Enhance regex pattern with expanded CJK character support and fix import sorting

Co-Authored-By: Joe Moura <joao@crewai.com>

src/crewai/agent.py

@@ -140,7 +140,10 @@ class Agent(BaseAgent):
                 self.embedder = crew_embedder
 
             if self.knowledge_sources:
-                full_pattern = re.compile(r"[^a-zA-Z0-9\u4e00-\u9fa5\-_\r\n]|(\.\.)")
+                # Unicode ranges for CJK characters:
+                # \u4e00-\u9fff: Common Chinese characters
+                # \u3400-\u4dbf: Extended CJK characters
+                full_pattern = re.compile(r"[^\w\u4e00-\u9fff\u3400-\u4dbf\-_\r\n]|(\.\.)")
                 knowledge_agent_name = f"{re.sub(full_pattern, '_', self.role)}"
                 if isinstance(self.knowledge_sources, list) and all(
                     isinstance(k, BaseKnowledgeSource) for k in self.knowledge_sources

tests/test_chinese_support/test_chinese_agent.py

@@ -1,10 +1,12 @@
-import pytest
 import re
 from unittest.mock import MagicMock, patch
 
+import pytest
+
 from crewai.agent import Agent
 from crewai.knowledge.source.string_knowledge_source import StringKnowledgeSource
 
+
 def test_agent_with_chinese_role_name():
     """Test that an agent with a Chinese role name works correctly with the updated regex pattern."""
     # Create a knowledge source with some content

tests/test_chinese_support/test_chinese_agent_name.py

@@ -1,9 +1,11 @@
-import pytest
 import re
 
+import pytest
+
 from crewai.agent import Agent
 from crewai.knowledge.source.string_knowledge_source import StringKnowledgeSource
 
+
 def test_agent_with_chinese_role_name():
     """Test that an agent with a Chinese role name works correctly."""
     # Create a knowledge source with some content