agent: foundation — sync incremental changes from legacy codebase

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src-tauri/src/commands/transcription.rs

@@ -123,6 +123,7 @@ pub async fn transcribe_pcm_parakeet(
     remove_fillers: bool,
     british_english: bool,
     anti_hallucination: bool,
+    format_mode: String,
 ) -> Result<(), String> {
     let engine = state.parakeet_engine.clone();
     let audio = kon_core::AudioSamples::mono_16khz(samples);
@@ -141,7 +142,7 @@ pub async fn transcribe_pcm_parakeet(
             remove_fillers,
             british_english,
             anti_hallucination,
-            format_mode: FormatMode::parse("Clean"),
+            format_mode: FormatMode::parse(&format_mode),
         },
     );