feat(chat): handle daily message paywall

src/app/chat/chat-screen.tsx

@@ -1,7 +1,5 @@
 "use client";
-/**
- * ChatScreen 编排层
- */
+
 import { useEffect, useRef, useState } from "react";
 import Image from "next/image";
 
@@ -50,8 +48,13 @@ export function ChatScreen() {
   // - quotaExceededTrigger 而非 guestTotalQuota / guestRemainingQuota ——
   //   trigger 由 chat 机器的 guard 在 ChatSendMessage / ChatSendImage 被拦截时 +1，
   //   是 "用户被配额拒绝过" 的权威信号（避免依赖 quota 数值本身的边界判断）
-  const showExhaustedBanner =
+  const showGuestQuotaBanner =
     isGuest && state.quotaLoaded && state.quotaExceededTrigger > 0;
+  const showDailyLimitBanner =
+    !isGuest &&
+    state.paywallTriggered &&
+    state.paywallReason === "daily_limit";
+  const showExhaustedBanner = showGuestQuotaBanner || showDailyLimitBanner;
 
   const externalBrowserPromptShownRef = useRef(false);
 

src/app/chat/components/chat-quota-exhausted-banner.tsx

@@ -45,7 +45,7 @@ export function ChatQuotaExhaustedBanner({
       onUnlock();
       return;
     }
-    router.push(ROUTES.auth);
+    router.push(`${ROUTES.subscription}?type=vip`);
   };
 
   return (