fix(backup): Improve error handling for word list import

This commit enhances the error handling for the word list import feature.

Previously, importing a word list from a file did not handle potential exceptions, such as file read errors or the inability to open the selected file.

Now, the file import logic is wrapped in a `try-catch` block to gracefully handle any exceptions during the process. Additionally, it uses a `use` block to ensure the `InputStream` is automatically closed. If an error occurs, a "Failed to restore words" message is displayed to the user. A check is also added to show an "Unable to open file" message if the `ContentResolver` fails to provide an `InputStream`.

Author: CreativeCodeCat

app/src/main/java/com/github/droidworksstudio/mlauncher/MainActivity.kt

@@ -311,10 +311,16 @@ class MainActivity : AppCompatActivity() {
             if (result.resultCode == RESULT_OK) {
                 result.data?.data?.let { uri ->
                     // Handle the imported file
-                    val inputStream = contentResolver.openInputStream(uri)
-                    val importedWords = readWordsFromFile(inputStream)
-                    saveCustomWordList(importedWords)
-                    AppReloader.restartApp(applicationContext)
+                    try {
+                        contentResolver.openInputStream(uri)?.use { inputStream ->
+                            val importedWords = readWordsFromFile(inputStream)
+                            saveCustomWordList(importedWords)
+                            AppReloader.restartApp(applicationContext)
+                        } ?: showLongToast("Unable to open file")
+                    } catch (e: Exception) {
+                        e.printStackTrace()
+                        showLongToast("Failed to restore words")
+                    }
                 }
             }
         }