chore(favicon): 使用预发布环境的图标

src/app/tip/tip-screen.module.css

@@ -68,27 +68,7 @@
 .header {
   display: flex;
   align-items: center;
-  justify-content: space-between;
-  gap: 12px;
-}
-
-.backButton {
-  display: grid;
-  width: 42px;
-  height: 42px;
-  place-items: center;
-  border: 1px solid rgba(255, 255, 255, 0.8);
-  border-radius: 999px;
-  background: rgba(255, 255, 255, 0.72);
-  color: #382429;
-  box-shadow: 0 12px 26px rgba(112, 67, 66, 0.12);
-  cursor: pointer;
-  backdrop-filter: blur(18px);
-  transition: transform 0.18s ease, box-shadow 0.18s ease;
-}
-
-.backButton:active {
-  transform: scale(0.96);
+  justify-content: flex-end;
 }
 
 .headerPill {
@@ -506,7 +486,6 @@
 }
 
 @media (hover: hover) {
-  .backButton:hover,
   .checkoutButton:not(:disabled):hover {
     transform: translateY(-1px);
   }

src/app/tip/tip-screen.tsx

@@ -2,7 +2,7 @@
 
 import { useEffect, useMemo, useState, type CSSProperties } from "react";
 import Image from "next/image";
-import { ArrowLeft, Heart, Sparkles } from "lucide-react";
+import { Heart, Sparkles } from "lucide-react";
 
 import { CharacterAvatar } from "@/app/_components";
 import { MobileShell } from "@/app/_components/core";
@@ -206,10 +206,6 @@ export function TipScreen({
     }
   };
 
-  const handleBack = () => {
-    navigator.back();
-  };
-
   const handleResetPaidState = () => {
     paymentDispatch({ type: "PaymentReset" });
   };
@@ -229,16 +225,6 @@ export function TipScreen({
         <div className={styles.bgGlowTwo} aria-hidden="true" />
 
         <header className={styles.header}>
-          <button
-            type="button"
-            data-analytics-key="tip.back"
-            data-analytics-label="Go back from tip"
-            className={styles.backButton}
-            aria-label="Go back"
-            onClick={handleBack}
-          >
-            <ArrowLeft size={19} aria-hidden="true" />
-          </button>
           <span className={styles.headerPill}>{character.copy.tipHeader}</span>
         </header>