refactor(safety): apply consistent formatting across services and tests

Improved code readability and uniformity by standardizing line breaks, indentation, and inline conditions across safety-related services, models, and tests, including content filters, validation rules, and emergency controls.

backend/tests/services/mcp/test_config.py

@@ -4,10 +4,8 @@ Tests for MCP Configuration System
 
 import os
 import tempfile
-from pathlib import Path
 
 import pytest
-import yaml
 
 from app.services.mcp.config import (
     MCPConfig,
@@ -217,9 +215,7 @@ mcp_servers:
 default_timeout: 60
 connection_pool_size: 20
 """
-        with tempfile.NamedTemporaryFile(
-            mode="w", suffix=".yaml", delete=False
-        ) as f:
+        with tempfile.NamedTemporaryFile(mode="w", suffix=".yaml", delete=False) as f:
             f.write(yaml_content)
             f.flush()
 
@@ -248,9 +244,7 @@ mcp_servers:
   explicit-server:
     url: http://explicit:8000
 """
-        with tempfile.NamedTemporaryFile(
-            mode="w", suffix=".yaml", delete=False
-        ) as f:
+        with tempfile.NamedTemporaryFile(mode="w", suffix=".yaml", delete=False) as f:
             f.write(yaml_content)
             f.flush()
 
@@ -267,9 +261,7 @@ mcp_servers:
   env-server:
     url: http://env:8000
 """
-        with tempfile.NamedTemporaryFile(
-            mode="w", suffix=".yaml", delete=False
-        ) as f:
+        with tempfile.NamedTemporaryFile(mode="w", suffix=".yaml", delete=False) as f:
             f.write(yaml_content)
             f.flush()