feat: P0d 会员定价页重构 — 用量可视化 + 方案对比

- 三栏定价卡片（免费/月卡/年卡），参考 opencode Go 页面风格
- 日配额用量进度条
- 功能对比表（沙盒/模型/提示词/课程/广告）
- 当前方案标记 + 最受欢迎标记
- useT 全量翻译
- 补充中/英 30+ 定价相关翻译 key

frontend/src/app/my/member/page.tsx

@@ -4,61 +4,58 @@ import { useEffect, useState } from 'react';
 import Link from 'next/link';
 import { apiFetch } from '../../../lib/auth';
 import { Skeleton } from '@/components/ui/skeleton';
+import { useT } from '@/i18n';
 
 interface Subscription {
-  id: number;
-  plan: string;
-  startDate: string;
-  endDate: string;
-  status: string;
+  id: number; plan: string; startDate: string; endDate: string; status: string;
 }
 
 interface Order {
-  id: number;
-  orderNo: string;
-  amount: number;
-  planType: string;
-  status: string;
-  createdAt: string;
+  id: number; orderNo: string; amount: number; planType: string; status: string; createdAt: string;
 }
 
+const PLANS = [
+  { id: 'FREE', nameKey: 'planFree' as const, price: 0, period: '', popular: false, features: ['featureSandboxFree', 'featureModelsFree', 'featurePromptsFree', 'featureCoursesFree', 'featureAdsFree'] as const },
+  { id: 'MONTHLY', nameKey: 'planMonthly' as const, price: 29.9, period: 'perMonth', popular: true, features: ['featureSandboxPro', 'featureModelsPro', 'featurePromptsPro', 'featureCoursesPro', 'featureAdsPro'] as const },
+  { id: 'YEARLY', nameKey: 'planYearly' as const, price: 199, period: 'perYear', popular: false, features: ['featureSandboxUnlimited', 'featureModelsPremium', 'featurePromptsPremium', 'featureCoursesPremium', 'featureAdsPremium'] as const },
+];
+
+const FEATURE_LABELS = ['featureSandbox', 'featureModels', 'featurePrompts', 'featureCourses', 'featureAds'] as const;
+
 export default function MemberPage() {
+  const t = useT();
   const [subscription, setSubscription] = useState<Subscription | null>(null);
   const [orders, setOrders] = useState<Order[]>([]);
+  const [quota, setQuota] = useState<{ used: number; remaining: number; dailyLimit: number } | null>(null);
   const [loading, setLoading] = useState(true);
-  const [payLoading, setPayLoading] = useState(false);
+  const [payLoading, setPayLoading] = useState<string | null>(null);
 
-  useEffect(() => {
-    loadData();
-  }, []);
+  useEffect(() => { loadData(); }, []);
 
   async function loadData() {
     try {
-      const [subRes, ordersRes] = await Promise.all([
+      const [subRes, ordersRes, quotaRes] = await Promise.all([
         apiFetch('/subscriptions/current').catch(() => ({ ok: false })),
         apiFetch('/orders'),
+        apiFetch('/sandbox/quota'),
       ]);
-      
-      if (subRes.ok) {
-        const subData = await subRes.json();
-        setSubscription(subData);
-      }
-      
+      if (subRes.ok) setSubscription(await subRes.json());
       const ordersData = await ordersRes.json();
       setOrders(ordersData.items || []);
+      const quotaData = await quotaRes.json();
+      if (quotaData.remaining !== undefined) setQuota(quotaData);
     } catch (e) { console.error(e) }
     setLoading(false);
   }
 
   async function handleSubscribe(planType: string) {
-    setPayLoading(true);
+    setPayLoading(planType);
     try {
       const res = await apiFetch('/orders/create', {
         method: 'POST',
         body: JSON.stringify({
           amount: planType === 'MONTHLY' ? 29.9 : 199,
-          planType,
-          payChannel: 'wxpay',
+          planType, payChannel: 'wxpay',
         }),
       });
       const data = await res.json();
@@ -67,91 +64,93 @@ export default function MemberPage() {
         loadData();
       }
     } catch (e) { console.error(e) }
-    setPayLoading(false);
+    setPayLoading(null);
   }
 
   if (loading) return (
     <div className="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8 py-12">
-      <Skeleton className="h-8 w-48 mb-6" />
-      <div className="grid grid-cols-1 md:grid-cols-3 gap-4 mb-8">
-        <Skeleton className="h-24 rounded-xl" />
-        <Skeleton className="h-24 rounded-xl" />
-        <Skeleton className="h-24 rounded-xl" />
+      <Skeleton className="h-8 w-48 mb-2" />
+      <Skeleton className="h-5 w-64 mb-8" />
+      <div className="grid grid-cols-1 md:grid-cols-3 gap-6 mb-8">
+        {[1,2,3].map(i => <Skeleton key={i} className="h-72 rounded-2xl" />)}
       </div>
-      <Skeleton className="h-64 w-full rounded-xl" />
     </div>
   );
 
   return (
     <div className="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8 py-12">
       <div className="mb-8">
-        <Link href="/my" className="text-sm text-muted-foreground hover:text-brand-600 mb-2 inline-block">
-          &larr; 返回我的
-        </Link>
-        <h1 className="text-3xl font-bold text-foreground">会员中心</h1>
-        <p className="mt-2 text-muted-foreground">管理你的会员订阅</p>
+        <Link href="/my" className="text-sm text-muted-foreground hover:text-brand-600 mb-2 inline-block">&larr; 返回我的</Link>
+        <h1 className="text-3xl font-bold text-foreground">{t.member.title}</h1>
+        <p className="mt-2 text-muted-foreground">{t.member.desc}</p>
       </div>
 
-      <div className="bg-card rounded-2xl border border-border p-6 mb-8">
-        <h2 className="text-lg font-semibold text-foreground mb-4">当前会员</h2>
-        {subscription ? (
-          <div>
-            <div className="flex items-center gap-3 mb-4">
-              <span className={`px-3 py-1 rounded-full text-sm font-medium ${
-                subscription.plan === 'YEARLY' ? 'bg-purple-100 text-purple-700' : 'bg-blue-100 text-blue-700'
-              }`}>
-                {subscription.plan === 'YEARLY' ? '年卡会员' : '月卡会员'}
-              </span>
-              <span className="text-sm text-muted-foreground">
-                到期时间：{new Date(subscription.endDate).toLocaleDateString()}
-              </span>
-            </div>
-            <div className="text-sm text-muted-foreground">
-              会员权益：全部课程 + 不限次沙箱 + 专属提示词库 + 去广告
-            </div>
+      {quota && (
+        <div className="bg-card rounded-2xl border border-border p-6 mb-8">
+          <div className="flex items-center justify-between mb-2">
+            <span className="text-sm font-medium text-foreground">{t.member.dailyQuota}</span>
+            <span className="text-sm text-muted-foreground">{t.member.used.replace('{n}', String(quota.used))} / {quota.dailyLimit}</span>
           </div>
-        ) : (
-          <div>
-            <p className="text-muted-foreground mb-4">你当前是免费用户</p>
-            <div className="flex gap-4">
-              <button
-                onClick={() => handleSubscribe('MONTHLY')}
-                disabled={payLoading}
-                className="px-6 py-3 bg-brand-600 text-white rounded-xl hover:bg-brand-700 disabled:opacity-50"
-              >
-                {payLoading ? '处理中...' : '开通月卡 ¥29.9/月'}
-              </button>
-              <button
-                onClick={() => handleSubscribe('YEARLY')}
-                disabled={payLoading}
-                className="px-6 py-3 border border-brand-600 text-brand-600 rounded-xl hover:bg-brand-50 disabled:opacity-50"
-              >
-                {payLoading ? '处理中...' : '开通年卡 ¥199/年'}
-              </button>
-            </div>
+          <div className="w-full bg-muted rounded-full h-3">
+            <div className="bg-brand-600 h-3 rounded-full transition-all" style={{ width: `${Math.min((quota.used / quota.dailyLimit) * 100, 100)}%` }} />
           </div>
-        )}
+        </div>
+      )}
+
+      <div className="grid grid-cols-1 md:grid-cols-3 gap-6 mb-8">
+        {PLANS.map(plan => {
+          const isCurrent = subscription?.plan === plan.id;
+          return (
+            <div key={plan.id} className={`bg-card rounded-2xl border-2 p-6 flex flex-col ${isCurrent ? 'border-brand-600' : plan.popular ? 'border-brand-400' : 'border-border'}`}>
+              {plan.popular && !isCurrent && (
+                <span className="self-start text-xs font-medium px-2 py-0.5 bg-brand-600 text-white rounded-full mb-3">{t.member.popular}</span>
+              )}
+              {isCurrent && (
+                <span className="self-start text-xs font-medium px-2 py-0.5 bg-green-600 text-white rounded-full mb-3">{t.member.currentPlan_badge}</span>
+              )}
+              <h3 className="text-lg font-semibold text-foreground mb-1">{t.member[plan.nameKey]}</h3>
+              <div className="mb-4">
+                {plan.price > 0 ? (
+                  <span className="text-3xl font-bold text-foreground">{plan.price === 29.9 ? t.member.priceMonthly : t.member.priceYearly}<span className="text-sm font-normal text-muted-foreground">{t.member[plan.period]}</span></span>
+                ) : (
+                  <span className="text-2xl font-bold text-foreground">¥0</span>
+                )}
+              </div>
+              <div className="space-y-2 flex-1 mb-6">
+                {(plan.id === 'FREE' ? FEATURE_LABELS : FEATURE_LABELS).map((f, fi) => (
+                  <div key={f} className="flex items-center gap-2 text-sm">
+                    <span className="text-green-600 text-xs">✓</span>
+                    <span className="text-muted-foreground">{t.member[f]}</span>
+                    <span className="ml-auto text-xs text-foreground font-medium">{t.member[plan.features[fi]]}</span>
+                  </div>
+                ))}
+              </div>
+              {plan.id !== 'FREE' && (
+                <button onClick={() => handleSubscribe(plan.id)} disabled={payLoading === plan.id || isCurrent}
+                  className={`w-full py-2.5 rounded-xl text-sm font-medium transition-all ${isCurrent ? 'bg-muted text-muted-foreground cursor-default' : plan.popular ? 'bg-brand-600 text-white hover:bg-brand-700' : 'border border-border text-foreground hover:bg-accent'} disabled:opacity-50`}>
+                  {payLoading === plan.id ? t.member.processing : isCurrent ? t.member.currentPlan_badge : t.member.subscribe}
+                </button>
+              )}
+            </div>
+          );
+        })}
       </div>
 
-      <div>
-        <h2 className="text-lg font-semibold text-foreground mb-4">订单记录</h2>
+      <div className="bg-card rounded-2xl border border-border p-6">
+        <h2 className="text-lg font-semibold text-foreground mb-4">{t.member.orderHistory}</h2>
         {orders.length === 0 ? (
-          <p className="text-muted-foreground text-center py-8">暂无订单记录</p>
+          <p className="text-muted-foreground text-center py-8">{t.member.noOrders}</p>
         ) : (
           <div className="space-y-3">
             {orders.map(order => (
-              <div key={order.id} className="bg-card rounded-xl border border-border p-4 flex items-center justify-between">
+              <div key={order.id} className="flex items-center justify-between p-4 rounded-xl border border-border">
                 <div>
-                  <div className="font-medium text-foreground">{order.planType === 'MONTHLY' ? '月卡会员' : '年卡会员'}</div>
+                  <div className="font-medium text-foreground">{t.member[order.planType === 'YEARLY' ? 'yearly' : 'monthly']}</div>
                   <div className="text-sm text-muted-foreground">{new Date(order.createdAt).toLocaleDateString()}</div>
                 </div>
                 <div className="text-right">
                   <div className="font-semibold text-foreground">¥{order.amount}</div>
-                  <span className={`text-xs px-2 py-0.5 rounded ${
-                    order.status === 'PAID' ? 'bg-green-100 text-green-700' : 
-                    order.status === 'PENDING' ? 'bg-yellow-100 text-yellow-700' : 
-                    'bg-muted text-muted-foreground'
-                  }`}>
+                  <span className={`text-xs px-2 py-0.5 rounded ${order.status === 'PAID' ? 'bg-green-100 text-green-700' : order.status === 'PENDING' ? 'bg-yellow-100 text-yellow-700' : 'bg-muted text-muted-foreground'}`}>
                     {order.status}
                   </span>
                 </div>

frontend/src/i18n/locales/en.ts

@@ -97,6 +97,38 @@ const en: Translations = {
     orderHistory: 'Order History',
     noOrders: 'No orders yet',
     processing: 'Processing...',
+    planFree: 'Free',
+    planMonthly: 'Monthly',
+    planYearly: 'Yearly',
+    priceMonthly: '¥29.9',
+    priceYearly: '¥199',
+    perMonth: '/mo',
+    perYear: '/yr',
+    popular: 'Most Popular',
+    featureSandbox: 'AI Sandbox',
+    featureSandboxFree: '10/day',
+    featureSandboxPro: '100/day',
+    featureSandboxUnlimited: 'Unlimited',
+    featureModels: 'Models',
+    featureModelsFree: '1 model',
+    featureModelsPro: '2 models',
+    featureModelsPremium: 'All models',
+    featurePrompts: 'Prompts',
+    featurePromptsFree: 'Basic',
+    featurePromptsPro: 'All',
+    featurePromptsPremium: 'All + Exclusive',
+    featureCourses: 'Courses',
+    featureCoursesFree: 'Some free',
+    featureCoursesPro: 'All',
+    featureCoursesPremium: 'All',
+    featureAds: 'Ads',
+    featureAdsFree: 'Yes',
+    featureAdsPro: 'Ad-free',
+    featureAdsPremium: 'Ad-free',
+    dailyQuota: 'Daily Quota Usage',
+    used: '{n} used',
+    subscribe: 'Subscribe',
+    currentPlan_badge: 'Current Plan',
   },
   compare: {
     title: 'Compare Lab',

frontend/src/i18n/locales/zh.ts

@@ -95,6 +95,38 @@ const zh = {
     orderHistory: '订单记录',
     noOrders: '暂无订单记录',
     processing: '处理中...',
+    planFree: '免费',
+    planMonthly: '月卡',
+    planYearly: '年卡',
+    priceMonthly: '¥29.9',
+    priceYearly: '¥199',
+    perMonth: '/月',
+    perYear: '/年',
+    popular: '最受欢迎',
+    featureSandbox: 'AI 沙盒',
+    featureSandboxFree: '10 次/日',
+    featureSandboxPro: '100 次/日',
+    featureSandboxUnlimited: '不限次',
+    featureModels: '模型选择',
+    featureModelsFree: '1 个模型',
+    featureModelsPro: '2 个模型',
+    featureModelsPremium: '全部模型',
+    featurePrompts: '提示词库',
+    featurePromptsFree: '基础',
+    featurePromptsPro: '全部',
+    featurePromptsPremium: '全部 + 专属',
+    featureCourses: '课程学习',
+    featureCoursesFree: '部分免费',
+    featureCoursesPro: '全部',
+    featureCoursesPremium: '全部',
+    featureAds: '广告',
+    featureAdsFree: '有广告',
+    featureAdsPro: '去广告',
+    featureAdsPremium: '去广告',
+    dailyQuota: '日配额用量',
+    used: '已用 {n} 次',
+    subscribe: '开通',
+    currentPlan_badge: '当前方案',
   },
   compare: {
     title: '对比实验室',