fix(android): FileOpenerModule — kein '*/*' im Source (Kotlin-Lexer-Verwirrung)

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

android/android/app/src/main/java/com/ariacockpit/FileOpenerModule.kt

@@ -16,7 +16,7 @@ import java.io.File
  * Android 7+ (content:// statt file://) das URI lesen darf.
  *
  * MIME-Type wird vom Caller bestimmt — App-Auswahl ist davon abhaengig (PDF
- * → PDF-Viewer, image/* → Galerie, etc.).
+ * geht an PDF-Viewer, image/jpeg an Galerie, etc.).
  */
 class FileOpenerModule(reactContext: ReactApplicationContext) : ReactContextBaseJavaModule(reactContext) {
     override fun getName() = "FileOpener"
@@ -36,8 +36,9 @@ class FileOpenerModule(reactContext: ReactApplicationContext) : ReactContextBase
             } else {
                 Uri.fromFile(file)
             }
+            val safeMime = if (mimeType.isBlank()) "application/octet-stream" else mimeType
             val intent = Intent(Intent.ACTION_VIEW).apply {
-                setDataAndType(uri, mimeType.ifBlank { "*/*" })
+                setDataAndType(uri, safeMime)
                 addFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
                 addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION)
             }