feat: Implement recipe repair cancellation with UI support and refactor LoadingManager to a singleton.

locales/zh-TW.json

@@ -167,6 +167,7 @@
             "label": "修復配方資料",
             "loading": "正在修復配方資料...",
             "success": "成功修復 {count} 個配方。",
+            "cancelled": "修復已取消。已修復 {count} 個配方。",
             "error": "配方修復失敗：{message}"
         }
     },
@@ -1528,4 +1529,4 @@
             "learnMore": "LM Civitai Extension Tutorial"
         }
     }
-}
+}