feat(settings, version-card): 新增页面保活缓存并暂停离屏动画

为VersionCard添加IntersectionObserver，仅在卡片可见时运行Silk动画以节省GPU资源
在设置页实现页面保活缓存，保留已访问的子页组件优化切换流畅度

src/components/VersionCard.tsx

@@ -6,7 +6,7 @@ import { useRouteStore } from "@/stores/routeStore";
 import Silk from "@/components/silk/Silk";
 import clsx from "clsx";
 import { ChevronRight } from "lucide-react";
-import { Suspense } from "react";
+import { Suspense, useEffect, useRef, useState } from "react";
 
 const modeColors: Record<string, string> = {
   dev: "#F59E0B",
@@ -73,8 +73,26 @@ export function VersionCard({
     if (clickable) navigate("update");
   };
 
+  // Silk（WebGL 动画）仅在卡片可见时运行：
+  // 设置子页 keep-alive 后隐藏页仍挂在 DOM，若动画照跑会白白占 GPU/rAF →
+  // 用 IntersectionObserver 按可见性挂载/卸载 Silk（隐藏/滚出视野即暂停，观感不变）
+  const cardRef = useRef<HTMLDivElement | null>(null);
+  const [silkVisible, setSilkVisible] = useState(true);
+  useEffect(() => {
+    if (simple || !cardRef.current || typeof IntersectionObserver === "undefined") return;
+    const io = new IntersectionObserver(
+      (entries) => {
+        for (const en of entries) setSilkVisible(en.isIntersecting);
+      },
+      { root: null, threshold: 0.02 },
+    );
+    io.observe(cardRef.current);
+    return () => io.disconnect();
+  }, [simple]);
+
   return (
     <div
+      ref={cardRef}
       className={clsx(
         "relative overflow-hidden rounded-xl border border-white/10 min-h-[200px]",
         clickable && "cursor-pointer hover:scale-[1.01] active:scale-[0.99] transition-transform",
@@ -93,8 +111,8 @@ export function VersionCard({
       {/* 背景层 */}
       <div className="absolute inset-0" style={{ background: gradient }} />
 
-      {/* Silk 动画层 (非 simple 模式) */}
-      {!simple && (
+      {/* Silk 动画层 (非 simple 模式；仅卡片可见时挂载，隐藏即暂停) */}
+      {!simple && silkVisible && (
         <Suspense fallback={null}>
           <div className="absolute inset-0 opacity-60 mix-blend-soft-light">
             <Silk speed={3} scale={1.2} color={color} noiseIntensity={1.2} rotation={0.3} />

src/pages/setting/index.tsx

@@ -110,14 +110,22 @@ function buildMenuData(
 
 export function Setting() {
   const [selected, setSelected] = useState("home");
-  const [animKey, setAnimKey] = useState(0);
+  const [animOn, setAnimOn] = useState(true);
+  // 已访问过的子页缓存（keep-alive）：切换时不再全量卸载/重挂载，
+  // 避免每个子页的 VersionCard/Silk、发布说明请求等重活反复执行；隐藏页不卸载。
+  const [visited, setVisited] = useState<Record<string, boolean>>({ home: true });
   const routeNavigate = useRouteStore((s) => s.navigate);
 
   const switchPage = useCallback((key: string) => {
-    if (key === selected) return;
-    setSelected(key);
-    setAnimKey((k) => k + 1);
-  }, [selected]);
+    setSelected((prev) => {
+      if (prev === key) return prev;
+      setVisited((v) => ({ ...v, [key]: true }));
+      // 两步重放进入动画：先移除类再回加（CSS 动画重新触发，页面无需重挂载）
+      setAnimOn(false);
+      requestAnimationFrame(() => setAnimOn(true));
+      return key;
+    });
+  }, []);
 
   const handleItemClick = useCallback((item: MenuItem) => {
     if (item.onSelect) {
@@ -129,7 +137,7 @@ export function Setting() {
 
   const menuData = buildMenuData(switchPage, routeNavigate);
   const allItems = menuData.flatMap((g) => g.items);
-  const current = allItems.find((i) => i.key === selected);
+  const cachedItems = allItems.filter((i) => visited[i.key]);
 
   return (
     <div className="flex h-full">
@@ -172,11 +180,16 @@ export function Setting() {
         </nav>
       </aside>
 
-      {/* 内容区 */}
+      {/* 内容区（已访问页缓存保活；仅活动页可见并重放进入动画） */}
       <main className="scroll-area flex-1 h-full overflow-y-auto p-8">
-        <div key={animKey} className="setting-page-enter">
-          {current?.component}
-        </div>
+        {cachedItems.map((item) => {
+          const active = selected === item.key;
+          return (
+            <div key={item.key} className={active ? (animOn ? "setting-page-enter" : undefined) : "hidden"}>
+              {item.component}
+            </div>
+          );
+        })}
       </main>
     </div>
   );