row->setContentsMargins(8, 1, 0, 1);
-
-            auto* lbl = new QLabel(QString::fromLatin1(f.label));
-            lbl->setFixedWidth(120);
-            row->addWidget(lbl);
-
-            auto* swatchBtn = new QPushButton;
-            swatchBtn->setFixedSize(32, 18);
-            swatchBtn->setCursor(Qt::PointingHandCursor);
-            connect(swatchBtn, &QPushButton::clicked, this, [this, idx]() { pickColor(idx); });
-            row->addWidget(swatchBtn);
-
-            auto* hexLbl = new QLabel;
-            hexLbl->setFixedWidth(60);
-            hexLbl->setStyleSheet(QStringLiteral("color: #aaa; font-size: 10px;"));
-            row->addWidget(hexLbl);
-
-            row->addStretch();
-
-            SwatchEntry se;
-            se.label = f.label;
-            se.field = f.ptr;
-            se.swatchBtn = swatchBtn;
-            se.hexLabel = hexLbl;
-            m_swatches.append(se);
-
-            scrollLayout->addLayout(row);
+        // Section header on group change
+        if (!currentGroup || std::strcmp(currentGroup, f.group) != 0) {
+            scrollLayout->addWidget(makeSectionLabel(QString::fromLatin1(f.group)));
+            currentGroup = f.group;
         }
-    };
 
-    addGroup("Chrome", {
-        {"Background",     &Theme::background},
-        {"Background Alt", &Theme::backgroundAlt},
-        {"Surface",        &Theme::surface},
-        {"Border",         &Theme::border},
-        {"Button",         &Theme::button},
-    });
-    addGroup("Text", {
-        {"Text",        &Theme::text},
-        {"Text Dim",    &Theme::textDim},
-        {"Text Muted",  &Theme::textMuted},
-        {"Text Faint",  &Theme::textFaint},
-    });
-    addGroup("Interactive", {
-        {"Hover",       &Theme::hover},
-        {"Selected",    &Theme::selected},
-        {"Selection",   &Theme::selection},
-    });
-    addGroup("Syntax", {
-        {"Keyword",      &Theme::syntaxKeyword},
-        {"Number",       &Theme::syntaxNumber},
-        {"String",       &Theme::syntaxString},
-        {"Comment",      &Theme::syntaxComment},
-        {"Preprocessor", &Theme::syntaxPreproc},
-        {"Type",         &Theme::syntaxType},
-    });
-    addGroup("Indicators", {
-        {"Hover Span",    &Theme::indHoverSpan},
-        {"Cmd Pill",      &Theme::indCmdPill},
-        {"Data Changed",  &Theme::indDataChanged},
-        {"Hint Green",    &Theme::indHintGreen},
-    });
-    addGroup("Markers", {
-        {"Pointer",  &Theme::markerPtr},
-        {"Cycle",    &Theme::markerCycle},
-        {"Error",    &Theme::markerError},
-    });
+        int idx = m_swatches.size();
+
+        auto* row = new QHBoxLayout;
+        row->setSpacing(6);
+        row->setContentsMargins(8, 1, 0, 1);
+
+        auto* lbl = new QLabel(QString::fromLatin1(f.label));
+        lbl->setFixedWidth(120);
+        row->addWidget(lbl);
+
+        auto* swatchBtn = new QPushButton;
+        swatchBtn->setFixedSize(32, 18);
+        swatchBtn->setCursor(Qt::PointingHandCursor);
+        connect(swatchBtn, &QPushButton::clicked, this, [this, idx]() { pickColor(idx); });
+        row->addWidget(swatchBtn);
+
+        auto* hexLbl = new QLabel;
+        hexLbl->setFixedWidth(60);
+        hexLbl->setStyleSheet(QStringLiteral("color: #aaa; font-size: 10px;"));
+        row->addWidget(hexLbl);
+
+        row->addStretch();
+
+        SwatchEntry se;
+        se.label = f.label;
+        se.field = f.ptr;
+        se.swatchBtn = swatchBtn;
+        se.hexLabel = hexLbl;
+        m_swatches.append(se);
+
+        scrollLayout->addLayout(row);
+    }
 
     scrollLayout->addStretch();
     scroll->setWidget(scrollWidget);
@@ -163,28 +130,21 @@ ThemeEditor::ThemeEditor(int themeIndex, QWidget* parent)
 
     // ── Bottom bar ──
     auto* bottomRow = new QHBoxLayout;
-    m_previewBtn = new QPushButton(QStringLiteral("Live Preview"));
-    m_previewBtn->setCheckable(true);
-    connect(m_previewBtn, &QPushButton::toggled, this, [this](bool) { togglePreview(); });
-    bottomRow->addWidget(m_previewBtn);
-
     bottomRow->addStretch();
 
     auto* buttons = new QDialogButtonBox(QDialogButtonBox::Ok | QDialogButtonBox::Cancel);
     connect(buttons, &QDialogButtonBox::accepted, this, &QDialog::accept);
     connect(buttons, &QDialogButtonBox::rejected, this, [this]() {
-        if (m_previewing) {
-            ThemeManager::instance().revertPreview();
-            m_previewing = false;
-        }
+        ThemeManager::instance().revertPreview();
         reject();
     });
     bottomRow->addWidget(buttons);
     mainLayout->addLayout(bottomRow);
 
-    // Initial update
+    // Initial swatch update + start live preview
     for (int i = 0; i < m_swatches.size(); i++)
         updateSwatch(i);
+    tm.previewTheme(m_theme);
 }
 
 // ── Load a different theme into the editor ──
@@ -206,8 +166,7 @@ void ThemeEditor::loadTheme(int index) {
     for (int i = 0; i < m_swatches.size(); i++)
         updateSwatch(i);
 
-    if (m_previewing)
-        tm.previewTheme(m_theme);
+    tm.previewTheme(m_theme);
 }
 
 // ── Swatch update ──
@@ -230,19 +189,8 @@ void ThemeEditor::pickColor(int idx) {
     if (c.isValid()) {
         m_theme.*s.field = c;
         updateSwatch(idx);
-            if (m_previewing)
-            ThemeManager::instance().previewTheme(m_theme);
+        ThemeManager::instance().previewTheme(m_theme);
     }
 }
 
-// ── Live preview toggle ──
-
-void ThemeEditor::togglePreview() {
-    m_previewing = m_previewBtn->isChecked();
-    if (m_previewing)
-        ThemeManager::instance().previewTheme(m_theme);
-    else
-        ThemeManager::instance().revertPreview();
-}
-
 } // namespace rcx

src/themes/themeeditor.h

@@ -36,14 +36,10 @@ private:
     QComboBox*   m_themeCombo   = nullptr;
     QLineEdit*   m_nameEdit     = nullptr;
     QLabel*      m_fileInfoLabel = nullptr;
-    QPushButton* m_previewBtn   = nullptr;
-    bool         m_previewing   = false;
 
     void loadTheme(int index);
-    void rebuildSwatches(QVBoxLayout* swatchLayout);
     void updateSwatch(int idx);
     void pickColor(int idx);
-    void togglePreview();
 };
 
 } // namespace rcx

src/themes/thememanager.cpp

@@ -4,6 +4,7 @@
 #include <QFile>
 #include <QJsonDocument>
 #include <QStandardPaths>
+#include <QCoreApplication>
 
 namespace rcx {
 
@@ -13,18 +14,40 @@ ThemeManager& ThemeManager::instance() {
 }
 
 ThemeManager::ThemeManager() {
-    m_builtIn.append(Theme::reclassDark());
-    m_builtIn.append(Theme::warm());
+    loadBuiltInThemes();
     loadUserThemes();
 
     QSettings settings("Reclass", "Reclass");
-    QString saved = settings.value("theme", m_builtIn[0].name).toString();
+    QString fallback = m_builtIn.isEmpty() ? QString() : m_builtIn[0].name;
+    QString saved = settings.value("theme", fallback).toString();
     auto all = themes();
     for (int i = 0; i < all.size(); i++) {
         if (all[i].name == saved) { m_currentIdx = i; break; }
     }
 }
 
+// ── Load built-in themes from JSON files next to the executable ──
+
+QString ThemeManager::builtInDir() const {
+    return QCoreApplication::applicationDirPath() + "/themes";
+}
+
+void ThemeManager::loadBuiltInThemes() {
+    m_builtIn.clear();
+    QDir dir(builtInDir());
+    if (!dir.exists()) return;
+    for (const QString& name : dir.entryList({"*.json"}, QDir::Files, QDir::Name)) {
+        QFile f(dir.filePath(name));
+        if (!f.open(QIODevice::ReadOnly)) continue;
+        QJsonDocument jdoc = QJsonDocument::fromJson(f.readAll());
+        if (jdoc.isObject())
+            m_builtIn.append(Theme::fromJson(jdoc.object()));
+    }
+    m_builtInDefaults = m_builtIn;
+}
+
+// ── themes / current ──
+
 QVector<Theme> ThemeManager::themes() const {
     QVector<Theme> all = m_builtIn;
     all.append(m_user);
@@ -37,7 +60,10 @@ const Theme& ThemeManager::current() const {
     int userIdx = m_currentIdx - m_builtIn.size();
     if (userIdx >= 0 && userIdx < m_user.size())
         return m_user[userIdx];
-    return m_builtIn[0];
+    if (!m_builtIn.isEmpty())
+        return m_builtIn[0];
+    static const Theme empty;
+    return empty;
 }
 
 void ThemeManager::setCurrent(int index) {
@@ -55,17 +81,20 @@ void ThemeManager::addTheme(const Theme& theme) {
 }
 
 void ThemeManager::updateTheme(int index, const Theme& theme) {
+    m_previewing = false;  // commit any active preview
+
     if (index < builtInCount()) {
-        // Can't overwrite built-in; save as user theme instead
-        m_user.append(theme);
+        m_builtIn[index] = theme;
+        m_currentIdx = index;
     } else {
         int ui = index - builtInCount();
         if (ui >= 0 && ui < m_user.size())
             m_user[ui] = theme;
     }
     saveUserThemes();
-    if (index == m_currentIdx)
-        emit themeChanged(current());
+    QSettings settings("Reclass", "Reclass");
+    settings.setValue("theme", current().name);
+    emit themeChanged(current());
 }
 
 void ThemeManager::removeTheme(int index) {
@@ -82,7 +111,9 @@ void ThemeManager::removeTheme(int index) {
     saveUserThemes();
 }
 
-QString ThemeManager::themesDir() const {
+// ── User theme persistence ──
+
+QString ThemeManager::userDir() const {
     QString dir = QStandardPaths::writableLocation(QStandardPaths::AppDataLocation)
                   + "/themes";
     QDir().mkpath(dir);
@@ -91,37 +122,69 @@ QString ThemeManager::themesDir() const {
 
 void ThemeManager::loadUserThemes() {
     m_user.clear();
-    QDir dir(themesDir());
+    QDir dir(userDir());
     for (const QString& name : dir.entryList({"*.json"}, QDir::Files)) {
         QFile f(dir.filePath(name));
         if (!f.open(QIODevice::ReadOnly)) continue;
         QJsonDocument jdoc = QJsonDocument::fromJson(f.readAll());
-        if (jdoc.isObject())
-            m_user.append(Theme::fromJson(jdoc.object()));
+        if (!jdoc.isObject()) continue;
+        Theme t = Theme::fromJson(jdoc.object());
+
+        // If this overrides a built-in (same name), replace it in-place
+        bool isOverride = false;
+        for (int i = 0; i < m_builtIn.size(); i++) {
+            if (m_builtIn[i].name == t.name) {
+                m_builtIn[i] = t;
+                isOverride = true;
+                break;
+            }
+        }
+        if (!isOverride)
+            m_user.append(t);
     }
 }
 
 void ThemeManager::saveUserThemes() const {
-    QString dir = themesDir();
-    // Remove old files
+    QString dir = userDir();
     QDir d(dir);
     for (const QString& name : d.entryList({"*.json"}, QDir::Files))
         d.remove(name);
-    // Write current user themes
+
+    // Save modified built-ins (compare against on-disk originals)
+    for (int i = 0; i < m_builtIn.size() && i < m_builtInDefaults.size(); i++) {
+        if (m_builtIn[i].toJson() != m_builtInDefaults[i].toJson()) {
+            QString filename = m_builtIn[i].name.toLower().replace(' ', '_') + ".json";
+            QFile f(dir + "/" + filename);
+            if (f.open(QIODevice::WriteOnly))
+                f.write(QJsonDocument(m_builtIn[i].toJson()).toJson(QJsonDocument::Indented));
+        }
+    }
+
+    // Save user themes
     for (int i = 0; i < m_user.size(); i++) {
         QString filename = m_user[i].name.toLower().replace(' ', '_') + ".json";
         QFile f(dir + "/" + filename);
-        if (!f.open(QIODevice::WriteOnly)) continue;
-        f.write(QJsonDocument(m_user[i].toJson()).toJson(QJsonDocument::Indented));
+        if (f.open(QIODevice::WriteOnly))
+            f.write(QJsonDocument(m_user[i].toJson()).toJson(QJsonDocument::Indented));
     }
 }
 
 QString ThemeManager::themeFilePath(int index) const {
-    if (index < builtInCount()) return {};
+    if (index < builtInCount()) {
+        // Built-in has a user override file only if modified
+        if (index < m_builtInDefaults.size()
+            && m_builtIn[index].toJson() != m_builtInDefaults[index].toJson()) {
+            QString filename = m_builtIn[index].name.toLower().replace(' ', '_') + ".json";
+            return userDir() + "/" + filename;
+        }
+        // Show the built-in source file
+        QString filename = m_builtIn[index].name.toLower().replace(' ', '_') + ".json";
+        return builtInDir() + "/" + filename;
+    }
     int ui = index - builtInCount();
     if (ui < 0 || ui >= m_user.size()) return {};
     QString filename = m_user[ui].name.toLower().replace(' ', '_') + ".json";
-    return themesDir() + "/" + filename;
+    return userDir() + "/" + filename;
 }
 
 void ThemeManager::previewTheme(const Theme& theme) {

src/themes/thememanager.h

@@ -31,14 +31,17 @@ signals:
 
 private:
     ThemeManager();
-    QVector<Theme> m_builtIn;
+    QVector<Theme> m_builtIn;          // built-in themes (possibly overridden)
+    QVector<Theme> m_builtInDefaults;  // originals loaded from disk
     QVector<Theme> m_user;
     int m_currentIdx = 0;
 
     int builtInCount() const { return m_builtIn.size(); }
-    QString themesDir() const;
+    void loadBuiltInThemes();
+    QString builtInDir() const;
+    QString userDir() const;
     bool m_previewing = false;
-    Theme m_savedTheme;   // stashed current theme during preview
+    Theme m_savedTheme;
 };
 
 } // namespace rcx

src/titlebar.cpp

@@ -0,0 +1,186 @@
+#include "titlebar.h"
+#include "themes/thememanager.h"
+#include <QMouseEvent>
+#include <QPainter>
+#include <QStyle>
+#include <QWindow>
+
+namespace rcx {
+
+TitleBarWidget::TitleBarWidget(QWidget* parent)
+    : QWidget(parent)
+    , m_theme(ThemeManager::instance().current())
+{
+    setFixedHeight(32);
+
+    auto* layout = new QHBoxLayout(this);
+    layout->setContentsMargins(0, 0, 0, 0);
+    layout->setSpacing(0);
+
+    // App name
+    m_appLabel = new QLabel(QStringLiteral("Reclass"), this);
+    m_appLabel->setContentsMargins(10, 0, 4, 0);
+    m_appLabel->setAlignment(Qt::AlignVCenter);
+    m_appLabel->setAttribute(Qt::WA_TransparentForMouseEvents);
+    layout->addWidget(m_appLabel);
+
+    // Menu bar
+    m_menuBar = new QMenuBar(this);
+    m_menuBar->setNativeMenuBar(false);
+    m_menuBar->setSizePolicy(QSizePolicy::Minimum, QSizePolicy::Expanding);
+    layout->addWidget(m_menuBar);
+
+    layout->addStretch();
+
+    // Chrome buttons
+    m_btnMin   = makeChromeButton(":/vsicons/chrome-minimize.svg");
+    m_btnMax   = makeChromeButton(":/vsicons/chrome-maximize.svg");
+    m_btnClose = makeChromeButton(":/vsicons/chrome-close.svg");
+
+    layout->addWidget(m_btnMin);
+    layout->addWidget(m_btnMax);
+    layout->addWidget(m_btnClose);
+
+    connect(m_btnMin, &QToolButton::clicked, this, [this]() {
+        window()->showMinimized();
+    });
+    connect(m_btnMax, &QToolButton::clicked, this, [this]() {
+        toggleMaximize();
+    });
+    connect(m_btnClose, &QToolButton::clicked, this, [this]() {
+        window()->close();
+    });
+}
+
+QToolButton* TitleBarWidget::makeChromeButton(const QString& iconPath) {
+    auto* btn = new QToolButton(this);
+    btn->setIcon(QIcon(iconPath));
+    btn->setIconSize(QSize(16, 16));
+    btn->setFixedSize(46, 32);
+    btn->setAutoRaise(true);
+    btn->setFocusPolicy(Qt::NoFocus);
+    return btn;
+}
+
+void TitleBarWidget::applyTheme(const Theme& theme) {
+    m_theme = theme;
+
+    // Title bar background
+    setAutoFillBackground(true);
+    QPalette pal = palette();
+    pal.setColor(QPalette::Window, theme.background);
+    setPalette(pal);
+
+    // App label
+    m_appLabel->setStyleSheet(
+        QStringLiteral("QLabel { color: %1; font-size: 12px; font-weight: bold; }")
+            .arg(theme.textDim.name()));
+
+    // Menu bar styling — transparent background, themed text
+    m_menuBar->setStyleSheet(
+        QStringLiteral(
+            "QMenuBar { background: transparent; border: none; }"
+            "QMenuBar::item { background: transparent; color: %1; padding: 8px 8px 4px 8px; }"
+            "QMenuBar::item:selected { background: %2; }"
+            "QMenuBar::item:pressed { background: %2; }")
+            .arg(theme.textDim.name(), theme.hover.name()));
+
+    // Chrome buttons
+    QString btnStyle = QStringLiteral(
+        "QToolButton { background: transparent; border: none; }"
+        "QToolButton:hover { background: %1; }")
+        .arg(theme.hover.name());
+    m_btnMin->setStyleSheet(btnStyle);
+    m_btnMax->setStyleSheet(btnStyle);
+
+    // Close button: red hover
+    m_btnClose->setStyleSheet(QStringLiteral(
+        "QToolButton { background: transparent; border: none; }"
+        "QToolButton:hover { background: #c42b1c; }"));
+
+    update();
+}
+
+void TitleBarWidget::setShowIcon(bool show) {
+    if (show) {
+        m_appLabel->setText(QString());
+        m_appLabel->setPixmap(QIcon(":/icons/class.png").pixmap(24, 24));
+    } else {
+        m_appLabel->setPixmap(QPixmap());
+        m_appLabel->setText(QStringLiteral("Reclass"));
+        m_appLabel->setStyleSheet(
+            QStringLiteral("QLabel { color: %1; font-size: 12px; font-weight: bold; }")
+                .arg(m_theme.textDim.name()));
+    }
+}
+
+void TitleBarWidget::setMenuBarTitleCase(bool titleCase) {
+    m_titleCase = titleCase;
+    for (QAction* action : m_menuBar->actions()) {
+        QString text = action->text();
+        QString clean = text;
+        clean.remove('&');
+
+        if (titleCase) {
+            QString result;
+            bool capitalizeNext = true;
+            for (int i = 0; i < clean.length(); ++i) {
+                QChar ch = clean[i];
+                if (ch.isLetter()) {
+                    result += capitalizeNext ? ch.toUpper() : ch.toLower();
+                    capitalizeNext = false;
+                } else {
+                    result += ch;
+                    if (ch.isSpace()) capitalizeNext = true;
+                }
+            }
+            action->setText("&" + result);
+        } else {
+            action->setText("&" + clean.toUpper());
+        }
+    }
+}
+
+void TitleBarWidget::updateMaximizeIcon() {
+    if (window()->isMaximized())
+        m_btnMax->setIcon(QIcon(":/vsicons/chrome-restore.svg"));
+    else
+        m_btnMax->setIcon(QIcon(":/vsicons/chrome-maximize.svg"));
+}
+
+void TitleBarWidget::toggleMaximize() {
+    if (window()->isMaximized())
+        window()->showNormal();
+    else
+        window()->showMaximized();
+    updateMaximizeIcon();
+}
+
+void TitleBarWidget::mousePressEvent(QMouseEvent* event) {
+    if (event->button() == Qt::LeftButton) {
+        window()->windowHandle()->startSystemMove();
+        event->accept();
+    } else {
+        QWidget::mousePressEvent(event);
+    }
+}
+
+void TitleBarWidget::mouseDoubleClickEvent(QMouseEvent* event) {
+    if (event->button() == Qt::LeftButton) {
+        toggleMaximize();
+        event->accept();
+    } else {
+        QWidget::mouseDoubleClickEvent(event);
+    }
+}
+
+void TitleBarWidget::paintEvent(QPaintEvent* event) {
+    QWidget::paintEvent(event);
+
+    // 1px bottom border
+    QPainter p(this);
+    p.setPen(m_theme.border);
+    p.drawLine(0, height() - 1, width() - 1, height() - 1);
+}
+
+} // namespace rcx

src/titlebar.h

@@ -0,0 +1,43 @@
+#pragma once
+#include "themes/theme.h"
+#include <QWidget>
+#include <QMenuBar>
+#include <QToolButton>
+#include <QLabel>
+#include <QHBoxLayout>
+
+namespace rcx {
+
+class TitleBarWidget : public QWidget {
+    Q_OBJECT
+public:
+    explicit TitleBarWidget(QWidget* parent = nullptr);
+
+    QMenuBar* menuBar() const { return m_menuBar; }
+    void applyTheme(const Theme& theme);
+    void setShowIcon(bool show);
+    void setMenuBarTitleCase(bool titleCase);
+    bool menuBarTitleCase() const { return m_titleCase; }
+
+    void updateMaximizeIcon();
+
+protected:
+    void mousePressEvent(QMouseEvent* event) override;
+    void mouseDoubleClickEvent(QMouseEvent* event) override;
+    void paintEvent(QPaintEvent* event) override;
+
+private:
+    QLabel*      m_appLabel   = nullptr;
+    QMenuBar*    m_menuBar    = nullptr;
+    QToolButton* m_btnMin     = nullptr;
+    QToolButton* m_btnMax     = nullptr;
+    QToolButton* m_btnClose   = nullptr;
+
+    Theme m_theme;
+    bool  m_titleCase = true;
+
+    QToolButton* makeChromeButton(const QString& iconPath);
+    void toggleMaximize();
+};
+
+} // namespace rcx

src/typeselectorpopup.cpp

@@ -16,6 +16,7 @@
 #include <QApplication>
 #include <QScreen>
 #include <QIntValidator>
+#include <QElapsedTimer>
 #include "themes/thememanager.h"
 
 namespace rcx {
@@ -121,7 +122,7 @@ public:
             return;
         }
 
-        // 18px gutter: side triangle if current
+        // Gutter: side triangle if current
         if (m_hasCurrent && m_filtered && row >= 0 && row < m_filtered->size()) {
             const TypeEntry& entry = (*m_filtered)[row];
             bool isCurrent = false;
@@ -130,13 +131,13 @@ public:
             else if (m_current->entryKind == TypeEntry::Composite && entry.entryKind == TypeEntry::Composite)
                 isCurrent = (entry.structId == m_current->structId);
             if (isCurrent) {
-                painter->setPen(t.syntaxType);
+                painter->setPen(t.text);
                 painter->setFont(m_font);
-                painter->drawText(QRect(x, y, 18, h), Qt::AlignCenter,
+                painter->drawText(QRect(x, y, 10, h), Qt::AlignCenter,
                                   QString(QChar(0x25B8)));
             }
         }
-        x += 18;
+        x += 10;
 
         // Icon 16x16 — only for composite entries
         bool hasIcon = (m_filtered && row >= 0 && row < m_filtered->size()
@@ -368,6 +369,7 @@ TypeSelectorPopup::TypeSelectorPopup(QWidget* parent)
         m_listView->setFrameShape(QFrame::NoFrame);
         m_listView->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
         m_listView->setMouseTracking(true);
+        m_listView->setEditTriggers(QAbstractItemView::NoEditTriggers);
         m_listView->viewport()->setAttribute(Qt::WA_Hover, true);
         m_listView->installEventFilter(this);
 
@@ -384,10 +386,33 @@ TypeSelectorPopup::TypeSelectorPopup(QWidget* parent)
 }
 
 void TypeSelectorPopup::warmUp() {
+    // One-time per-process cost (~170ms): Qt lazily initializes the style/font/DLL
+    // subsystem the first time a popup with complex children is shown. Pre-pay it
+    // by briefly showing a throwaway dummy popup with a QListView, then show+hide
+    // ourselves.
+    {
+        auto* primer = new QFrame(nullptr, Qt::Popup | Qt::FramelessWindowHint);
+        primer->resize(300, 400);
+        auto* lay = new QVBoxLayout(primer);
+        lay->addWidget(new QLabel(QStringLiteral("x")));
+        lay->addWidget(new QLineEdit);
+        auto* model = new QStringListModel(primer);
+        QStringList items; for (int i = 0; i < 10; i++) items << QStringLiteral("x");
+        model->setStringList(items);
+        auto* lv = new QListView;
+        lv->setModel(model);
+        lay->addWidget(lv);
+        primer->show();
+        QApplication::processEvents();
+        primer->hide();
+        QApplication::processEvents();
+        delete primer;
+    }
+
     TypeEntry dummy;
     dummy.entryKind = TypeEntry::Primitive;
     dummy.primitiveKind = NodeKind::Hex8;
-    dummy.displayName = "warmup";
+    dummy.displayName = QStringLiteral("warmup");
     setTypes({dummy});
     popup(QPoint(-9999, -9999));
     hide();
@@ -467,7 +492,7 @@ void TypeSelectorPopup::popup(const QPoint& globalPos) {
         QString text = t.classKeyword.isEmpty()
             ? t.displayName
             : (t.classKeyword + QStringLiteral(" ") + t.displayName);
-        int w = 18 + 20 + fm.horizontalAdvance(text) + 16;
+        int w = 10 + 20 + fm.horizontalAdvance(text) + 16;
         if (w > maxTextW) maxTextW = w;
     }
     int popupW = qBound(280, maxTextW + 24, 500);

src/workspace_model.h

@@ -1,62 +1,76 @@
 #pragma once
 #include "core.h"
+#include <QIcon>
 #include <QStandardItemModel>
 #include <QStandardItem>
 #include <algorithm>
 
 namespace rcx {
 
-// Recursively add children of parentId as tree items under parentItem.
-inline void addWorkspaceChildren(QStandardItem* parentItem,
-                                 const NodeTree& tree,
-                                 uint64_t parentId,
-                                 void* subPtr) {
-    QVector<int> children = tree.childrenOf(parentId);
-    std::sort(children.begin(), children.end(), [&](int a, int b) {
-        return tree.nodes[a].offset < tree.nodes[b].offset;
-    });
+struct TabInfo {
+    const NodeTree* tree;
+    QString         name;
+    void*           subPtr;   // QMdiSubWindow* as void*
+};
 
-    for (int idx : children) {
-        const Node& node = tree.nodes[idx];
+// Sentinel value stored in UserRole+1 to mark the Project group node.
+static constexpr uint64_t kGroupSentinel = ~uint64_t(0);
 
-        // Skip hex preview nodes — they are padding/filler, not meaningful fields
-        if (isHexNode(node.kind)) continue;
-
-        QString display;
-        if (node.kind == NodeKind::Struct) {
-            QString typeName = node.structTypeName.isEmpty()
-                ? node.name : node.structTypeName;
-            display = QStringLiteral("%1 (%2)")
-                .arg(typeName, node.resolvedClassKeyword());
-        } else {
-            display = QStringLiteral("%1 (%2)")
-                .arg(node.name, QString::fromLatin1(kindToString(node.kind)));
-        }
-
-        auto* item = new QStandardItem(display);
-        item->setData(QVariant::fromValue(subPtr), Qt::UserRole);
-        if (node.kind == NodeKind::Struct)
-            item->setData(QVariant::fromValue(node.id), Qt::UserRole + 1);
-        item->setData(QVariant::fromValue(node.id), Qt::UserRole + 2);  // nodeId for scroll
-
-        if (node.kind == NodeKind::Struct)
-            addWorkspaceChildren(item, tree, node.id, subPtr);
-
-        parentItem->appendRow(item);
-    }
-}
-
-inline void buildWorkspaceModel(QStandardItemModel* model,
-                                const NodeTree& tree,
-                                const QString& projectName,
-                                void* subPtr = nullptr) {
+inline void buildProjectExplorer(QStandardItemModel* model,
+                                 const QVector<TabInfo>& tabs) {
     model->clear();
     model->setHorizontalHeaderLabels({QStringLiteral("Name")});
 
-    auto* projectItem = new QStandardItem(projectName);
-    projectItem->setData(QVariant::fromValue(subPtr), Qt::UserRole);
+    // Single "Project" root with folder icon
+    void* firstSub = tabs.isEmpty() ? nullptr : tabs[0].subPtr;
+    auto* projectItem = new QStandardItem(QIcon(":/vsicons/folder.svg"),
+                                          QStringLiteral("Project"));
+    projectItem->setData(QVariant::fromValue(firstSub), Qt::UserRole);
+    projectItem->setData(QVariant::fromValue(kGroupSentinel), Qt::UserRole + 1);
 
-    addWorkspaceChildren(projectItem, tree, 0, subPtr);
+    // Collect all top-level structs/enums across all tabs
+    QVector<std::pair<const Node*, void*>> types, enums;
+    for (const auto& tab : tabs) {
+        QVector<int> topLevel = tab.tree->childrenOf(0);
+        for (int idx : topLevel) {
+            const Node& n = tab.tree->nodes[idx];
+            if (n.kind != NodeKind::Struct) continue;
+            if (n.resolvedClassKeyword() == QStringLiteral("enum"))
+                enums.append({&n, tab.subPtr});
+            else
+                types.append({&n, tab.subPtr});
+        }
+    }
+
+    auto nameOf = [](const Node* n) {
+        return n->structTypeName.isEmpty() ? n->name : n->structTypeName;
+    };
+    auto cmpName = [&](const std::pair<const Node*, void*>& a,
+                       const std::pair<const Node*, void*>& b) {
+        return nameOf(a.first).compare(nameOf(b.first), Qt::CaseInsensitive) < 0;
+    };
+    std::sort(types.begin(), types.end(), cmpName);
+    std::sort(enums.begin(), enums.end(), cmpName);
+
+    for (const auto& [n, subPtr] : types) {
+        QString display = QStringLiteral("%1 (%2)")
+            .arg(nameOf(n), n->resolvedClassKeyword());
+        auto* item = new QStandardItem(
+            QIcon(":/vsicons/symbol-structure.svg"), display);
+        item->setData(QVariant::fromValue(subPtr), Qt::UserRole);
+        item->setData(QVariant::fromValue(n->id), Qt::UserRole + 1);
+        projectItem->appendRow(item);
+    }
+
+    for (const auto& [n, subPtr] : enums) {
+        QString display = QStringLiteral("%1 (%2)")
+            .arg(nameOf(n), n->resolvedClassKeyword());
+        auto* item = new QStandardItem(
+            QIcon(":/vsicons/symbol-enum.svg"), display);
+        item->setData(QVariant::fromValue(subPtr), Qt::UserRole);
+        item->setData(QVariant::fromValue(n->id), Qt::UserRole + 1);
+        projectItem->appendRow(item);
+    }
 
     model->appendRow(projectItem);
 }

tests/test_com_security.cpp

@@ -0,0 +1,185 @@
+/**
+ * test_com_security.cpp — DebugConnect transport diagnostic
+ *
+ * Tests EVERY transport to find what works from MinGW:
+ *   1. TCP to WinDbg .server (port 5055)
+ *   2. Named pipe to WinDbg .server
+ *   3. TCP with various COM security configs
+ *   4. DebugCreate local (baseline)
+ *
+ * SETUP: In WinDbg, run BOTH of these:
+ *   .server tcp:port=5055
+ *   .server npipe:pipe=reclass
+ *
+ * Then run this test.
+ */
+
+#include <cstdio>
+#include <cstdlib>
+#include <cstring>
+
+#ifdef _WIN32
+#include <windows.h>
+#include <objbase.h>
+#include <initguid.h>
+#include <dbgeng.h>
+#endif
+
+#ifdef _WIN32
+static void try_connect(const char* label, const char* connStr)
+{
+    printf("  %-40s → ", label);
+    fflush(stdout);
+
+    IDebugClient* client = nullptr;
+    HRESULT hr = DebugConnect(connStr, IID_IDebugClient, (void**)&client);
+
+    if (SUCCEEDED(hr) && client) {
+        printf("SUCCESS (hr=0x%08lX)\n", (unsigned long)hr);
+
+        // Try to get data spaces and read something
+        IDebugDataSpaces* ds = nullptr;
+        IDebugSymbols* sym = nullptr;
+        IDebugControl* ctrl = nullptr;
+        client->QueryInterface(IID_IDebugDataSpaces, (void**)&ds);
+        client->QueryInterface(IID_IDebugSymbols, (void**)&sym);
+        client->QueryInterface(IID_IDebugControl, (void**)&ctrl);
+
+        if (ctrl) {
+            HRESULT hrWait = ctrl->WaitForEvent(0, 5000);
+            printf("    WaitForEvent: hr=0x%08lX\n", (unsigned long)hrWait);
+        }
+
+        if (sym) {
+            ULONG numMods = 0, numUnloaded = 0;
+            sym->GetNumberModules(&numMods, &numUnloaded);
+            printf("    Modules: %lu loaded\n", numMods);
+
+            if (numMods > 0 && ds) {
+                ULONG64 base = 0;
+                sym->GetModuleByIndex(0, &base);
+                unsigned char buf[2] = {};
+                ULONG got = 0;
+                ds->ReadVirtual(base, buf, 2, &got);
+                printf("    Read at 0x%llX: got=%lu bytes=[%02X %02X]\n",
+                       (unsigned long long)base, got, buf[0], buf[1]);
+            }
+        }
+
+        if (sym) sym->Release();
+        if (ds) ds->Release();
+        if (ctrl) ctrl->Release();
+        client->Release();
+    } else {
+        char buf[256] = {};
+        FormatMessageA(FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
+                       nullptr, (DWORD)hr, 0, buf, sizeof(buf), nullptr);
+        for (char* p = buf + strlen(buf) - 1; p >= buf && (*p == '\r' || *p == '\n'); --p)
+            *p = '\0';
+        printf("FAIL hr=0x%08lX (%s)\n", (unsigned long)hr, buf);
+    }
+}
+#endif
+
+int main()
+{
+#ifdef _WIN32
+    char hostname[256] = {};
+    DWORD hsize = sizeof(hostname);
+    GetComputerNameA(hostname, &hsize);
+
+    printf("=== DebugConnect Transport Diagnostic ===\n");
+    printf("Machine: %s\n\n", hostname);
+
+    // ── Baseline: DebugCreate (local) ──
+    printf("[1] DebugCreate (local, no network)\n");
+    {
+        IDebugClient* client = nullptr;
+        HRESULT hr = DebugCreate(IID_IDebugClient, (void**)&client);
+        printf("  DebugCreate: %s (hr=0x%08lX)\n\n",
+               SUCCEEDED(hr) ? "OK" : "FAIL", (unsigned long)hr);
+        if (client) client->Release();
+    }
+
+    // ── TCP variants ──
+    printf("[2] TCP connections (need: .server tcp:port=5055)\n");
+    try_connect("tcp:Port=5055,Server=localhost",
+                "tcp:Port=5055,Server=localhost");
+    try_connect("tcp:Port=5055,Server=127.0.0.1",
+                "tcp:Port=5055,Server=127.0.0.1");
+    {
+        char conn[512];
+        snprintf(conn, sizeof(conn), "tcp:Port=5055,Server=%s", hostname);
+        try_connect(conn, conn);
+    }
+    printf("\n");
+
+    // ── Named pipe variants ──
+    printf("[3] Named pipe connections (need: .server npipe:pipe=reclass)\n");
+    try_connect("npipe:Pipe=reclass,Server=localhost",
+                "npipe:Pipe=reclass,Server=localhost");
+    {
+        char conn[512];
+        snprintf(conn, sizeof(conn), "npipe:Pipe=reclass,Server=%s", hostname);
+        try_connect(conn, conn);
+    }
+    try_connect("npipe:Pipe=reclass",
+                "npipe:Pipe=reclass");
+    printf("\n");
+
+    // ── TCP with COM security ──
+    printf("[4] TCP with explicit COM init (MTA + IMPERSONATE)\n");
+    {
+        // This runs in-process so CoInitialize affects subsequent calls
+        CoInitializeEx(nullptr, COINIT_MULTITHREADED);
+        CoInitializeSecurity(
+            nullptr, -1, nullptr, nullptr,
+            RPC_C_AUTHN_LEVEL_DEFAULT,
+            RPC_C_IMP_LEVEL_IMPERSONATE,
+            nullptr, EOAC_NONE, nullptr);
+        try_connect("tcp:Port=5055,Server=localhost (MTA+SEC)",
+                    "tcp:Port=5055,Server=localhost");
+        try_connect("npipe:Pipe=reclass (MTA+SEC)",
+                    "npipe:Pipe=reclass,Server=localhost");
+        CoUninitialize();
+    }
+    printf("\n");
+
+    // ── Check if dbgeng.dll is the system one ──
+    printf("[5] DbgEng DLL info\n");
+    {
+        HMODULE hmod = GetModuleHandleA("dbgeng.dll");
+        if (hmod) {
+            char path[MAX_PATH] = {};
+            GetModuleFileNameA(hmod, path, MAX_PATH);
+            printf("  dbgeng.dll loaded from: %s\n", path);
+
+            // Get version
+            DWORD verSize = GetFileVersionInfoSizeA(path, nullptr);
+            if (verSize > 0) {
+                auto* verData = (char*)malloc(verSize);
+                if (GetFileVersionInfoA(path, 0, verSize, verData)) {
+                    VS_FIXEDFILEINFO* fileInfo = nullptr;
+                    UINT len = 0;
+                    if (VerQueryValueA(verData, "\\", (void**)&fileInfo, &len)) {
+                        printf("  Version: %d.%d.%d.%d\n",
+                               HIWORD(fileInfo->dwFileVersionMS),
+                               LOWORD(fileInfo->dwFileVersionMS),
+                               HIWORD(fileInfo->dwFileVersionLS),
+                               LOWORD(fileInfo->dwFileVersionLS));
+                    }
+                }
+                free(verData);
+            }
+        } else {
+            printf("  dbgeng.dll not loaded yet\n");
+        }
+    }
+
+    printf("\n=== Done ===\n");
+    return 0;
+#else
+    printf("Windows only.\n");
+    return 0;
+#endif
+}

tests/test_compose.cpp

@@ -89,7 +89,7 @@ private slots:
         QCOMPARE(result.meta[2].lineKind, LineKind::Footer);
     }
 
-    void testPaddingMarker() {
+    void testHexNodeCompose() {
         NodeTree tree;
         tree.baseAddress = 0;
 
@@ -100,19 +100,18 @@ private slots:
         int ri = tree.addNode(root);
         uint64_t rootId = tree.nodes[ri].id;
 
-        Node pad;
-        pad.kind = NodeKind::Padding;
-        pad.name = "pad";
-        pad.parentId = rootId;
-        pad.offset = 0;
-        tree.addNode(pad);
+        Node hex;
+        hex.kind = NodeKind::Hex8;
+        hex.name = "pad";
+        hex.parentId = rootId;
+        hex.offset = 0;
+        tree.addNode(hex);
 
         NullProvider prov;
         ComposeResult result = compose(tree, prov);
 
-        // CommandRow + padding + root footer = 3
+        // CommandRow + hex node + root footer = 3
         QCOMPARE(result.meta.size(), 3);
-        QVERIFY(result.meta[1].markerMask & (1u << M_PAD));
         QCOMPARE(result.meta[1].depth, 1);
 
         // Line 2 is root footer

tests/test_controller.cpp

@@ -34,9 +34,8 @@ static void buildSmallTree(NodeTree& tree) {
     field(0,  NodeKind::UInt32,  "field_u32");    // 4 bytes
     field(4,  NodeKind::Float,   "field_float");   // 4 bytes
     field(8,  NodeKind::UInt8,   "field_u8");      // 1 byte
-    field(9,  NodeKind::Padding, "pad0");          // 3 bytes padding
-    // Set padding arrayLen = 3 for 3-byte padding
-    tree.nodes.last().arrayLen = 3;
+    field(9,  NodeKind::Hex16,   "pad0");           // 2 bytes
+    field(11, NodeKind::Hex8,    "pad1");           // 1 byte
     field(12, NodeKind::Hex32,   "field_hex");     // 4 bytes
 }
 
@@ -282,47 +281,6 @@ private slots:
         QVERIFY(newIdx >= 0);
     }
 
-    // ── Test: Padding value edit is effectively blocked at controller level ──
-    void testPaddingValueEditIsBlocked() {
-        // Find the padding node
-        int padIdx = -1;
-        for (int i = 0; i < m_doc->tree.nodes.size(); i++) {
-            if (m_doc->tree.nodes[i].kind == NodeKind::Padding) { padIdx = i; break; }
-        }
-        QVERIFY(padIdx >= 0);
-        uint64_t addr = m_doc->tree.computeOffset(padIdx);
-
-        // Read original data at padding offset
-        int padSize = m_doc->tree.nodes[padIdx].byteSize();
-        QByteArray origData = m_doc->provider->readBytes(addr, padSize);
-
-        // The context menu blocks Padding editing, so the controller's setNodeValue
-        // would only be called if the editing UI somehow allows it. But let's verify
-        // the editor correctly blocks it.
-        // Find padding line in composed output
-        ComposeResult result = m_doc->compose();
-        int paddingLine = -1;
-        for (int i = 0; i < result.meta.size(); i++) {
-            if (result.meta[i].nodeKind == NodeKind::Padding &&
-                result.meta[i].lineKind == LineKind::Field) {
-                paddingLine = i;
-                break;
-            }
-        }
-        QVERIFY(paddingLine >= 0);
-
-        m_editor->applyDocument(result);
-        QApplication::processEvents();
-
-        // beginInlineEdit(Value) on Padding line must be rejected
-        QVERIFY(!m_editor->beginInlineEdit(EditTarget::Value, paddingLine));
-        QVERIFY(!m_editor->isEditing());
-
-        // Data must be unchanged
-        QByteArray afterData = m_doc->provider->readBytes(addr, padSize);
-        QCOMPARE(afterData, origData);
-    }
-
     // ── Test: setNodeValue with Hex32 (space-separated hex bytes) ──
     void testSetNodeValueHex() {
         int idx = -1;

tests/test_dbgconnect.cpp

@@ -0,0 +1,65 @@
+#include <cstdio>
+#include <cstdint>
+#include <windows.h>
+#include <initguid.h>
+#include <dbgeng.h>
+
+int main()
+{
+    const char* connStr = "tcp:Port=5057,Server=localhost";
+    printf("Attempting DebugConnect(\"%s\")...\n", connStr);
+
+    IDebugClient* client = nullptr;
+    HRESULT hr = DebugConnect(connStr, IID_IDebugClient, (void**)&client);
+    printf("DebugConnect returned: 0x%08lX\n", hr);
+
+    if (SUCCEEDED(hr) && client) {
+        printf("Connected! Getting IDebugDataSpaces...\n");
+
+        IDebugDataSpaces* ds = nullptr;
+        hr = client->QueryInterface(IID_IDebugDataSpaces, (void**)&ds);
+        printf("QueryInterface(IDebugDataSpaces) = 0x%08lX\n", hr);
+
+        if (ds) {
+            IDebugControl* ctrl = nullptr;
+            client->QueryInterface(IID_IDebugControl, (void**)&ctrl);
+
+            if (ctrl) {
+                printf("Waiting for event...\n");
+                hr = ctrl->WaitForEvent(0, 5000);
+                printf("WaitForEvent = 0x%08lX\n", hr);
+                ctrl->Release();
+            }
+
+            // Try to read 2 bytes
+            IDebugSymbols* sym = nullptr;
+            client->QueryInterface(IID_IDebugSymbols, (void**)&sym);
+            if (sym) {
+                ULONG numMods = 0, numUnloaded = 0;
+                hr = sym->GetNumberModules(&numMods, &numUnloaded);
+                printf("GetNumberModules = 0x%08lX, numMods=%lu\n", hr, numMods);
+
+                if (numMods > 0) {
+                    ULONG64 base = 0;
+                    hr = sym->GetModuleByIndex(0, &base);
+                    printf("Module[0] base = 0x%llX (hr=0x%08lX)\n", base, hr);
+
+                    if (SUCCEEDED(hr) && base) {
+                        uint8_t buf[4] = {};
+                        ULONG got = 0;
+                        hr = ds->ReadVirtual(base, buf, 4, &got);
+                        printf("ReadVirtual(%llX, 4) = 0x%08lX, got=%lu, data=[%02X %02X %02X %02X]\n",
+                               base, hr, got, buf[0], buf[1], buf[2], buf[3]);
+                    }
+                }
+                sym->Release();
+            }
+            ds->Release();
+        }
+        client->Release();
+    } else {
+        printf("DebugConnect FAILED. hr=0x%08lX\n", hr);
+    }
+
+    return 0;
+}

tests/test_editor.cpp

@@ -170,9 +170,10 @@ static NodeTree makeTestTree() {
         n.parentId = rootId; n.offset = off;
         tree.addNode(n);
     };
-    auto pad = [&](int off, int len, const char* name) {
-        Node n; n.kind = NodeKind::Padding; n.name = name;
-        n.parentId = rootId; n.offset = off; n.arrayLen = len;
+    auto pad = [&](int off, int /*len*/, const char* name) {
+        // 4-byte padding → Hex32 (all usages in this test pass len=4)
+        Node n; n.kind = NodeKind::Hex32; n.name = name;
+        n.parentId = rootId; n.offset = off;
         tree.addNode(n);
     };
     auto arr = [&](int off, NodeKind ek, int len, const char* name) {
@@ -278,8 +279,8 @@ static NodeTree makeTestTree() {
 
         n.kind = NodeKind::UInt16;  n.name = "Length";         n.offset = 0; tree.addNode(n);
         n.kind = NodeKind::UInt16;  n.name = "MaximumLength";  n.offset = 2; tree.addNode(n);
-        n.kind = NodeKind::Padding; n.name = "Pad";
-        n.offset = 4; n.arrayLen = 4; tree.addNode(n);
+        n.kind = NodeKind::Hex32; n.name = "Pad";
+        n.offset = 4; n.arrayLen = 1; tree.addNode(n);
         n.kind = NodeKind::Pointer64; n.name = "Buffer"; n.offset = 8; n.arrayLen = 1;
         tree.addNode(n);
     }
@@ -751,70 +752,6 @@ private slots:
         m_editor->applyDocument(m_result);
     }
 
-    // ── Test: Padding line rejects value editing ──
-    void testPaddingLineRejectsValueEdit() {
-        m_editor->applyDocument(m_result);
-
-        // Find a Padding line in the composed output
-        int paddingLine = -1;
-        for (int i = 0; i < m_result.meta.size(); i++) {
-            if (m_result.meta[i].nodeKind == NodeKind::Padding &&
-                m_result.meta[i].lineKind == LineKind::Field) {
-                paddingLine = i;
-                break;
-            }
-        }
-        QVERIFY2(paddingLine >= 0, "Should have at least one Padding line in test tree");
-
-        const LineMeta* lm = m_editor->metaForLine(paddingLine);
-        QVERIFY(lm);
-        QCOMPARE(lm->nodeKind, NodeKind::Padding);
-
-        // Value edit on Padding MUST be rejected (the bug fix)
-        QVERIFY2(!m_editor->beginInlineEdit(EditTarget::Value, paddingLine),
-                 "Value edit should be rejected on Padding lines");
-        QVERIFY(!m_editor->isEditing());
-
-        // Name edit on Padding SHOULD succeed (ASCII preview column is editable)
-        bool ok = m_editor->beginInlineEdit(EditTarget::Name, paddingLine);
-        QVERIFY2(ok, "Name edit should be allowed on Padding lines (ASCII preview)");
-        QVERIFY(m_editor->isEditing());
-        m_editor->cancelInlineEdit();
-
-        // Type edit on Padding SHOULD succeed (emits popup signal)
-        QSignalSpy typeSpy(m_editor, &RcxEditor::typePickerRequested);
-        ok = m_editor->beginInlineEdit(EditTarget::Type, paddingLine);
-        QVERIFY2(ok, "Type edit should be allowed on Padding lines");
-        QCOMPARE(typeSpy.count(), 1);
-    }
-
-    // ── Test: resolvedSpanFor rejects Value on Padding (defense-in-depth) ──
-    void testPaddingLineRejectsValueSpan() {
-        m_editor->applyDocument(m_result);
-
-        // Find a Padding line
-        int paddingLine = -1;
-        for (int i = 0; i < m_result.meta.size(); i++) {
-            if (m_result.meta[i].nodeKind == NodeKind::Padding &&
-                m_result.meta[i].lineKind == LineKind::Field) {
-                paddingLine = i;
-                break;
-            }
-        }
-        QVERIFY(paddingLine >= 0);
-
-        const LineMeta* lm = m_editor->metaForLine(paddingLine);
-        QVERIFY(lm);
-
-        // valueSpanFor returns valid (shared with Hex via KF_HexPreview)
-        ColumnSpan vs = RcxEditor::valueSpan(*lm, 200);
-        QVERIFY2(vs.valid, "valueSpanFor should return valid for Padding (shared HexPreview flag)");
-
-        // But beginInlineEdit should still reject it
-        QVERIFY(!m_editor->beginInlineEdit(EditTarget::Value, paddingLine));
-        QVERIFY(!m_editor->isEditing());
-    }
-
     // ── Test: value edit commit fires signal with typed text ──
     void testValueEditCommitUpdatesSignal() {
         m_editor->applyDocument(m_result);
@@ -823,8 +760,6 @@ private slots:
         const LineMeta* lm = m_editor->metaForLine(kFirstDataLine);
         QVERIFY(lm);
         QCOMPARE(lm->lineKind, LineKind::Field);
-        QVERIFY(lm->nodeKind != NodeKind::Padding);
-
         // Begin value edit
         bool ok = m_editor->beginInlineEdit(EditTarget::Value, kFirstDataLine);
         QVERIFY(ok);

tests/test_generator.cpp

@@ -418,30 +418,6 @@ private slots:
         QVERIFY(result.contains("wchar_t wname[32];"));
     }
 
-    // ── Padding node ──
-
-    void testPaddingNode() {
-        rcx::NodeTree tree;
-        rcx::Node root;
-        root.kind = rcx::NodeKind::Struct;
-        root.name = "PadTest";
-        root.structTypeName = "PadTest";
-        root.parentId = 0;
-        int ri = tree.addNode(root);
-        uint64_t rootId = tree.nodes[ri].id;
-
-        rcx::Node pad;
-        pad.kind = rcx::NodeKind::Padding;
-        pad.name = "reserved";
-        pad.parentId = rootId;
-        pad.offset = 0;
-        pad.arrayLen = 16;
-        tree.addNode(pad);
-
-        QString result = rcx::renderCpp(tree, rootId);
-        QVERIFY(result.contains("uint8_t reserved[16];"));
-    }
-
     // ── Full SDK export (multiple root structs) ──
 
     void testFullSdkExport() {

tests/test_new_features.cpp

@@ -304,39 +304,6 @@ private slots:
         QVERIFY(result.contains("float speed;"));
     }
 
-    void testGenerator_typeAliases_padding() {
-        // Padding gap and tail padding should use aliased uint8_t
-        NodeTree tree;
-        Node root;
-        root.kind = NodeKind::Struct;
-        root.name = "PadTest";
-        root.structTypeName = "PadTest";
-        root.parentId = 0;
-        int ri = tree.addNode(root);
-        uint64_t rootId = tree.nodes[ri].id;
-
-        Node f1;
-        f1.kind = NodeKind::UInt32;
-        f1.name = "a";
-        f1.parentId = rootId;
-        f1.offset = 0;
-        tree.addNode(f1);
-
-        Node f2;
-        f2.kind = NodeKind::UInt32;
-        f2.name = "b";
-        f2.parentId = rootId;
-        f2.offset = 8;  // gap of 4 bytes at offset 4
-        tree.addNode(f2);
-
-        QHash<NodeKind, QString> aliases;
-        aliases[NodeKind::Padding] = "BYTE";
-
-        QString result = renderCpp(tree, rootId, &aliases);
-        // Padding gap should use the alias
-        QVERIFY(result.contains("BYTE _pad"));
-    }
-
     void testGenerator_typeAliases_array() {
         // Array element type should use alias
         NodeTree tree;
@@ -547,134 +514,92 @@ private slots:
     void testWorkspace_simpleTree() {
         auto tree = makeSimpleTree();
         QStandardItemModel model;
-        buildWorkspaceModel(&model, tree, "TestProject.rcx");
+        QVector<TabInfo> tabs = {{ &tree, "TestProject.rcx", nullptr }};
+        buildProjectExplorer(&model, tabs);
 
-        // 1 top-level item (the project)
+        // Single "Project" root
         QCOMPARE(model.rowCount(), 1);
         QStandardItem* project = model.item(0);
-        QCOMPARE(project->text(), QString("TestProject.rcx"));
+        QCOMPARE(project->text(), QString("Project"));
 
-        // Project has 1 child: the Player struct
+        // 1 type directly under Project: Player (no member fields)
         QCOMPARE(project->rowCount(), 1);
-        QStandardItem* player = project->child(0);
-        QVERIFY(player->text().contains("Player"));
-        QVERIFY(player->text().contains("struct"));
-
-        // Player struct has 2 children: health, speed
-        QCOMPARE(player->rowCount(), 2);
-        QVERIFY(player->child(0)->text().contains("health"));
-        QVERIFY(player->child(1)->text().contains("speed"));
+        QVERIFY(project->child(0)->text().contains("Player"));
+        QVERIFY(project->child(0)->text().contains("struct"));
+        QCOMPARE(project->child(0)->rowCount(), 0);
     }
 
     void testWorkspace_twoRootTree() {
         auto tree = makeTwoRootTree();
         QStandardItemModel model;
-        buildWorkspaceModel(&model, tree, "TwoRoot.rcx");
+        QVector<TabInfo> tabs = {{ &tree, "TwoRoot.rcx", nullptr }};
+        buildProjectExplorer(&model, tabs);
 
         QCOMPARE(model.rowCount(), 1);
         QStandardItem* project = model.item(0);
 
-        // 2 root struct children: Alpha and Bravo
+        // 2 types sorted alphabetically: Alpha, Bravo (no field children)
         QCOMPARE(project->rowCount(), 2);
         QVERIFY(project->child(0)->text().contains("Alpha"));
         QVERIFY(project->child(1)->text().contains("Bravo"));
-
-        // Each has 1 field child
-        QCOMPARE(project->child(0)->rowCount(), 1);
-        QVERIFY(project->child(0)->child(0)->text().contains("flagsA"));
-        QCOMPARE(project->child(1)->rowCount(), 1);
-        QVERIFY(project->child(1)->child(0)->text().contains("flagsB"));
+        QCOMPARE(project->child(0)->rowCount(), 0);
+        QCOMPARE(project->child(1)->rowCount(), 0);
     }
 
     void testWorkspace_richTree_rootCount() {
         auto tree = makeRichTree();
         QStandardItemModel model;
-        buildWorkspaceModel(&model, tree, "Rich.rcx");
+        QVector<TabInfo> tabs = {{ &tree, "Rich.rcx", nullptr }};
+        buildProjectExplorer(&model, tabs);
 
         QStandardItem* project = model.item(0);
-        QCOMPARE(project->rowCount(), 3);  // Pet, Cat, Ball
+        QCOMPARE(project->rowCount(), 3);  // Ball, Cat, Pet (sorted)
     }
 
-    void testWorkspace_richTree_petChildren() {
+    void testWorkspace_richTree_sorted() {
         auto tree = makeRichTree();
         QStandardItemModel model;
-        buildWorkspaceModel(&model, tree, "Rich.rcx");
+        QVector<TabInfo> tabs = {{ &tree, "Rich.rcx", nullptr }};
+        buildProjectExplorer(&model, tabs);
 
-        QStandardItem* pet = model.item(0)->child(0);
-        QVERIFY(pet->text().contains("Pet"));
-        // Pet has 2 non-hex children: name (UTF8), owner (Pointer64)
-        QCOMPARE(pet->rowCount(), 2);
-        QVERIFY(pet->child(0)->text().contains("name"));
-        QVERIFY(pet->child(1)->text().contains("owner"));
-    }
-
-    void testWorkspace_richTree_catNesting() {
-        auto tree = makeRichTree();
-        QStandardItemModel model;
-        buildWorkspaceModel(&model, tree, "Rich.rcx");
-
-        QStandardItem* cat = model.item(0)->child(1);
-        QVERIFY(cat->text().contains("Cat"));
-
-        // Find the nested "Pet" struct child (base)
-        QStandardItem* base = nullptr;
-        for (int i = 0; i < cat->rowCount(); i++) {
-            if (cat->child(i)->text().contains("Pet") &&
-                cat->child(i)->text().contains("struct")) {
-                base = cat->child(i);
-                break;
-            }
-        }
-        QVERIFY2(base != nullptr, "Cat should have a nested Pet struct child");
-
-        // base has structId set
-        QVERIFY(base->data(Qt::UserRole + 1).isValid());
-
-        // base should have its own children (name + owner)
-        QCOMPARE(base->rowCount(), 2);
-    }
-
-    void testWorkspace_richTree_ballChildren() {
-        auto tree = makeRichTree();
-        QStandardItemModel model;
-        buildWorkspaceModel(&model, tree, "Rich.rcx");
-
-        QStandardItem* ball = model.item(0)->child(2);
-        QVERIFY(ball->text().contains("Ball"));
-
-        // Ball has 3 non-hex children: speed, position, color
-        QCOMPARE(ball->rowCount(), 3);
-        QVERIFY(ball->child(0)->text().contains("speed"));
-        QVERIFY(ball->child(1)->text().contains("position"));
-        QVERIFY(ball->child(2)->text().contains("color"));
+        QStandardItem* project = model.item(0);
+        // Sorted alphabetically: Ball, Cat, Pet
+        QVERIFY(project->child(0)->text().contains("Ball"));
+        QVERIFY(project->child(1)->text().contains("Cat"));
+        QVERIFY(project->child(2)->text().contains("Pet"));
+        // No member fields under type nodes
+        QCOMPARE(project->child(0)->rowCount(), 0);
+        QCOMPARE(project->child(1)->rowCount(), 0);
+        QCOMPARE(project->child(2)->rowCount(), 0);
     }
 
     void testWorkspace_emptyTree() {
         NodeTree tree;
         QStandardItemModel model;
-        buildWorkspaceModel(&model, tree, "Empty.rcx");
+        QVector<TabInfo> tabs = {{ &tree, "Empty.rcx", nullptr }};
+        buildProjectExplorer(&model, tabs);
 
+        // Still has the "Project" root, just no children
         QCOMPARE(model.rowCount(), 1);
+        QCOMPARE(model.item(0)->text(), QString("Project"));
         QCOMPARE(model.item(0)->rowCount(), 0);
     }
 
     void testWorkspace_structIdRole() {
         auto tree = makeSimpleTree();
         QStandardItemModel model;
-        buildWorkspaceModel(&model, tree, "Test.rcx");
+        QVector<TabInfo> tabs = {{ &tree, "Test.rcx", nullptr }};
+        buildProjectExplorer(&model, tabs);
 
         QStandardItem* project = model.item(0);
-        // Project item should NOT have structId
-        QVERIFY(!project->data(Qt::UserRole + 1).isValid());
+        // Project root has kGroupSentinel
+        QCOMPARE(project->data(Qt::UserRole + 1).toULongLong(), kGroupSentinel);
 
-        // Player struct should have structId
+        // Player type item should have structId
         QStandardItem* player = project->child(0);
         QVERIFY(player->data(Qt::UserRole + 1).isValid());
         QVERIFY(player->data(Qt::UserRole + 1).toULongLong() > 0);
-
-        // health field should NOT have structId
-        QStandardItem* health = player->child(0);
-        QVERIFY(!health->data(Qt::UserRole + 1).isValid());
+        QVERIFY(player->data(Qt::UserRole + 1).toULongLong() != kGroupSentinel);
     }
 
     // ═══════════════════════════════════════════════════

tests/test_theme.cpp

@@ -11,31 +11,37 @@ class TestTheme : public QObject {
     Q_OBJECT
 private slots:
     void builtInThemes() {
-        Theme dark = Theme::reclassDark();
-        QCOMPARE(dark.name, "Reclass Dark");
-        QVERIFY(dark.background.isValid());
-        QVERIFY(dark.text.isValid());
-        QVERIFY(dark.syntaxKeyword.isValid());
-        QVERIFY(dark.markerError.isValid());
+        auto& tm = ThemeManager::instance();
+        auto all = tm.themes();
+        QVERIFY(all.size() >= 2);
 
-        Theme warm = Theme::warm();
-        QCOMPARE(warm.name, "Warm");
-        QVERIFY(warm.background.isValid());
-        QVERIFY(warm.text.isValid());
-        QCOMPARE(warm.background, QColor("#212121"));
-        QCOMPARE(warm.selection, QColor("#21213A"));
-        QCOMPARE(warm.syntaxKeyword, QColor("#AA9565"));
-        QCOMPARE(warm.syntaxType, QColor("#6B959F"));
-    }
+        // Find themes by name
+        const Theme* dark = nullptr;
+        const Theme* warm = nullptr;
+        for (const auto& t : all) {
+            if (t.name == "Reclass Dark") dark = &t;
+            if (t.name == "Warm") warm = &t;
+        }
+        QVERIFY(dark);
+        QCOMPARE(dark->name, QString("Reclass Dark"));
+        QVERIFY(dark->background.isValid());
+        QVERIFY(dark->text.isValid());
+        QVERIFY(dark->syntaxKeyword.isValid());
+        QVERIFY(dark->markerError.isValid());
 
-    void selectionColorFixed() {
-        Theme dark = Theme::reclassDark();
-        QCOMPARE(dark.selection, QColor("#2b2b2b"));
-        QVERIFY(dark.selection != QColor("#264f78"));
+        QVERIFY(warm);
+        QCOMPARE(warm->name, QString("Warm"));
+        QVERIFY(warm->background.isValid());
+        QVERIFY(warm->text.isValid());
+        QCOMPARE(warm->background, QColor("#212121"));
+        QCOMPARE(warm->selection, QColor("#21213A"));
+        QCOMPARE(warm->syntaxKeyword, QColor("#AA9565"));
+        QCOMPARE(warm->syntaxType, QColor("#6B959F"));
     }
 
     void jsonRoundTrip() {
-        Theme orig = Theme::reclassDark();
+        auto& tm = ThemeManager::instance();
+        Theme orig = tm.themes()[0];
         QJsonObject json = orig.toJson();
         Theme loaded = Theme::fromJson(json);
 
@@ -54,7 +60,12 @@ private slots:
     }
 
     void jsonRoundTripWarm() {
-        Theme orig = Theme::warm();
+        auto& tm = ThemeManager::instance();
+        auto all = tm.themes();
+        Theme orig;
+        for (const auto& t : all)
+            if (t.name == "Warm") { orig = t; break; }
+
         QJsonObject json = orig.toJson();
         Theme loaded = Theme::fromJson(json);
 
@@ -70,21 +81,27 @@ private slots:
         sparse["background"] = "#ff0000";
         Theme t = Theme::fromJson(sparse);
 
-        QCOMPARE(t.name, "Sparse");
+        QCOMPARE(t.name, QString("Sparse"));
         QCOMPARE(t.background, QColor("#ff0000"));
-        // Missing fields fall back to reclassDark defaults
-        Theme defaults = Theme::reclassDark();
-        QCOMPARE(t.text, defaults.text);
-        QCOMPARE(t.syntaxKeyword, defaults.syntaxKeyword);
-        QCOMPARE(t.markerError, defaults.markerError);
+        // Missing fields are default (invalid) QColor
+        QVERIFY(!t.text.isValid());
+        QVERIFY(!t.syntaxKeyword.isValid());
+        QVERIFY(!t.markerError.isValid());
     }
 
     void themeManagerHasBuiltIns() {
         auto& tm = ThemeManager::instance();
         auto all = tm.themes();
-        QVERIFY(all.size() >= 2);
-        QCOMPARE(all[0].name, "Reclass Dark");
-        QCOMPARE(all[1].name, "Warm");
+        QVERIFY(all.size() >= 3);
+        QCOMPARE(all[0].name, QString("Reclass Dark"));
+        // VS2022 Dark and Warm are also loaded (order depends on filename sort)
+        bool hasVs = false, hasWarm = false;
+        for (const auto& t : all) {
+            if (t.name == "VS2022 Dark") hasVs = true;
+            if (t.name == "Warm") hasWarm = true;
+        }
+        QVERIFY(hasVs);
+        QVERIFY(hasWarm);
     }
 
     void themeManagerSwitch() {
@@ -108,12 +125,12 @@ private slots:
         int initialCount = tm.themes().size();
 
         // Add
-        Theme custom = Theme::reclassDark();
+        Theme custom = tm.themes()[0];
         custom.name = "Test Custom";
         custom.background = QColor("#ff0000");
         tm.addTheme(custom);
         QCOMPARE(tm.themes().size(), initialCount + 1);
-        QCOMPARE(tm.themes().last().name, "Test Custom");
+        QCOMPARE(tm.themes().last().name, QString("Test Custom"));
 
         // Update
         int idx = tm.themes().size() - 1;

tests/test_type_selector.cpp

@@ -8,6 +8,8 @@
 #include <QLineEdit>
 #include <QListView>
 #include <QStringListModel>
+#include <QLabel>
+#include <QFrame>
 #include <Qsci/qsciscintilla.h>
 #include "controller.h"
 #include "typeselectorpopup.h"
@@ -198,6 +200,127 @@ private slots:
         }
     }
 
+    // ── Isolate first-show cost with different window flags ──
+
+    void benchmarkFirstShow() {
+        auto ms = [](qint64 ns) { return QString::number(ns / 1000000.0, 'f', 2); };
+
+        struct FlagTest {
+            const char* name;
+            Qt::WindowFlags flags;
+        };
+        FlagTest tests[] = {
+            {"Qt::Popup|Frameless",         Qt::Popup | Qt::FramelessWindowHint},
+            {"Qt::Tool|Frameless",          Qt::Tool | Qt::FramelessWindowHint},
+            {"Qt::ToolTip",                 Qt::ToolTip},
+            {"Qt::Window|Frameless",        Qt::Window | Qt::FramelessWindowHint},
+            {"Qt::Popup|Frameless (2nd)",   Qt::Popup | Qt::FramelessWindowHint},
+        };
+
+        for (const auto& test : tests) {
+            auto* f = new QFrame(nullptr, test.flags);
+            f->resize(300, 400);
+
+            QElapsedTimer t; t.start();
+            f->show();
+            qint64 t1 = t.nsecsElapsed(); t.restart();
+            QApplication::processEvents();
+            qint64 t2 = t.nsecsElapsed();
+            f->hide();
+            QApplication::processEvents();
+
+            t.restart();
+            f->show();
+            qint64 t3 = t.nsecsElapsed(); t.restart();
+            QApplication::processEvents();
+            qint64 t4 = t.nsecsElapsed();
+            f->hide();
+            QApplication::processEvents();
+
+            qDebug() << "";
+            qDebug().noquote() << QString("=== %1 ===").arg(test.name);
+            qDebug().noquote() << QString("  1st: show=%1ms events=%2ms | 2nd: show=%3ms events=%4ms")
+                .arg(ms(t1)).arg(ms(t2)).arg(ms(t3)).arg(ms(t4));
+            delete f;
+        }
+
+        // TypeSelectorPopup: cold vs after warmUp
+        {
+            auto* popup = new TypeSelectorPopup();
+            TypeEntry dummy;
+            dummy.entryKind = TypeEntry::Primitive;
+            dummy.primitiveKind = NodeKind::Hex8;
+            dummy.displayName = "test";
+            popup->setTypes({dummy});
+
+            QElapsedTimer t; t.start();
+            popup->show();
+            qint64 t1 = t.nsecsElapsed(); t.restart();
+            QApplication::processEvents();
+            qint64 t2 = t.nsecsElapsed();
+            popup->hide();
+            QApplication::processEvents();
+
+            t.restart();
+            popup->show();
+            qint64 t3 = t.nsecsElapsed(); t.restart();
+            QApplication::processEvents();
+            qint64 t4 = t.nsecsElapsed();
+            popup->hide();
+            QApplication::processEvents();
+
+            qDebug() << "";
+            qDebug().noquote() << QString("=== TypeSelectorPopup (cold, Qt::Popup) ===");
+            qDebug().noquote() << QString("  1st: show=%1ms events=%2ms | 2nd: show=%3ms events=%4ms")
+                .arg(ms(t1)).arg(ms(t2)).arg(ms(t3)).arg(ms(t4));
+            delete popup;
+        }
+
+        // Clean order test: dummy popup with children FIRST, then TypeSelectorPopup
+        qDebug() << "";
+        qDebug() << "=== CLEAN: dummy popup first, then TypeSelectorPopup ===";
+        {
+            auto* dummy = new QFrame(nullptr, Qt::Popup | Qt::FramelessWindowHint);
+            dummy->resize(300, 400);
+            auto* dLay = new QVBoxLayout(dummy);
+            dLay->addWidget(new QLabel("dummy"));
+            dLay->addWidget(new QLineEdit);
+            auto* dModel = new QStringListModel(dummy);
+            QStringList dItems; for (int i = 0; i < 10; i++) dItems << "x";
+            dModel->setStringList(dItems);
+            auto* dLv = new QListView; dLv->setModel(dModel);
+            dLay->addWidget(dLv);
+
+            QElapsedTimer t; t.start();
+            dummy->show();
+            qint64 t1 = t.nsecsElapsed(); t.restart();
+            QApplication::processEvents();
+            qint64 t2 = t.nsecsElapsed();
+            dummy->hide();
+            QApplication::processEvents();
+            qDebug().noquote() << QString("  Dummy popup: show=%1ms events=%2ms").arg(ms(t1)).arg(ms(t2));
+            delete dummy;
+        }
+        {
+            auto* popup = new TypeSelectorPopup();
+            TypeEntry e;
+            e.entryKind = TypeEntry::Primitive;
+            e.primitiveKind = NodeKind::Hex8;
+            e.displayName = "test";
+            popup->setTypes({e});
+            popup->resize(300, 400);
+            QElapsedTimer t; t.start();
+            popup->show();
+            qint64 t1 = t.nsecsElapsed(); t.restart();
+            QApplication::processEvents();
+            qint64 t2 = t.nsecsElapsed();
+            popup->hide();
+            QApplication::processEvents();
+            qDebug().noquote() << QString("  TypeSelectorPopup (after dummy): show=%1ms events=%2ms").arg(ms(t1)).arg(ms(t2));
+            delete popup;
+        }
+    }
+
     // ── Popup data model ──
 
     void testPopupListsRootStructs() {

tests/test_validation.cpp

@@ -57,8 +57,8 @@ static void buildValidationTree(NodeTree& tree) {
     field(46, NodeKind::Hex32,      "field_h32");
     field(50, NodeKind::Hex64,      "field_h64");
     field(58, NodeKind::Pointer64,  "field_ptr");
-    field(66, NodeKind::Padding,    "pad0");
-    tree.nodes.last().arrayLen = 6;
+    field(66, NodeKind::Hex32,      "pad0");
+    field(70, NodeKind::Hex16,      "pad1");
     fieldArr(72, NodeKind::UInt32, 4, "field_arr");
 }
 
@@ -725,9 +725,9 @@ private slots:
         QCOMPARE(m_doc->undoStack.count(), 0);
     }
 
-    // ── changeNodeKind size transitions: shrink inserts padding ──
+    // ── changeNodeKind size transitions: shrink inserts hex nodes ──
 
-    void testChangeKindShrinkInsertsPadding() {
+    void testChangeKindShrinkInsertsHexNodes() {
         int idx = findNode(m_doc->tree, "field_u32");
         QVERIFY(idx >= 0);
         QCOMPARE(m_doc->tree.nodes[idx].kind, NodeKind::UInt32);  // 4 bytes
@@ -737,7 +737,7 @@ private slots:
         QApplication::processEvents();
 
         QCOMPARE(m_doc->tree.nodes[idx].kind, NodeKind::UInt8);
-        // Should have inserted padding nodes (Hex16 + Hex8 = 3 bytes, or similar)
+        // Should have inserted hex nodes (Hex16 + Hex8 = 3 bytes, or similar)
         QVERIFY(m_doc->tree.nodes.size() > origCount);
 
         // Undo restores everything
@@ -985,37 +985,6 @@ private slots:
         QVERIFY(!m_editor->isEditing());
     }
 
-    // ── Editor: padding value edit blocked, name/type still work ──
-
-    void testPaddingEditRestrictions() {
-        m_ctrl->refresh();
-        QApplication::processEvents();
-
-        ComposeResult result = m_doc->compose();
-        m_editor->applyDocument(result);
-        QApplication::processEvents();
-
-        // Find padding line
-        int padLine = -1;
-        for (int i = 0; i < result.meta.size(); i++) {
-            if (result.meta[i].nodeKind == NodeKind::Padding &&
-                result.meta[i].lineKind == LineKind::Field) {
-                padLine = i;
-                break;
-            }
-        }
-        QVERIFY(padLine >= 0);
-
-        // Value edit rejected
-        QVERIFY(!m_editor->beginInlineEdit(EditTarget::Value, padLine));
-
-        // Type edit accepted
-        bool ok = m_editor->beginInlineEdit(EditTarget::Type, padLine);
-        QVERIFY(ok);
-        m_editor->cancelInlineEdit();
-        QApplication::processEvents();
-    }
-
     // ── Editor: struct header rejects value edit ──
 
     void testStructHeaderRejectsValueEdit() {

tests/test_windbg_provider.cpp

@@ -0,0 +1,463 @@
+#include <QTest>
+#include <QByteArray>
+#include <QProcess>
+#include <QThread>
+#include <QtConcurrent>
+#include <QFuture>
+#include <cstring>
+
+#include "providers/provider.h"
+#include "../plugins/WinDbgMemory/WinDbgMemoryPlugin.h"
+
+#ifdef _WIN32
+#include <windows.h>
+#include <tlhelp32.h>
+#include <initguid.h>
+#include <dbgeng.h>
+#endif
+
+using namespace rcx;
+
+static const char* CDB_PATH = "C:\\Program Files (x86)\\Windows Kits\\10\\Debuggers\\x64\\cdb.exe";
+static const int   DBG_PORT = 5055;
+
+class TestWinDbgProvider : public QObject {
+    Q_OBJECT
+
+private:
+    QProcess* m_cdbProcess = nullptr;
+    uint32_t  m_notepadPid = 0;
+    bool      m_weSpawnedNotepad = false;
+    QString   m_connString;
+
+    static uint32_t findProcess(const wchar_t* name)
+    {
+#ifdef _WIN32
+        HANDLE snap = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0);
+        if (snap == INVALID_HANDLE_VALUE) return 0;
+        PROCESSENTRY32W entry;
+        entry.dwSize = sizeof(entry);
+        uint32_t pid = 0;
+        if (Process32FirstW(snap, &entry)) {
+            do {
+                if (_wcsicmp(entry.szExeFile, name) == 0) {
+                    pid = entry.th32ProcessID;
+                    break;
+                }
+            } while (Process32NextW(snap, &entry));
+        }
+        CloseHandle(snap);
+        return pid;
+#else
+        Q_UNUSED(name); return 0;
+#endif
+    }
+
+    static uint32_t launchNotepad()
+    {
+#ifdef _WIN32
+        STARTUPINFOW si{};
+        si.cb = sizeof(si);
+        PROCESS_INFORMATION pi{};
+        if (CreateProcessW(L"C:\\Windows\\notepad.exe", nullptr, nullptr, nullptr,
+                           FALSE, 0, nullptr, nullptr, &si, &pi)) {
+            WaitForInputIdle(pi.hProcess, 3000);
+            CloseHandle(pi.hThread);
+            CloseHandle(pi.hProcess);
+            return pi.dwProcessId;
+        }
+        return 0;
+#else
+        return 0;
+#endif
+    }
+
+    static void terminateProcess(uint32_t pid)
+    {
+#ifdef _WIN32
+        HANDLE h = OpenProcess(PROCESS_TERMINATE, FALSE, pid);
+        if (h) { TerminateProcess(h, 0); CloseHandle(h); }
+#else
+        Q_UNUSED(pid);
+#endif
+    }
+
+private slots:
+
+    // ── Fixture ──
+
+    /// Try a quick DebugConnect to see if the port is already serving.
+    static bool canConnect(const QString& connStr)
+    {
+#ifdef _WIN32
+        IDebugClient* probe = nullptr;
+        QByteArray utf8 = connStr.toUtf8();
+        HRESULT hr = DebugConnect(utf8.constData(), IID_IDebugClient, (void**)&probe);
+        if (SUCCEEDED(hr) && probe) {
+            probe->EndSession(DEBUG_END_DISCONNECT);
+            probe->Release();
+            return true;
+        }
+        return false;
+#else
+        Q_UNUSED(connStr);
+        return false;
+#endif
+    }
+
+    void initTestCase()
+    {
+        m_connString = QString("tcp:Port=%1,Server=localhost").arg(DBG_PORT);
+
+        // If a debug server is already listening (e.g. WinDbg with .server),
+        // skip launching our own cdb.exe.
+        if (canConnect(m_connString)) {
+            qDebug() << "Debug server already running on port" << DBG_PORT << "— using it";
+            return;
+        }
+
+        // No server running — launch cdb ourselves
+        m_notepadPid = findProcess(L"notepad.exe");
+        if (m_notepadPid == 0) {
+            m_notepadPid = launchNotepad();
+            m_weSpawnedNotepad = true;
+        }
+        QVERIFY2(m_notepadPid != 0, "Need notepad.exe running");
+        qDebug() << "Using notepad.exe PID:" << m_notepadPid;
+
+        m_cdbProcess = new QProcess(this);
+        QStringList args;
+        args << "-server" << QString("tcp:port=%1").arg(DBG_PORT)
+             << "-pv"
+             << "-p" << QString::number(m_notepadPid);
+
+        m_cdbProcess->setProgram(CDB_PATH);
+        m_cdbProcess->setArguments(args);
+        m_cdbProcess->start();
+
+        QVERIFY2(m_cdbProcess->waitForStarted(5000), "Failed to start cdb.exe");
+        QThread::sleep(3);
+
+        qDebug() << "cdb.exe debug server started on port" << DBG_PORT;
+    }
+
+    void cleanupTestCase()
+    {
+        if (m_cdbProcess) {
+            m_cdbProcess->write("q\n");
+            if (!m_cdbProcess->waitForFinished(5000))
+                m_cdbProcess->kill();
+            delete m_cdbProcess;
+            m_cdbProcess = nullptr;
+        }
+
+        if (m_weSpawnedNotepad && m_notepadPid)
+            terminateProcess(m_notepadPid);
+    }
+
+    // ── Plugin metadata ──
+
+    void plugin_name()
+    {
+        WinDbgMemoryPlugin plugin;
+        QCOMPARE(plugin.Name(), std::string("WinDbg Memory"));
+    }
+
+    void plugin_version()
+    {
+        WinDbgMemoryPlugin plugin;
+        QCOMPARE(plugin.Version(), std::string("2.0.0"));
+    }
+
+    void plugin_canHandle_tcp()
+    {
+        WinDbgMemoryPlugin plugin;
+        QVERIFY(plugin.canHandle("tcp:Port=5055,Server=localhost"));
+        QVERIFY(plugin.canHandle("TCP:Port=1234,Server=10.0.0.1"));
+    }
+
+    void plugin_canHandle_npipe()
+    {
+        WinDbgMemoryPlugin plugin;
+        QVERIFY(plugin.canHandle("npipe:Pipe=test,Server=localhost"));
+    }
+
+    void plugin_canHandle_pid()
+    {
+        WinDbgMemoryPlugin plugin;
+        QVERIFY(plugin.canHandle("pid:1234"));
+    }
+
+    void plugin_canHandle_dump()
+    {
+        WinDbgMemoryPlugin plugin;
+        QVERIFY(plugin.canHandle("dump:C:/test.dmp"));
+    }
+
+    void plugin_canHandle_invalid()
+    {
+        WinDbgMemoryPlugin plugin;
+        QVERIFY(!plugin.canHandle(""));
+        QVERIFY(!plugin.canHandle("1234"));
+        QVERIFY(!plugin.canHandle("file:///test.bin"));
+    }
+
+    // ── Connection failure ──
+
+    void provider_connect_badPort()
+    {
+        WinDbgMemoryProvider prov("tcp:Port=59999,Server=localhost");
+        QVERIFY(!prov.isValid());
+        QCOMPARE(prov.size(), 0);
+    }
+
+    void provider_connect_badPipe()
+    {
+        WinDbgMemoryProvider prov("npipe:Pipe=nonexistent_reclass_test_pipe,Server=localhost");
+        QVERIFY(!prov.isValid());
+        QCOMPARE(prov.size(), 0);
+    }
+
+    void plugin_createProvider_badConnection()
+    {
+        WinDbgMemoryPlugin plugin;
+        QString error;
+        auto prov = plugin.createProvider("tcp:Port=59999,Server=localhost", &error);
+        QVERIFY(prov == nullptr);
+        QVERIFY(!error.isEmpty());
+    }
+
+    // ── Connect and read (main thread) ──
+
+    void provider_connect_valid()
+    {
+        WinDbgMemoryProvider prov(m_connString);
+        QVERIFY2(prov.isValid(), "Should connect to cdb debug server");
+        QCOMPARE(prov.kind(), QStringLiteral("WinDbg"));
+        QVERIFY(prov.size() > 0);
+    }
+
+    void provider_name()
+    {
+        WinDbgMemoryProvider prov(m_connString);
+        QVERIFY(prov.isValid());
+        QVERIFY(!prov.name().isEmpty());
+        qDebug() << "Provider name:" << prov.name();
+    }
+
+    void provider_isLive()
+    {
+        WinDbgMemoryProvider prov(m_connString);
+        QVERIFY(prov.isValid());
+        QVERIFY(prov.isLive());
+    }
+
+    void provider_baseAddress()
+    {
+        WinDbgMemoryProvider prov(m_connString);
+        QVERIFY(prov.isValid());
+        QVERIFY2(prov.base() != 0, "Should have a non-zero base from first module");
+        qDebug() << "Base address:" << QString("0x%1").arg(prov.base(), 0, 16);
+    }
+
+    void provider_setBase()
+    {
+        WinDbgMemoryProvider prov(m_connString);
+        QVERIFY(prov.isValid());
+        uint64_t orig = prov.base();
+        prov.setBase(0x1000);
+        QCOMPARE(prov.base(), (uint64_t)0x1000);
+        prov.setBase(orig);
+        QCOMPARE(prov.base(), orig);
+    }
+
+    // ── Read: MZ header on main thread ──
+
+    void provider_read_mz_mainThread()
+    {
+        WinDbgMemoryProvider prov(m_connString);
+        QVERIFY(prov.isValid());
+
+        uint8_t buf[2] = {};
+        bool ok = prov.read(0, buf, 2);
+        QVERIFY2(ok, "Failed to read from debug session (main thread)");
+        QCOMPARE(buf[0], (uint8_t)'M');
+        QCOMPARE(buf[1], (uint8_t)'Z');
+    }
+
+    // ── Read: MZ header from a background thread (the actual failure case) ──
+
+    void provider_read_mz_backgroundThread()
+    {
+        WinDbgMemoryProvider prov(m_connString);
+        QVERIFY(prov.isValid());
+
+        // Simulate what the controller's refresh does:
+        // read from a QtConcurrent worker thread.
+        QFuture<QByteArray> future = QtConcurrent::run([&prov]() -> QByteArray {
+            return prov.readBytes(0, 128);
+        });
+        future.waitForFinished();
+        QByteArray data = future.result();
+
+        QCOMPARE(data.size(), 128);
+        QCOMPARE((uint8_t)data[0], (uint8_t)'M');
+        QCOMPARE((uint8_t)data[1], (uint8_t)'Z');
+    }
+
+    // ── Read: bulk data from background thread ──
+
+    void provider_read_4k_backgroundThread()
+    {
+        WinDbgMemoryProvider prov(m_connString);
+        QVERIFY(prov.isValid());
+
+        QFuture<QByteArray> future = QtConcurrent::run([&prov]() -> QByteArray {
+            return prov.readBytes(0, 4096);
+        });
+        future.waitForFinished();
+        QByteArray data = future.result();
+
+        QCOMPARE(data.size(), 4096);
+        QCOMPARE((uint8_t)data[0], (uint8_t)'M');
+        QCOMPARE((uint8_t)data[1], (uint8_t)'Z');
+
+        // Verify it's not all zeros (the old failure mode)
+        bool allZero = true;
+        for (int i = 0; i < data.size(); ++i) {
+            if (data[i] != 0) { allZero = false; break; }
+        }
+        QVERIFY2(!allZero, "Data is all zeros — background thread read failed");
+    }
+
+    // ── Multiple sequential background reads (simulates refresh timer) ──
+
+    void provider_read_multipleRefreshes()
+    {
+        WinDbgMemoryProvider prov(m_connString);
+        QVERIFY(prov.isValid());
+
+        for (int i = 0; i < 5; ++i) {
+            QFuture<QByteArray> future = QtConcurrent::run([&prov]() -> QByteArray {
+                return prov.readBytes(0, 128);
+            });
+            future.waitForFinished();
+            QByteArray data = future.result();
+            QCOMPARE(data.size(), 128);
+            QCOMPARE((uint8_t)data[0], (uint8_t)'M');
+            QCOMPARE((uint8_t)data[1], (uint8_t)'Z');
+        }
+    }
+
+    // ── Read helpers ──
+
+    void provider_readU16()
+    {
+        WinDbgMemoryProvider prov(m_connString);
+        QVERIFY(prov.isValid());
+        QCOMPARE(prov.readU16(0), (uint16_t)0x5A4D); // "MZ" little-endian
+    }
+
+    void provider_read_peSignature()
+    {
+        WinDbgMemoryProvider prov(m_connString);
+        QVERIFY(prov.isValid());
+
+        uint32_t peOffset = prov.readU32(0x3C);
+        QVERIFY2(peOffset > 0 && peOffset < 0x1000, "PE offset should be reasonable");
+
+        uint8_t sig[4] = {};
+        bool ok = prov.read(peOffset, sig, 4);
+        QVERIFY(ok);
+        QCOMPARE(sig[0], (uint8_t)'P');
+        QCOMPARE(sig[1], (uint8_t)'E');
+        QCOMPARE(sig[2], (uint8_t)0);
+        QCOMPARE(sig[3], (uint8_t)0);
+    }
+
+    // ── Edge cases ──
+
+    void provider_read_zeroLength()
+    {
+        WinDbgMemoryProvider prov(m_connString);
+        QVERIFY(prov.isValid());
+        uint8_t buf = 0xFF;
+        QVERIFY(!prov.read(0, &buf, 0));
+    }
+
+    void provider_read_negativeLength()
+    {
+        WinDbgMemoryProvider prov(m_connString);
+        QVERIFY(prov.isValid());
+        uint8_t buf = 0xFF;
+        QVERIFY(!prov.read(0, &buf, -1));
+    }
+
+    // ── getSymbol ──
+
+    void provider_getSymbol()
+    {
+        WinDbgMemoryProvider prov(m_connString);
+        QVERIFY(prov.isValid());
+        QString sym = prov.getSymbol(0);
+        qDebug() << "Symbol at base+0:" << sym;
+        // Should not crash; may or may not resolve
+    }
+
+    void provider_getSymbol_backgroundThread()
+    {
+        WinDbgMemoryProvider prov(m_connString);
+        QVERIFY(prov.isValid());
+
+        QFuture<QString> future = QtConcurrent::run([&prov]() -> QString {
+            return prov.getSymbol(0);
+        });
+        future.waitForFinished();
+        // Should not crash from background thread
+        qDebug() << "Symbol (bg thread):" << future.result();
+    }
+
+    // ── createProvider full flow ──
+
+    void plugin_createProvider_valid()
+    {
+        WinDbgMemoryPlugin plugin;
+        QString error;
+        auto prov = plugin.createProvider(m_connString, &error);
+        QVERIFY2(prov != nullptr, qPrintable("createProvider failed: " + error));
+        QVERIFY(prov->isValid());
+
+        uint8_t mz[2] = {};
+        QVERIFY(prov->read(0, mz, 2));
+        QCOMPARE(mz[0], (uint8_t)'M');
+        QCOMPARE(mz[1], (uint8_t)'Z');
+    }
+
+    // ── Multiple concurrent connections ──
+
+    void provider_multipleConcurrent()
+    {
+        WinDbgMemoryProvider prov1(m_connString);
+        WinDbgMemoryProvider prov2(m_connString);
+
+        QVERIFY(prov1.isValid());
+        QVERIFY(prov2.isValid());
+
+        QCOMPARE(prov1.readU16(0), (uint16_t)0x5A4D);
+        QCOMPARE(prov2.readU16(0), (uint16_t)0x5A4D);
+    }
+
+    // ── Factory ──
+
+    void factory_createPlugin()
+    {
+        IPlugin* raw = CreatePlugin();
+        QVERIFY(raw != nullptr);
+        QCOMPARE(raw->Type(), IPlugin::ProviderPlugin);
+        QCOMPARE(raw->Name(), std::string("WinDbg Memory"));
+        delete raw;
+    }
+};
+
+QTEST_MAIN(TestWinDbgProvider)
+#include "test_windbg_provider.moc"

tools/rcx-mcp-stdio.cpp

@@ -15,6 +15,9 @@
 #include <windows.h>
 #include <io.h>
 #include <fcntl.h>
+#else
+#include <unistd.h>
+#include <sys/select.h>
 #endif
 
 int main(int argc, char* argv[]) {