fix: preserve raw intent across language switching

gfa_core/mas/agents/router.py

@@ -54,6 +54,7 @@ class RouterAgent(BaseAgent):
             "history": history,
             "session_id": str(payload.get("session_id") or state.session_id),
             "job_id": str(payload.get("job_id") or state.job_id),
+            "language": str(payload.get("language") or "zh"),
         }
         if "goal_ledger" in payload:
             runtime_context["goal_ledger"] = payload.get("goal_ledger")

gfa_core/mas/agents/router_runtime.py

@@ -1174,6 +1174,7 @@ class RouterRuntime:
         session_id: str,
         job_id: str,
         goal_ledger: GoalLedger | None = None,
+        language: str = "zh",
     ) -> RouterOutcome:
         ui_action = self._config_dialog_ui_action(query)
         if ui_action is not None:
@@ -1399,6 +1400,7 @@ class RouterRuntime:
             job_id,
             decision,
             goal_ledger,
+            language,
         )
         definitions = self._definitions_for_route(
             decision,
@@ -2127,6 +2129,7 @@ class RouterRuntime:
         job_id: str,
         decision: RouteDecision,
         goal_ledger: GoalLedger | None,
+        language: str = "zh",
     ) -> list[LLMMessage]:
         normalized = []
         for item in history:
@@ -2150,6 +2153,12 @@ class RouterRuntime:
             f"\nTrusted locked route context: {route_context}."
             f"\nCurrent session_id={session_id!r}; current job_id={job_id!r}."
         )
+        if str(language or "zh").strip().lower() == "en":
+            context += (
+                "\nRespond to the user in English. Treat the language preference as "
+                "presentation metadata; do not rewrite the user query or pass the "
+                "language instruction to intent-recognition tools."
+            )
         if goal_ledger is not None:
             ledger_context = json.dumps(
                 goal_ledger.model_dump(mode="json", round_trip=True),