i18n: add card type labels for memorize feature

Add translations for cardTypeNew, cardTypeLearning, cardTypeReview,
cardTypeRelearning in all 8 supported languages (en-US, zh-CN, ja-JP,
ko-KR, de-DE, fr-FR, it-IT, ug-CN).

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-opencode)
Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

messages/de-DE.json

@@ -222,7 +222,11 @@
       "days": "{count} Tage",
       "months": "{count} Monate",
       "minAbbr": "m",
-      "dayAbbr": "T"
+      "dayAbbr": "T",
+      "cardTypeNew": "Neu",
+      "cardTypeLearning": "Lernen",
+      "cardTypeReview": "Wiederholung",
+      "cardTypeRelearning": "Neu lernen"
     },
     "page": {
       "unauthorized": "Sie sind nicht berechtigt, auf dieses Deck zuzugreifen"