Fix PYTHONPATH issue in workflow tests

- Add export PYTHONPATH before running pytest in Quick Tests
- Add export PYTHONPATH before running pytest in Full Test Suite
- This fixes ModuleNotFoundError when importing src modules

.gitea/workflows/manual-audio-test.yml

@@ -100,7 +100,8 @@ jobs:
         print('✅ Core modules loaded successfully')
         "
         
-        # Run minimal test suite
+        # Run minimal test suite with proper PYTHONPATH
+        export PYTHONPATH="${PYTHONPATH}:${PWD}"
         pytest tests/unit/test_audio_utils.py -v --tb=short
         
         echo "✅ Quick tests completed"
@@ -111,6 +112,9 @@ jobs:
         source venv/bin/activate
         echo "🔬 Running full test suite..."
         
+        # Set PYTHONPATH for proper module imports
+        export PYTHONPATH="${PYTHONPATH}:${PWD}"
+        
         # Run all tests with coverage
         pytest tests/ -v --tb=short --cov=src --cov-report=term-missing