[eric] split: move aux LLM helpers out of agent_manager

backend/apps/agents/agent_manager.py

@@ -49,32 +49,13 @@ from backend.apps.agents.tool_catalog import (
     _get_denied_tool_names,
     _is_fully_denied,
 )
+from backend.apps.agents.aux_llm import _safe_resp_text
 
 logger = logging.getLogger(__name__)
 
 os.environ.setdefault("CLAUDE_CODE_STREAM_CLOSE_TIMEOUT", "3600000")
 
 
-def _safe_resp_text(resp) -> str:
-    """Extract text from an Anthropic-shape response, tolerating Gemini/OpenAI
-    edge cases. Gemini through 9Router occasionally returns `content=[]` (e.g.
-    safety stop, function-call-only turn) which makes `resp.content[0].text`
-    raise `'NoneType' object is not subscriptable` and bubbles up as a
-    fallback-required path. This walks the content list looking for the first
-    text block and returns "" if none exists, so callers can decide their own
-    fallback without a raw IndexError.
-    """
-    try:
-        blocks = getattr(resp, "content", None) or []
-        for b in blocks:
-            t = getattr(b, "text", None)
-            if isinstance(t, str) and t:
-                return t
-        return ""
-    except Exception:
-        return ""
-
-
 def _apply_context_window(session, settings=None) -> None:
     """Set session.context_window from the registry for its (provider, model).
 

backend/apps/agents/aux_llm.py

@@ -0,0 +1,18 @@
+def _safe_resp_text(resp) -> str:
+    """Extract text from an Anthropic-shape response, tolerating Gemini/OpenAI
+    edge cases. Gemini through 9Router occasionally returns `content=[]` (e.g.
+    safety stop, function-call-only turn) which makes `resp.content[0].text`
+    raise `'NoneType' object is not subscriptable` and bubbles up as a
+    fallback-required path. This walks the content list looking for the first
+    text block and returns "" if none exists, so callers can decide their own
+    fallback without a raw IndexError.
+    """
+    try:
+        blocks = getattr(resp, "content", None) or []
+        for b in blocks:
+            t = getattr(b, "text", None)
+            if isinstance(t, str) and t:
+                return t
+        return ""
+    except Exception:
+        return ""