feat(cactus): add custom_vocabulary and vocabulary_boost to TranscribeOptions

crates/cactus/src/stt/mod.rs

@@ -36,4 +36,8 @@ pub struct TranscribeOptions {
     pub min_chunk_size: Option<u32>,
     #[serde(skip_serializing_if = "Option::is_none")]
     pub confirmation_threshold: Option<f64>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub custom_vocabulary: Option<Vec<String>>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub vocabulary_boost: Option<f32>,
 }

crates/transcribe-cactus/src/service/batch/transcribe.rs

@@ -25,8 +25,15 @@ pub(super) fn transcribe_batch(
 
     let model = hypr_cactus::Model::new(model_path)?;
 
+    let custom_vocabulary = if params.keywords.is_empty() {
+        None
+    } else {
+        Some(params.keywords.clone())
+    };
+
     let options = hypr_cactus::TranscribeOptions {
         language: hypr_cactus::constrain_to(&params.languages),
+        custom_vocabulary,
         ..Default::default()
     };
 

crates/transcribe-cactus/src/service/streaming/session.rs

@@ -53,9 +53,16 @@ pub(super) async fn handle_websocket(
     let total_channels = (params.channels as i32).max(1) as usize;
     let chunk_size_ms = 300;
 
+    let custom_vocabulary = if params.keywords.is_empty() {
+        None
+    } else {
+        Some(params.keywords.clone())
+    };
+
     let options = hypr_cactus::TranscribeOptions {
         language: hypr_cactus::constrain_to(&params.languages),
         min_chunk_size: Some((cactus_config.min_chunk_sec * SAMPLE_RATE as f32) as u32),
+        custom_vocabulary,
         ..Default::default()
     };