Fix Run All Tests to use last detection result for dynamic messaging

✅ Fixed Logic:
- Reverted hardcoded image back to memory image (training/memory/out1.png)
- Added lastDetectionResult global variable to track last detection
- Run All Tests now uses the last detection result (from upload or hardcoded test)

✅ Dynamic Behavior:
- Upload image with memory → Run All Tests shows '✅ Found X memory modules'
- Upload image without memory → Run All Tests shows '❌ No memory modules'
- No previous upload → Run All Tests uses hardcoded image (with memory)

✅ Workflow:
1. User uploads image without memory → detects 0 modules
2. User clicks 'Run All Tests' → shows '❌ No memory modules'
3. User uploads image with memory → detects X modules
4. User clicks 'Run All Tests' → shows '✅ Found X memory modules'

✅ Reset Logic:
- lastDetectionResult reset when file upload is reset
- Clean state management between different uploads

Now the Run All Tests correctly reflects the last detection result

main.py

@@ -37,7 +37,7 @@ MODEL_PATH = 'runs/detect/memory_module_detection/weights/best.pt'
 detector = MemoryModuleDetector(MODEL_PATH)
 
 # Hardcoded test image path
-HARDCODED_IMAGE_PATH = 'training/no_memory/out1.png'
+HARDCODED_IMAGE_PATH = 'training/memory/out1.png'
 
 def allowed_file(filename):
     """Check if file extension is allowed."""