feat: update Qt requirement to 6.8 LTS (#5)

- Update CI builds to Qt 6.8.3 LTS
- Add Apple Silicon (ARM) macOS build target
- Fix Windows build to use MSVC 2022
- Remove specific Qt version numbers from documentation
- Update project description to emphasize secure offline operation
- Add plugin sandboxing info to README

refactor(ui): migrate dialogs and settings tabs to Qt Designer UI files

- Convert settings tabs to use .ui files for cleaner separation
- Add model download manager and registration dialog
- Add plugin wizard with wizard pages
- Add Python environment manager
- Simplify code by moving UI creation to Qt Designer

Author: lstachowicz

.claude/CLAUDE.md

@@ -1,7 +1,7 @@
 # GitHub Copilot Instructions for PolySeg
 
 ## Project Overview
-PolySeg is a Qt6-based polygon annotation tool for creating instance segmentation datasets. The application enables interactive drawing, editing, and management of polygon annotations on images, exporting to normalized coordinate format compatible with various deep learning frameworks through plugin architecture.
+PolySeg is a secure offline polygon annotation tool for creating instance segmentation datasets. The application enables interactive drawing, editing, and management of polygon annotations on images, exporting to normalized coordinate format compatible with various deep learning frameworks through plugin architecture.
 
 ## Code Standards and Language Requirements
 
@@ -54,7 +54,7 @@ feat(canvas): add multi-polygon selection support
 
 fix(plugins): resolve memory leak in AI model loading
 
-docs: update build instructions for Qt 6.4
+docs: update build instructions
 
 refactor(mainwindow): extract file dialog logic to separate method
 ```
@@ -192,8 +192,8 @@ painter.drawLine(p1, p2);
 - Verify annotation format: Check .txt file has multiple lines
 
 ## Dependencies
-- Qt 6.5.3 (Core, Widgets, GUI)
 - C++17 compiler
+- qmake build system
 - Future: OpenCV (for AI features in Phase 7)
 
 ## Notes for AI Assistance
@@ -279,14 +279,12 @@ Example:
 
 ## Technologies:
 
-- Qt 6.5.3
-- C++
+- C++17
 - QPainter for 2D graphics
-- Qt Designer for UI
 
 ## Build:
 
-Project uses Qt Creator and qmake. Build from the `build` directory:
+Build from the `build` directory:
 ```bash
 cd build
 qmake ../PolySeg.pro

.github/workflows/build.yml

@@ -13,12 +13,12 @@ jobs:
     - uses: actions/checkout@v4
 
     - name: Install Qt
-      uses: jurplel/install-qt-action@v4
+      uses: jurplel/install-qt-action@v4.3.0
       with:
-        version: '6.5.3'
+        version: '6.8.3'
         host: 'linux'
         target: 'desktop'
-        arch: 'gcc_64'
+        arch: 'linux_gcc_64'
         cache: true
 
     - name: Build
@@ -38,12 +38,12 @@ jobs:
     - uses: actions/checkout@v4
 
     - name: Install Qt
-      uses: jurplel/install-qt-action@v4
+      uses: jurplel/install-qt-action@v4.3.0
       with:
-        version: '6.5.3'
+        version: '6.8.3'
         host: 'windows'
         target: 'desktop'
-        arch: 'win64_msvc2019_64'
+        arch: 'win64_msvc2022_64'
         cache: true
 
     - name: Setup MSVC
@@ -60,15 +60,40 @@ jobs:
         name: PolySeg-windows
         path: release/PolySeg.exe
 
-  build-macos:
+  build-macos-intel:
+    runs-on: macos-15
+    steps:
+    - uses: actions/checkout@v4
+
+    - name: Install Qt
+      uses: jurplel/install-qt-action@v4.3.0
+      with:
+        version: '6.8.3'
+        host: 'mac'
+        target: 'desktop'
+        arch: 'clang_64'
+        cache: true
+
+    - name: Build
+      run: |
+        qmake PolySeg.pro CONFIG+=release
+        make -j$(sysctl -n hw.ncpu)
+
+    - name: Upload artifact
+      uses: actions/upload-artifact@v4
+      with:
+        name: PolySeg-macos-intel
+        path: PolySeg.app
+
+  build-macos-arm:
     runs-on: macos-latest
     steps:
     - uses: actions/checkout@v4
 
     - name: Install Qt
-      uses: jurplel/install-qt-action@v4
+      uses: jurplel/install-qt-action@v4.3.0
       with:
-        version: '6.5.3'
+        version: '6.8.3'
         host: 'mac'
         target: 'desktop'
         arch: 'clang_64'
@@ -82,5 +107,5 @@ jobs:
     - name: Upload artifact
       uses: actions/upload-artifact@v4
       with:
-        name: PolySeg-macos
+        name: PolySeg-macos-arm
         path: PolySeg.app

NOTICE

@@ -13,7 +13,7 @@ The original copyright notices and licenses are provided below.
 
 ================================================================================
 
-Qt Framework (v6.5.3)
+Qt Framework
 Copyright (C) The Qt Company Ltd.
 Licensed under GNU Lesser General Public License v3 (LGPL v3)
 

PolySeg.pro

@@ -1,47 +1,156 @@
-QT       += core gui
+QT       += core gui network
 
 greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
 
-CONFIG += c++17
+CONFIG += c++17 strict_c++
+
+# Compiler warning flags (best practices)
+gcc|clang {
+    QMAKE_CXXFLAGS += -Wall
+    QMAKE_CXXFLAGS += -Wextra
+    QMAKE_CXXFLAGS += -Wpedantic
+    QMAKE_CXXFLAGS += -Wshadow
+    QMAKE_CXXFLAGS += -Wnon-virtual-dtor
+    QMAKE_CXXFLAGS += -Wold-style-cast
+    QMAKE_CXXFLAGS += -Wcast-align
+    QMAKE_CXXFLAGS += -Wunused
+    QMAKE_CXXFLAGS += -Woverloaded-virtual
+    # warnings in Qt headers that cannot be fixed in user code
+    # QMAKE_CXXFLAGS += -Wconversion
+    # QMAKE_CXXFLAGS += -Wsign-conversion
+    QMAKE_CXXFLAGS += -Wnull-dereference
+    QMAKE_CXXFLAGS += -Wdouble-promotion
+    QMAKE_CXXFLAGS += -Wformat=2
+    QMAKE_CXXFLAGS += -Wimplicit-fallthrough
+}
+
+# MSVC warning flags
+msvc {
+    QMAKE_CXXFLAGS += /W4
+    QMAKE_CXXFLAGS += /permissive-
+}
+
+# GCC-specific warnings
+gcc:!clang {
+    QMAKE_CXXFLAGS += -Wduplicated-cond
+    QMAKE_CXXFLAGS += -Wduplicated-branches
+    QMAKE_CXXFLAGS += -Wlogical-op
+# warnings in Qt headers that cannot be fixed in user code
+#    QMAKE_CXXFLAGS += -Wuseless-cast
+}
+
+# Treat warnings as errors in release builds (optional, uncomment if desired)
+# CONFIG(release, debug|release): QMAKE_CXXFLAGS += -Werror
+
+# Debug-specific flags
+CONFIG(debug, debug|release) {
+    gcc|clang {
+        QMAKE_CXXFLAGS += -g3
+        QMAKE_CXXFLAGS += -fno-omit-frame-pointer
+        # Enable sanitizers for debug builds (uncomment as needed)
+        # QMAKE_CXXFLAGS += -fsanitize=address,undefined
+        # QMAKE_LFLAGS += -fsanitize=address,undefined
+    }
+    msvc {
+        QMAKE_CXXFLAGS += /Zi
+    }
+}
+
+# Release-specific flags
+CONFIG(release, debug|release) {
+    gcc|clang {
+        QMAKE_CXXFLAGS += -O2
+    }
+    msvc {
+        QMAKE_CXXFLAGS += /O2
+    }
+    DEFINES += NDEBUG
+}
 
 # Include paths
 INCLUDEPATH += src
 
 # You can make your code fail to compile if it uses deprecated APIs.
 # In order to do so, uncomment the following line.
-#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0
+#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060800    # disables all APIs deprecated before 6.8
 
 SOURCES += \
     src/main.cpp \
     src/mainwindow.cpp \
     src/modelcomparisondialog.cpp \
+    src/modeldownloadmanager.cpp \
+    src/modelregistrationdialog.cpp \
     src/polygoncanvas.cpp \
     src/projectconfig.cpp \
+    src/pythonenvironmentmanager.cpp \
     src/settingstabbase.cpp \
     src/projectsettingstab.cpp \
     src/aimodelsettingstab.cpp \
     src/importexportsettingstab.cpp \
     src/settingsdialog.cpp \
     src/shortcuteditdialog.cpp \
     src/shortcutssettingstab.cpp \
-    src/aipluginmanager.cpp
+    src/aipluginmanager.cpp \
+    src/pluginwizard.cpp \
+    src/wizardpages/welcomepage.cpp \
+    src/wizardpages/pluginselectionpage.cpp \
+    src/wizardpages/custompluginpage.cpp \
+    src/wizardpages/modelselectionpage.cpp \
+    src/wizardpages/pretrainedmodelpage.cpp \
+    src/wizardpages/downloadpage.cpp \
+    src/wizardpages/configurationpage.cpp \
+    src/wizardpages/customconfigurationpage.cpp \
+    src/wizardpages/summarypage.cpp
 
 HEADERS += \
     src/mainwindow.h \
     src/modelcomparisondialog.h \
+    src/modeldownloadmanager.h \
+    src/modelregistrationdialog.h \
     src/polygoncanvas.h \
     src/projectconfig.h \
+    src/pythonenvironmentmanager.h \
     src/settingstabbase.h \
     src/projectsettingstab.h \
     src/aimodelsettingstab.h \
     src/importexportsettingstab.h \
     src/settingsdialog.h \
     src/shortcuteditdialog.h \
     src/shortcutssettingstab.h \
-    src/aipluginmanager.h
+    src/aipluginmanager.h \
+    src/pluginwizard.h \
+    src/wizardpages/welcomepage.h \
+    src/wizardpages/pluginselectionpage.h \
+    src/wizardpages/custompluginpage.h \
+    src/wizardpages/modelselectionpage.h \
+    src/wizardpages/pretrainedmodelpage.h \
+    src/wizardpages/downloadpage.h \
+    src/wizardpages/configurationpage.h \
+    src/wizardpages/customconfigurationpage.h \
+    src/wizardpages/summarypage.h
 
 FORMS += \
-    src/mainwindow.ui
+    src/mainwindow.ui \
+    src/settingsdialog.ui \
+    src/aimodelsettingstab.ui \
+    src/projectsettingstab.ui \
+    src/importexportsettingstab.ui \
+    src/shortcutssettingstab.ui \
+    src/shortcuteditdialog.ui \
+    src/modelcomparisondialog.ui \
+    src/modelregistrationdialog.ui \
+    src/wizardpages/welcomepage.ui \
+    src/wizardpages/pluginselectionpage.ui \
+    src/wizardpages/custompluginpage.ui \
+    src/wizardpages/modelselectionpage.ui \
+    src/wizardpages/pretrainedmodelpage.ui \
+    src/wizardpages/downloadpage.ui \
+    src/wizardpages/configurationpage.ui \
+    src/wizardpages/customconfigurationpage.ui \
+    src/wizardpages/summarypage.ui
+
+RESOURCES += \
+    resources/resources.qrc
 
 # Default rules for deployment.
 qnx: target.path = /tmp/$${TARGET}/bin

README.md

@@ -3,9 +3,8 @@
 **Smart Polygon Annotation with Universal AI Plugin Support**
 
 [![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](https://opensource.org/licenses/MIT)
-[![Qt Version](https://img.shields.io/badge/Qt-6.5.3-green.svg)](https://www.qt.io/)
 
-A professional Qt6-based desktop application for creating polygon annotations for computer vision training datasets. Features a **universal AI plugin system** that integrates with any AI detection framework.
+A secure offline desktop application for creating polygon annotations for computer vision training datasets. Features a **universal AI plugin system** that integrates with any AI detection framework.
 
 ---
 
@@ -81,39 +80,10 @@ PolySeg is designed for ML engineers, data scientists, and researchers who need
 
 ### Build Requirements
 
-- **Qt Framework**: 6.5.3 or later
 - **Compiler**: C++17 compatible (GCC, Clang, MSVC)
-- **Build System**: qmake
+- **Build System**: qmake (requires Qt 6.8+)
 - **Optional**: clang-format and clang-tidy (for development)
 
-### Installing Qt 6.4
-
-**Linux (Ubuntu/Debian):**
-```bash
-sudo apt-get update
-sudo apt-get install -y qt6-base-dev qt6-tools-dev-tools
-```
-
-**Linux (Fedora):**
-```bash
-sudo dnf install qt6-qtbase-devel qt6-qttools-devel
-```
-
-**Linux (Arch):**
-```bash
-sudo pacman -S qt6-base qt6-tools
-```
-
-**macOS (Homebrew):**
-```bash
-brew install qt@6
-```
-
-**Windows:**
-- Download Qt installer from [qt.io/download](https://www.qt.io/download-open-source)
-- Run the installer and select Qt 6.5.3 with MSVC compiler
-- Add Qt bin directory to PATH (e.g., `C:\Qt\6.5.3\msvc2019_64\bin`)
-
 ### AI Plugin Requirements (Optional)
 
 To use AI-assisted annotation, you need:
@@ -368,6 +338,7 @@ PolySeg (C++/Qt) ←→ subprocess ←→ Plugin (Python/other)
 - **Zero dependencies**: PolySeg does NOT link to AI libraries
 - **Simple protocol**: JSON-based stdin/stdout communication
 - **Flexible deployment**: Native Python, Docker, virtualenv, conda
+- **Sandboxed execution**: Run plugins in Docker containers for complete isolation
 
 ### Plugin Configuration Examples
 
@@ -896,7 +867,7 @@ MIT and Apache 2.0 licensed plugins can be freely integrated.
 
 This application is built with:
 
-- **Qt Framework 6.5.3** - LGPL v3 License ([https://www.qt.io/](https://www.qt.io/))
+- **Qt Framework** - LGPL v3 License ([https://www.qt.io/](https://www.qt.io/))
   - Qt is dynamically linked, allowing users to replace libraries under LGPL v3 terms
 
 ---

THIRD-PARTY-LICENSES.md

@@ -4,7 +4,6 @@ PolySeg uses the following third-party software components:
 
 ## Qt Framework
 
-**Version:** 6.5.3  
 **License:** GNU Lesser General Public License v3 (LGPL v3)  
 **Copyright:** The Qt Company Ltd.  
 **Website:** https://www.qt.io/