style: Apply clang-format to all C++ files

- Format MainWindow.cpp, MainWindow.h, main.cpp
- Format test files (test_main.cpp, test_mainwindow.cpp)
- Fixes Jenkins clang-format policy check

Entire-Checkpoint: ea47c089bf3a
Signed-off-by: twi-devel <torsten.wierschin@life-maps.com>

qt6-after/qt6-migrated-benchmark/tests/test_main.cpp

@@ -4,7 +4,7 @@ class TestMainWindow : public QObject
 {
     Q_OBJECT
 
-private slots:
+  private slots:
     void testValidateInputValid();
     void testValidateInputInvalid();
     void testValidateInputEmpty();
@@ -15,7 +15,7 @@ void TestMainWindow::testValidateInputValid()
 {
     // Test valid input patterns
     QRegularExpression pattern(R"(^[A-Za-z]+\d+$)");
-    
+
     QVERIFY(pattern.match("Test123").hasMatch());
     QVERIFY(pattern.match("abc456").hasMatch());
     QVERIFY(pattern.match("ABC789").hasMatch());
@@ -25,7 +25,7 @@ void TestMainWindow::testValidateInputInvalid()
 {
     // Test invalid input patterns
     QRegularExpression pattern(R"(^[A-Za-z]+\d+$)");
-    
+
     QVERIFY(!pattern.match("123Test").hasMatch());
     QVERIFY(!pattern.match("Test").hasMatch());
     QVERIFY(!pattern.match("123").hasMatch());
@@ -42,7 +42,7 @@ void TestMainWindow::testValidateInputEmpty()
 void TestMainWindow::testValidateInputMixedCase()
 {
     QRegularExpression pattern(R"(^[A-Za-z]+\d+$)");
-    
+
     QVERIFY(pattern.match("TeSt123").hasMatch());
     QVERIFY(pattern.match("aBcDeF999").hasMatch());
 }