fix: resolve linting issues across multiple files

- Remove unused imports (os, Optional, json, List, sys, MagicMock, DebugIssueTool)
- Remove unused variable assignments (safe_file_name)
- Fix f-strings without placeholders
- Reorder imports in test_live_integration.py

tests/test_live_integration.py

@@ -18,10 +18,10 @@ from pathlib import Path
 # Add parent directory to path to allow imports
 sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
 
+import json
+
 from tools.analyze import AnalyzeTool
 from tools.think_deeper import ThinkDeeperTool
-from tools.debug_issue import DebugIssueTool
-import json
 
 
 async def run_manual_live_tests():

tests/test_review_pending_changes.py

@@ -3,7 +3,7 @@ Tests for the review_pending_changes tool
 """
 
 import json
-from unittest.mock import MagicMock, Mock, patch
+from unittest.mock import Mock, patch
 
 import pytest