chore: post-sync cleanup and clang-format

- Remove stale Lyra3CoversTheme.h (functionality merged into LyraTheme)
- Fix UITheme.cpp to use LyraTheme for LYRA_3_COVERS theme variant
- Update open-x4-sdk submodule to 91e7e2b (drawImageTransparent support)
- Run clang-format on all source files

Co-authored-by: Cursor <cursoragent@cursor.com>

lib/hal/HalDisplay.h

@@ -37,8 +37,8 @@ class HalDisplay {
   void refreshDisplay(RefreshMode mode = RefreshMode::FAST_REFRESH, bool turnOffScreen = false);
 
   // EXPERIMENTAL: Display only a rectangular region
-  void displayWindow(uint16_t x, uint16_t y, uint16_t w, uint16_t h,
-                     RefreshMode mode = RefreshMode::FAST_REFRESH, bool turnOffScreen = false);
+  void displayWindow(uint16_t x, uint16_t y, uint16_t w, uint16_t h, RefreshMode mode = RefreshMode::FAST_REFRESH,
+                     bool turnOffScreen = false);
 
   // Power management
   void deepSleep();