feat: implement project management and media track handling

- Added domain entities for audio, subtitle, and video tracks.
- Created a Project entity to manage media editing sessions.
- Implemented value objects for file paths, sync offsets, track IDs, and languages.
- Developed infrastructure for asynchronous FFmpeg process execution.
- Built a user interface for selecting video files, adding audio and subtitle tracks, and managing output settings.
- Integrated error handling and logging for media processing tasks.

src/ui/components/add_audio_track_form.rs

@@ -0,0 +1,74 @@
+use eframe::egui;
+use crate::adapters::filesystem::FilePickerAdapter;
+use crate::domain::value_objects::{FilePath, SyncOffset, TrackLanguage};
+use crate::ui::components::{language_field::LanguageField, sync_offset_field::SyncOffsetField};
+
+/// Evento emitido ao confirmar adição de faixa de áudio.
+pub struct AddAudioTrackRequest {
+    pub path: FilePath,
+    pub offset: SyncOffset,
+    pub language: TrackLanguage,
+}
+
+/// Formulário para adicionar uma faixa de áudio externa.
+pub struct AddAudioTrackForm {
+    selected_path: Option<FilePath>,
+    offset_field: SyncOffsetField,
+    language_field: LanguageField,
+}
+
+impl AddAudioTrackForm {
+    pub fn new() -> Self {
+        AddAudioTrackForm {
+            selected_path: None,
+            offset_field: SyncOffsetField::new(SyncOffset::default()),
+            language_field: LanguageField::new(None),
+        }
+    }
+
+    /// Renderiza o formulário. Retorna `Some(request)` ao confirmar.
+    pub fn ui(&mut self, ui: &mut egui::Ui) -> Option<AddAudioTrackRequest> {
+        let mut result = None;
+
+        ui.group(|ui| {
+            ui.heading("Adicionar faixa de áudio");
+
+            ui.horizontal(|ui| {
+                let label = self
+                    .selected_path
+                    .as_ref()
+                    .map(|p| p.to_string_lossy().to_string())
+                    .unwrap_or_else(|| "Nenhum arquivo".to_string());
+                ui.label(&label);
+                if ui.button("Selecionar áudio…").clicked() {
+                    self.selected_path = FilePickerAdapter::pick_audio();
+                }
+            });
+
+            self.offset_field.ui(ui, "Atraso:");
+            self.language_field.ui(ui);
+
+            ui.add_space(4.0);
+
+            let can_add = self.selected_path.is_some();
+            if ui
+                .add_enabled(can_add, egui::Button::new("Adicionar"))
+                .clicked()
+            {
+                if let (Some(path), Some(offset), Some(language)) = (
+                    self.selected_path.clone(),
+                    self.offset_field.parse(),
+                    self.language_field.parse(),
+                ) {
+                    result = Some(AddAudioTrackRequest { path, offset, language });
+                    // Reset form
+                    self.selected_path = None;
+                    self.offset_field = SyncOffsetField::new(SyncOffset::default());
+                    self.language_field = LanguageField::new(None);
+                }
+            }
+        });
+
+        result
+    }
+}