Update locale files for English, Traditional Chinese, and Simplified Chinese to include new effect titles and crossfeed options; refactor EffectsPage to utilize localized labels and improve state management for audio effects.

client/src/pages/EQPage.tsx

@@ -1225,6 +1225,15 @@ export default function EQPage() {
     loadHeadphones();
   }, [api, isDemoMode, loadRawCurveForPeq]);
 
+  /** 仅耳机/型号/filters 变化时变；preamp、autoPre 变化不触发，避免拖总增益时反复请求 modelCurve */
+  const modelCurveReloadKey = useMemo(() => {
+    const peq = peqItems[headphoneIdx];
+    if (!peq) return "";
+    const filtersKey =
+      typeof peq.filters === "string" ? peq.filters : JSON.stringify(peq.filters ?? []);
+    return [headphoneIdx, peq.name ?? "", peq.brand ?? "", peq.model ?? "", filtersKey].join("\u0001");
+  }, [headphoneIdx, peqItems]);
+
   // 切换耳机型号后，立即用该型号 filters 刷新 10 个滤波器与曲线（暂停一次上报避免错写）
   useEffect(() => {
     const peq = peqItems[headphoneIdx];
@@ -1247,7 +1256,7 @@ export default function EQPage() {
     return () => {
       cancelled = true;
     };
-  }, [headphoneIdx, peqItems, loadRawCurveForPeq]);
+  }, [modelCurveReloadKey, loadRawCurveForPeq]);
 
   const schedulePeqSync = (
     peq: { name: string; autoPre?: number; preamp?: number; canDel?: number } | undefined,