Update MIGRATION_STATUS.md with Session 023: Lts/Tools QRegExp migration

- Documented complete QRegExp → QRegularExpression migration in Lts/Tools
- 7 files updated with Qt6-compatible regex patterns
- Core5Compat added for QTextCodec support in TextEditorTest
- Zero QRegExp instances remaining in Lts/Tools module

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Entire-Checkpoint: 01M0WE1S8MR1K59FMME9HHSA2S

MIGRATION_STATUS.md

@@ -1,5 +1,50 @@
 # Qt5/C++11 → Qt6/C++17 Migration Status
 
+## Session 023: Lts/Tools QRegExp Migration Complete (2026-08-24)
+
+### ✅ QRegExp → QRegularExpression Migration in Lts/Tools
+
+Completed migration of all QRegExp usage to QRegularExpression in Lts/Tools module:
+
+**Files Updated:**
+1. **Lts/Tools/DdsView/detailview.cpp**
+   - Line 636: QRegExp → QRegularExpression (name pattern matching)
+
+2. **Lts/Tools/DdsView/sequences/abstractsequencewidget.cpp**
+   - Line 167: QRegExp → QRegularExpression (object name replacement)
+   - Added `#include <QRegularExpression>`
+
+3. **Lts/Tools/VapixConfig/httprequesthandler.cpp**
+   - Lines 68, 95, 136: QRegExp → QRegularExpression (string splitting)
+
+4. **Lts/Tools/ConfigX/configurator.cpp**
+   - QRegExp → QRegularExpression migration
+
+5. **Lts/Tools/LogViewer/sortfiltermodel.cpp**
+   - QRegExp → QRegularExpression migration
+
+6. **Lts/Tools/SqlBrowser/BrowserWnd.cpp**
+   - QRegExp → QRegularExpression migration
+
+7. **Lts/Tools/TextEditorTest/CMakeLists.txt**
+   - Added `Qt6::Core5Compat` for QTextCodec support (Qt::codecForHtml)
+
+**Migration Pattern Applied:**
+- `QRegExp(pattern)` → `QRegularExpression(pattern)`
+- `QRegExp(pattern, Qt::CaseInsensitive, QRegExp::Wildcard)` → `QRegularExpression(QRegularExpression::wildcardToRegularExpression(pattern), QRegularExpression::CaseInsensitiveOption)`
+- `QRegExp(string, Qt::CaseInsensitive, QRegExp::FixedString)` → `QRegularExpression(QRegularExpression::escape(string), QRegularExpression::CaseInsensitiveOption)`
+
+**Verification:**
+- ✅ Zero QRegExp instances remaining in Lts/Tools
+- ✅ All files compile with Qt6
+- ✅ Core5Compat added where QTextCodec is required
+
+**Commits:**
+- Submodule: 71636a42c (Lts/Tools: Complete QRegExp to QRegularExpression migration)
+- Main repo: f4ecc34e (Update qt-migration-legatus submodule)
+
+---
+
 ## Session 022: Lts/Tools Module Migration Complete (2026-08-24)
 
 ### ✅ Lts/Tools (72 Submodules) Migrated