Add comprehensive unit tests for BuddAI confidence scoring and fallback mechanisms

- Implemented tests for confidence scoring logic in `test_buddai_confidence.py` and `test_confidence.py`, covering high and low confidence scenarios, escalation thresholds, and validation scoring penalties.
- Created tests for fallback logging functionality in `test_fallback_logging.py`, ensuring fallback prompts are logged correctly and the `/logs` command retrieves log content.
- Developed tests for fallback prompts in `test_fallback_prompts.py`, verifying that specific prompts are used for different models based on confidence levels.
- Generated detailed test reports for multiple test runs, confirming all tests passed successfully.

test_fallback_client.py

@@ -0,0 +1,45 @@
+import unittest
+from unittest.mock import MagicMock, patch
+import sys
+import os
+from pathlib import Path
+
+# Setup path
+REPO_ROOT = Path(__file__).parent.parent
+if str(REPO_ROOT) not in sys.path:
+    sys.path.insert(0, str(REPO_ROOT))
+
+from core.buddai_fallback import FallbackClient
+
+class TestFallbackClient(unittest.TestCase):
+    @patch('core.buddai_fallback.genai')
+    def test_escalate_success(self, mock_genai):
+        """Test successful escalation to Gemini"""
+        # Setup mocks
+        mock_model = MagicMock()
+        mock_response = MagicMock()
+        mock_response.text = "Fixed Code"
+        mock_model.generate_content.return_value = mock_response
+        mock_genai.GenerativeModel.return_value = mock_model
+        
+        # Force HAS_GEMINI to True for this test
+        with patch('core.buddai_fallback.HAS_GEMINI', True):
+            with patch.dict('os.environ', {'GEMINI_API_KEY': 'fake_key'}):
+                client = FallbackClient()
+                # Inject mock client since __init__ might fail if real genai not installed
+                client.client = mock_model
+                
+                result = client.escalate_to_gemini("prompt", "bad code", 50)
+                
+                self.assertIn("Gemini Fallback", result)
+                self.assertIn("Fixed Code", result)
+
+    def test_escalate_no_key(self):
+        """Test behavior when API key is missing"""
+        with patch.dict('os.environ', {}, clear=True):
+            client = FallbackClient()
+            result = client.escalate_to_gemini("prompt", "bad code", 50)
+            self.assertIn("Fallback unavailable", result)
+
+if __name__ == '__main__':
+    unittest.main()