Fix keycard mismatch and typo in locked-door message

Inventory stored keycards under their full item_id (keycard_red) while
Room.locked_by/has_keycard checked against the plain color (red), so
the Waffentresor always reported itself as locked even with the
keycard in hand. Also fixes "rede Keycard" -> "rote Keycard".

doom_matrix/entities/items.py

@@ -78,7 +78,8 @@ class Inventory:
 
     def add(self, item, count=1):
         if item.kind == "key":
-            self.keycards.add(item.item_id)
+            color = item.item_id.removeprefix("keycard_")
+            self.keycards.add(color)
             return
         if item.kind == "fragment":
             self.crucible_fragments += count

doom_matrix/world/rooms.py

@@ -5,6 +5,8 @@
 from doom_matrix.engine.ui import Colors, slow_print, menu, section_title
 from doom_matrix.engine import cheats
 
+KEYCARD_COLOR_DE = {"red": "rote", "blue": "blaue", "yellow": "gelbe"}
+
 
 class Room:
     def __init__(self, room_id, name, description, exits=None, item_ids=None,
@@ -98,7 +100,8 @@ class Hub:
                 _, target_id = exit_keys[idx]
                 target = self.rooms.get(target_id)
                 if target and target.locked_by and not player.inventory.has_keycard(target.locked_by):
-                    slow_print(f"\n{Colors.RED}Diese Tuer benoetigt eine {target.locked_by}e Keycard.{Colors.END}")
+                    color_de = KEYCARD_COLOR_DE.get(target.locked_by, target.locked_by)
+                    slow_print(f"\n{Colors.RED}Diese Tuer benoetigt eine {color_de} Keycard.{Colors.END}")
                     return None
                 self.current_id = target_id
                 return None