feat: 增强国际化支持与安全头配置

- 在 .env.example 中新增 i18next 相关配置项以支持多语言功能
- 在 next.config.ts 中添加安全头配置以支持 iframe 嵌入
- 更新 Providers 组件以引入 i18n 配置
- 在 PlayerAppShell 中集成 LanguageSwitcher 组件以实现语言切换功能
- 优化 HallWalletStrip 组件的网络状态管理逻辑
- 更新多个组件以支持国际化文本

src/i18n/locales/zh/common.json

@@ -0,0 +1,21 @@
+{
+  "language": {
+    "en": "English",
+    "ne": "नेपाली",
+    "zh": "中文"
+  },
+  "languageShort": {
+    "en": "EN",
+    "ne": "NE",
+    "zh": "ZH"
+  },
+  "status": {
+    "done": "完成",
+    "inProgress": "进行中",
+    "pending": "待处理",
+    "failed": "失败"
+  },
+  "errors": {
+    "general": "通用"
+  }
+}

src/i18n/locales/zh/entry.json

@@ -0,0 +1,65 @@
+{
+  "header": {
+    "backgroundAlt": "页头背景"
+  },
+  "loading": {
+    "title": "正在进入彩票大厅",
+    "progress": "进度"
+  },
+  "steps": {
+    "token": {
+      "title": "校验登录凭证",
+      "description": "正在安全验证您的会话。"
+    },
+    "account": {
+      "title": "创建/同步账号",
+      "description": "正在为您设置账号。"
+    },
+    "hall": {
+      "title": "加载彩票大厅",
+      "description": "正在准备彩票大厅。"
+    }
+  },
+  "messages": {
+    "initializing": "正在初始化…",
+    "retrying": "正在重试…",
+    "verifying": "正在校验会话…",
+    "connectingHall": "正在连接彩票大厅…",
+    "ready": "就绪",
+    "retryProgress": "正在重试（{{current}}/{{total}}）…"
+  },
+  "failure": {
+    "title": "授权失败",
+    "subtitle": "无法完成授权，请重试。",
+    "detailsTitle": "失败详情",
+    "table": {
+      "no": "序号",
+      "check": "检查项",
+      "reason": "原因"
+    },
+    "reenter": "重新进入"
+  },
+  "success": {
+    "title": "授权成功！",
+    "subtitle": "您的会话已通过验证。",
+    "doneLabel": "完成",
+    "continue": "进入彩票大厅"
+  },
+  "footer": {
+    "secure": "安全 · 可信 · 授权访问"
+  },
+  "errors": {
+    "noToken": "未发现授权令牌",
+    "noTokenDetail": "请返回主站后重试。",
+    "authFailed": "授权失败",
+    "unknown": "未知错误",
+    "network": "网络异常",
+    "networkDetail": "请检查网络连接后重试。",
+    "maxRetries": "多次重试仍无法连接",
+    "maxRetriesDetail": "服务器可能暂时不可用。",
+    "tryLater": "请稍后再试",
+    "http401": "令牌无效或已过期",
+    "http403": "账号已被封禁",
+    "http404": "系统中未找到该账号"
+  }
+}

src/i18n/locales/zh/layout.json

@@ -0,0 +1,5 @@
+{
+  "brand": {
+    "title": "彩票"
+  }
+}