refactor(eq): 重构EQ页面及相关代码以优化PEQ管理与同步

- 禁用Vite配置中的manus debug collector插件，减少无用请求
- 对DeviceContext添加syncPeqCatalog方法用于同步PEQ状态
- 重构luxsinApi.ts中PEQ请求相关代码，统一POST请求封装，增强错误处理
- 将EQPage相关常量、工具和组件抽取至独立模块，简化主文件结构
- 使用缓存机制记忆预设滤波器列表，减少不必要的重复计算
- 优化PEQ状态同步逻辑，支持按模式（A/B）分别保存与应用滤波器
- 实现选择耳机型号时自动保存并更新对应滤波器缓存和显示
- 修改A/B切换逻辑，使用防抖同步和固定的peqApply调用
- 为音量滑块添加thumb-only滑动样式及拖拽区域限制，提升交互体验
- Home页面ListRow组件支持显示自定义缩略图
- 增加eq/constants.ts定义滤波器类型、参数范围和样式，统一管理配置
- 解决多处EQ页面组件交互和状态切换的潜在同步问题，提高代码维护性和可读性

client/src/lib/luxsinApi.ts

@@ -260,13 +260,7 @@ export class LuxsinAPI {
   }
 
   async setPeqFilters(filters: PeqFilter[]): Promise<void> {
-    const payload = JSON.stringify({ peqChange: { filters } });
-    const encoded = encodeCustomBase64(payload);
-    await fetch(`${this.baseUrl}/dev/info.cgi`, {
-      method: "POST",
-      headers: { "Content-Type": "application/x-www-form-urlencoded" },
-      body: `json=${encodeURIComponent(encoded)}`,
-    });
+    await this.postPeqJson({ peqChange: { filters } } as PeqChangePayload);
   }
 
   /** Full peq preset: name, filters, autoPre, preamp, canDel — same encoding as legacy `upgradePeq`. */
@@ -274,30 +268,39 @@ export class LuxsinAPI {
     await this.postPeqJson(body);
   }
 
-  /** Apply current EQ filters (e.g. A/B curve switch) without a full preset save. */
+  /** Apply current EQ filters (e.g. A/B comparison curve) without saving preset metadata. */
   async upgradePeqApply(body: PeqApplyPayload): Promise<void> {
     await this.postPeqJson(body);
   }
 
+  /** POST `json=<custom-base64>` — matches legacy axios `upgradePeq`. */
   private async postPeqJson(body: PeqChangePayload | PeqApplyPayload): Promise<void> {
-    const payload = JSON.stringify(body);
-    const encoded = encodeCustomBase64(payload);
-    await fetch(`${this.baseUrl}/dev/info.cgi`, {
+    const encoded = encodeCustomBase64(JSON.stringify(body));
+    const form = new URLSearchParams();
+    form.set("json", encoded);
+    const response = await fetch(`${this.baseUrl}/dev/info.cgi`, {
       method: "POST",
-      headers: { "Content-Type": "application/x-www-form-urlencoded" },
-      body: `json=${encodeURIComponent(encoded)}`,
+      headers: { "Content-Type": "application/x-www-form-urlencoded; charset=UTF-8" },
+      body: form.toString(),
     });
+    if (!response.ok) {
+      throw new Error(`PEQ request failed: ${response.status}`);
+    }
   }
 
   /** Remove one or more headphone PEQ profiles. */
   async removePeq(names: string[]): Promise<void> {
-    const payload = JSON.stringify({ peqRemove: names });
-    const encoded = encodeCustomBase64(payload);
-    await fetch(`${this.baseUrl}/dev/info.cgi`, {
+    const encoded = encodeCustomBase64(JSON.stringify({ peqRemove: names }));
+    const form = new URLSearchParams();
+    form.set("json", encoded);
+    const response = await fetch(`${this.baseUrl}/dev/info.cgi`, {
       method: "POST",
       headers: { "Content-Type": "application/x-www-form-urlencoded; charset=UTF-8" },
-      body: `json=${encodeURIComponent(encoded)}`,
+      body: form.toString(),
     });
+    if (!response.ok) {
+      throw new Error(`PEQ remove failed: ${response.status}`);
+    }
   }
 
   setVolume(volume: number) { return this.setSetting({ volume }); }