Update app.py

app.py

@@ -86,7 +86,7 @@ THRESH_JSON = os.path.join(MODELS_DIR, "threshold.json")    # {"cosine_threshold
 # In-memory state
 G: np.ndarray | None = None         # (N, D) gallery templates, L2-normalized
 labels: list[str] | None = None
-COSINE_DIST_THRESHOLD: float = 0.35 # distance threshold; lower = stricter
+COSINE_SIM_THRESHOLD: float = 0.65  # similarity threshold; higher = stricter
 
 
 # ============================