feat(commands): set audio_layout at each finalize/export site (summed for now) (FR-SPK)

src-tauri/src/commands.rs

@@ -866,6 +866,9 @@ pub async fn stop_recording(
                 language,
                 backend_used: Some(backend_used),
                 model_used: Some(session.model_id.clone()),
+                // Set to "split"/"summed" once the split writer lands (next
+                // stage); until then every recording is summed (NULL default).
+                audio_layout: None,
             },
         )
         .await
@@ -1978,6 +1981,7 @@ pub async fn reprocess_transcript(
                 language: resolved_language,
                 backend_used: Some(backend.as_str().to_string()),
                 model_used: Some(model),
+                audio_layout: None, // reprocess preserves the recorded layout
             },
         )
         .await
@@ -2139,6 +2143,7 @@ pub async fn import_media(
                 language: resolved_language,
                 backend_used: Some(backend.as_str().to_string()),
                 model_used: Some(model_id.clone()),
+                audio_layout: Some("summed".to_string()), // single-source import
             },
         )
         .await
@@ -2253,6 +2258,7 @@ pub async fn resume_transcription(
                 language: resolved_language,
                 backend_used: Some(BackendId::Cpu.as_str().to_string()),
                 model_used: Some(model_id),
+                audio_layout: None, // recovery preserves the recorded layout
             },
         )
         .await
@@ -2672,6 +2678,7 @@ async fn import_one_bundle(state: &State<'_, AppState>, dir: &Path) -> WaResult<
                 language: bundle.language.clone(),
                 backend_used: bundle.backend_used.clone(),
                 model_used: bundle.model_used.clone(),
+                audio_layout: bundle.audio_layout.clone(),
             },
         )
         .await
@@ -2847,6 +2854,9 @@ async fn export_meeting_to(
                 tags: meeting.tags.clone(),
                 speakers: meeting.speakers.clone(),
                 action_items: meeting.action_items.clone(),
+                // Export downmixes a split recording to dual-mono below, so the
+                // shared copy is a normal "summed" file (FR-STORE-4).
+                audio_layout: Some("summed".to_string()),
             };
             let manifest = serde_json::to_string_pretty(&bundle)
                 .map_err(|e| WaError::new("export", e.to_string()))?;
@@ -5051,6 +5061,7 @@ mod tests {
             language: None,
             backend_used: None,
             model_used: None,
+            audio_layout: None,
             segments: Vec::new(),
             speakers: vec![
                 SpeakerInfo {
@@ -5335,6 +5346,7 @@ mod tests {
                     language: None,
                     backend_used: None,
                     model_used: None,
+                    audio_layout: None,
                 },
             )
             .await