feat(navigation): add favorite entry and Menu tab

e2e/specs/mock/favorite-menu-navigation.spec.ts

@@ -0,0 +1,198 @@
+import path from "node:path";
+
+import { expect, test, type Page } from "@playwright/test";
+
+import { mockCoreApis } from "@e2e/fixtures/api-mocks";
+import { apiEnvelope } from "@e2e/fixtures/data/common";
+import { e2eEmailUser } from "@e2e/fixtures/data/auth";
+import { chatCharactersResponse } from "@e2e/fixtures/data/character";
+import {
+  emptyChatHistoryResponse,
+  emptyChatPreviewsResponse,
+} from "@e2e/fixtures/data/chat";
+import { paymentPlansResponse } from "@e2e/fixtures/data/payment";
+import { userEntitlementsResponse } from "@e2e/fixtures/data/user";
+import {
+  defaultCharacterChatPath,
+  defaultCharacterSplashPath,
+  seedEmailSession,
+} from "@e2e/fixtures/helpers/auth";
+
+const previewDirectory = path.join(
+  process.cwd(),
+  ".codex",
+  "artifacts",
+  "frontend-preview",
+  "2026-07-22",
+  "favorite-menu",
+);
+
+test.beforeEach(async ({ page }) => {
+  await registerFavoriteMenuMocks(page);
+});
+
+test("favorite entry and three-tab Menu navigation render on the real pages", async ({
+  page,
+}, testInfo) => {
+  const mobile = testInfo.project.name.includes("mobile");
+  await page.setViewportSize(
+    mobile ? { width: 390, height: 844 } : { width: 1440, height: 900 },
+  );
+  const browserErrors = collectBrowserErrors(page);
+
+  await seedEmailSession(page);
+  await page.goto(defaultCharacterChatPath);
+
+  await expect(page.getByRole("button", { name: "Save CozSweet" })).toBeVisible();
+  await expect(
+    page.getByRole("button", { name: /First recharge offer, 50% off/i }),
+  ).toBeVisible();
+  await expect(page.getByRole("button", { name: "Profile" })).toHaveCount(0);
+  await savePreview(page, `${mobile ? "mobile" : "desktop"}-chat.png`);
+
+  await page.goto(defaultCharacterSplashPath);
+  await expect(page.getByRole("button", { name: "Save CozSweet" })).toBeVisible();
+  await expect(page.getByRole("button", { name: "Menu" })).toBeVisible();
+  const navigation = page.getByRole("navigation", {
+    name: "Primary navigation",
+  });
+  await expect(navigation).toContainText("Chat");
+  await expect(navigation).toContainText("Elio Private Zoom");
+  await expect(navigation).toContainText("Menu");
+  await savePreview(page, `${mobile ? "mobile" : "desktop"}-splash.png`);
+
+  await page.goto("/characters/elio/private-zoom");
+  await expect(page.getByRole("button", { name: "Save CozSweet" })).toBeVisible();
+  await expect(page.getByRole("button", { name: "Menu" })).toBeVisible();
+  await savePreview(
+    page,
+    `${mobile ? "mobile" : "desktop"}-private-zoom.png`,
+  );
+
+  await page.getByRole("button", { name: "Menu" }).click();
+  await expect(page.getByRole("heading", { name: "Menu" })).toBeVisible();
+  await expect(page.getByRole("button", { name: "Save CozSweet" })).toBeVisible();
+  await expect(page.getByRole("button", { name: "Menu" })).toHaveAttribute(
+    "aria-current",
+    "page",
+  );
+  await savePreview(page, `${mobile ? "mobile" : "desktop"}-menu.png`);
+
+  if (mobile) {
+    await page.evaluate(() => {
+      localStorage.setItem("cozsweet:favorite_entry", "1");
+    });
+    await page.goto(defaultCharacterChatPath);
+    await expect(page.getByRole("button", { name: "Download" })).toBeVisible();
+    await savePreview(page, "mobile-android-external-chat-download.png");
+
+    await page.addInitScript(() => {
+      Object.defineProperty(navigator, "userAgent", {
+        configurable: true,
+        value:
+          "Mozilla/5.0 (iPhone; CPU iPhone OS 18_5 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.5 Mobile/15E148 Safari/604.1",
+      });
+    });
+    await page.goto(defaultCharacterChatPath);
+    await expect(page.getByRole("button", { name: "Saved" })).toBeVisible();
+    await savePreview(page, "mobile-ios-external-chat-saved.png");
+  }
+
+  expect(browserErrors.filter(isFeatureRuntimeError)).toEqual([]);
+});
+
+async function registerFavoriteMenuMocks(page: Page): Promise<void> {
+  await mockCoreApis(page);
+  await page.route("**/api/payment/plans**", async (route) => {
+    await route.fulfill({
+      json: apiEnvelope({
+        ...paymentPlansResponse,
+        isFirstRecharge: true,
+      }),
+    });
+  });
+  await page.route("**/api/private-zoom/albums**", async (route) => {
+    await route.fulfill({
+      json: apiEnvelope({ items: [], creditBalance: 80 }),
+    });
+  });
+  await page.context().route("**/api/**", async (route) => {
+    const pathname = new URL(route.request().url()).pathname;
+    if (pathname === "/api/auth/session") {
+      await route.fulfill({
+        json: {
+          expires: "2099-12-31T23:59:59.000Z",
+          user: { email: null, image: null, name: null },
+        },
+      });
+      return;
+    }
+    if (pathname === "/api/characters") {
+      await route.fulfill({ json: apiEnvelope(chatCharactersResponse) });
+      return;
+    }
+    if (pathname === "/api/user/profile") {
+      await route.fulfill({ json: apiEnvelope(e2eEmailUser) });
+      return;
+    }
+    if (pathname === "/api/user/entitlements") {
+      await route.fulfill({ json: apiEnvelope(userEntitlementsResponse) });
+      return;
+    }
+    if (pathname === "/api/chat/history") {
+      await route.fulfill({ json: apiEnvelope(emptyChatHistoryResponse) });
+      return;
+    }
+    if (pathname === "/api/chat/previews") {
+      await route.fulfill({ json: apiEnvelope(emptyChatPreviewsResponse) });
+      return;
+    }
+    if (pathname === "/api/payment/plans") {
+      await route.fulfill({
+        json: apiEnvelope({
+          ...paymentPlansResponse,
+          isFirstRecharge: true,
+        }),
+      });
+      return;
+    }
+    if (pathname === "/api/payment/vip-status") {
+      await route.fulfill({
+        json: apiEnvelope({ isVip: false, expiresAt: null }),
+      });
+      return;
+    }
+    if (pathname === "/api/private-zoom/albums") {
+      await route.fulfill({
+        json: apiEnvelope({ items: [], creditBalance: 80 }),
+      });
+      return;
+    }
+    await route.fallback();
+  });
+}
+
+function collectBrowserErrors(page: Page): string[] {
+  const errors: string[] = [];
+  page.on("pageerror", (error) => errors.push(error.message));
+  page.on("console", (message) => {
+    if (message.type() === "error") errors.push(message.text());
+  });
+  return errors;
+}
+
+function isFeatureRuntimeError(message: string): boolean {
+  const isKnownLocalPreviewDependencyError =
+    message.includes("[ApiLoggingInterceptor]") ||
+    message.includes("[next-auth][error][CLIENT_FETCH_ERROR]") ||
+    message.includes("[Result] Result.wrap caught exception");
+  return !isKnownLocalPreviewDependencyError;
+}
+
+async function savePreview(page: Page, fileName: string): Promise<void> {
+  if (process.env.FRONTEND_PREVIEW_SCREENSHOTS !== "1") return;
+  await page.screenshot({
+    path: path.join(previewDirectory, fileName),
+    animations: "disabled",
+  });
+}

src/app/_components/core/__tests__/tailwind-components.test.tsx

@@ -82,6 +82,7 @@ describe("core Tailwind components", () => {
         privateZoneLabel="Maya Private Zone"
         onChatClick={() => undefined}
         onPrivateZoneClick={() => undefined}
+        onMenuClick={() => undefined}
       />,
     );
     const privateZoneHtml = renderToStaticMarkup(
@@ -91,6 +92,7 @@ describe("core Tailwind components", () => {
         privateZoneLabel="Maya Private Zone"
         onChatClick={() => undefined}
         onPrivateZoneClick={() => undefined}
+        onMenuClick={() => undefined}
       />,
     );
 
@@ -107,5 +109,7 @@ describe("core Tailwind components", () => {
     expect(privateZoneHtml).toContain(
       'data-analytics-key="navigation.private_zone"',
     );
+    expect(chatHtml).toContain('data-analytics-key="navigation.menu"');
+    expect(chatHtml).toContain("<span>Menu</span>");
   });
 });

src/app/_components/core/app-bottom-nav.module.css

@@ -4,7 +4,7 @@
   left: 50%;
   z-index: 30;
   display: grid;
-  grid-template-columns: 1fr 1fr;
+  grid-template-columns: repeat(3, minmax(0, 1fr));
   box-sizing: border-box;
   width: min(100vw, var(--app-max-width, 540px));
   min-height: calc(

src/app/_components/core/app-bottom-nav.tsx

@@ -1,10 +1,10 @@
 "use client";
 
-import { Camera, MessageCircle } from "lucide-react";
+import { Camera, Menu as MenuIcon, MessageCircle } from "lucide-react";
 
 import styles from "./app-bottom-nav.module.css";
 
-export type AppBottomNavItem = "chat" | "privateZone";
+export type AppBottomNavItem = "chat" | "privateZone" | "menu";
 export type AppBottomNavVariant = "warm" | "dark";
 
 export interface AppBottomNavProps {
@@ -13,6 +13,7 @@ export interface AppBottomNavProps {
   privateZoneLabel: string;
   onChatClick: () => void;
   onPrivateZoneClick: () => void;
+  onMenuClick: () => void;
 }
 
 export function AppBottomNav({
@@ -21,6 +22,7 @@ export function AppBottomNav({
   privateZoneLabel,
   onChatClick,
   onPrivateZoneClick,
+  onMenuClick,
 }: AppBottomNavProps) {
   return (
     <nav className={getRootClass(variant)} aria-label="Primary navigation">
@@ -46,6 +48,17 @@ export function AppBottomNav({
         <Camera size={20} aria-hidden="true" />
         <span>{privateZoneLabel}</span>
       </button>
+      <button
+        type="button"
+        data-analytics-key="navigation.menu"
+        data-analytics-label="Menu navigation"
+        className={getButtonClass(activeItem === "menu")}
+        aria-current={activeItem === "menu" ? "page" : undefined}
+        onClick={onMenuClick}
+      >
+        <MenuIcon size={20} aria-hidden="true" />
+        <span>Menu</span>
+      </button>
     </nav>
   );
 }

src/app/_components/core/favorite-entry-button.module.css

@@ -0,0 +1,96 @@
+.wrap {
+  position: relative;
+  display: inline-flex;
+  flex: 0 0 auto;
+  justify-content: flex-end;
+}
+
+.button {
+  display: inline-flex;
+  min-width: var(--responsive-icon-button-size, 42px);
+  height: var(--responsive-icon-button-size, 42px);
+  align-items: center;
+  justify-content: center;
+  gap: 6px;
+  box-sizing: border-box;
+  padding: 0 11px;
+  border: 1px solid var(--favorite-border);
+  border-radius: 999px;
+  background: var(--favorite-background);
+  color: var(--favorite-color);
+  cursor: pointer;
+  font: inherit;
+  font-size: 12px;
+  font-weight: 850;
+  line-height: 1;
+  box-shadow: var(--favorite-shadow);
+  backdrop-filter: blur(16px);
+  transition: background 160ms ease, transform 160ms ease,
+    box-shadow 160ms ease;
+  -webkit-tap-highlight-color: transparent;
+}
+
+.dark {
+  --favorite-background: rgba(18, 15, 24, 0.72);
+  --favorite-border: rgba(255, 255, 255, 0.22);
+  --favorite-color: #ffffff;
+  --favorite-shadow: 0 10px 26px rgba(0, 0, 0, 0.24);
+}
+
+.light {
+  --favorite-background: rgba(255, 255, 255, 0.88);
+  --favorite-border: rgba(43, 27, 34, 0.1);
+  --favorite-color: #34272c;
+  --favorite-shadow: 0 10px 24px rgba(74, 48, 58, 0.1);
+}
+
+.favorite {
+  width: var(--responsive-icon-button-size, 42px);
+  padding: 0;
+}
+
+.download {
+  color: #ffffff;
+  background: linear-gradient(135deg, #ff76ab, #f84d96);
+  border-color: rgba(255, 255, 255, 0.42);
+  box-shadow: 0 10px 25px rgba(248, 77, 150, 0.3);
+}
+
+.saved {
+  color: #f84d96;
+}
+
+.button:hover {
+  transform: translateY(-1px);
+  box-shadow: 0 13px 30px rgba(0, 0, 0, 0.2);
+}
+
+.button:active {
+  transform: translateY(1px) scale(0.98);
+}
+
+.button:focus-visible {
+  outline: 2px solid #ffffff;
+  outline-offset: 3px;
+}
+
+.light:focus-visible {
+  outline-color: #f84d96;
+}
+
+.hint {
+  position: absolute;
+  top: calc(100% + 8px);
+  right: 0;
+  z-index: 45;
+  width: max-content;
+  max-width: min(72vw, 250px);
+  padding: 8px 10px;
+  border-radius: 10px;
+  background: rgba(22, 18, 25, 0.94);
+  color: #ffffff;
+  font-size: 11px;
+  font-weight: 700;
+  line-height: 1.3;
+  box-shadow: 0 10px 26px rgba(0, 0, 0, 0.24);
+}

src/app/_components/core/favorite-entry-button.tsx

@@ -0,0 +1,107 @@
+"use client";
+
+import { useEffect, useState } from "react";
+import { Download, Star } from "lucide-react";
+
+import { openChatInExternalBrowser } from "@/lib/chat/chat_external_browser";
+import {
+  hasPersistedFavoriteEntryIntent,
+  resolveFavoriteEntryMode,
+  type FavoriteEntryMode,
+} from "@/lib/navigation/favorite_entry";
+import { BrowserDetector } from "@/utils/browser-detect";
+import { PlatformDetector } from "@/utils/platform-detect";
+import { pwaUtil } from "@/utils/pwa";
+
+import styles from "./favorite-entry-button.module.css";
+
+export interface FavoriteEntryButtonProps {
+  characterSlug: string;
+  tone?: "dark" | "light";
+}
+
+export function FavoriteEntryButton({
+  characterSlug,
+  tone = "dark",
+}: FavoriteEntryButtonProps) {
+  const [mode, setMode] = useState<FavoriteEntryMode>("favorite");
+  const [installHint, setInstallHint] = useState(false);
+
+  useEffect(() => {
+    const updateMode = () => {
+      setMode(
+        resolveFavoriteEntryMode({
+          hasFavoriteIntent: hasPersistedFavoriteEntryIntent(),
+          isAndroid: PlatformDetector.isAndroid(),
+          isIOS: PlatformDetector.isIOS(),
+          isInAppBrowser: BrowserDetector.isInAppBrowser(),
+          isInstalled: pwaUtil.isInstalled(),
+        }),
+      );
+    };
+
+    pwaUtil.prepareInstallPrompt();
+    updateMode();
+    const unsubscribe = pwaUtil.subscribe(updateMode);
+    return unsubscribe;
+  }, []);
+
+  const handleClick = async (): Promise<void> => {
+    if (mode === "favorite") {
+      await openChatInExternalBrowser({ characterSlug });
+      return;
+    }
+
+    if (mode === "download") {
+      pwaUtil.prepareInstallPrompt();
+      const result = await pwaUtil.install();
+      if (result === "accepted" || pwaUtil.isInstalled()) {
+        setMode("saved");
+        setInstallHint(false);
+        return;
+      }
+      if (result === "unavailable") setInstallHint(true);
+    }
+  };
+
+  const label = getFavoriteEntryLabel(mode);
+
+  return (
+    <div className={styles.wrap}>
+      <button
+        type="button"
+        data-analytics-key={`favorite.${mode}`}
+        data-analytics-label={label}
+        className={[styles.button, styles[tone], styles[mode]]
+          .filter(Boolean)
+          .join(" ")}
+        aria-label={label}
+        aria-pressed={mode === "saved"}
+        onClick={() => void handleClick()}
+      >
+        {mode === "download" ? (
+          <Download size={16} strokeWidth={2.4} aria-hidden="true" />
+        ) : (
+          <Star
+            size={21}
+            strokeWidth={2.3}
+            fill={mode === "saved" ? "currentColor" : "none"}
+            aria-hidden="true"
+          />
+        )}
+        {mode === "favorite" ? null : <span>{label}</span>}
+      </button>
+      {installHint ? (
+        <span className={styles.hint} role="status">
+          Chrome menu → Add to Home screen
+        </span>
+      ) : null}
+    </div>
+  );
+}
+
+function getFavoriteEntryLabel(mode: FavoriteEntryMode): string {
+  if (mode === "download") return "Download";
+  if (mode === "saved") return "Saved";
+  return "Save CozSweet";
+}

src/app/_components/core/index.ts

@@ -5,6 +5,7 @@
 export * from "./app-bottom-nav";
 export * from "./bottom-sheet";
 export * from "./checkbox";
+export * from "./favorite-entry-button";
 export * from "./loading-indicator";
 export * from "./mobile-shell";
 export * from "./page-loading-fallback";

src/app/chat/chat-screen.tsx

@@ -38,7 +38,6 @@ import {
 } from "./chat-image-overlay-url";
 import {
   deriveIsGuest,
-  shouldStartExternalBrowserPrompt,
 } from "./chat-screen.helpers";
 import { useFirstRechargeOfferBanner } from "./hooks/use-first-recharge-offer-banner";
 import { useChatUnlockCoordinator } from "./hooks/use-chat-unlock-coordinator";
@@ -118,12 +117,6 @@ export function ChatScreen() {
   });
   const shouldShowPwaInstall =
     state.historyLoaded && state.historyMessages.length >= 10;
-  const shouldShowBrowserHint = shouldStartExternalBrowserPrompt({
-    hasInitialized: authState.hasInitialized,
-    isLoading: authState.isLoading,
-    loginStatus: authState.loginStatus,
-  });
-
   useChatGuestLogin({
     dispatch: authDispatch,
     hasInitialized: authState.hasInitialized,
@@ -276,13 +269,13 @@ export function ChatScreen() {
         <div className="relative z-1 flex min-h-0 flex-[1_1_auto] flex-col">
           <ChatHeader
             isGuest={isGuest}
-            showBrowserHint={shouldShowBrowserHint}
             offerBanner={
               <FirstRechargeOfferBanner
                 visible={firstRechargeOfferBanner.visible}
                 discountPercent={firstRechargeOfferBanner.discountPercent}
                 onClick={firstRechargeOfferBanner.claim}
                 onClose={firstRechargeOfferBanner.close}
+                variant="compact"
               />
             }
           />

src/app/chat/components/__tests__/tailwind-components.test.tsx

@@ -242,12 +242,6 @@ describe("chat Tailwind components", () => {
     const memberHtml = renderWithCharacter(
       <ChatHeader isGuest={false} offerBanner={<div>Offer</div>} />,
     );
-    const memberWithHintHtml = renderWithCharacter(
-      <ChatHeader isGuest={false} showBrowserHint />,
-    );
-    const guestWithHintHtml = renderWithCharacter(
-      <ChatHeader isGuest={true} showBrowserHint />,
-    );
 
     expect(guestHtml).toContain('aria-label="Sign up to unlock more features"');
     expect(guestHtml).toContain("bg-accent");
@@ -257,50 +251,33 @@ describe("chat Tailwind components", () => {
     expect(guestHtml).toContain('data-analytics-key="chat.back_to_home"');
     expect(guestHtml).toContain("px-(--chat-inline-padding,16px)");
     expect(guestHtml).not.toContain('aria-label="Profile"');
+    expect(guestHtml).toContain('aria-label="Save CozSweet"');
     expect(memberHtml).toContain("Offer");
     expect(memberHtml).toContain('href="/characters/elio/splash"');
     expect(memberHtml).toContain('aria-label="Back to home"');
-    expect(memberHtml).toContain('aria-label="Profile"');
+    expect(memberHtml).toContain('aria-label="Save CozSweet"');
-    expect(memberHtml).toContain('data-analytics-key="chat.open_profile"');
+    expect(memberHtml).toContain('data-analytics-key="favorite.favorite"');
     expect(memberHtml).toContain('data-analytics-key="chat.back_to_home"');
     expect(memberHtml).toContain("px-(--chat-inline-padding,16px)");
     expect(memberHtml).not.toContain("px-(--spacing-md,12px)");
-    expect(memberHtml).toContain("bg-[rgba(13,11,20,0.7)]");
+    expect(memberHtml).toContain(
-    expect(memberHtml).toContain("size-(--responsive-icon-button-size,42px)");
-    expect(memberHtml).toContain("lucide-user-round");
-    expect(memberWithHintHtml).toContain(
-      'data-analytics-key="chat.external_browser_hint"',
-    );
-    expect(memberWithHintHtml).toContain(
       "grid-cols-[auto_minmax(0,1fr)_auto]",
     );
-    expect(memberWithHintHtml.indexOf('aria-label="Back to home"')).toBeLessThan(
+    expect(memberHtml).not.toContain(
-      memberWithHintHtml.indexOf(
-        'data-analytics-key="chat.external_browser_hint"',
-      ),
-    );
-    expect(
-      memberWithHintHtml.indexOf(
-        'data-analytics-key="chat.external_browser_hint"',
-      ),
-    ).toBeLessThan(memberWithHintHtml.indexOf('aria-label="Profile"'));
-    expect(guestWithHintHtml).not.toContain(
       'data-analytics-key="chat.external_browser_hint"',
     );
   });
 
-  it("renders the user avatar in the ChatHeader Profile action", () => {
+  it("replaces the ChatHeader Profile avatar with the favorite action", () => {
     userMocks.avatarUrl = "/images/avatar/profile-user.png";
 
     const html = renderWithCharacter(<ChatHeader isGuest={false} />);
 
-    expect(html).toContain("%2Fimages%2Favatar%2Fprofile-user.png");
+    expect(html).not.toContain("%2Fimages%2Favatar%2Fprofile-user.png");
-    expect(html).toContain('aria-label="Profile"');
+    expect(html).not.toContain('aria-label="Profile"');
-    expect(html).toContain('data-analytics-key="chat.open_profile"');
+    expect(html).not.toContain('data-analytics-key="chat.open_profile"');
-    expect(html).toContain(
+    expect(html).toContain('aria-label="Save CozSweet"');
-      "var(--responsive-icon-button-size, 42px)",
+    expect(html).toContain("lucide-star");
-    );
-    expect(html).not.toContain("lucide-user-round");
   });
 
   it("links guest chat back to the active character splash", () => {
@@ -315,6 +292,7 @@ describe("chat Tailwind components", () => {
 
     expect(html).toContain('href="/characters/maya/splash"');
     expect(html).not.toContain('aria-label="Profile"');
+    expect(html).toContain('aria-label="Save CozSweet"');
     expect(html).not.toContain(
       'data-analytics-key="chat.external_browser_hint"',
     );

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

@@ -2,37 +2,31 @@
 /**
  * ChatHeader 顶部栏
  *
- * Profile 优先展示用户头像；头像缺失时回退到 lucide-react <UserRound />。
+ * 顶部保持返回、首充优惠、收藏入口三段结构。
  */
 import type { ReactNode } from "react";
-import { Lock, UserRound } from "lucide-react";
+import { Lock } from "lucide-react";
 
-import { BackButton, UserMessageAvatar } from "@/app/_components";
+import { BackButton } from "@/app/_components";
-import { useActiveCharacterRoutes } from "@/providers/character-provider";
+import { FavoriteEntryButton } from "@/app/_components/core";
-import { buildGlobalPageUrl } from "@/router/global-route-context";
+import {
-import { ROUTES } from "@/router/routes";
+  useActiveCharacter,
+  useActiveCharacterRoutes,
+} from "@/providers/character-provider";
 import { useAppNavigator } from "@/router/use-app-navigator";
-import { useUserSelector } from "@/stores/user/user-context";
-
-import { BrowserHintOverlay } from "./browser-hint-overlay";
 
 export interface ChatHeaderProps {
   isGuest: boolean;
   offerBanner?: ReactNode;
-  showBrowserHint?: boolean;
 }
 
 export function ChatHeader({
   isGuest,
   offerBanner,
-  showBrowserHint = false,
 }: ChatHeaderProps) {
   const navigator = useAppNavigator();
+  const character = useActiveCharacter();
   const characterRoutes = useActiveCharacterRoutes();
-  const avatarUrl = useUserSelector((state) => state.context.avatarUrl);
-  const handleOpenProfile = () => {
-    navigator.push(buildGlobalPageUrl(ROUTES.profile, characterRoutes.chat));
-  };
 
   return (
     <header className="flex shrink-0 flex-col items-stretch bg-transparent p-0">
@@ -52,17 +46,9 @@ export function ChatHeader({
           />
           <span>Sign up to unlock more features</span>
         </button>
-      ) : (
+      ) : null}
-        offerBanner
-      )}
 
-      <div
+      <div className="grid grid-cols-[auto_minmax(0,1fr)_auto] items-center gap-(--spacing-sm,8px) px-(--chat-inline-padding,16px) py-(--spacing-sm,8px)">
-        className={
-          isGuest
-            ? "flex items-center px-(--chat-inline-padding,16px) py-(--spacing-sm,8px)"
-            : "grid grid-cols-[auto_minmax(0,1fr)_auto] items-center gap-(--spacing-sm,8px) px-(--chat-inline-padding,16px) py-(--spacing-sm,8px)"
-        }
-      >
         <BackButton
           href={characterRoutes.splash}
           variant="dark"
@@ -70,34 +56,12 @@ export function ChatHeader({
           analyticsKey="chat.back_to_home"
         />
 
-        {!isGuest ? (
+        <div className="flex min-w-0 justify-center">{offerBanner}</div>
-          <>
-            <div className="flex min-w-0 justify-center">
-              {showBrowserHint ? <BrowserHintOverlay /> : null}
-            </div>
 
-            {avatarUrl ? (
+        <FavoriteEntryButton
-              <UserMessageAvatar
+          characterSlug={character.slug}
-                avatarUrl={avatarUrl}
+          tone="dark"
-                size="var(--responsive-icon-button-size, 42px)"
-                actionLabel="Profile"
-                analyticsKey="chat.open_profile"
-                onClick={handleOpenProfile}
         />
-            ) : (
-              <button
-                type="button"
-                data-analytics-key="chat.open_profile"
-                data-analytics-label="Open profile"
-                className="flex size-(--responsive-icon-button-size,42px) cursor-pointer items-center justify-center rounded-full border border-[rgba(255,255,255,0.12)] bg-[rgba(13,11,20,0.7)] text-(--color-text-primary,#fff) shadow-[0_10px_24px_rgba(0,0,0,0.2)] backdrop-blur-md transition-[background,transform] duration-150 hover:bg-[rgba(28,24,39,0.82)] active:scale-96 focus-visible:outline-2 focus-visible:outline-offset-3 focus-visible:outline-[#f657a0]"
-                onClick={handleOpenProfile}
-                aria-label="Profile"
-              >
-                <UserRound size={24} aria-hidden="true" />
-              </button>
-            )}
-          </>
-        ) : null}
       </div>
     </header>
   );

src/app/chat/components/first-recharge-offer-banner.module.css

@@ -121,8 +121,73 @@
   cursor: pointer;
 }
 
+.compactButton {
+  display: grid;
+  min-width: 0;
+  max-width: 224px;
+  min-height: 44px;
+  grid-template-columns: auto minmax(0, 1fr) auto;
+  align-items: center;
+  gap: 7px;
+  padding: 5px 8px;
+  overflow: hidden;
+  border: 1px solid rgba(255, 255, 255, 0.42);
+  border-radius: 16px;
+  background:
+    radial-gradient(circle at 15% 0%, rgba(255, 255, 255, 0.68), transparent 38%),
+    linear-gradient(135deg, #fff0b8 0%, #ffd0df 50%, #ff6cab 100%);
+  color: #2c111d;
+  cursor: pointer;
+  font: inherit;
+  text-align: left;
+  box-shadow: 0 9px 24px rgba(114, 21, 63, 0.2);
+  animation: firstRechargeBannerIn 260ms ease-out both;
+}
+
+.compactIcon {
+  display: inline-flex;
+  width: 28px;
+  height: 28px;
+  align-items: center;
+  justify-content: center;
+  border-radius: 10px;
+  background: rgba(255, 255, 255, 0.55);
+  color: #f90073;
+}
+
+.compactCopy {
+  display: flex;
+  min-width: 0;
+  flex-direction: column;
+  gap: 2px;
+  font-size: 10px;
+  font-weight: 800;
+  line-height: 1.05;
+  text-transform: uppercase;
+}
+
+.compactCopy span,
+.compactCopy strong {
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+.compactCopy span {
+  color: rgba(44, 17, 29, 0.68);
+  letter-spacing: 0.03em;
+}
+
+.compactCopy strong {
+  color: #ec006d;
+  font-size: 15px;
+  font-weight: 950;
+  letter-spacing: -0.02em;
+}
+
 .contentButton:focus-visible,
-.closeButton:focus-visible {
+.closeButton:focus-visible,
+.compactButton:focus-visible {
   outline: 2px solid rgba(255, 255, 255, 0.94);
   outline-offset: -3px;
 }
@@ -144,4 +209,14 @@
     flex-direction: column;
     gap: 2px;
   }
+
+  .compactButton {
+    gap: 5px;
+    padding-inline: 6px;
+  }
+
+  .compactIcon {
+    width: 26px;
+    height: 26px;
+  }
 }

src/app/chat/components/first-recharge-offer-banner.tsx

@@ -9,6 +9,7 @@ export interface FirstRechargeOfferBannerProps {
   discountPercent: number;
   onClick: () => void;
   onClose: () => void;
+  variant?: "banner" | "compact";
 }
 
 export function FirstRechargeOfferBanner({
@@ -16,9 +17,32 @@ export function FirstRechargeOfferBanner({
   discountPercent,
   onClick,
   onClose,
+  variant = "banner",
 }: FirstRechargeOfferBannerProps) {
   if (!visible) return null;
 
+  if (variant === "compact") {
+    return (
+      <button
+        type="button"
+        data-analytics-key="chat.first_recharge_offer"
+        data-analytics-label="Open first recharge offer"
+        className={styles.compactButton}
+        aria-label={`First recharge offer, ${discountPercent}% off`}
+        onClick={onClick}
+      >
+        <span className={styles.compactIcon} aria-hidden="true">
+          <Sparkles size={14} strokeWidth={2.4} />
+        </span>
+        <span className={styles.compactCopy}>
+          <span>First recharge</span>
+          <strong>{discountPercent}% OFF</strong>
+        </span>
+        <ChevronRight size={14} strokeWidth={2.4} aria-hidden="true" />
+      </button>
+    );
+  }
+
   return (
     <section className={styles.banner} aria-label="First recharge offer">
       <button

src/app/external-entry/external-entry-persist.tsx

@@ -21,6 +21,10 @@ import {
 } from "@/data/constants/character";
 import { Logger } from "@/utils/logger";
 import { useAuthDispatch, useAuthState } from "@/stores/auth/auth-context";
+import {
+  isFavoriteEntryRequest,
+  persistFavoriteEntryIntent,
+} from "@/lib/navigation/favorite_entry";
 
 const log = new Logger("ExternalEntryPersist");
 
@@ -33,6 +37,7 @@ interface ExternalEntryPersistProps {
   character: string | null;
   mode: string | null;
   promotionType: string | null;
+  favorite: string | null;
 }
 
 export default function ExternalEntryPersist({
@@ -44,6 +49,7 @@ export default function ExternalEntryPersist({
   character,
   mode,
   promotionType,
+  favorite,
 }: ExternalEntryPersistProps) {
   const router = useRouter();
   const authState = useAuthState();
@@ -75,6 +81,9 @@ export default function ExternalEntryPersist({
           ? savePendingChatPromotion(resolvedPromotionType, characterId)
           : clearPendingChatPromotion(),
       ]);
+      if (isFavoriteEntryRequest(favorite)) {
+        persistFavoriteEntryIntent();
+      }
       for (const result of results) {
         if (result.status === "rejected") {
           log.warn(
@@ -96,6 +105,7 @@ export default function ExternalEntryPersist({
     characterId,
     destination,
     deviceId,
+    favorite,
     mode,
     promotionType,
     psid,

src/app/external-entry/page.tsx

@@ -34,6 +34,7 @@ export default async function ExternalEntryPage({
       character={pickParam(params.character)}
       mode={pickParam(params.mode)}
       promotionType={pickParam(params.promotion_type)}
+      favorite={pickParam(params.favorite)}
     />
   );
 }

src/app/private-zone/private-zone-screen.module.css

@@ -26,6 +26,13 @@
   filter: blur(8px);
 }
 
+.favoriteAction {
+  position: absolute;
+  top: calc(var(--app-safe-top, 0px) + 14px);
+  right: calc(var(--app-safe-right, 0px) + 14px);
+  z-index: 5;
+}
+
 .backgroundGlowOne {
   top: 118px;
   right: -82px;

src/app/private-zone/private-zone-screen.tsx

@@ -5,7 +5,13 @@ import Image from "next/image";
 import { useRouter, useSearchParams } from "next/navigation";
 
 import { CharacterAvatar } from "@/app/_components";
-import { AppBottomNav, MobileShell } from "@/app/_components/core";
+import {
+  AppBottomNav,
+  FavoriteEntryButton,
+  MobileShell,
+} from "@/app/_components/core";
+import { buildGlobalPageUrl } from "@/router/global-route-context";
+import { ROUTES } from "@/router/routes";
 import { useAppNavigator } from "@/router/use-app-navigator";
 import {
   useActiveCharacter,
@@ -183,6 +189,12 @@ export function PrivateZoneScreen() {
       <main className={styles.shell}>
         <div className={styles.backgroundGlowOne} />
         <div className={styles.backgroundGlowTwo} />
+        <div className={styles.favoriteAction}>
+          <FavoriteEntryButton
+            characterSlug={character.slug}
+            tone="dark"
+          />
+        </div>
 
         <section className={styles.hero} aria-label={title}>
           <div className={styles.heroCover}>
@@ -275,6 +287,12 @@ export function PrivateZoneScreen() {
             navigator.push(characterRoutes.splash, { scroll: false })
           }
           onPrivateZoneClick={() => undefined}
+          onMenuClick={() =>
+            navigator.push(
+              buildGlobalPageUrl(ROUTES.profile, characterRoutes.chat),
+              { scroll: false },
+            )
+          }
         />
 
         {pendingAlbum ? (

src/app/profile/components/profile-screen.module.css

@@ -3,13 +3,16 @@
   display: flex;
   flex-direction: column;
   gap: var(--page-section-gap, 14px);
-  overflow: hidden;
+  overflow: hidden auto;
   min-height: var(--app-viewport-height, 100dvh);
   box-sizing: border-box;
   padding:
     var(--app-safe-top, 0px)
     calc(var(--page-padding-x, 28px) + var(--app-safe-right, 0px))
-    calc(var(--page-padding-y, 20px) + var(--app-safe-bottom, 0px))
+    calc(
+      var(--page-padding-y, 20px) + var(--app-safe-bottom, 0px) +
+        var(--app-bottom-nav-height, 64px)
+    )
     calc(var(--page-padding-x, 28px) + var(--app-safe-left, 0px));
   background:
     radial-gradient(circle at 18% 6%, rgba(255, 206, 160, 0.22), transparent 28%),
@@ -52,9 +55,23 @@
 }
 
 .topBar {
+  display: grid;
+  grid-template-columns: auto minmax(0, 1fr) auto;
+  align-items: center;
+  gap: 10px;
   margin: var(--page-padding-y, 18px) 0 -2px;
 }
 
+.pageTitle {
+  min-width: 0;
+  margin: 0;
+  color: #251a1f;
+  font-size: clamp(22px, 5.185vw, 28px);
+  font-weight: 900;
+  letter-spacing: -0.03em;
+  text-align: center;
+}
+
 .userSlot {
   padding: var(--responsive-card-padding, 18px);
   border: 1px solid rgba(25, 19, 22, 0.06);

src/app/profile/profile-screen.tsx

@@ -4,7 +4,12 @@ import { Download, LogOut, MessageCircleQuestion } from "lucide-react";
 import { signOut } from "next-auth/react";
 
 import { BackButton } from "@/app/_components";
-import { MobileShell } from "@/app/_components/core";
+import {
+  AppBottomNav,
+  FavoriteEntryButton,
+  MobileShell,
+} from "@/app/_components/core";
+import { getCharacterBySlug } from "@/data/constants/character";
 import {
   resolveGlobalRouteContext,
   type GlobalReturnToValue,
@@ -13,6 +18,7 @@ import { setPendingLogoutNavigation } from "@/router/logout-navigation";
 import { useGlobalAppNavigator } from "@/router/use-global-app-navigator";
 import { useAuthDispatch, useAuthState } from "@/stores/auth/auth-context";
 import { useUserDispatch, useUserState } from "@/stores/user/user-context";
+import { getCharacterRoutes } from "@/router/routes";
 
 import { ProfileWalletCard, UserHeader } from "./components";
 import { getProfileViewModel } from "./profile-view-model";
@@ -28,6 +34,8 @@ export interface ProfileScreenProps {
 export function ProfileScreen({ returnTo }: ProfileScreenProps) {
   const navigator = useGlobalAppNavigator();
   const navigation = resolveGlobalRouteContext(returnTo);
+  const character = getCharacterBySlug(navigation.characterSlug);
+  const characterRoutes = getCharacterRoutes(navigation.characterSlug);
   const user = useUserState();
   const userDispatch = useUserDispatch();
   const auth = useAuthState();
@@ -61,6 +69,11 @@ export function ProfileScreen({ returnTo }: ProfileScreenProps) {
             variant="soft"
             analyticsKey="profile.back_to_chat"
           />
+          <h1 className={styles.pageTitle}>Menu</h1>
+          <FavoriteEntryButton
+            characterSlug={navigation.characterSlug}
+            tone="light"
+          />
         </div>
 
         <section className={`${styles.userSlot} ${styles.revealOne}`}>
@@ -175,6 +188,20 @@ export function ProfileScreen({ returnTo }: ProfileScreenProps) {
             </div>
           </section>
         ) : null}
+
+        <AppBottomNav
+          activeItem="menu"
+          privateZoomLabel={
+            character?.copy.privateZoomTitle ?? "Private Zoom"
+          }
+          onChatClick={() =>
+            navigator.push(navigation.splashUrl, { scroll: false })
+          }
+          onPrivateZoomClick={() =>
+            navigator.push(characterRoutes.privateZoom, { scroll: false })
+          }
+          onMenuClick={() => undefined}
+        />
       </div>
     </MobileShell>
   );

src/app/splash/components/splash-screen.module.css

@@ -22,6 +22,13 @@
   pointer-events: none;
 }
 
+.favoriteAction {
+  position: absolute;
+  top: calc(var(--page-padding-y, 20px) + var(--app-safe-top, 0px));
+  right: calc(var(--page-padding-x, 20px) + var(--app-safe-right, 0px));
+  z-index: 4;
+}
+
 .content {
   position: relative;
   z-index: 2;

src/app/splash/splash-screen.tsx

@@ -2,7 +2,13 @@
 
 import { useEffect } from "react";
 
-import { AppBottomNav, MobileShell } from "@/app/_components/core";
+import {
+  AppBottomNav,
+  FavoriteEntryButton,
+  MobileShell,
+} from "@/app/_components/core";
+import { buildGlobalPageUrl } from "@/router/global-route-context";
+import { ROUTES } from "@/router/routes";
 import { useAppNavigator } from "@/router/use-app-navigator";
 import {
   useActiveCharacter,
@@ -45,6 +51,13 @@ export function SplashScreen() {
     navigator.push(characterRoutes.splash, { scroll: false });
   };
 
+  const handleOpenMenu = () => {
+    navigator.push(
+      buildGlobalPageUrl(ROUTES.profile, characterRoutes.chat),
+      { scroll: false },
+    );
+  };
+
   useEffect(() => {
     pwaUtil.prepareInstallPrompt();
   }, []);
@@ -55,6 +68,12 @@ export function SplashScreen() {
         <SplashBackground src={character.assets.cover} />
         {/* 渐变叠加层：accent → transparent (bottom-left → center-right) */}
         <div className={styles.gradientOverlay} aria-hidden="true" />
+        <div className={styles.favoriteAction}>
+          <FavoriteEntryButton
+            characterSlug={character.slug}
+            tone="dark"
+          />
+        </div>
         <div className={styles.content}>
           <SplashLogo />
           <div className={styles.spacer} />
@@ -80,6 +99,7 @@ export function SplashScreen() {
           privateZoneLabel={character.copy.privateZoneTitle}
           onChatClick={handleOpenSplash}
           onPrivateZoneClick={handleOpenPrivateZone}
+          onMenuClick={handleOpenMenu}
         />
       </div>
     </MobileShell>

src/lib/chat/chat_external_browser.ts

@@ -5,7 +5,13 @@ import { UserStorage } from "@/data/storage/user/user_storage";
 import { ROUTES } from "@/router/routes";
 import { UrlLauncherUtil } from "@/utils/url-launcher-util";
 
-export async function openChatInExternalBrowser(): Promise<void> {
+export interface OpenChatInExternalBrowserInput {
+  characterSlug?: string;
+}
+
+export async function openChatInExternalBrowser({
+  characterSlug,
+}: OpenChatInExternalBrowserInput = {}): Promise<void> {
   const authStorage = AuthStorage.getInstance();
   const userStorage = UserStorage.getInstance();
   const [deviceIdR, asidR, psidR, avatarUrlR] =
@@ -21,18 +27,15 @@ export async function openChatInExternalBrowser(): Promise<void> {
   const psid = psidR.success ? psidR.data : null;
   const avatarUrl = avatarUrlR.success ? avatarUrlR.data : null;
 
-  if (deviceId && asid) {
   UrlLauncherUtil.openUrlWithExternalBrowser(ROUTES.externalEntry, {
     queryParams: {
       target: "chat",
-        device_id: deviceId,
+      favorite: "1",
-        asid,
+      ...(characterSlug ? { character: characterSlug } : {}),
+      ...(deviceId ? { device_id: deviceId } : {}),
+      ...(asid ? { asid } : {}),
       ...(psid ? { psid } : {}),
       ...(avatarUrl ? { avatar_url: avatarUrl } : {}),
     },
   });
-    return;
-  }
-
-  UrlLauncherUtil.openUrlWithExternalBrowser(ROUTES.splash);
 }

src/lib/navigation/__tests__/favorite_entry.test.ts

@@ -0,0 +1,62 @@
+import { describe, expect, it } from "vitest";
+
+import {
+  isFavoriteEntryRequest,
+  resolveFavoriteEntryMode,
+} from "../favorite_entry";
+
+describe("favorite external entry", () => {
+  it("keeps the favorite action inside an in-app browser", () => {
+    expect(
+      resolveFavoriteEntryMode({
+        hasFavoriteIntent: true,
+        isAndroid: true,
+        isIOS: false,
+        isInAppBrowser: true,
+        isInstalled: false,
+      }),
+    ).toBe("favorite");
+  });
+
+  it("turns the external Android action into Download", () => {
+    expect(
+      resolveFavoriteEntryMode({
+        hasFavoriteIntent: true,
+        isAndroid: true,
+        isIOS: false,
+        isInAppBrowser: false,
+        isInstalled: false,
+      }),
+    ).toBe("download");
+  });
+
+  it("turns the external iOS action into Saved", () => {
+    expect(
+      resolveFavoriteEntryMode({
+        hasFavoriteIntent: true,
+        isAndroid: false,
+        isIOS: true,
+        isInAppBrowser: false,
+        isInstalled: false,
+      }),
+    ).toBe("saved");
+  });
+
+  it("treats an installed PWA as saved", () => {
+    expect(
+      resolveFavoriteEntryMode({
+        hasFavoriteIntent: false,
+        isAndroid: true,
+        isIOS: false,
+        isInAppBrowser: false,
+        isInstalled: true,
+      }),
+    ).toBe("saved");
+  });
+
+  it("accepts only the explicit favorite entry marker", () => {
+    expect(isFavoriteEntryRequest("1")).toBe(true);
+    expect(isFavoriteEntryRequest("true")).toBe(false);
+    expect(isFavoriteEntryRequest(null)).toBe(false);
+  });
+});

src/lib/navigation/favorite_entry.ts

@@ -0,0 +1,51 @@
+"use client";
+
+export const FAVORITE_ENTRY_QUERY_PARAM = "favorite";
+export const FAVORITE_ENTRY_QUERY_VALUE = "1";
+
+const FAVORITE_ENTRY_STORAGE_KEY = "cozsweet:favorite_entry";
+
+export type FavoriteEntryMode = "favorite" | "download" | "saved";
+
+export interface FavoriteEntryModeInput {
+  hasFavoriteIntent: boolean;
+  isAndroid: boolean;
+  isIOS: boolean;
+  isInAppBrowser: boolean;
+  isInstalled: boolean;
+}
+
+export function resolveFavoriteEntryMode({
+  hasFavoriteIntent,
+  isAndroid,
+  isIOS,
+  isInAppBrowser,
+  isInstalled,
+}: FavoriteEntryModeInput): FavoriteEntryMode {
+  if (isInAppBrowser) return "favorite";
+  if (isInstalled) return "saved";
+  if (!hasFavoriteIntent) return "favorite";
+  if (isAndroid) return "download";
+  if (isIOS) return "saved";
+  return "saved";
+}
+
+export function isFavoriteEntryRequest(value?: string | null): boolean {
+  return value?.trim() === FAVORITE_ENTRY_QUERY_VALUE;
+}
+
+export function persistFavoriteEntryIntent(): void {
+  if (typeof window === "undefined") return;
+  window.localStorage.setItem(
+    FAVORITE_ENTRY_STORAGE_KEY,
+    FAVORITE_ENTRY_QUERY_VALUE,
+  );
+}
+
+export function hasPersistedFavoriteEntryIntent(): boolean {
+  if (typeof window === "undefined") return false;
+  return (
+    window.localStorage.getItem(FAVORITE_ENTRY_STORAGE_KEY) ===
+    FAVORITE_ENTRY_QUERY_VALUE
+  );
+}