better UI, +windows1251 encoding support

composeApp/src/jvmMain/kotlin/net/sergeych/toread/BookPlatform.jvm.kt

@@ -10,6 +10,7 @@ import net.sergeych.toread.storage.ReadingStateRecord
 import net.sergeych.toread.storage.jdbc.H2LibraryDatabase
 import net.sergeych.toread.storage.jdbc.LibraryScanner
 import org.jetbrains.skia.Image
+import java.awt.Desktop
 import java.awt.Toolkit
 import java.awt.datatransfer.DataFlavor
 import java.awt.datatransfer.Transferable
@@ -218,6 +219,24 @@ actual suspend fun markLibraryReadingStatus(fileId: String, status: BookReadingS
     }
 }
 
+actual suspend fun shareLibraryBookFile(fileId: String): Boolean = false
+
+actual suspend fun viewLibraryBookFile(fileId: String): Boolean = withContext(Dispatchers.IO) {
+    runCatching {
+        if (!Desktop.isDesktopSupported()) return@withContext false
+        val file = openLibraryDatabase().useLibrary { db ->
+            db.files.get(fileId)?.storageUri?.let(::File)?.takeIf { it.isFile }
+        } ?: return@withContext false
+        val desktop = Desktop.getDesktop()
+        if (desktop.isSupported(Desktop.Action.BROWSE_FILE_DIR)) {
+            desktop.browseFileDirectory(file)
+        } else {
+            desktop.open(file.parentFile ?: file)
+        }
+        true
+    }.getOrDefault(false)
+}
+
 actual suspend fun loadBookInfoExtras(fileId: String): BookInfoExtras = withContext(Dispatchers.IO) {
     openLibraryDatabase().useLibrary { db ->
         val file = db.files.get(fileId) ?: return@useLibrary BookInfoExtras()