Merge pull request #1568 from qyo123oyq/fix/bookshelf-manual-sort

fix(bookshelf): improve manual sort drag visual feedback and selection handling

app/src/main/java/io/legado/app/ui/main/bookshelf/BookshelfScreen.kt

@@ -85,6 +85,7 @@ import androidx.compose.runtime.setValue
 import androidx.compose.runtime.snapshotFlow
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.graphicsLayer
 import androidx.compose.ui.hapticfeedback.HapticFeedbackType
 import androidx.compose.ui.input.nestedscroll.nestedScroll
 import androidx.compose.ui.platform.ClipEntry
@@ -1355,10 +1356,11 @@ fun BookshelfPage(
                     state = reorderableState,
                     key = bookUi.book.bookUrl,
                     enabled = canReorderBooks
-                ) {
+                ) { isDragging ->
                     BookItem(
                         bookUi = bookUi,
-                        modifier = Modifier.then(
+                        modifier = Modifier
+                            .then(
                                 if (canReorderBooks) {
                                     Modifier.longPressDraggableHandle(
                                         onDragStarted = {
@@ -1376,7 +1378,10 @@ fun BookshelfPage(
                                 } else {
                                     Modifier
                                 }
-                        ),
+                            )
+                            .graphicsLayer {
+                                alpha = if (isDragging) 0.5f else 1f
+                            },
                         layoutMode = bookshelfLayoutMode,
                         isSelected = isSelected,
                         gridStyle = bookItemGridStyle,