feat(huddle): swap STT default to Parakeet TDT-CTC 110M (EN, int8)

desktop/scripts/check-file-sizes.mjs

@@ -68,7 +68,7 @@ const overrides = new Map([
   ["src-tauri/src/events.rs", 610], // event builders + build_huddle_guidelines (kind:48106) + post_event_raw transport helper + participant p-tag on join/leave + NIP-43 relay admin builders (add/remove/change-role) + check_relay_role + DM/presence/workflow command builders
   ["src-tauri/src/huddle/kokoro.rs", 980], // Kokoro ONNX TTS engine + three-tier G2P + ARPAbet→IPA + CoreML + synth_chunk() public API + style validation + hyphenated compound splitting + 23 unit tests
   ["src-tauri/src/huddle/mod.rs", 1020], // huddle state machine + Tauri commands + sync protocol doc; state/relay/pipeline extracted + emit_huddle_state_changed wiring
-  ["src-tauri/src/huddle/models.rs", 850], // model download manager for Moonshine STT + Kokoro TTS with streaming downloads + SHA-256 verification + Rust-native tar extraction + version manifest + atomic swap + hot-start signaling
+  ["src-tauri/src/huddle/models.rs", 900], // model download manager for Parakeet TDT-CTC STT + Kokoro TTS with streaming downloads + SHA-256 verification + Rust-native tar extraction + version manifest + atomic swap + hot-start signaling + CC-BY-4.0 attribution sidecar + idempotent legacy Moonshine dir cleanup
   ["src-tauri/src/huddle/stt.rs", 580], // STT pipeline + PTT edge-detection flush + PTT gating (is_speech AND ptt_active) + barge-in for VAD mode + rubato resampler + earshot VAD + sherpa-onnx transcription
   ["src-tauri/src/huddle/preprocessing.rs", 670], // TTS text preprocessing pipeline + unified split_sentences + int_to_words 0-999999 + URL trailing punctuation preservation + 23 unit tests
   ["src-tauri/src/huddle/relay_api.rs", 520], // audio relay recv task + per-peer frame counting for remote human TTS interrupt + NIP-98 channel member query

desktop/src-tauri/src/huddle/mod.rs

@@ -658,8 +658,8 @@ pub async fn check_pipeline_hotstart(state: State<'_, AppState>) -> Result<(), S
     };
 
     // Check if models just became ready (one-shot flags).
-    let moonshine_ready = models::global_model_manager()
-        .map(|m| m.take_moonshine_ready())
+    let stt_ready = models::global_model_manager()
+        .map(|m| m.take_stt_ready())
         .unwrap_or(false);
     let kokoro_ready = models::global_model_manager()
         .map(|m| m.take_kokoro_ready())
@@ -672,7 +672,7 @@ pub async fn check_pipeline_hotstart(state: State<'_, AppState>) -> Result<(), S
         }
     }
 
-    if !has_stt && (moonshine_ready || models::is_moonshine_ready()) {
+    if !has_stt && (stt_ready || models::is_stt_ready()) {
         if let Some(eph_id) = &ephemeral_channel_id {
             if let Err(e) = maybe_start_stt_pipeline(&state, eph_id).await {
                 eprintln!("sprout-desktop: STT hotstart failed: {e}");
@@ -746,12 +746,12 @@ pub async fn start_stt_pipeline(state: State<'_, AppState>) -> Result<(), String
 
     match maybe_start_stt_pipeline(&state, &ephemeral_channel_id).await {
         Ok(true) => Ok(()),
-        Ok(false) => Err("Moonshine model not ready".to_string()),
+        Ok(false) => Err("STT model not ready".to_string()),
         Err(e) => Err(e),
     }
 }
 
-/// Trigger a background download of voice models (Moonshine STT + Kokoro TTS).
+/// Trigger a background download of voice models (Parakeet STT + Kokoro TTS).
 ///
 /// Returns immediately — downloads run in tokio background tasks.
 /// Poll `get_model_status` to track progress.
@@ -760,7 +760,7 @@ pub async fn start_stt_pipeline(state: State<'_, AppState>) -> Result<(), String
 pub async fn download_voice_models(state: State<'_, AppState>) -> Result<(), String> {
     let manager = models::global_model_manager()
         .ok_or("model manager unavailable (home directory could not be resolved)")?;
-    manager.start_moonshine_download(state.http_client.clone());
+    manager.start_stt_download(state.http_client.clone());
     manager.start_kokoro_download(state.http_client.clone());
     Ok(())
 }
@@ -771,8 +771,7 @@ pub fn get_model_status(_state: State<'_, AppState>) -> Result<models::VoiceMode
     let manager = models::global_model_manager()
         .ok_or("model manager unavailable (home directory could not be resolved)")?;
     Ok(models::VoiceModelStatus {
-        moonshine: manager.moonshine_status(),
-
+        stt: manager.stt_status(),
         kokoro: manager.kokoro_status(),
     })
 }