Update MIGRATION_STATUS.md: Add Lts/Application module completion

- Added Lts/Application to module status table (✅ Complete)
- Added commit 45eb8ee6 to submodule commit history
- Documents 68 files migrated with Qt6 CMakeLists.txt updates

Entire-Checkpoint: 01M0WB5S866CNK751F84YY5Q26

MIGRATION_STATUS.md

@@ -1,9 +1,40 @@
 # Qt5/C++11 → Qt6/C++17 Migration Status
 
-## Session 018: SIGNAL/SLOT Migration Progress (2026-08-24)
+## Session 018: Application Module Migration Complete (2026-08-24)
 
 ### ✅ Completed Work
 
+#### Lts/Application Module Migration
+Migrated entire Lts/Application module from qt5-before to qt6-after with CMakeLists.txt updates:
+
+**Files Added (68 files):**
+- **Lts/Application/AarApp/** - AAR application module
+- **Lts/Application/OpApp/** - Operations application module  
+- **Lts/Application/THP/** - THP application module
+- All submodules with full source trees
+
+**CMakeLists.txt Updates:**
+All CMakeLists.txt files updated to use Qt6:: libraries:
+- Qt5::Core → Qt6::Core
+- Qt5::Widgets → Qt6::Widgets
+- Qt5::Xml → Qt6::Xml
+- Qt5::Gui → Qt6::Gui
+- Qt5::Network → Qt6::Network
+- Qt5::PrintSupport → Qt6::PrintSupport
+- Qt5::Svg → Qt6::Svg
+- Qt5::WebEngineCore → Qt6::WebEngineCore
+- Qt5::WebEngineWidgets → Qt6::WebEngineWidgets
+
+**Qt5 Deprecated API Scan Results:**
+- ✅ No SIGNAL/SLOT macros found (clean)
+- ✅ No QRegExp usage found (clean)
+- ✅ No QDesktopWidget usage found (clean)
+- ✅ No QTextCodec usage found (clean)
+
+**Commits:**
+- Submodule: 45eb8ee68 (Add Lts/Application module with Qt6 CMakeLists)
+- Main repo: 58fecf50 (Update submodule reference to 45eb8ee6)
+
 #### SIGNAL/SLOT Syntax Migration - Phase 2
 Migrated additional SIGNAL/SLOT connections to function-pointer syntax for Qt6 compatibility:
 
@@ -145,6 +176,7 @@ Fixed all compilation errors preventing BUILD_RTI=OFF configuration from buildin
 | Component | Status | BUILD_RTI=OFF | BUILD_RTI=ON | Notes |
 |-----------|--------|---------------|--------------|-------|
 | Lts/Common | ✅ Complete | ✅ Pass | ✅ Pass | All tests passing |
+| Lts/Application | ✅ Complete | ⏳ Pending | ⏳ Pending | 68 files migrated, CMakeLists.txt Qt6 updated |
 | Lts/DDS | ✅ Complete | ✅ Pass | ⏳ Pending | RTI integration ready |
 | Lts/Proxies | 🟡 In Progress | ✅ Pass | ⏳ Pending | TrainingAreaBase fixed, QRegExp migrated |
 | Lts/Services | 🟡 In Progress | ✅ Pass | ⏳ Pending | VideoOverlayManagement fixed, QRegExp migrated |
@@ -162,6 +194,12 @@ Fixed all compilation errors preventing BUILD_RTI=OFF configuration from buildin
 ### 📝 Commits
 
 #### qt-migration-legatus (submodule)
+- **Commit 45eb8ee6**: Lts/Application module migration complete
+  - Copied entire Application module from qt5-before (68 files)
+  - AarApp, OpApp, THP submodules included
+  - All CMakeLists.txt updated to Qt6::Core/Widgets/Xml/Gui/Network/PrintSupport/Svg/WebEngineCore/WebEngineWidgets
+  - No Qt5 deprecated APIs found in source code (clean)
+
 - **Commit 079175a0**: SIGNAL/SLOT migration: topic_editor.cpp
   - Migrated doubleClicked signal to function-pointer syntax
   - Updated select slot to function-pointer syntax