refactor(settings): 统一语言设置，合并 interface_language 和 ai_language

- 后端 Schema 将 interface_language 和 ai_language 合并为 language
- 前端设置界面只保留一个语言选项
- AI 回复语言统一使用 language 设置
- 更新协议文档
- 新增数据库迁移脚本

apps/lib/l10n/app_zh_hant.arb

@@ -55,8 +55,7 @@
   "settingsSectionPrivacy": "隱私設定",
   "settingsSectionNotification": "通知設定",
   "settingsAccountAndDataTitle": "帳號資料",
-  "settingsInterfaceLanguage": "介面語言",
-  "settingsAiLanguage": "AI 回覆語言",
+  "settingsLanguage": "語言",
   "settingsNotificationAllow": "允許通知",
   "settingsNotificationVibration": "允許振動",
   "settingsSectionAbout": "關於",
@@ -73,7 +72,6 @@
     }
   },
   "settingsCoinHeroSubtitle": "點數可用於後續起卦與相關服務消費",
-  "settingsAiLanguage": "AI 回覆語言",
   "settingsPrivacyProfileVisibility": "資料可見性",
   "settingsPrivacyPersonalization": "個人化推薦",
   "settingsPrivacyHistoryVisibility": "歷史記錄展示",
@@ -128,6 +126,7 @@
   "settingsCoinPackPopular": "常用加量包",
   "settingsCoinPackPremium": "高頻進階包",
   "settingsCoinPackPopularBadge": "推薦",
+  "settingsCoinPackNewUserBadge": "限購一次",
   "settingsPurchaseButton": "立即支付",
   "settingsPurchasePending": "",
   "settingsCoinAmount": "{amount} 點數",
@@ -367,16 +366,25 @@
   "timeMinutesAgo": "{minutes}分鐘前",
   "@timeMinutesAgo": {
     "placeholders": {
+      "minutes": {
+        "type": "int"
+      }
     }
   },
   "timeHoursAgo": "{hours}小時前",
   "@timeHoursAgo": {
     "placeholders": {
+      "hours": {
+        "type": "int"
+      }
     }
   },
   "timeDaysAgo": "{days}天前",
   "@timeDaysAgo": {
     "placeholders": {
+      "days": {
+        "type": "int"
+      }
     }
   },
   "resultFocusPoints": "斷卦要點",
@@ -413,5 +421,20 @@
   "paymentProductNotFound": "商品暫時不可用",
   "paymentStarterPackIneligible": "新手包每位用戶僅限購買一次",
   "paymentProductUnavailable": "商品暫時不可用",
-  "paymentPending": "Apple 正在處理中，請稍候"
+  "paymentPending": "Apple 正在處理中，請稍候",
+  "pointsLedgerTitle": "積分流水",
+  "pointsLedgerEmpty": "暫無流水記錄",
+  "pointsLedgerTypeRegister": "註冊贈送",
+  "pointsLedgerTypePurchase": "購買積分包",
+  "pointsLedgerTypeConsume": "AI 對話消耗",
+  "pointsLedgerTypeAdjust": "系統調整",
+  "pointsLedgerTypeRefund": "退款",
+  "pointsLedgerBalance": "餘額 {balance}",
+  "@pointsLedgerBalance": {
+    "placeholders": {
+      "balance": {
+        "type": "int"
+      }
+    }
+  }
 }