feat: add transcription diagnostics for empty result bug

src-tauri/src/transcription/crispasr.rs

@@ -78,6 +78,23 @@ impl Transcriber for CrispAsrTranscriber {
             backend: "crispasr".to_string(),
             model_id: input.options.model_id,
             detected_language: input.options.language,
+            attempt: Some(crate::diagnostics::TranscriptionAttempt {
+                stage: "ok".to_string(),
+                audio_path: input.audio_path.clone(),
+                audio_size_bytes: crate::diagnostics::record_audio_size(&input.audio_path),
+                sidecar: sidecar_name.clone(),
+                model: model_path.display().to_string(),
+                exit_code: output.status.code(),
+                stdout_tail: crate::diagnostics::tail(
+                    &String::from_utf8_lossy(&output.stdout),
+                    1024,
+                ),
+                stderr_tail: crate::diagnostics::tail(
+                    &String::from_utf8_lossy(&output.stderr),
+                    1024,
+                ),
+                error: None,
+            }),
         })
     }
 }

src-tauri/src/transcription/mod.rs

@@ -2,6 +2,7 @@ use std::path::PathBuf;
 
 use serde::{Deserialize, Serialize};
 
+use crate::diagnostics::TranscriptionAttempt;
 use crate::error::AppResult;
 use crate::models::DEFAULT_MODEL_ID;
 
@@ -40,6 +41,8 @@ pub struct TranscriptionResult {
     pub backend: String,
     pub model_id: String,
     pub detected_language: Option<String>,
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    pub attempt: Option<TranscriptionAttempt>,
 }
 
 pub trait Transcriber {