KindFlags refactor, indicator helpers, auto-padding, sizeof format fix

- Add KindFlags bitmask enum (KF_HexPreview, KF_Container, KF_String, KF_Vector)
- Add helper functions: isHexPreview(), flagsFor(), allTypeNamesForUI()
- Add editor helpers: clearIndicatorLine(), fillIndicatorCols(), resolvedSpanFor()
- Use SCI_FINDCOLUMN for UTF-8 safe column-to-position conversion
- Auto-emit hex padding nodes when changing type to smaller size
- Fix struct footer format: sizeof(Name)=0x... (no spaces)
- Add tests for sizeof recalculation after node deletion
- Add debug output to investigate sizeof refresh issue
- Replace icons.qrc with resources.qrc, add embedded fonts

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

CMakeLists.txt

@@ -19,7 +19,7 @@ add_executable(ReclassX
     src/controller.cpp
     src/compose.cpp
     src/format.cpp
-    src/icons.qrc
+    src/resources.qrc
 )
 
 target_include_directories(ReclassX PRIVATE src)
@@ -31,7 +31,7 @@ target_link_libraries(ReclassX PRIVATE
     dbghelp
 )
 
-add_custom_target(screenshot
+add_custom_target(screenshot ALL
     COMMAND ReclassX --screenshot ${CMAKE_BINARY_DIR}/screenshot.png
     DEPENDS ReclassX
     WORKING_DIRECTORY ${CMAKE_BINARY_DIR}