refactor(chat): remove QuotaDialog and related state/effects

Drop the QuotaDialog component invocation in chat-screen along with
its useState/useEffect wiring, and delete the component files. Update
JSDoc in chat-screen and routes to reflect the removed consumer.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

src/app/chat/components/chat-screen.tsx

@@ -7,14 +7,12 @@
  * 职责（本文件）：
  *   - **订阅 auth 状态机**（loginStatus）—— 派生 isGuest / **派鉴权生命周期事件**给 chat 机器
  *   - 屏幕生命周期事件（init / visible / invisible）
- *   - 配额告警监听（**仅**游客 —— "非游客无消息限制"业务事实）
  *   - **不**直接管理 WebSocket / **不**直接读 AuthStorage（除 token 取值）
  *
  * 子组件职责：
  *   - ChatHeader：顶部栏（游客 banner / 菜单按钮）
  *   - ChatArea：消息列表
  *   - ChatInputBar：输入栏（文字 + 发送 + More）
- *   - QuotaDialog：配额告警弹窗（**仅**游客）
  *   - PwaInstallOverlay：PWA 安装提示触发器
  *   - BrowserHintOverlay：浏览器提示
  *
@@ -26,14 +24,13 @@
  *     - `ChatLogout` → 登出（机器自动 cleanup WS actor）
  *   - chat 机器**内部**用 fromCallback actor 完整管理 WS 生命周期
  */
-import { useEffect, useRef, useState } from "react";
+import { useEffect, useRef } from "react";
 import Image from "next/image";
 
 import { useAuthState } from "@/stores/auth/auth-context";
 import type { LoginStatus } from "@/models/auth/login-status";
 import { AuthStorage } from "@/data/storage/auth/auth_storage";
 import { useChatDispatch, useChatState } from "@/stores/chat/chat-context";
-import { GuestChatQuota } from "@/stores/chat";
 
 import { MobileShell } from "@/app/_components/core/mobile-shell";
 
@@ -42,7 +39,6 @@ import { ChatArea } from "./chat-area";
 import { ChatHeader } from "./chat-header";
 import { ChatInputBar } from "./chat-input-bar";
 import { PwaInstallOverlay } from "./pwa-install-overlay";
-import { QuotaDialog } from "./quota-dialog";
 import styles from "./chat-screen.module.css";
 
 /**
@@ -88,9 +84,6 @@ export function ChatScreen() {
   // isGuest 派生（chat-screen 是**唯一**知道这个值的地方 —— chat 机器无 isGuest 字段）
   const isGuest = deriveIsGuest(authState.loginStatus);
 
-  const [quotaDialogOpen, setQuotaDialogOpen] = useState(false);
-  const [quotaExhausted, setQuotaExhausted] = useState(false);
-
   // ─────────────────────────────────────────────────────────────
   // 屏幕生命周期 + 派初次鉴权生命周期事件
   // ─────────────────────────────────────────────────────────────
@@ -121,36 +114,6 @@ export function ChatScreen() {
     dispatchAuthLifecycle(authState.loginStatus, chatDispatch);
   }, [authState.loginStatus, chatDispatch]);
 
-  // ─────────────────────────────────────────────────────────────
-  // 配额耗尽触发器（**仅**游客 —— "非游客无消息限制"）
-  // ─────────────────────────────────────────────────────────────
-  const prevTriggerRef = useRef(state.quotaExceededTrigger);
-  useEffect(() => {
-    if (!isGuest) return; // ← 防御：非游客 backend 不会发 ChatQuotaExceeded
-    if (
-      state.quotaExceededTrigger !== prevTriggerRef.current &&
-      state.quotaExceededTrigger > 0
-    ) {
-      setQuotaExhausted(true);
-      setQuotaDialogOpen(true);
-    }
-    prevTriggerRef.current = state.quotaExceededTrigger;
-  }, [state.quotaExceededTrigger, isGuest]);
-
-  // 配额警告（剩余 = 5）—— **仅**游客
-  const prevRemainingRef = useRef(state.guestRemainingQuota);
-  useEffect(() => {
-    if (
-      isGuest && // ← 派生自 auth.loginStatus
-      state.guestRemainingQuota === GuestChatQuota.warningThreshold &&
-      prevRemainingRef.current !== state.guestRemainingQuota
-    ) {
-      setQuotaExhausted(false);
-      setQuotaDialogOpen(true);
-    }
-    prevRemainingRef.current = state.guestRemainingQuota;
-  }, [state.guestRemainingQuota, isGuest]);
-
   return (
     <MobileShell>
       <div className={styles.shell}>
@@ -183,13 +146,6 @@ export function ChatScreen() {
 
         {/* PWA 安装提示触发器（无可见 UI，3.5s 后弹 dialog） */}
         <PwaInstallOverlay />
-
-        {/* 配额告警弹窗（**仅**游客，gate 在 isGuest） */}
-        <QuotaDialog
-          open={quotaDialogOpen}
-          onClose={() => setQuotaDialogOpen(false)}
-          isExhausted={quotaExhausted}
-        />
       </div>
     </MobileShell>
   );

src/app/chat/components/quota-dialog.module.css

@@ -1,85 +0,0 @@
-/* QuotaDialog 配额提示弹窗样式 */
-
-.overlay {
-  position: fixed;
-  inset: 0;
-  background: rgba(0, 0, 0, 0.5);
-  display: flex;
-  align-items: center;
-  justify-content: center;
-  z-index: 50;
-}
-
-.dialog {
-  width: calc(100% - 40px);
-  max-width: 360px;
-  background: var(--color-surface, #1f1a2e);
-  border-radius: var(--radius-lg, 12px);
-  padding: var(--spacing-5, 20px);
-  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
-  display: flex;
-  flex-direction: column;
-  align-items: center;
-  text-align: center;
-}
-
-.icon {
-  width: 64px;
-  height: 64px;
-  border-radius: 50%;
-  display: flex;
-  align-items: center;
-  justify-content: center;
-  font-size: 32px;
-  margin-bottom: var(--spacing-4, 16px);
-}
-
-.iconExhausted {
-  background: rgba(255, 80, 80, 0.2);
-  color: #ff5050;
-}
-
-.iconWarning {
-  background: rgba(248, 77, 150, 0.2);
-  color: var(--color-accent, #f84d96);
-}
-
-.title {
-  font-size: var(--font-size-lg, 18px);
-  font-weight: 600;
-  margin: 0 0 var(--spacing-2, 8px);
-  color: var(--color-text-primary, #fff);
-}
-
-.content {
-  font-size: var(--font-size-sm, 14px);
-  line-height: 1.5;
-  color: var(--color-text-secondary, #9e9e9e);
-  margin: 0 0 var(--spacing-5, 20px);
-}
-
-.actions {
-  display: flex;
-  gap: var(--spacing-3, 12px);
-  width: 100%;
-}
-
-.btn {
-  flex: 1 1 auto;
-  height: 40px;
-  border: 0;
-  border-radius: var(--radius-md, 8px);
-  font-size: var(--font-size-base, 14px);
-  font-weight: 600;
-  cursor: pointer;
-}
-
-.btnSecondary {
-  background: transparent;
-  color: var(--color-text-primary, #fff);
-}
-
-.btnPrimary {
-  background: var(--color-accent, #f84d96);
-  color: #fff;
-}

src/app/chat/components/quota-dialog.tsx

@@ -1,80 +0,0 @@
-"use client";
-/**
- * QuotaDialog 配额提示弹窗
- *
- * 原始 Dart: lib/ui/chat/widgets/quota_dialog.dart（130 行）
- *
- * 两种模式：
- *   - 警告模式（isExhausted=false）：剩余配额 < 5 时，提示用户登录
- *   - 耗尽模式（isExhausted=true）：配额已用完，强制登录
- */
-import { useRouter } from "next/navigation";
-
-import { ROUTES } from "@/router/routes";
-
-import styles from "./quota-dialog.module.css";
-
-export interface QuotaDialogProps {
-  open: boolean;
-  onClose: () => void;
-  isExhausted: boolean;
-}
-
-export function QuotaDialog({ open, onClose, isExhausted }: QuotaDialogProps) {
-  const router = useRouter();
-
-  if (!open) return null;
-
-  const title = isExhausted
-    ? "Daily quota exhausted"
-    : "Login for unlimited access!";
-
-  const content = isExhausted
-    ? "Login to continue chatting~"
-    : "Dear, sign up now and all your chats with Elio will be saved forever. In guest mode, your chat history will be deleted when you leave, and Elio will forget you.";
-
-  const handleLogin = () => {
-    onClose();
-    router.push(ROUTES.auth);
-  };
-
-  return (
-    <div
-      className={styles.overlay}
-      role="dialog"
-      aria-modal="true"
-      aria-labelledby="quota-dialog-title"
-    >
-      <div className={styles.dialog}>
-        <div
-          className={`${styles.icon} ${isExhausted ? styles.iconExhausted : styles.iconWarning}`}
-          aria-hidden="true"
-        >
-          {isExhausted ? "🚫" : "⚠️"}
-        </div>
-
-        <h2 id="quota-dialog-title" className={styles.title}>
-          {title}
-        </h2>
-        <p className={styles.content}>{content}</p>
-
-        <div className={styles.actions}>
-          <button
-            type="button"
-            className={`${styles.btn} ${styles.btnSecondary}`}
-            onClick={onClose}
-          >
-            Cancel
-          </button>
-          <button
-            type="button"
-            className={`${styles.btn} ${styles.btnPrimary}`}
-            onClick={handleLogin}
-          >
-            Go to Login
-          </button>
-        </div>
-      </div>
-    </div>
-  );
-}

src/router/routes.ts

@@ -10,7 +10,7 @@
  *  - 动态深链通过 `ROUTE_BUILDERS` 函数生成，避免手拼字符串。
  *
  * 注意：proxy 路由跳转逻辑（2026-06-15 迁出），但本文件的**类型化常量**仍在
- * 被 9 个组件（auth-screen / chat-header / quota-dialog / DeepLinkPersist /
+ * 被 8 个组件（auth-screen / chat-header / DeepLinkPersist /
  * error / not-found / page / sidebar-screen / splash-screen）使用 —— **不能**整体注释。
  */