feat: migrate build system from qmake to CMake

.claude/CLAUDE.md

@@ -186,14 +186,14 @@ painter.drawLine(p1, p2);
 - Use `QFileInfo` for path manipulation
 
 ## Testing Guidelines
-- Build: `qmake6 PolySeg.pro && make -j4`
+- Build: `mkdir build && cd build && cmake .. -DCMAKE_BUILD_TYPE=Release && make -j4`
 - Run: `./PolySeg`
 - Test multi-polygon: Draw → Enter → Draw → Enter → Save
 - Verify annotation format: Check .txt file has multiple lines
 
 ## Dependencies
 - C++17 compiler
-- qmake build system
+- CMake 3.20+ build system
 - Future: OpenCV (for AI features in Phase 7)
 
 ## Notes for AI Assistance
@@ -287,14 +287,14 @@ Example:
 Build from the `build` directory:
 ```bash
 cd build
-qmake ../PolySeg.pro
+cmake .. -DCMAKE_BUILD_TYPE=Release
 make -j$(nproc)
 ```
 
 For clean build:
 ```bash
-cd build
-make clean
-qmake ../PolySeg.pro
+rm -rf build
+mkdir build && cd build
+cmake .. -DCMAKE_BUILD_TYPE=Release
 make -j$(nproc)
 ```

.github/workflows/build.yml

@@ -11,6 +11,13 @@ jobs:
     runs-on: ubuntu-24.04
     steps:
     - uses: actions/checkout@v4
+      with:
+        submodules: recursive
+
+    - name: Install dependencies
+      run: |
+        sudo apt-get update
+        sudo apt-get install -y lcov
 
     - name: Install Qt
       uses: jurplel/install-qt-action@v4.3.0
@@ -21,21 +28,80 @@ jobs:
         arch: 'linux_gcc_64'
         cache: true
 
-    - name: Build
+    - name: Build with coverage
       run: |
-        qmake PolySeg.pro CONFIG+=release
+        mkdir build && cd build
+        cmake .. -DCMAKE_BUILD_TYPE=Debug -DENABLE_COVERAGE=ON
         make -j$(nproc)
 
+    - name: Run tests
+      run: |
+        cd build
+        ctest --verbose
+
+    - name: Generate coverage report
+      run: |
+        cd build
+        make coverage
+
+    - name: Coverage summary
+      run: |
+        cd build
+        echo "## Code Coverage Report" >> $GITHUB_STEP_SUMMARY
+        echo "" >> $GITHUB_STEP_SUMMARY
+
+        # Extract overall coverage
+        COVERAGE_PCT=$(lcov --summary coverage_src_only.info 2>/dev/null | grep "lines" | awk '{print $2}' | head -1)
+        COVERAGE_LINES=$(lcov --summary coverage_src_only.info 2>/dev/null | grep "lines" | awk '{print $4"/"$6}' | head -1)
+        COVERAGE_FUNCS=$(lcov --summary coverage_src_only.info 2>/dev/null | grep "functions" | awk '{print $2}' | head -1)
+
+        echo "| Metric | Value |" >> $GITHUB_STEP_SUMMARY
+        echo "|--------|-------|" >> $GITHUB_STEP_SUMMARY
+        echo "| Line Coverage | ${COVERAGE_PCT} |" >> $GITHUB_STEP_SUMMARY
+        echo "| Lines Covered | ${COVERAGE_LINES} |" >> $GITHUB_STEP_SUMMARY
+        echo "| Function Coverage | ${COVERAGE_FUNCS} |" >> $GITHUB_STEP_SUMMARY
+        echo "" >> $GITHUB_STEP_SUMMARY
+
+        # Simple file coverage using genhtml output
+        echo "### Coverage by File" >> $GITHUB_STEP_SUMMARY
+        echo "| File | Lines | Coverage |" >> $GITHUB_STEP_SUMMARY
+        echo "|------|-------|----------|" >> $GITHUB_STEP_SUMMARY
+
+        # Extract file coverage from genhtml verbose output
+        genhtml coverage_src_only.info --quiet --output-directory /tmp/cov_temp 2>&1 | \
+          grep "Processing file" | \
+          sed 's/Processing file //' | \
+          grep "src/" | \
+          head -10 | \
+          while read line; do
+            file=$(echo "$line" | cut -d' ' -f1)
+            echo "| \`$file\` | - | - |" >> $GITHUB_STEP_SUMMARY
+          done
+
+    - name: Upload coverage to Codecov
+      uses: codecov/codecov-action@v4
+      with:
+        file: build/coverage_src_only.info
+        fail_ci_if_error: false
+
+    - name: Upload coverage report
+      uses: actions/upload-artifact@v4
+      with:
+        name: coverage-report
+        path: build/coverage_html/
+
     - name: Upload artifact
       uses: actions/upload-artifact@v4
       with:
         name: PolySeg-linux
-        path: PolySeg
+        path: build/PolySeg
 
   build-windows:
     runs-on: windows-latest
     steps:
     - uses: actions/checkout@v4
+      with:
+        submodules: recursive
 
     - name: Install Qt
       uses: jurplel/install-qt-action@v4.3.0
@@ -51,19 +117,28 @@ jobs:
 
     - name: Build
       run: |
-        qmake PolySeg.pro CONFIG+=release
-        nmake
+        mkdir build
+        cd build
+        cmake .. -DCMAKE_BUILD_TYPE=Release
+        cmake --build . --config Release
+
+    - name: Run tests
+      run: |
+        cd build
+        ctest -C Release --verbose
 
     - name: Upload artifact
       uses: actions/upload-artifact@v4
       with:
         name: PolySeg-windows
-        path: release/PolySeg.exe
+        path: build/Release/PolySeg.exe
 
   build-macos-intel:
     runs-on: macos-15
     steps:
     - uses: actions/checkout@v4
+      with:
+        submodules: recursive
 
     - name: Install Qt
       uses: jurplel/install-qt-action@v4.3.0
@@ -76,19 +151,27 @@ jobs:
 
     - name: Build
       run: |
-        qmake PolySeg.pro CONFIG+=release
+        mkdir build && cd build
+        cmake .. -DCMAKE_BUILD_TYPE=Release
         make -j$(sysctl -n hw.ncpu)
 
+    - name: Run tests
+      run: |
+        cd build
+        ctest --verbose
+
     - name: Upload artifact
       uses: actions/upload-artifact@v4
       with:
         name: PolySeg-macos-intel
-        path: PolySeg.app
+        path: build/PolySeg.app
 
   build-macos-arm:
     runs-on: macos-latest
     steps:
     - uses: actions/checkout@v4
+      with:
+        submodules: recursive
 
     - name: Install Qt
       uses: jurplel/install-qt-action@v4.3.0
@@ -101,11 +184,17 @@ jobs:
 
     - name: Build
       run: |
-        qmake PolySeg.pro CONFIG+=release
+        mkdir build && cd build
+        cmake .. -DCMAKE_BUILD_TYPE=Release
         make -j$(sysctl -n hw.ncpu)
 
+    - name: Run tests
+      run: |
+        cd build
+        ctest --verbose
+
     - name: Upload artifact
       uses: actions/upload-artifact@v4
       with:
         name: PolySeg-macos-arm
-        path: PolySeg.app
+        path: build/PolySeg.app

.gitignore

@@ -30,3 +30,11 @@ PolySeg
 # OS
 .DS_Store
 Thumbs.db
+
+# Internal documentation and planning files
+docs/*-plan.md
+docs/*-specification.md
+docs/*-implementation*.md
+docs/internal-*
+docs/planning-*
+*.coverage-baseline

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "external/googletest"]
+	path = external/googletest
+	url = https://github.com/google/googletest.git