Merge branch 'main' into copilot/fix-xcf-attachments-crash

XCF files with MIME type image/x-xcf (or similar non-standard image types)
cause a crash when exported because Android's MediaStore only accepts
standard image formats.

Added isMediaStoreImageType() helper to check if MIME type is a standard
image format (JPEG, PNG, GIF, WebP, BMP, HEIC, HEIF, AVIF). Non-standard
image types like XCF and PSD are now saved to Downloads instead.

Fixes: XCF attachments crash issue

Co-authored-by: adbenitez <24558636+adbenitez@users.noreply.github.com>

src/main/java/org/thoughtcrime/securesms/util/SaveAttachmentTask.java

@@ -152,13 +152,34 @@ public class SaveAttachmentTask extends ProgressDialogAsyncTask<SaveAttachmentTa
       return StorageUtil.getVideoUri();
     } else if (contentType.startsWith("audio/")) {
       return StorageUtil.getAudioUri();
-    } else if (contentType.startsWith("image/")) {
+    } else if (isMediaStoreImageType(contentType)) {
       return StorageUtil.getImageUri();
     } else {
       return StorageUtil.getDownloadUri();
     }
   }
 
+  /**
+   * Checks if the content type is a standard image format supported by Android's MediaStore.
+   * Non-standard image formats (like XCF, PSD, etc.) should be saved to Downloads instead.
+   */
+  private boolean isMediaStoreImageType(@NonNull String contentType) {
+    if (!contentType.startsWith("image/")) {
+      return false;
+    }
+    // Standard image formats supported by Android MediaStore
+    // Note: image/jpg is non-standard but included for compatibility with systems that use it
+    return contentType.equals("image/jpeg") ||
+           contentType.equals("image/jpg") ||
+           contentType.equals("image/png") ||
+           contentType.equals("image/gif") ||
+           contentType.equals("image/webp") ||
+           contentType.equals("image/bmp") ||
+           contentType.equals("image/heic") ||
+           contentType.equals("image/heif") ||
+           contentType.equals("image/avif");
+  }
+
   private @Nullable File ensureExternalPath(@Nullable File path) {
     if (path != null && path.exists()) {
       return path;
@@ -197,7 +218,7 @@ public class SaveAttachmentTask extends ProgressDialogAsyncTask<SaveAttachmentTa
       storage = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_MOVIES);
     } else if (contentType.startsWith("audio/")) {
       storage = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_MUSIC);
-    } else if (contentType.startsWith("image/")) {
+    } else if (isMediaStoreImageType(contentType)) {
       storage = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES);
     }