feat: adiciona suporte para sugestão de velocidade com base nas durações de vídeo e faixas de áudio/legenda

src/ui/app.rs

@@ -7,7 +7,7 @@ use crate::application::use_cases::{
     edit_existing_track_sync::EditExistingTrackSync, export_track::ExportTrack,
     load_media_info::LoadMediaInfo, remove_track::RemoveTrack,
 };
-use crate::domain::entities::{MkvOutput, Project, VideoFile};
+use crate::domain::entities::{MkvOutput, Project, TrackKind, VideoFile};
 use crate::domain::value_objects::FilePath;
 use crate::infrastructure::process::{run_ffmpeg_async, run_mkvmerge_async};
 use crate::ui::components::{
@@ -135,6 +135,12 @@ impl App {
                     Ok(_) => {
                         self.existing_track_list
                             .sync_tracks(&project.existing_tracks);
+                        // Propaga duração do vídeo para os formulários (sugestão de velocidade)
+                        let video_dur = project.existing_tracks.iter()
+                            .find(|t| matches!(t.kind, TrackKind::Video))
+                            .and_then(|t| t.duration_ms);
+                        self.add_audio_form.set_video_duration(video_dur);
+                        self.add_subtitle_form.set_video_duration(video_dur);
                     }
                     Err(e) => {
                         self.execution_panel.state = ExecutionState::Error(e.to_string());

src/ui/components/add_audio_track_form.rs

@@ -1,4 +1,7 @@
+use crate::adapters::ffmpeg::{FfprobeGateway};
 use crate::adapters::filesystem::FilePickerAdapter;
+use crate::application::ports::MediaInfoPort;
+use crate::domain::entities::TrackKind;
 use crate::domain::value_objects::{FilePath, SyncOffset, TrackLanguage};
 use crate::ui::components::{language_field::LanguageField, sync_offset_field::SyncOffsetField};
 use eframe::egui;
@@ -21,6 +24,10 @@ pub struct AddAudioTrackForm {
     language_field: LanguageField,
     is_default: bool,
     title_input: String,
+    /// Duração do vídeo base (ms) — definida por App após carregar o projeto.
+    pub video_duration_ms: Option<u64>,
+    /// Duração da faixa de áudio selecionada (ms) — obtida via ffprobe ao escolher o arquivo.
+    selected_duration_ms: Option<u64>,
 }
 
 impl AddAudioTrackForm {
@@ -31,9 +38,25 @@ impl AddAudioTrackForm {
             language_field: LanguageField::new(None),
             is_default: false,
             title_input: String::new(),
+            video_duration_ms: None,
+            selected_duration_ms: None,
         }
     }
 
+    /// Atualiza a duração do vídeo base e recalcula a sugestão de velocidade.
+    pub fn set_video_duration(&mut self, dur: Option<u64>) {
+        self.video_duration_ms = dur;
+        self.update_suggestion();
+    }
+
+    fn update_suggestion(&mut self) {
+        let suggestion = self.video_duration_ms
+            .zip(self.selected_duration_ms)
+            .filter(|(_, td)| *td > 0)
+            .map(|(vd, td)| vd as f64 / td as f64 * 100.0);
+        self.offset_field.set_suggestion(suggestion);
+    }
+
     /// Renderiza o formulário. Retorna `Some(request)` ao confirmar.
     pub fn ui(&mut self, ui: &mut egui::Ui, mkvmerge_available: bool) -> Option<AddAudioTrackRequest> {
         let mut result = None;
@@ -50,6 +73,15 @@ impl AddAudioTrackForm {
                 ui.label(&label);
                 if ui.button("Selecionar áudio…").clicked() {
                     self.selected_path = FilePickerAdapter::pick_audio();
+                    // Proba a duração do arquivo selecionado para sugestão de velocidade
+                    self.selected_duration_ms = self.selected_path.as_ref().and_then(|p| {
+                        let tracks = FfprobeGateway.probe(p).ok()?;
+                        tracks.iter()
+                            .find(|t| matches!(t.kind, TrackKind::Audio) && t.duration_ms.is_some())
+                            .or_else(|| tracks.iter().find(|t| t.duration_ms.is_some()))
+                            .and_then(|t| t.duration_ms)
+                    });
+                    self.update_suggestion();
                 }
             });
 
@@ -96,6 +128,8 @@ impl AddAudioTrackForm {
                     // Reset form
                     self.selected_path = None;
                     self.offset_field = SyncOffsetField::new(SyncOffset::default());
+                    self.selected_duration_ms = None;
+                    self.update_suggestion();
                     self.language_field = LanguageField::new(None);
                     self.is_default = false;
                     self.title_input = String::new();

src/ui/components/add_subtitle_form.rs

@@ -1,4 +1,7 @@
+use crate::adapters::ffmpeg::FfprobeGateway;
 use crate::adapters::filesystem::FilePickerAdapter;
+use crate::application::ports::MediaInfoPort;
+use crate::domain::entities::TrackKind;
 use crate::domain::value_objects::{FilePath, SyncOffset, TrackLanguage};
 use crate::ui::components::{language_field::LanguageField, sync_offset_field::SyncOffsetField};
 use eframe::egui;
@@ -21,6 +24,10 @@ pub struct AddSubtitleForm {
     language_field: LanguageField,
     is_default: bool,
     title_input: String,
+    /// Duração do vídeo base (ms) — definida por App após carregar o projeto.
+    pub video_duration_ms: Option<u64>,
+    /// Duração da legenda selecionada (ms) — obtida via ffprobe ao escolher o arquivo.
+    selected_duration_ms: Option<u64>,
 }
 
 impl AddSubtitleForm {
@@ -31,9 +38,25 @@ impl AddSubtitleForm {
             language_field: LanguageField::new(None),
             is_default: false,
             title_input: String::new(),
+            video_duration_ms: None,
+            selected_duration_ms: None,
         }
     }
 
+    /// Atualiza a duração do vídeo base e recalcula a sugestão de velocidade.
+    pub fn set_video_duration(&mut self, dur: Option<u64>) {
+        self.video_duration_ms = dur;
+        self.update_suggestion();
+    }
+
+    fn update_suggestion(&mut self) {
+        let suggestion = self.video_duration_ms
+            .zip(self.selected_duration_ms)
+            .filter(|(_, td)| *td > 0)
+            .map(|(vd, td)| vd as f64 / td as f64 * 100.0);
+        self.offset_field.set_suggestion(suggestion);
+    }
+
     /// Renderiza o formulário. Retorna `Some(request)` ao confirmar.
     pub fn ui(&mut self, ui: &mut egui::Ui, mkvmerge_available: bool) -> Option<AddSubtitleRequest> {
         let mut result = None;
@@ -50,6 +73,15 @@ impl AddSubtitleForm {
                 ui.label(&label);
                 if ui.button("Selecionar legenda…").clicked() {
                     self.selected_path = FilePickerAdapter::pick_subtitle();
+                    // Proba a duração do arquivo selecionado para sugestão de velocidade
+                    self.selected_duration_ms = self.selected_path.as_ref().and_then(|p| {
+                        let tracks = FfprobeGateway.probe(p).ok()?;
+                        tracks.iter()
+                            .find(|t| matches!(t.kind, TrackKind::Subtitle) && t.duration_ms.is_some())
+                            .or_else(|| tracks.iter().find(|t| t.duration_ms.is_some()))
+                            .and_then(|t| t.duration_ms)
+                    });
+                    self.update_suggestion();
                 }
             });
 
@@ -94,6 +126,8 @@ impl AddSubtitleForm {
                     });
                     self.selected_path = None;
                     self.offset_field = SyncOffsetField::new(SyncOffset::default());
+                    self.selected_duration_ms = None;
+                    self.update_suggestion();
                     self.language_field = LanguageField::new(None);
                     self.is_default = false;
                     self.title_input = String::new();

src/ui/components/existing_track_list.rs

@@ -59,6 +59,11 @@ impl ExistingTrackList {
                 return;
             }
 
+            // Duração do vídeo base para sugestão de velocidade
+            let video_duration_ms = tracks.iter()
+                .find(|t| matches!(t.kind, TrackKind::Video))
+                .and_then(|t| t.duration_ms);
+
             let num_cols = if mkvmerge_available { 7 } else { 6 };
             egui::Grid::new("existing_tracks_grid")
                 .num_columns(num_cols)
@@ -115,14 +120,59 @@ impl ExistingTrackList {
                         // Drift field (somente para áudio e legenda quando mkvmerge disponível)
                         if mkvmerge_available {
                             if editable {
+                                let suggestion_pct = video_duration_ms
+                                    .zip(track.duration_ms)
+                                    .filter(|(_, td)| *td > 0)
+                                    .map(|(vd, td)| vd as f64 / td as f64 * 100.0);
+
                                 let drift_raw = self
                                     .drift_fields
                                     .entry(track.id.val())
                                     .or_insert_with(|| format!("{:.5}", track.drift_scale * 100.0));
+
+                                let mut text_changed = false;
+                                let mut suggestion_applied: Option<f64> = None;
+
+                                ui.horizontal(|ui| {
                                     let resp = ui.add(
-                                    egui::TextEdit::singleline(drift_raw).desired_width(80.0),
+                                        egui::TextEdit::singleline(drift_raw).desired_width(72.0),
                                     );
-                                if resp.changed() {
+                                    text_changed = resp.changed();
+
+                                    if let Some(pct) = suggestion_pct {
+                                        let warn = (pct - 100.0).abs() > 0.5;
+                                        let hover = format!(
+                                            "Sugerido: {:.3}%{}",
+                                            pct,
+                                            if warn {
+                                                "\n⚠ Diferença >0.5% — verifique se é o mesmo conteúdo"
+                                            } else {
+                                                " — clique para aplicar"
+                                            }
+                                        );
+                                        let color = if warn {
+                                            egui::Color32::from_rgb(255, 160, 0)
+                                        } else {
+                                            egui::Color32::from_rgb(80, 180, 80)
+                                        };
+                                        if ui
+                                            .add(egui::Button::new(
+                                                egui::RichText::new("💡").color(color).small(),
+                                            ))
+                                            .on_hover_text(hover)
+                                            .clicked()
+                                        {
+                                            suggestion_applied = Some(pct);
+                                        }
+                                    }
+                                });
+
+                                if let Some(pct) = suggestion_applied {
+                                    *drift_raw = format!("{:.3}", pct);
+                                    events.push(ExistingTrackEvent::DriftChanged(
+                                        track.id, pct / 100.0,
+                                    ));
+                                } else if text_changed {
                                     if let Ok(pct) = drift_raw.trim().parse::<f64>() {
                                         if pct >= 1.0 && pct <= 999.99 {
                                             let scale = pct / 100.0;

src/ui/components/sync_offset_field.rs

@@ -10,6 +10,8 @@ pub struct SyncOffsetField {
     /// Percentual de velocidade original (ex: "99.983" → scale 0.99983). Padrão: "100.00".
     pub drift_raw: String,
     drift_error: Option<String>,
+    /// Velocidade sugerida calculada externamente (% inteiro). Exibida como botão 💡.
+    suggestion_pct: Option<f64>,
 }
 
 impl SyncOffsetField {
@@ -20,9 +22,16 @@ impl SyncOffsetField {
             error: None,
             drift_raw: "100.00".to_string(),
             drift_error: None,
+            suggestion_pct: None,
         }
     }
 
+    /// Define a velocidade sugerida (%) calculada a partir das durações do vídeo e da faixa.
+    /// `None` remove o botão de sugestão.
+    pub fn set_suggestion(&mut self, pct: Option<f64>) {
+        self.suggestion_pct = pct;
+    }
+
     /// Renderiza o campo de offset (sem o campo de drift).
     pub fn ui(&mut self, ui: &mut egui::Ui, label: &str) -> bool {
         let mut changed = false;
@@ -60,6 +69,35 @@ impl SyncOffsetField {
                     "Instale MKVToolNix para usar correção de drift de velocidade.",
                 );
             }
+            // Botão de sugestão calculada a partir das durações
+            if mkvmerge_available {
+                if let Some(pct) = self.suggestion_pct {
+                    let warn = (pct - 100.0).abs() > 0.5;
+                    let hover = format!(
+                        "Velocidade sugerida: {:.3}%{}",
+                        pct,
+                        if warn {
+                            "\n⚠ Diferença >0.5% — verifique se é o mesmo conteúdo"
+                        } else {
+                            " — clique para aplicar"
+                        }
+                    );
+                    let color = if warn {
+                        egui::Color32::from_rgb(255, 160, 0)
+                    } else {
+                        egui::Color32::from_rgb(80, 180, 80)
+                    };
+                    if ui
+                        .add(egui::Button::new(
+                            egui::RichText::new("💡").color(color).small(),
+                        ))
+                        .on_hover_text(hover)
+                        .clicked()
+                    {
+                        self.drift_raw = format!("{:.3}", pct);
+                    }
+                }
+            }
             if let Ok(pct) = self.drift_raw.trim().parse::<f64>() {
                 if (pct - 100.0).abs() > 0.001 {
                     ui.colored_label(