style: apply prettier across fork files

check:prettier was not part of my gate routine, so formatting drift accumulated
across the session's touched files (and a few older ones). Run prettier --write
to bring the repo back to 'All matched files use Prettier code style!'.
Formatting only — no logic changes. tsc/tests/build all green.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/app/features/room/MediaGallery.tsx

@@ -1065,7 +1065,9 @@ export function MediaGallery({ room, onClose }: MediaGalleryProps) {
                       // Sanitize the mimetype the way MAudio does (e.g. application/ogg →
                       // audio/ogg) so the decrypted blob actually plays.
                       const mimeType = getBlobSafeMimeType(c.info?.mimetype ?? 'audio/ogg');
-                      const filename = body.includes('.') ? body : `${body}.${mimeTypeToExt(mimeType)}`;
+                      const filename = body.includes('.')
+                        ? body
+                        : `${body}.${mimeTypeToExt(mimeType)}`;
                       const waveform = (
                         c as unknown as { 'org.matrix.msc1767.audio'?: { waveform?: number[] } }
                       )['org.matrix.msc1767.audio']?.waveform;