feat: add study modes to Memorize page

- Add 4 study modes: order-limited, order-infinite, random-limited, random-infinite
- Add mode selector buttons with icons
- Update progress display for infinite modes
- Add translations for all 8 locales

messages/zh-CN.json

@@ -297,7 +297,12 @@
       "typeWhatYouHear": "输入你听到的内容",
       "correct": "正确",
       "incorrect": "错误",
-      "nextCard": "下一张"
+      "nextCard": "下一张",
+      "modeOrderLimited": "顺序",
+      "modeOrderInfinite": "循环",
+      "modeRandomLimited": "随机",
+      "modeRandomInfinite": "随机循环",
+      "restart": "重新开始"
     },
     "page": {
       "unauthorized": "您无权访问该牌组"