[claude] Fix pre-existing ruff lint errors blocking git hooks (#1247) (#1248)

src/infrastructure/router/classifier.py

@@ -13,7 +13,7 @@ from enum import Enum
 class TaskComplexity(Enum):
     """Task complexity tier for model routing."""
 
-    SIMPLE = "simple"   # Qwen3-8B Q6_K: routine, latency-sensitive
+    SIMPLE = "simple"  # Qwen3-8B Q6_K: routine, latency-sensitive
     COMPLEX = "complex"  # Qwen3-14B Q5_K_M: quality-sensitive, multi-step
 
 
@@ -118,12 +118,15 @@ def classify_task(messages: list[dict]) -> TaskComplexity:
         return TaskComplexity.SIMPLE
 
     # Concatenate all user-turn content for analysis
-    user_content = " ".join(
-        msg.get("content", "")
-        for msg in messages
-        if msg.get("role") in ("user", "human")
-        and isinstance(msg.get("content"), str)
-    ).lower().strip()
+    user_content = (
+        " ".join(
+            msg.get("content", "")
+            for msg in messages
+            if msg.get("role") in ("user", "human") and isinstance(msg.get("content"), str)
+        )
+        .lower()
+        .strip()
+    )
 
     if not user_content:
         return TaskComplexity.SIMPLE