Merge remote Space changes into drag-and-drop branch

Resolve the confidence-field conflict in favor of the remote's
None placeholder for the example garden entry.

app.py

@@ -158,7 +158,7 @@ def load_garden(user_id: str) -> list[dict]:
     "nickname": "Example Fig Tree",
     "photo": "plant_photos\\Example_Fig_Tree.jpg",
     "genus": "Ficus",
-    "confidence": 87.0,
+    "confidence": None,
     "added": datetime.date.today().isoformat(),
     "last_watered": None,
     "rained": False,