feat: derive course durations from video media

services/db.ts

@@ -64,6 +64,12 @@ const toDuration = (seconds: number | null) => {
   return minutes >= 60 ? `${Math.floor(minutes / 60)}h ${minutes % 60}m` : `${minutes}m`;
 };
 
+const toCourseDuration = (lessons: ApiCourse['lessons']) => {
+  const seconds = lessons.reduce((total, lesson) => total + (lesson.media[0]?.durationSeconds ?? lesson.durationSeconds ?? 0), 0);
+  if (seconds) return toDuration(seconds);
+  return lessons.length ? 'Processando' : '—';
+};
+
 const toCourse = (course: ApiCourse): Course => ({
   id: course.id,
   title: course.title,
@@ -77,7 +83,7 @@ const toCourse = (course: ApiCourse): Course => ({
   status: course.status === 'draft' ? 'draft' : 'published',
   progress: course.progress,
   lastActivity: course.lastActivity || undefined,
-  duration: `${course.lessons.length} Aulas`,
+  duration: toCourseDuration(course.lessons),
   lessons: course.lessons.map((lesson): Lesson => {
     const media: LessonMedia[] = lesson.media.map((item) => ({
       id: item.id,
@@ -92,7 +98,7 @@ const toCourse = (course: ApiCourse): Course => ({
       id: lesson.id,
       title: lesson.title,
       description: lesson.description,
-      duration: toDuration(lesson.durationSeconds),
+      duration: toDuration(media[0]?.durationSeconds ?? lesson.durationSeconds),
       isFree: lesson.accessLevel === 'public',
       videoUrl: media[0]?.playbackUrl || media[0]?.embedUrl || '',
       mediaProvider: media[0]?.provider,
@@ -139,7 +145,7 @@ const toCoursePayload = (course: Course) => ({
     id: /^[0-9a-f]{8}-[0-9a-f-]{27}$/i.test(lesson.id) ? lesson.id : undefined,
     title: lesson.title,
     description: lesson.description || '',
-    durationSeconds: toSeconds(lesson.duration),
+    durationSeconds: lesson.media?.[0]?.durationSeconds ?? toSeconds(lesson.duration),
     accessLevel: lesson.isFree ? 'public' as const : 'enrolled' as const,
     media: lesson.media?.length
       ? lesson.media.map((media) => ({