feat: Implement user account center with authentication, subscription management, and cryptocurrency payment integration.

frontend/app/api/payments/wallets/route.ts

@@ -40,3 +40,55 @@ export async function GET(req: NextRequest) {
   }
 }
 
+export async function DELETE(req: NextRequest) {
+  if (!API_BASE) {
+    return NextResponse.json(
+      { error: "POLYWEATHER_API_BASE_URL is not configured" },
+      { status: 500 },
+    );
+  }
+  let payload: Record<string, unknown> = {};
+  try {
+    payload = (await req.json()) as Record<string, unknown>;
+  } catch {
+    payload = {};
+  }
+  try {
+    const auth = await buildBackendRequestHeaders(req);
+    const res = await fetch(`${API_BASE}/api/payments/wallets`, {
+      method: "DELETE",
+      headers: {
+        ...auth.headers,
+        "Content-Type": "application/json",
+      },
+      body: JSON.stringify(payload),
+      cache: "no-store",
+    });
+    const raw = await res.text();
+    if (!res.ok) {
+      const response = NextResponse.json(
+        { error: `Backend returned ${res.status}`, detail: raw.slice(0, 350) },
+        { status: res.status },
+      );
+      return applyAuthResponseCookies(response, auth.response);
+    }
+    let data: unknown = { ok: true };
+    if (raw) {
+      try {
+        data = JSON.parse(raw);
+      } catch {
+        data = { ok: true, raw };
+      }
+    }
+    const response = NextResponse.json(data, {
+      headers: { "Cache-Control": "no-store" },
+    });
+    return applyAuthResponseCookies(response, auth.response);
+  } catch (error) {
+    return NextResponse.json(
+      { error: "Failed to unbind wallet", detail: String(error) },
+      { status: 500 },
+    );
+  }
+}
+

frontend/app/auth/login/page.tsx

@@ -1,4 +1,5 @@
 import { LoginClient } from "@/components/auth/LoginClient";
+import { I18nProvider } from "@/hooks/useI18n";
 
 type PageProps = {
   searchParams?: Promise<{ next?: string }>;
@@ -16,6 +17,9 @@ function normalizeNextPath(input: string | undefined) {
 export default async function LoginPage({ searchParams }: PageProps) {
   const params = (await searchParams) || {};
   const nextPath = normalizeNextPath(params.next);
-  return <LoginClient nextPath={nextPath} />;
+  return (
+    <I18nProvider>
+      <LoginClient nextPath={nextPath} />
+    </I18nProvider>
+  );
 }
-

frontend/components/account/AccountCenter.tsx

@@ -41,6 +41,7 @@ import {
   getSupabaseBrowserClient,
   hasSupabasePublicEnv,
 } from "@/lib/supabase/client";
+import { useI18n } from "@/hooks/useI18n";
 
 const UnlockProOverlay = dynamic(
   () =>
@@ -489,6 +490,94 @@ function normalizePaymentError(error: unknown): NormalizedPaymentError {
 
 export function AccountCenter() {
   const router = useRouter();
+  const { locale } = useI18n();
+  const isEn = locale === "en-US";
+  const copy = useMemo(
+    () => ({
+      backHome: isEn ? "Back to Home" : "返回首页",
+      accountCenter: isEn ? "Account Center" : "账户中心",
+      loadingAccount: isEn ? "Loading account info..." : "加载账户信息中...",
+      refresh: isEn ? "Refresh" : "刷新",
+      signOut: isEn ? "Sign Out" : "退出",
+      signIn: isEn ? "Sign In" : "登录",
+      upgradePro: isEn ? "Upgrade Pro" : "升级 Pro",
+      guestUser: isEn ? "Guest User" : "游客用户",
+      joinedAt: isEn ? "Joined" : "加入时间",
+      totalPoints: isEn ? "Total Points" : "总积分 (荣誉)",
+      weeklyRank: isEn ? "Weekly Rank" : "周排行 (竞技)",
+      weeklyRewards: isEn ? "Weekly Rewards" : "周榜奖励",
+      membershipDetails: isEn ? "Membership Details" : "会员权限详情",
+      identityStatus: isEn ? "Identity Status" : "身份状态",
+      authMode: isEn ? "Auth Mode" : "鉴权模式",
+      weatherEngine: isEn ? "Weather Engine" : "气象引擎",
+      intradayAnalysis: isEn ? "Intraday Analysis" : "今日内分析",
+      historyFuture:
+        isEn ? "Historical + Future-date Analysis" : "历史对账 + 未来日期分析",
+      smartPush:
+        isEn ? "Cross-platform Smart Weather Push" : "全平台智能气象推送",
+      deepMode:
+        isEn ? "Deep mode (incl. high-temp window)" : "深度版（含高温时段）",
+      compactVisible: isEn ? "Compact visible" : "简版可见",
+      enabled: isEn ? "Enabled" : "已开启",
+      locked: isEn ? "Locked" : "锁定",
+      boundEmail: isEn ? "Bound Email" : "绑定邮箱",
+      loginMethod: isEn ? "Sign-in Method" : "登录方式",
+      renewalDate: isEn ? "Renewal Date" : "续费日期",
+      authResult: isEn ? "Auth Result" : "鉴权结果",
+      passed: isEn ? "Passed" : "通过",
+      restricted: isEn ? "Restricted" : "受限",
+      telegramBind: isEn ? "Telegram Bot Binding" : "Telegram Bot 绑定",
+      telegramHint: isEn
+        ? "Send the command below to the polyweather bot to sync notifications and access."
+        : "将下方命令发送给polyweather机器人，实现全平台气象推送与权限同步。",
+      copyCommand: isEn ? "Copy command" : "复制命令",
+      paymentMgmt: isEn ? "Payment Management" : "支付管理",
+      paymentToken: isEn ? "Payment Token" : "支付币种",
+      primary: "Primary",
+      polygonChain: "Polygon Chain",
+      noWallet: isEn ? "No payout wallet bound yet." : "未绑定任何收件钱包",
+      bindExt:
+        isEn ? "Bind Browser Wallet (EVM Extension)" : "绑定浏览器钱包（EVM扩展）",
+      bindQr: isEn ? "Bind via QR (WalletConnect)" : "扫码绑定（WalletConnect）",
+      walletConnectMissing: isEn
+        ? "WalletConnect disabled: please configure"
+        : "未启用 WalletConnect：请配置",
+      unbind: isEn ? "Unbind" : "解绑",
+      unbindConfirm: isEn
+        ? "Unbind wallet {address}? You can bind it again later."
+        : "确认解绑钱包 {address}？后续可重新绑定。",
+      unbindDone: isEn ? "Wallet unbound." : "钱包已解绑。",
+      unbindDonePrimary: isEn
+        ? "Wallet unbound. New primary: {address}"
+        : "钱包已解绑，新的主钱包：{address}",
+      unbindFailed: isEn ? "Failed to unbind wallet" : "解绑钱包失败",
+      payNow: isEn ? "Subscribe & Activate" : "立即订阅并激活服务",
+      connectAndPay: isEn ? "Connect Wallet & Pay" : "连接钱包并支付",
+      loginBeforeBind: isEn
+        ? "Please sign in before binding wallet."
+        : "请先登录后再绑定钱包。",
+      loginBeforePay: isEn
+        ? "Please sign in before payment."
+        : "请先登录后再支付。",
+      bindFirstBeforePay: isEn
+        ? "Please bind a wallet first."
+        : "请先绑定钱包。",
+      payNotReady: isEn
+        ? "Payment service is not fully configured."
+        : "支付服务未配置完成。",
+      openBindFlow: isEn
+        ? "Please bind a wallet first. Opening bind flow..."
+        : "请先完成钱包绑定，正在拉起绑定流程...",
+      walletBoundCreatingOrder: isEn
+        ? "Wallet bound. Creating order and sending payment..."
+        : "钱包已绑定，正在创建订单并发起支付...",
+      proMember: "PRO MEMBER",
+      freeTier: "FREE TIER",
+      proPendingSync: isEn ? "Activated (pending sync)" : "已开通（待同步）",
+      noProSubscription: isEn ? "No Pro subscription" : "暂无 Pro 订阅",
+    }),
+    [isEn],
+  );
 
   const [loading, setLoading] = useState(true);
   const [refreshing, setRefreshing] = useState(false);
@@ -522,7 +611,12 @@ export function AccountCenter() {
    * is missing or close to expiry. Throws if the user is not authenticated.
    */
   const getValidAccessToken = useCallback(async (): Promise<string> => {
-    if (!supabaseReady) throw new Error("Supabase 未配置，无法获取登录凭证。");
+    if (!supabaseReady)
+      throw new Error(
+        isEn
+          ? "Supabase is not configured. Unable to get auth token."
+          : "Supabase 未配置，无法获取登录凭证。",
+      );
     const client = getSupabaseBrowserClient();
     // First try the cached session.
     const {
@@ -539,10 +633,14 @@ export function AccountCenter() {
     if (refreshedToken) return refreshedToken;
     throw new Error(
       error?.message
-        ? `登录会话已失效 (${error.message})，请退出后重新登录。`
+        ? isEn
-        : "登录会话已失效，请退出后重新登录。",
+          ? `Session expired (${error.message}). Please sign out and sign in again.`
+          : `登录会话已失效 (${error.message})，请退出后重新登录。`
+        : isEn
+          ? "Session expired. Please sign out and sign in again."
+          : "登录会话已失效，请退出后重新登录。",
     );
-  }, [supabaseReady]);
+  }, [isEn, supabaseReady]);
 
   const buildAuthedHeaders = useCallback(
     async (withJson = false): Promise<Record<string, string>> => {
@@ -764,19 +862,19 @@ export function AccountCenter() {
   const displayName =
     String(user?.user_metadata?.full_name || "").trim() ||
     (email ? String(email).split("@")[0] : "") ||
-    "PolyWeather 用户";
+    copy.guestUser;
   const initials = (displayName.slice(0, 2) || "PW").toUpperCase();
-  const joinedAt = formatTime(user?.created_at, "zh-CN");
+  const joinedAt = formatTime(user?.created_at, locale);
   const isSubscribed = Boolean(backend?.subscription_active);
   const expiryRaw = String(
     backend?.subscription_expires_at || user?.user_metadata?.pro_expiry || "",
   ).trim();
-  const expiryFormatted = formatTime(expiryRaw, "zh-CN");
+  const expiryFormatted = formatTime(expiryRaw, locale);
   const proExpiry = isSubscribed
     ? expiryFormatted !== "--"
       ? expiryFormatted
-      : expiryRaw || "已开通（待同步）"
+      : expiryRaw || copy.proPendingSync
-    : "暂无 Pro 订阅";
+    : copy.noProSubscription;
 
   // Points Logic
   const backendPointsRaw = Number(backend?.points);
@@ -1073,7 +1171,7 @@ export function AccountCenter() {
     setPaymentError("");
     setPaymentInfo("");
     if (!isAuthenticated) {
-      setPaymentError("请先登录后再绑定钱包。");
+      setPaymentError(copy.loginBeforeBind);
       return false;
     }
 
@@ -1101,7 +1199,7 @@ export function AccountCenter() {
         method: "eth_requestAccounts",
       })) as string[];
       const address = String(accounts?.[0] || "").toLowerCase();
-      if (!address) throw new Error("钱包账户为空");
+      if (!address) throw new Error(isEn ? "Wallet account is empty." : "钱包账户为空");
 
       const existingWallet = boundWallets.find(
         (w) => String(w.address || "").toLowerCase() === address,
@@ -1163,16 +1261,77 @@ export function AccountCenter() {
     }
   };
 
+  const handleUnbindWallet = async (address: string) => {
+    const target = String(address || "").toLowerCase();
+    if (!target) return;
+    if (!isAuthenticated) {
+      setPaymentError(copy.loginBeforeBind);
+      return;
+    }
+    const confirmed = window.confirm(
+      copy.unbindConfirm.replace("{address}", shortAddress(target)),
+    );
+    if (!confirmed) return;
+
+    setPaymentBusy(true);
+    setPaymentError("");
+    setPaymentInfo("");
+    try {
+      const headers = await buildAuthedHeaders(true);
+      const res = await fetch("/api/payments/wallets", {
+        method: "DELETE",
+        headers,
+        body: JSON.stringify({ address: target }),
+      });
+      const raw = await res.text();
+      if (!res.ok) {
+        let detail = raw;
+        try {
+          const parsed = JSON.parse(raw);
+          detail = String(parsed?.detail || parsed?.error || raw);
+        } catch {
+          // ignore
+        }
+        throw new Error(detail || `HTTP ${res.status}`);
+      }
+
+      let data: Record<string, unknown> = {};
+      try {
+        data = raw ? (JSON.parse(raw) as Record<string, unknown>) : {};
+      } catch {
+        data = {};
+      }
+      const newPrimary = String(data?.new_primary || "").toLowerCase();
+      if (selectedWallet === target) {
+        setSelectedWallet(newPrimary || "");
+      }
+      if (walletAddress === target) {
+        setWalletAddress(newPrimary || "");
+      }
+      await loadPaymentSnapshot();
+      setPaymentInfo(
+        newPrimary
+          ? copy.unbindDonePrimary.replace("{address}", shortAddress(newPrimary))
+          : copy.unbindDone,
+      );
+    } catch (error) {
+      const message = normalizePaymentError(error).message;
+      setPaymentError(`${copy.unbindFailed}: ${message}`);
+    } finally {
+      setPaymentBusy(false);
+    }
+  };
+
   const createIntentAndPay = async () => {
     setPaymentError("");
     setPaymentInfo("");
     setLastTxHash("");
     if (!isAuthenticated) {
-      setPaymentError("请先登录后再支付。");
+      setPaymentError(copy.loginBeforePay);
       return;
     }
     if (!paymentConfig?.configured) {
-      setPaymentError("支付服务未配置完成。");
+      setPaymentError(copy.payNotReady);
       return;
     }
 
@@ -1180,7 +1339,7 @@ export function AccountCenter() {
       selectedWallet || walletAddress || boundWallets[0]?.address || "",
     ).toLowerCase();
     if (!fallbackWallet) {
-      setPaymentError("请先绑定钱包。");
+      setPaymentError(copy.bindFirstBeforePay);
       return;
     }
 
@@ -1193,7 +1352,7 @@ export function AccountCenter() {
         method: "eth_requestAccounts",
       })) as string[];
       const activeAddress = String(activeAccounts?.[0] || "").toLowerCase();
-      if (!activeAddress) throw new Error("钱包账户为空");
+      if (!activeAddress) throw new Error(isEn ? "Wallet account is empty." : "钱包账户为空");
 
       const boundAddrSet = new Set(
         boundWallets.map((row) => String(row.address || "").toLowerCase()),
@@ -1408,16 +1567,16 @@ export function AccountCenter() {
 
   const handleOverlayCheckout = async () => {
     if (!isAuthenticated) {
-      setPaymentError("请先登录后再支付。");
+      setPaymentError(copy.loginBeforePay);
       return;
     }
     if (!hasPayingWallet) {
-      setPaymentInfo("请先完成钱包绑定，正在拉起绑定流程...");
+      setPaymentInfo(copy.openBindFlow);
       const bound = await connectAndBindWallet(providerMode, {
         openOverlayAfterBind: true,
       });
       if (!bound) return;
-      setPaymentInfo("钱包已绑定，正在创建订单并发起支付...");
+      setPaymentInfo(copy.walletBoundCreatingOrder);
       await createIntentAndPay();
       return;
     }
@@ -1431,7 +1590,7 @@ export function AccountCenter() {
       <div className="flex h-screen w-full items-center justify-center bg-[#0b0f1a]">
         <div className="flex flex-col items-center gap-4">
           <Loader2 className="h-12 w-12 animate-spin text-blue-500" />
-          <p className="text-slate-400 font-medium">加载账户信息中...</p>
+          <p className="text-slate-400 font-medium">{copy.loadingAccount}</p>
         </div>
       </div>
     );
@@ -1449,7 +1608,8 @@ export function AccountCenter() {
           <Link
             href="/"
             className="p-2 bg-white/5 hover:bg-white/10 border border-white/10 rounded-full text-slate-400 hover:text-white transition-all active:scale-90 group"
-            title="返回首页"
+            title={copy.backHome}
+            aria-label={copy.backHome}
           >
             <ChevronLeft
               size={20}
@@ -1458,7 +1618,7 @@ export function AccountCenter() {
           </Link>
           <div>
             <h1 className="text-2xl font-bold text-white flex items-center gap-2">
-              账户中心
+              {copy.accountCenter}
             </h1>
           </div>
         </div>
@@ -1468,7 +1628,7 @@ export function AccountCenter() {
               onClick={() => setShowOverlay(true)}
               className="flex items-center gap-2 px-4 py-2 bg-yellow-500/10 hover:bg-yellow-500/20 border border-yellow-500/30 text-yellow-500 rounded-xl text-sm transition-all animate-pulse"
             >
-              <Crown size={16} /> 升级 Pro
+              <Crown size={16} /> {copy.upgradePro}
             </button>
           )}
           <button
@@ -1482,21 +1642,21 @@ export function AccountCenter() {
             ) : (
               <RefreshCw size={16} />
             )}{" "}
-            刷新
+            {copy.refresh}
           </button>
           {isAuthenticated ? (
             <button
               onClick={() => void onSignOut()}
               className="flex items-center gap-2 px-4 py-2 bg-red-500/10 hover:bg-red-500/20 border border-red-500/20 text-red-400 rounded-xl text-sm transition-all"
             >
-              <LogOut size={16} /> 退出
+              <LogOut size={16} /> {copy.signOut}
             </button>
           ) : (
             <Link
               href="/auth/login?next=%2Faccount"
               className="flex items-center gap-2 px-4 py-2 bg-blue-500/10 hover:bg-blue-500/20 border border-blue-500/20 text-blue-400 rounded-xl text-sm transition-all"
             >
-              <LogIn size={16} /> 登录
+              <LogIn size={16} /> {copy.signIn}
             </Link>
           )}
         </div>
@@ -1521,11 +1681,11 @@ export function AccountCenter() {
               <span
                 className={`px-2 py-0.5 rounded-full text-[10px] font-black uppercase tracking-tighter border ${isSubscribed ? "bg-blue-500/20 border-blue-500/40 text-blue-400" : "bg-slate-700/50 border-white/10 text-slate-500"}`}
               >
-                {isSubscribed ? "PRO MEMBER" : "FREE TIER"}
+                {isSubscribed ? copy.proMember : copy.freeTier}
               </span>
             </div>
             <p className="text-slate-500 font-mono text-sm mb-4">
-              {email || "游客用户"}
+              {email || copy.guestUser}
             </p>
             <div className="flex flex-wrap justify-center md:justify-start gap-4">
               <div className="flex items-center gap-1.5 text-slate-400 text-xs">
@@ -1535,14 +1695,17 @@ export function AccountCenter() {
                 </span>
               </div>
               <div className="flex items-center gap-1.5 text-slate-400 text-xs">
-                <Clock size={14} /> <span>加入时间: {joinedAt}</span>
+                <Clock size={14} />{" "}
+                <span>
+                  {copy.joinedAt}: {joinedAt}
+                </span>
               </div>
             </div>
           </div>
           <div className="flex flex-col gap-3">
             <div className="px-6 py-4 bg-black/40 rounded-2xl border border-white/5 text-center min-w-[140px]">
               <p className="text-[10px] text-slate-500 uppercase tracking-widest mb-1">
-                总积分 (荣誉)
+                {copy.totalPoints}
               </p>
               <p className="text-xl font-bold text-white flex items-center justify-center gap-2">
                 <Coins size={16} className="text-yellow-500" />{" "}
@@ -1551,7 +1714,7 @@ export function AccountCenter() {
             </div>
             <div className="px-6 py-4 bg-blue-500/10 rounded-2xl border border-blue-500/20 text-center min-w-[140px]">
               <p className="text-[10px] text-blue-400 uppercase tracking-widest mb-1 font-bold">
-                周排行 (竞技)
+                {copy.weeklyRank}
               </p>
               <p className="text-xl font-bold text-white flex items-center justify-center gap-2">
                 <Trophy size={16} className="text-amber-400" /> #{weeklyRank}
@@ -1564,7 +1727,8 @@ export function AccountCenter() {
         <div className="lg:col-span-4 bg-gradient-to-br from-indigo-600/20 to-purple-600/20 border border-indigo-500/30 rounded-[2.5rem] p-6 flex flex-col justify-between shadow-xl">
           <div>
             <h3 className="text-lg font-bold flex items-center gap-2 text-white mb-6">
-              <Sparkles size={20} className="text-yellow-400" /> 周榜奖励
+              <Sparkles size={20} className="text-yellow-400" />{" "}
+              {copy.weeklyRewards}
             </h3>
             <div className="space-y-3">
               <div className="flex items-center justify-between p-3 bg-white/5 rounded-xl border border-white/5">
@@ -1617,49 +1781,49 @@ export function AccountCenter() {
           >
             <section className="bg-white/5 border border-white/10 rounded-[2rem] p-6 space-y-3">
               <h3 className="text-sm font-bold text-blue-400 uppercase tracking-widest mb-4">
-                会员权限详情
+                {copy.membershipDetails}
               </h3>
-              <InfoRow icon={ShieldCheck} label="鉴权模式" value="Supabase" />
+              <InfoRow icon={ShieldCheck} label={copy.authMode} value="Supabase" />
-              <InfoRow icon={BarChart3} label="气象引擎" value="DEB + 多模型" />
+              <InfoRow icon={BarChart3} label={copy.weatherEngine} value="DEB + 多模型" />
               <InfoRow
                 icon={Zap}
-                label="今日内分析"
+                label={copy.intradayAnalysis}
-                value={isSubscribed ? "深度版（含高温时段）" : "简版可见"}
+                value={isSubscribed ? copy.deepMode : copy.compactVisible}
                 isPrimary={isSubscribed}
               />
               <InfoRow
                 icon={Clock}
-                label="历史对账 + 未来日期分析"
+                label={copy.historyFuture}
-                value={isSubscribed ? "已开启" : "锁定"}
+                value={isSubscribed ? copy.enabled : copy.locked}
                 isPrimary={isSubscribed}
               />
               <InfoRow
                 icon={Bot}
-                label="全平台智能气象推送"
+                label={copy.smartPush}
-                value={isSubscribed ? "已开启" : "锁定"}
+                value={isSubscribed ? copy.enabled : copy.locked}
                 isPrimary={isSubscribed}
               />
             </section>
             <section className="bg-white/5 border border-white/10 rounded-[2rem] p-6 space-y-3">
               <h3 className="text-sm font-bold text-indigo-400 uppercase tracking-widest mb-4">
-                身份状态
+                {copy.identityStatus}
               </h3>
-              <InfoRow icon={Mail} label="绑定邮箱" value={email || "--"} />
+              <InfoRow icon={Mail} label={copy.boundEmail} value={email || "--"} />
               <InfoRow
                 icon={LogIn}
-                label="登录方式"
+                label={copy.loginMethod}
                 value={user?.app_metadata?.provider?.toUpperCase() || "GOOGLE"}
               />
               <InfoRow
                 icon={Clock}
-                label="续费日期"
+                label={copy.renewalDate}
                 value={proExpiry}
                 isPrimary
               />
               <InfoRow
                 icon={UserCheck}
-                label="鉴权结果"
+                label={copy.authResult}
-                value={backend?.authenticated ? "通过" : "受限"}
+                value={backend?.authenticated ? copy.passed : copy.restricted}
               />
             </section>
           </div>
@@ -1685,7 +1849,7 @@ export function AccountCenter() {
                 onClose={() => setShowOverlay(false)}
                 payBusy={paymentBusy}
                 payLabel={
-                  hasPayingWallet ? "立即订阅并激活服务" : "连接钱包并支付"
+                  hasPayingWallet ? copy.payNow : copy.connectAndPay
                 }
                 errorText={paymentError || undefined}
                 infoText={paymentInfo || undefined}
@@ -1708,10 +1872,10 @@ export function AccountCenter() {
             />
             <div className="relative z-10">
               <h3 className="text-lg font-bold mb-2 flex items-center gap-2 text-blue-400">
-                <Bot size={22} /> Telegram Bot 绑定
+                <Bot size={22} /> {copy.telegramBind}
               </h3>
               <p className="text-slate-400 text-sm mb-6">
-                将下方命令发送给polyweather机器人，实现全平台气象推送与权限同步。
+                {copy.telegramHint}
               </p>
               <div className="flex gap-2">
                 <code className="flex-grow bg-black/40 border border-white/10 p-4 rounded-xl font-mono text-xs text-blue-300 overflow-hidden text-ellipsis whitespace-nowrap">
@@ -1720,7 +1884,8 @@ export function AccountCenter() {
                 <button
                   onClick={() => handleCopy(bindCommand)}
                   className="p-4 bg-blue-600 hover:bg-blue-500 rounded-xl transition-all shadow-lg text-white"
-                  title="复制命令"
+                  title={copy.copyCommand}
+                  aria-label={copy.copyCommand}
                 >
                   {copied ? <CheckCircle2 size={20} /> : <Copy size={20} />}
                 </button>
@@ -1732,12 +1897,12 @@ export function AccountCenter() {
           <section className="w-full md:w-96 bg-white/5 border border-white/10 rounded-[2rem] p-8 flex flex-col justify-between">
             <div>
               <h3 className="text-blue-400 text-sm font-bold uppercase tracking-widest mb-6 flex items-center gap-2">
-                <Wallet size={18} /> 支付管理
+                <Wallet size={18} /> {copy.paymentMgmt}
               </h3>
               {availableTokenList.length > 0 && (
                 <div className="mb-5">
                   <p className="text-[11px] uppercase tracking-widest text-slate-500 mb-2">
-                    支付币种
+                    {copy.paymentToken}
                   </p>
                   <div className="grid grid-cols-2 gap-2">
                     {availableTokenList.map((token) => {
@@ -1781,17 +1946,28 @@ export function AccountCenter() {
                         </span>
                         {w.is_primary && (
                           <span className="text-[8px] bg-blue-500 px-1 rounded">
-                            Primary
+                            {copy.primary}
                           </span>
                         )}
                       </div>
-                      <div className="text-[10px]">Polygon Chain</div>
+                      <div className="text-[10px]">{copy.polygonChain}</div>
+                      <div className="mt-2 flex justify-end">
+                        <button
+                          type="button"
+                          onClick={() => void handleUnbindWallet(w.address)}
+                          disabled={paymentBusy}
+                          className="inline-flex items-center gap-1 rounded-md border border-red-500/30 bg-red-500/10 px-2 py-1 text-[10px] font-semibold text-red-300 transition-all hover:bg-red-500/20 disabled:opacity-50"
+                        >
+                          <Minus size={12} />
+                          {copy.unbind}
+                        </button>
+                      </div>
                     </div>
                   ))}
                 </div>
               ) : (
                 <p className="text-xs text-slate-500 italic">
-                  未绑定任何收件钱包
+                  {copy.noWallet}
                 </p>
               )}
             </div>
@@ -1805,7 +1981,7 @@ export function AccountCenter() {
                 disabled={paymentBusy || !isAuthenticated}
                 className="w-full py-3 border border-white/10 bg-white/5 hover:bg-white/10 rounded-xl text-xs font-bold text-slate-300 transition-all flex items-center justify-center gap-2 disabled:opacity-60"
               >
-                <PlusIcon className="w-4 h-4" /> 绑定浏览器钱包（EVM扩展）
+                <PlusIcon className="w-4 h-4" /> {copy.bindExt}
               </button>
               <button
                 onClick={() => {
@@ -1817,11 +1993,11 @@ export function AccountCenter() {
                 }
                 className="w-full py-3 border border-cyan-400/30 bg-cyan-500/10 hover:bg-cyan-500/20 rounded-xl text-xs font-bold text-cyan-300 transition-all flex items-center justify-center gap-2 disabled:opacity-60"
               >
-                <CreditCard className="w-4 h-4" /> 扫码绑定（WalletConnect）
+                <CreditCard className="w-4 h-4" /> {copy.bindQr}
               </button>
               {!walletConnectEnabled && (
                 <p className="text-[11px] text-slate-500">
-                  未启用 WalletConnect：请配置
+                  {copy.walletConnectMissing}
                   <code className="mx-1">
                     NEXT_PUBLIC_WALLETCONNECT_PROJECT_ID
                   </code>

frontend/components/auth/LoginClient.tsx

@@ -17,6 +17,7 @@ import {
   getSupabaseBrowserClient,
   hasSupabasePublicEnv,
 } from "@/lib/supabase/client";
+import { useI18n } from "@/hooks/useI18n";
 
 type Mode = "login" | "signup";
 
@@ -26,6 +27,7 @@ type LoginClientProps = {
 
 export function LoginClient({ nextPath }: LoginClientProps) {
   const router = useRouter();
+  const { locale } = useI18n();
   const [mode, setMode] = useState<Mode>("login");
   const [email, setEmail] = useState("");
   const [password, setPassword] = useState("");
@@ -34,6 +36,42 @@ export function LoginClient({ nextPath }: LoginClientProps) {
   const [infoText, setInfoText] = useState("");
 
   const supabaseReady = hasSupabasePublicEnv();
+  const isEn = locale === "en-US";
+  const copy = {
+    backHome: isEn ? "Back to Home" : "返回首页",
+    subtitle: isEn
+      ? "Explore weather details from every corner of the world"
+      : "探索世界每一个角落的气象细节",
+    googleOneClick: isEn
+      ? "Continue with Google"
+      : "使用 Google 账号一键登录",
+    orEmail: isEn ? "Or continue with email" : "或使用邮箱",
+    login: isEn ? "Sign In" : "登录",
+    signup: isEn ? "Sign Up" : "注册",
+    passwordLoginPlaceholder: isEn ? "Enter password" : "输入密码",
+    passwordSignupPlaceholder: isEn
+      ? "Set at least 6 characters"
+      : "设置至少 6 位密码",
+    loginSubmit: isEn ? "Start your weather journey" : "开启天气之旅",
+    signupSubmit: isEn ? "Create account now" : "立即创建账号",
+    loginHint: isEn
+      ? "After signing in, your homepage will be personalized."
+      : "登录后将为您个性化定制首页数据",
+    signupHint: isEn
+      ? "By signing up, you agree to our Terms of Service."
+      : "注册即代表同意我们的服务条款",
+    realtime: isEn ? "Realtime data" : "实时数据",
+    highPrecision: isEn ? "High-precision forecast" : "高精度预测",
+    supabaseMissing: isEn
+      ? "Supabase is not configured. Sign-in is unavailable."
+      : "Supabase 未配置，无法使用登录",
+    needEmailPassword: isEn
+      ? "Please enter email and password."
+      : "请输入邮箱和密码",
+    signupCheckEmail: isEn
+      ? "Sign-up successful. Please verify your email before signing in."
+      : "注册成功，请检查邮箱并完成验证后登录。",
+  } as const;
 
   useEffect(() => {
     if (!supabaseReady) return;
@@ -53,7 +91,7 @@ export function LoginClient({ nextPath }: LoginClientProps) {
     setErrorText("");
     setInfoText("");
     if (!supabaseReady) {
-      setErrorText("Supabase 未配置，无法使用登录");
+      setErrorText(copy.supabaseMissing);
       return;
     }
 
@@ -82,11 +120,11 @@ export function LoginClient({ nextPath }: LoginClientProps) {
     setErrorText("");
     setInfoText("");
     if (!supabaseReady) {
-      setErrorText("Supabase 未配置，无法使用登录");
+      setErrorText(copy.supabaseMissing);
       return;
     }
     if (!email.trim() || !password.trim()) {
-      setErrorText("请输入邮箱和密码");
+      setErrorText(copy.needEmailPassword);
       return;
     }
 
@@ -124,7 +162,7 @@ export function LoginClient({ nextPath }: LoginClientProps) {
         router.replace(nextPath);
         return;
       }
-      setInfoText("注册成功，请检查邮箱并完成验证后登录。");
+      setInfoText(copy.signupCheckEmail);
     } finally {
       setLoading(false);
     }
@@ -141,18 +179,17 @@ export function LoginClient({ nextPath }: LoginClientProps) {
         <Link
           href="/"
           className="group absolute left-6 top-6 rounded-full border border-white/10 bg-white/5 p-2 text-slate-400 transition-all hover:bg-white/10 hover:text-white active:scale-90"
-          title="返回首页"
+          title={copy.backHome}
-          aria-label="返回首页"
+          aria-label={copy.backHome}
         >
           <ChevronLeft className="h-5 w-5 transition-transform group-hover:-translate-x-0.5" />
         </Link>
-
         <div className="mb-8 flex flex-col items-center">
           <div className="mb-4 flex h-16 w-16 items-center justify-center rounded-2xl bg-gradient-to-tr from-blue-500 to-indigo-400 shadow-lg shadow-blue-500/20">
             <Cloud className="h-10 w-10 text-white" />
           </div>
           <h1 className="text-3xl font-bold tracking-tight text-white">PolyWeather</h1>
-          <p className="mt-2 text-sm text-slate-400">探索世界每一个角落的气象细节</p>
+          <p className="mt-2 text-sm text-slate-400">{copy.subtitle}</p>
         </div>
 
         <button
@@ -162,13 +199,13 @@ export function LoginClient({ nextPath }: LoginClientProps) {
           className="mb-6 flex w-full items-center justify-center rounded-xl bg-white px-4 py-3.5 font-semibold text-slate-900 shadow-lg transition-all duration-200 hover:bg-slate-100 active:scale-[0.98] disabled:cursor-not-allowed disabled:opacity-70"
         >
           <Chrome className="mr-3 h-5 w-5" />
-          使用 Google 账号一键登录
+          {copy.googleOneClick}
         </button>
 
         <div className="my-6 flex items-center">
           <div className="h-[1px] flex-grow bg-white/10" />
           <span className="px-4 text-xs font-medium uppercase tracking-widest text-slate-500">
-            或使用邮箱
+            {copy.orEmail}
           </span>
           <div className="h-[1px] flex-grow bg-white/10" />
         </div>
@@ -183,7 +220,7 @@ export function LoginClient({ nextPath }: LoginClientProps) {
                 : "text-slate-400 hover:text-slate-200"
             }`}
           >
-            登录
+            {copy.login}
           </button>
           <button
             type="button"
@@ -194,7 +231,7 @@ export function LoginClient({ nextPath }: LoginClientProps) {
                 : "text-slate-400 hover:text-slate-200"
             }`}
           >
-            注册
+            {copy.signup}
           </button>
         </div>
 
@@ -218,7 +255,11 @@ export function LoginClient({ nextPath }: LoginClientProps) {
               minLength={6}
               value={password}
               onChange={(event) => setPassword(event.target.value)}
-              placeholder={isLogin ? "输入密码" : "设置至少 6 位密码"}
+              placeholder={
+                isLogin
+                  ? copy.passwordLoginPlaceholder
+                  : copy.passwordSignupPlaceholder
+              }
               className="w-full rounded-xl border border-white/10 bg-white/5 py-3.5 pl-12 pr-4 text-white placeholder:text-slate-600 transition-all focus:border-blue-500/50 focus:outline-none focus:ring-2 focus:ring-blue-500/50"
             />
           </div>
@@ -228,7 +269,7 @@ export function LoginClient({ nextPath }: LoginClientProps) {
             disabled={loading}
             className="group mt-8 flex w-full items-center justify-center rounded-xl bg-gradient-to-r from-blue-600 to-indigo-600 py-3.5 font-bold text-white shadow-xl shadow-blue-600/20 transition-all hover:from-blue-500 hover:to-indigo-500 active:scale-[0.98] disabled:cursor-not-allowed disabled:opacity-70"
           >
-            {isLogin ? "开启天气之旅" : "立即创建账号"}
+            {isLogin ? copy.loginSubmit : copy.signupSubmit}
             <ArrowRight className="ml-2 h-5 w-5 transition-transform group-hover:translate-x-1" />
           </button>
         </form>
@@ -238,23 +279,21 @@ export function LoginClient({ nextPath }: LoginClientProps) {
 
         <div className="mt-8 text-center">
           <p className="text-xs text-slate-500">
-            {isLogin ? "登录后将为您个性化定制首页数据" : "注册即代表同意我们的服务条款"}
+            {isLogin ? copy.loginHint : copy.signupHint}
           </p>
         </div>
 
         {!supabaseReady ? (
-          <p className="mt-3 text-center text-sm text-rose-300">
+          <p className="mt-3 text-center text-sm text-rose-300">{copy.supabaseMissing}</p>
-            Supabase 未配置，无法使用登录
-          </p>
         ) : null}
       </div>
 
       <div className="absolute bottom-8 flex items-center gap-4 text-sm text-slate-600">
         <span className="flex items-center">
-          <Sun className="mr-1 h-4 w-4" /> 实时数据
+          <Sun className="mr-1 h-4 w-4" /> {copy.realtime}
         </span>
         <span className="flex items-center">
-          <CloudRain className="mr-1 h-4 w-4" /> 高精度预测
+          <CloudRain className="mr-1 h-4 w-4" /> {copy.highPrecision}
         </span>
       </div>
     </div>

src/payments/contract_checkout.py

@@ -1119,6 +1119,86 @@ class PaymentContractCheckoutService:
             verified_at=now_iso,
         )
 
+    def unbind_wallet(self, user_id: str, address: str) -> Dict[str, Any]:
+        self._ensure_enabled()
+        normalized = _normalize_address(address)
+        if not normalized:
+            raise PaymentCheckoutError(400, "invalid wallet address")
+
+        # Must be an active wallet owned by current user.
+        self._require_user_wallet(user_id, normalized)
+
+        now_iso = _to_iso(_now_utc())
+        self._rest(
+            "PATCH",
+            "user_wallets",
+            params={
+                "user_id": f"eq.{user_id}",
+                "chain_id": f"eq.{self.chain_id}",
+                "address": f"eq.{normalized}",
+            },
+            payload={
+                "status": "revoked",
+                "is_primary": False,
+                "updated_at": now_iso,
+            },
+            prefer="return=representation",
+            allowed_status=[200],
+        )
+
+        # Ensure there is still an active primary wallet after unbind.
+        active_primary_rows = self._rest(
+            "GET",
+            "user_wallets",
+            params={
+                "select": "id,address",
+                "user_id": f"eq.{user_id}",
+                "chain_id": f"eq.{self.chain_id}",
+                "status": "eq.active",
+                "is_primary": "eq.true",
+                "limit": "1",
+            },
+            allowed_status=[200],
+        )
+
+        new_primary = ""
+        if isinstance(active_primary_rows, list) and active_primary_rows:
+            new_primary = _normalize_address(active_primary_rows[0].get("address") or "")
+        else:
+            active_wallet_rows = self._rest(
+                "GET",
+                "user_wallets",
+                params={
+                    "select": "id,address",
+                    "user_id": f"eq.{user_id}",
+                    "chain_id": f"eq.{self.chain_id}",
+                    "status": "eq.active",
+                    "order": "verified_at.desc,updated_at.desc",
+                    "limit": "1",
+                },
+                allowed_status=[200],
+            )
+            if isinstance(active_wallet_rows, list) and active_wallet_rows:
+                candidate = active_wallet_rows[0]
+                candidate_id = candidate.get("id")
+                candidate_addr = _normalize_address(candidate.get("address") or "")
+                if candidate_id and candidate_addr:
+                    self._rest(
+                        "PATCH",
+                        "user_wallets",
+                        params={"id": f"eq.{candidate_id}"},
+                        payload={"is_primary": True, "updated_at": now_iso},
+                        prefer="return=representation",
+                        allowed_status=[200],
+                    )
+                    new_primary = candidate_addr
+
+        return {
+            "address": normalized,
+            "unbound": True,
+            "new_primary": new_primary or None,
+        }
+
     def _select_plan(self, plan_code: str) -> Dict[str, Any]:
         code = str(plan_code or "").strip().lower() or "pro_monthly"
         row = self.plan_catalog.get(code)

web/app.py

@@ -261,6 +261,10 @@ class WalletVerifyRequest(BaseModel):
     signature: str = Field(..., min_length=20)
 
 
+class WalletUnbindRequest(BaseModel):
+    address: str = Field(..., min_length=8)
+
+
 class CreatePaymentIntentRequest(BaseModel):
     plan_code: str = Field(default="pro_monthly", min_length=2)
     payment_mode: str = Field(default="strict")
@@ -1226,6 +1230,19 @@ async def payment_wallets(request: Request):
         raise HTTPException(status_code=exc.status_code, detail=exc.detail) from exc
 
 
+@app.delete("/api/payments/wallets")
+async def payment_wallet_unbind(request: Request, body: WalletUnbindRequest):
+    _assert_entitlement(request)
+    identity = _require_supabase_identity(request)
+    try:
+        return PAYMENT_CHECKOUT.unbind_wallet(
+            user_id=identity["user_id"],
+            address=body.address,
+        )
+    except PaymentCheckoutError as exc:
+        raise HTTPException(status_code=exc.status_code, detail=exc.detail) from exc
+
+
 @app.post("/api/payments/wallets/challenge")
 async def payment_wallet_challenge(request: Request, body: WalletChallengeRequest):
     _assert_entitlement(request)