Tighten Qwen3 tokenizer cache validation

openless-all/app/src-tauri/src/asr/local/sherpa.rs

@@ -130,7 +130,7 @@ pub fn required_files_for_alias(alias: &str) -> Result<&'static [&'static str]>
 
 pub fn required_path_is_valid(alias: &str, required: &str, path: &Path) -> bool {
     if required_path_is_dir(alias, required) {
-        path.is_dir()
+        required_dir_is_valid(alias, required, path)
     } else {
         path.is_file()
     }
@@ -140,6 +140,13 @@ fn required_path_is_dir(alias: &str, required: &str) -> bool {
     matches!((alias, required), ("qwen3-asr-0.6b-int8", "tokenizer"))
 }
 
+fn required_dir_is_valid(alias: &str, required: &str, path: &Path) -> bool {
+    match (alias, required) {
+        ("qwen3-asr-0.6b-int8", "tokenizer") => path.join("tokenizer.json").is_file(),
+        _ => false,
+    }
+}
+
 pub fn download_files_for_alias(alias: &str) -> Result<&'static [(&'static str, &'static str)]> {
     match alias {
         "sense-voice-small-zh" => Ok(&[
@@ -308,6 +315,7 @@ impl SherpaRuntimeStatus {
 #[cfg(test)]
 mod tests {
     use super::*;
+    use std::fs;
 
     #[test]
     fn provider_id_is_stable() {
@@ -336,6 +344,30 @@ mod tests {
         assert!(catalog.iter().all(|m| !m.cached));
     }
 
+    #[test]
+    fn qwen3_tokenizer_requires_tokenizer_json() {
+        let dir = std::env::temp_dir().join(format!(
+            "openless-sherpa-tokenizer-{}",
+            uuid::Uuid::new_v4()
+        ));
+        fs::create_dir_all(&dir).expect("create tokenizer dir");
+
+        assert!(!required_path_is_valid(
+            "qwen3-asr-0.6b-int8",
+            "tokenizer",
+            &dir
+        ));
+
+        fs::write(dir.join("tokenizer.json"), b"{}").expect("write tokenizer json");
+        assert!(required_path_is_valid(
+            "qwen3-asr-0.6b-int8",
+            "tokenizer",
+            &dir
+        ));
+
+        let _ = fs::remove_dir_all(dir);
+    }
+
     #[test]
     fn unavailable_status_uses_provider_id() {
         let status = SherpaRuntimeStatus::unavailable("paraformer-zh".into(), "not ready");