fix(backend): handle None destination in plan_next_actions to prevent errors

Previously, the code assumed dest was always a valid tuple, potentially causing errors if dest was None. Added a check to guide to current position when dest is None, ensuring safe fallback behavior.

CTF/backend/server.py

@@ -265,7 +265,10 @@ def plan_next_actions(req):
                         protect_list.remove((f[0],f[1]))
                     else:
                         continue
-        player_moves[p["name"]] = myMap.guideance(p["posX"],p["posY"],dest[0],dest[1])
+        if dest is not None:
+            player_moves[p["name"]] = myMap.guideance(p["posX"],p["posY"],dest[0],dest[1])
+        else:
+            player_moves[p["name"]] = myMap.guideance(p["posX"],p["posY"],p["posX"],p["posY"])
     return player_moves
 
 def game_over(req):