fix: resolve mod build errors after upstream sync

- Update open-x4-sdk submodule to 9f76376 (BatteryMonitor ESP-IDF 5.x compat)
- Add RTC_NOINIT bounds check for logHead in Logging.cpp
- Add drawTextRotated90CCW to GfxRenderer for dictionary UI
- Add getWordXpos() accessor to TextBlock for dictionary word selection
- Fix bare include paths (ActivityResult.h, RenderLock.h) across 10 files
- Fix rvalue ref binding in setResult() lambdas (std::move pattern)
- Fix std::max type mismatch (uint8_t vs int) in EpubReaderActivity
- Fix FsFile forward declaration conflict in Dictionary.h
- Restore StringUtils::checkFileExtension() and sortFileList()
- Restore RecentBooksStore::removeBook()

Made-with: Cursor

src/activities/util/NumericStepperActivity.cpp

@@ -6,7 +6,7 @@
 #include <algorithm>
 #include <cstdio>
 
-#include "ActivityResult.h"
+#include "activities/ActivityResult.h"
 #include "MappedInputManager.h"
 #include "components/UITheme.h"
 #include "fontIds.h"