fix: trocar modelo sherpa-onnx v3 para v2 (compatível com sidecar)

src-tauri/src/app_state.rs

@@ -48,8 +48,7 @@ impl Default for ManagedAppState {
 
 impl ManagedAppState {
     pub fn sherpa_model_dir(&self) -> PathBuf {
-        self.model_dir
-            .join("sherpa-onnx-nemo-parakeet-tdt-0.6b-v3-int8")
+        crate::models::sherpa_model_dir(&self.model_dir)
     }
 
     pub fn snapshot(&self) -> Result<AppSnapshot, String> {
@@ -89,7 +88,12 @@ fn app_data_dir() -> PathBuf {
     #[cfg(target_os = "linux")]
     {
         std::env::var("HOME")
-            .map(|home| PathBuf::from(home).join(".local").join("share").join("transcript"))
+            .map(|home| {
+                PathBuf::from(home)
+                    .join(".local")
+                    .join("share")
+                    .join("transcript")
+            })
             .unwrap_or_else(|_| std::env::temp_dir().join("transcript"))
     }
 

src-tauri/src/models/mod.rs

@@ -8,7 +8,7 @@ use crate::error::{AppError, AppResult};
 
 /// Modelo padrão usado pelo `SherpaOnnxTranscriber` (Etapa 2).
 /// É um pacote multi-arquivo do release `asr-models` do k2-fsa/sherpa-onnx.
-pub const SHERPA_MODEL_ID: &str = "sherpa-onnx-nemo-parakeet-tdt-0.6b-v3-int8";
+pub const SHERPA_MODEL_ID: &str = "sherpa-onnx-nemo-parakeet-tdt-0.6b-v2-int8";
 
 /// ID legado do modelo GGUF (mantido para o botão "Baixar modelo" não
 /// quebrar builds existentes que ainda apontam para o catálogo antigo).
@@ -76,14 +76,14 @@ pub fn catalog() -> Vec<OfflineModel> {
     vec![
         OfflineModel {
             id: SHERPA_MODEL_ID.to_string(),
-            display_name: "Parakeet TDT 0.6B v3 (sherpa-onnx int8)".to_string(),
+            display_name: "Parakeet TDT 0.6B v2 (sherpa-onnx int8)".to_string(),
             repository: "k2-fsa/sherpa-onnx asr-models".to_string(),
             quantization: "int8".to_string(),
             format: ModelFormat::Archive {
-                archive_url: "https://github.com/k2-fsa/sherpa-onnx/releases/download/asr-models/sherpa-onnx-nemo-parakeet-tdt-0.6b-v3-int8.tar.bz2"
+                archive_url: "https://github.com/k2-fsa/sherpa-onnx/releases/download/asr-models/sherpa-onnx-nemo-parakeet-tdt-0.6b-v2-int8.tar.bz2"
                     .to_string(),
-                archive_size_bytes: 670_000_000,
-                extracted_subdir: "sherpa-onnx-nemo-parakeet-tdt-0.6b-v3-int8".to_string(),
+                archive_size_bytes: 640_000_000,
+                extracted_subdir: "sherpa-onnx-nemo-parakeet-tdt-0.6b-v2-int8".to_string(),
                 required_files: vec![
                     "encoder.int8.onnx".to_string(),
                     "decoder.int8.onnx".to_string(),