修复&优化听力补偿模块功能

client/src/App.tsx

@@ -1,7 +1,7 @@
-import { lazy, Suspense } from "react";
+import { lazy, Suspense, useEffect, useRef } from "react";
 import { Toaster } from "@/components/ui/sonner";
 import { TooltipProvider } from "@/components/ui/tooltip";
-import { Route, Switch, Router } from "wouter";
+import { Route, Switch, Router, useLocation } from "wouter";
 import { useHashLocation } from "wouter/use-hash-location";
 import ErrorBoundary from "./components/ErrorBoundary";
 import PageLoader from "./components/PageLoader";
@@ -15,7 +15,7 @@ import BluetoothPage from "./pages/BluetoothPage";
 import SystemPage from "./pages/SystemPage";
 import IOPage from "./pages/IOPage";
 import VUPage from "./pages/VUPage";
-import SelectPage from "./pages/SelectPage";
+import SelectPage, { consumeSelectReturnScroll } from "./pages/SelectPage";
 import CommunityPage from "./pages/CommunityPage";
 import ChangelogPage from "./pages/ChangelogPage";
 import { AIDrawerProvider } from "./contexts/AIDrawerContext";
@@ -54,6 +54,27 @@ function EffectsPageRoute() {
   );
 }
 
+/**
+ * Restores the calling page's scroll position when returning from /select.
+ * The select page is short, so the browser clamps window scroll to 0 while on
+ * it; navigateToSelect() captures the offset before navigating and we re-apply
+ * it once the calling page (e.g. Effects) has remounted.
+ */
+function SelectScrollRestore() {
+  const [location] = useLocation();
+  const prevRef = useRef(location);
+  useEffect(() => {
+    const prev = prevRef.current;
+    prevRef.current = location;
+    if (prev !== "/select" || location === "/select") return;
+    const y = consumeSelectReturnScroll();
+    if (y == null || y <= 0) return;
+    // Wait a frame so the returning page has rendered and the document has height.
+    requestAnimationFrame(() => window.scrollTo(0, y));
+  }, [location]);
+  return null;
+}
+
 function AppRouter() {
   return (
     <Switch>
@@ -85,6 +106,7 @@ function App() {
             <Toaster />
             <Router hook={useHashLocation}>
               <AIDrawerProvider>
+                <SelectScrollRestore />
                 <div className={appShellOuterClass}>
                   <div className={appShellColumnClass}>
                     <DesktopAIShell>