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/reader/EpubReaderActivity.cpp

@@ -717,7 +717,7 @@ bool EpubReaderActivity::silentIndexNextChapterIfNeeded() {
   marginTop += SETTINGS.screenMargin;
   marginLeft += SETTINGS.screenMargin;
   marginRight += SETTINGS.screenMargin;
-  marginBottom += std::max(SETTINGS.screenMargin, UITheme::getInstance().getStatusBarHeight());
+  marginBottom += std::max(static_cast<int>(SETTINGS.screenMargin), UITheme::getInstance().getStatusBarHeight());
   const uint16_t vpWidth = renderer.getScreenWidth() - marginLeft - marginRight;
   const uint16_t vpHeight = renderer.getScreenHeight() - marginTop - marginBottom;