refactor: 完成全站国际化改造，统一多语言支持

此提交完成了全项目的国际化适配：
1. 新增多语言翻译文件与基础配置
2. 替换所有硬编码文本为i18n调用
3. 优化语言切换与文档语言同步逻辑
4. 重构部分业务逻辑以支持动态翻译
5. 移除过时代码与硬编码配置

src/features/hall/use-hall-draw-live.ts

@@ -1,6 +1,6 @@
 "use client";
 
-import { useCallback, useEffect, useMemo, useState } from "react";
+import { useCallback, useEffect, useState } from "react";
 
 import { getDrawCurrent } from "@/api/draw";
 import { getLotteryEcho } from "@/lib/lottery-echo";
@@ -76,17 +76,11 @@ export function useHallDrawLive(): {
       setRaw(d);
       setEmittedAtMs(Date.now());
     } catch {
-      setError("加载失败，请下拉刷新");
+      setError("draw.loadFailedRefresh");
       setRaw(undefined);
     }
   }, []);
 
-  // WebSocket 正常时的轮询间隔（作为备用）
-  const refreshMs = useMemo(() => {
-    if (raw === undefined) return 30_000;
-    return raw ? 60_000 : 30_000; // WebSocket正常时减少轮询频率
-  }, [raw]);
-
   // 初始加载
   useEffect(() => {
     const timer = window.setTimeout(() => {
@@ -199,14 +193,22 @@ export function useHallDrawLive(): {
     if (!isWebSocketConnected && mode !== "websocket") {
       const currentPollingId = useNetworkConnectionStore.getState().drawPollingIntervalId;
       if (!currentPollingId) {
-        // 立即执行一次
-        void load();
+        const initialLoadId = window.setTimeout(() => {
+          void load();
+        }, 0);
 
         // 设置30秒轮询
         intervalId = window.setInterval(() => {
           void load();
         }, 30_000);
         setDrawPollingIntervalId(intervalId);
+        return () => {
+          window.clearTimeout(initialLoadId);
+          if (intervalId) {
+            window.clearInterval(intervalId);
+            setDrawPollingIntervalId(null);
+          }
+        };
       }
     }