fix(polish): Traditional 模式强制中文字形转换，不再只靠 prompt (#622)

openless-all/app/src-tauri/src/coordinator/dictation.rs

@@ -341,9 +341,50 @@ mod tests {
             false,
             PolishMode::Light,
             false,
+            crate::types::ChineseScriptPreference::Auto,
         ));
     }
 
+    // issue #622：非 Auto 字形偏好必须关闭流式，改走会做字形转换的一次性路径。
+    #[test]
+    fn streaming_insert_ineligible_when_chinese_script_forced() {
+        for pref in [
+            crate::types::ChineseScriptPreference::Traditional,
+            crate::types::ChineseScriptPreference::Simplified,
+        ] {
+            assert!(!streaming_insert_eligible(
+                true,
+                false,
+                PolishMode::Light,
+                false,
+                pref,
+            ));
+        }
+    }
+
+    // issue #622：非 Auto + 成功 LLM 润色（非流式、无 error）时，最终插入文字
+    // 必须套用字形转换，不能只靠 prompt 指示。覆盖 issue 给出的两个验收用例。
+    #[test]
+    fn finalize_forces_traditional_even_on_successful_polish() {
+        let cases = [
+            ("你知道你今天想要做什么吗？", "你知道你今天想要做什麼嗎？"),
+            ("所以你已经考过了吗？", "所以你已經考過了嗎？"),
+        ];
+        for (input, expected) in cases {
+            let out = finalize_polished_text(
+                input.to_string(),
+                false,             // translation_active
+                true,              // raw_uses_llm
+                PolishMode::Light, // 成功润色路径（非 Raw、非 error）
+                &None,             // 无 polish_error
+                crate::types::ChineseScriptPreference::Traditional,
+                &[],   // 无 correction rules
+                false, // already_streamed
+            );
+            assert_eq!(out, expected);
+        }
+    }
+
     #[test]
     fn batch_asr_chunk_limit_applies_only_to_zhipu() {
         assert_eq!(batch_asr_chunk_limit_ms("zhipu"), Some(30_000));

openless-all/app/src-tauri/src/coordinator/dictation_end.rs

@@ -531,6 +531,7 @@ pub(crate) async fn end_session(inner: &Arc<Inner>) -> Result<(), String> {
         translation_active,
         mode,
         raw_uses_llm,
+        chinese_script_preference,
     );
     log::info!(
         "[coord] polish dispatch: translation={translation_active} mode={mode:?} streaming_eligible={streaming_eligible}"

openless-all/app/src-tauri/src/coordinator/dictation_streaming.rs

@@ -345,27 +345,23 @@ where
 
 pub(crate) fn finalize_polished_text(
     polished: String,
-    translation_active: bool,
+    _translation_active: bool,
     _raw_uses_llm: bool,
-    mode: PolishMode,
-    polish_error: &Option<String>,
+    _mode: PolishMode,
+    _polish_error: &Option<String>,
     chinese_script_preference: crate::types::ChineseScriptPreference,
     correction_rules: &[crate::types::CorrectionRule],
     already_streamed: bool,
 ) -> String {
     if already_streamed {
         return polished;
     }
-    let should_force_script = if translation_active {
-        polish_error.is_some()
-    } else {
-        mode == PolishMode::Raw || polish_error.is_some()
-    };
-    let polished = if should_force_script {
-        apply_chinese_script_preference(&polished, chinese_script_preference)
-    } else {
-        polished
-    };
+    // issue #622：无论是否经 LLM 润色成功，插入前都套用中文字形转换。
+    // apply_chinese_script_preference 对 Auto 是 no-op；非 Auto 时确保最终插入文字
+    // 不混简体——此前仅 Raw / 翻译 / 润色失败时强制转换，成功润色只靠 prompt 指示，
+    // 而部分 provider 会跟随简体 ASR 输入继续输出简体（流式路径已在上游回退为一次性，
+    // 见 streaming_insert_eligible）。
+    let polished = apply_chinese_script_preference(&polished, chinese_script_preference);
     if correction_rules.is_empty() {
         polished
     } else {
@@ -386,8 +382,14 @@ pub(crate) fn streaming_insert_eligible(
     translation_active: bool,
     mode: PolishMode,
     raw_uses_llm: bool,
+    chinese_script_preference: crate::types::ChineseScriptPreference,
 ) -> bool {
-    streaming_insert_enabled && !translation_active && (mode != PolishMode::Raw || raw_uses_llm)
+    streaming_insert_enabled
+        && !translation_active
+        && (mode != PolishMode::Raw || raw_uses_llm)
+        // issue #622：非 Auto 字形偏好需在插入前整体转换；流式逐字落字无法回退，
+        // 故关闭流式、走一次性路径（由 finalize_polished_text 套用字形转换）。
+        && chinese_script_preference == crate::types::ChineseScriptPreference::Auto
 }
 
 pub(crate) fn default_done_message(status: InsertStatus, polish_failed: bool) -> Option<String> {