Fix emoji encoding - replace surrogate pairs with proper Unicode escape

app.py

@@ -27,7 +27,7 @@ LABEL_COLORS = {
 LABEL_EMOJIS = {
     "Benign": "\u2705",
     "Injection": "\u26a0\ufe0f",
-    "Jailbreak": "\ud83d\udee8\ufe0f",
+    "Jailbreak": "\U0001f6e8\ufe0f",
 }