feat(voice): configurable user voice-recognition time (bargeInMs, default 700ms)

Expose the barge-in sustained-speech threshold as a dashboard bot setting
"유저 음성 인식 시간" (ms). Server clamps 0..5000, persists via state_store,
and the bot reads it each report round-trip; WSAI_BARGE_IN_MS/700 stays the
fallback default.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

wsai/bot_control.py

@@ -37,7 +37,13 @@ class BotControl:
         self._lists: dict[str, dict[str, Any]] = st.get("lists") or {}
         # Bot behaviour settings the dashboard toggles and the bot reads on each
         # report. bargeIn: stop the bot's current TTS the moment a user speaks.
-        self._settings: dict[str, Any] = {"bargeIn": True, **(st.get("botSettings") or {})}
+        # bargeInMs: how long (ms) a user must keep speaking before that barge-in
+        # fires — the "유저 음성 인식 시간" the dashboard exposes (default 700).
+        self._settings: dict[str, Any] = {
+            "bargeIn": True,
+            "bargeInMs": 700,
+            **(st.get("botSettings") or {}),
+        }
 
     # -- bot behaviour settings ------------------------------------------ #
     def get_settings(self) -> dict[str, Any]:
@@ -48,6 +54,13 @@ class BotControl:
         with self._lock:
             if "bargeIn" in data:
                 self._settings["bargeIn"] = bool(data["bargeIn"])
+            if "bargeInMs" in data:
+                try:
+                    ms = int(data["bargeInMs"])
+                except (TypeError, ValueError):
+                    ms = 700
+                # Keep it sane: 0ms = instant, cap at 5s so a typo can't wedge it.
+                self._settings["bargeInMs"] = max(0, min(5000, ms))
             out = dict(self._settings)
         from . import state_store
         state_store.patch("botSettings", out)