feat: adiciona funcionalidade de remoção de faixas externas e atualiza o layout da UI

src/application/use_cases/remove_track.rs

@@ -0,0 +1,54 @@
+use crate::domain::entities::Project;
+use crate::domain::value_objects::TrackId;
+use anyhow::{Result, anyhow};
+
+/// Remove uma faixa externa do projeto pelo seu TrackId.
+pub struct RemoveTrack;
+
+impl RemoveTrack {
+    pub fn execute(project: &mut Project, id: TrackId) -> Result<()> {
+        if project.remove_track(id) {
+            Ok(())
+        } else {
+            Err(anyhow!("Faixa com id {:?} não encontrada.", id))
+        }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use crate::domain::entities::{AudioTrack, MkvOutput, Project, Track, VideoFile};
+    use crate::domain::value_objects::{FilePath, SyncOffset, TrackId, TrackLanguage};
+
+    fn make_project() -> Project {
+        Project::new(
+            VideoFile::new(FilePath::from("input.mkv")),
+            MkvOutput::new(FilePath::from("output.mkv")),
+        )
+        .unwrap()
+    }
+
+    #[test]
+    fn remove_faixa_existente() {
+        let mut project = make_project();
+        let id = project.next_track_id();
+        project.tracks.push(Track::Audio(AudioTrack::new(
+            id,
+            FilePath::from("audio.aac"),
+            SyncOffset::from_ms(0),
+            TrackLanguage::new("por").unwrap(),
+        )));
+        assert_eq!(project.tracks.len(), 1);
+
+        RemoveTrack::execute(&mut project, id).unwrap();
+        assert!(project.tracks.is_empty());
+    }
+
+    #[test]
+    fn erro_se_id_inexistente() {
+        let mut project = make_project();
+        let result = RemoveTrack::execute(&mut project, TrackId::new(99));
+        assert!(result.is_err());
+    }
+}