feat: track history of last 3 predictions

Co-authored-by: aider (gemini/gemini-2.5-pro-preview-05-06) <aider@aider.chat>

server.py

@@ -27,6 +27,8 @@ CLASS_NAMES = ['closed', 'open'] # From training, sorted alphabetically
 POLL_INTERVAL_SECONDS = 10
 REQUEST_TIMEOUT_SECONDS = 5
 UNSURE_CONFIDENCE_THRESHOLD = 0.97
+PREDICTION_HISTORY = []
+PREDICTION_HISTORY_MAX_LENGTH = 3
 
 # --- Model Inference ---
 def get_prediction(model, image_bytes, device):
@@ -74,6 +76,16 @@ async def monitor_garage_door(app):
                         prediction, confidence = result
                         logging.debug(f"Garage door status: {prediction} (confidence: {confidence:.4f})")
 
+                        # Update prediction history
+                        if confidence >= UNSURE_CONFIDENCE_THRESHOLD:
+                            PREDICTION_HISTORY.append(prediction)
+                        else:
+                            PREDICTION_HISTORY.append('unknown')
+                        
+                        # Trim history if it's too long
+                        if len(PREDICTION_HISTORY) > PREDICTION_HISTORY_MAX_LENGTH:
+                            PREDICTION_HISTORY.pop(0)
+
                         if confidence < UNSURE_CONFIDENCE_THRESHOLD:
                             # Sanitize timestamp for use in filename
                             timestamp = datetime.now().isoformat().replace(':', '-')