feat: Add LOCAL variable support for responses with UTF-8 JSON encoding.

Description: This feature adds support for UTF-8 encoding in JSON responses, allowing for proper handling of special characters and emojis.

- Implement unit tests for UTF-8 encoding in various model providers including Gemini, OpenAI, and OpenAI Compatible.
- Validate UTF-8 support in token counting, content generation, and error handling.
- Introduce tests for JSON serialization ensuring proper handling of French characters and emojis.
- Create tests for language instruction generation based on locale settings.
- Validate UTF-8 handling in workflow tools including AnalyzeTool, CodereviewTool, and DebugIssueTool.
- Ensure that all tests check for correct UTF-8 character preservation and proper JSON formatting.
- Add integration tests to verify the interaction between locale settings and model responses.

providers/openai_compatible.py

@@ -311,11 +311,10 @@ class OpenAICompatibleProvider(ModelProvider):
         last_exception = None
 
         for attempt in range(max_retries):
-            try:
-                # Log the exact payload being sent for debugging
+            try:                # Log the exact payload being sent for debugging
                 import json
 
-                logging.info(f"o3-pro API request payload: {json.dumps(completion_params, indent=2)}")
+                logging.info(f"o3-pro API request payload: {json.dumps(completion_params, indent=2, ensure_ascii=False)}")
 
                 # Use OpenAI client's responses endpoint
                 response = self.client.responses.create(**completion_params)