fix(gateway): reword butler filler to avoid a TTS mid-phrase pause

Kokoro inserts an unnatural ~0.2s pause before "for you", so "Let me check
on that for you, sir." came out as two phrases. Reword to "Let me check on
that, sir." — same intent, clean pacing (measured: no internal silence gap).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01LKPbR6DY2JygHbyLjxm7Uu

CHANGELOG.md

@@ -13,6 +13,8 @@ until the first tagged release.
 - A spoken volume command no longer leaves the face stuck in the thinking
   spinner — the feedback gong is a UI cue and no longer holds the busy state,
   so the return-to-idle isn't swallowed.
+- The butler filler line reads as one phrase instead of two — reworded to "Let
+  me check on that, sir." to avoid a text-to-speech pause before "for you".
 
 ## [0.2.0] — 2026-07-15
 

gateway/src/desklock_gateway/config.py

@@ -20,7 +20,8 @@ class Settings(BaseSettings):
     tts_voice: str = "bm_george"
 
     # Spoken immediately after a query is accepted, to fill the long Tatlock wait.
-    filler_text: str = "Let me check on that for you, sir."
+    # Avoid "for you" — Kokoro inserts an unnatural mid-phrase pause before it.
+    filler_text: str = "Let me check on that, sir."
 
     # embedded fallback only (requires the [speech] extra)
     embedded_stt_model: str = "small"