style: Pint 포맷팅 적용

app/Services/Video/BgmService.php

@@ -264,14 +264,14 @@ public function generateAmbient(string $mood, int $durationSec, string $savePath
         foreach ($chords as $i => $freq) {
             $vol = 0.06 - ($i * 0.01); // 각 음의 볼륨을 점차 줄여 자연스럽게
             $modFreq = 0.08 + ($i * 0.03); // 각 음의 떨림 속도를 다르게
-            $expr .= ($expr ? ' + ' : '') . "{$vol}*sin({$freq}*2*PI*t)*((0.5+0.5*sin({$modFreq}*2*PI*t)))";
+            $expr .= ($expr ? ' + ' : '')."{$vol}*sin({$freq}*2*PI*t)*((0.5+0.5*sin({$modFreq}*2*PI*t)))";
         }
 
         // 페이드인(3초) + 페이드아웃(3초) 추가
         $cmd = sprintf(
             'ffmpeg -y -f lavfi -i "aevalsrc=%s:s=44100:d=%d" '
-            . '-af "lowpass=f=1500,highpass=f=80,afade=t=in:d=3,afade=t=out:st=%d:d=3" '
-            . '-c:a libmp3lame -q:a 4 %s 2>&1',
+            .'-af "lowpass=f=1500,highpass=f=80,afade=t=in:d=3,afade=t=out:st=%d:d=3" '
+            .'-c:a libmp3lame -q:a 4 %s 2>&1',
             escapeshellarg($expr),
             $durationSec + 2, // 페이드아웃 여유분
             max(0, $durationSec - 2),