Some fixes for cover generation

src/activities/home/HomeActivity.cpp

@@ -217,6 +217,11 @@ void HomeActivity::loadRecentCovers(int coverHeight) {
           RECENT_BOOKS.updateBook(book.path, book.title, book.author, book.series, "");
           book.coverBmpPath = "";
         } else {
+          // Free the carousel frame cache before converting — PNG/JPEG decode needs ~42 KB
+          // contiguous heap, which won't be available while the 48 KB frame buffer is held.
+          // The cache will be rebuilt on the next render.
+          UITheme::getInstance().getMutableTheme().invalidateFrameCache();
+
           const std::string cacheBase = "/.crosspoint/sidecar_" + std::to_string(std::hash<std::string>{}(book.path));
           const std::string placeholder = cacheBase + "/[HEIGHT].bmp";
           bool success = true;
@@ -239,8 +244,8 @@ void HomeActivity::loadRecentCovers(int coverHeight) {
             book.coverBmpPath = placeholder;
           } else {
             LOG_ERR("HOME", "Failed to convert sidecar cover for %s", book.path.c_str());
-            RECENT_BOOKS.updateBook(book.path, book.title, book.author, book.series, "");
-            book.coverBmpPath = "";
+            // Don't permanently clear the path on failure — keep the raw sidecar path
+            // so the next home visit can retry (e.g. after more memory becomes available).
           }
           coverRendered = false;
           nextRecentCoverIndex++;

src/activities/reader/ReaderActivity.cpp

@@ -62,13 +62,11 @@ std::string ReaderActivity::sidecarCoverPath(const std::string& bookPath) {
   const std::string base = bookPath.substr(0, dot);
   for (const char* ext : {".jpg", ".jpeg", ".png", ".bmp"}) {
     const std::string candidate = base + ext;
-    LOG_DBG("SIDECAR", "Checking: %s", candidate.c_str());
     if (Storage.exists(candidate.c_str())) {
       LOG_DBG("SIDECAR", "Found sidecar cover: %s", candidate.c_str());
       return candidate;
     }
   }
-  LOG_DBG("SIDECAR", "No sidecar found for: %s", bookPath.c_str());
   return "";
 }
 

src/components/themes/lyra/Lyra3CoversTheme.cpp

@@ -52,7 +52,7 @@ void Lyra3CoversTheme::drawRecentBookCover(GfxRenderer& renderer, Rect rect, con
               const float ratio = bitmapWidth / bitmapHeight;
               const float tileRatio =
                   static_cast<float>(tileWidth - 2 * hPaddingInSelection) / static_cast<float>(coverHeight);
-              const float cropX = 1.0f - (tileRatio / ratio);
+              const float cropX = std::max(0.0f, 1.0f - (tileRatio / ratio));
 
               renderer.drawBitmap(bitmap, tileX + hPaddingInSelection, tileY + hPaddingInSelection,
                                   tileWidth - 2 * hPaddingInSelection, coverHeight, cropX);