fix: 修复音乐删除功能401认证错误

- 将原生fetch替换为ApiClient，确保JWT Authorization头正确发送
- 修复删除音乐、重命名音乐、保存音乐功能的认证问题
- 移除不必要的用户名密码字段，依赖JWT认证
- 解决因缺少Authorization头导致的401未授权错误

Issues Fixed:
- 音乐删除失败返回401错误
- 音乐操作API调用缺少认证头

src/components/selected-sounds-display/selected-sounds-display.tsx

@@ -130,17 +130,9 @@ export function SelectedSoundsDisplay() {
     if (!isAuthenticated || !user) return;
 
     try {
-      const response = await fetch('/api/auth/music/rename', {
-        method: 'POST',
-        headers: {
-          'Content-Type': 'application/json',
-        },
-        body: JSON.stringify({
-          musicId,
-          name: newName,
-          username: user.username,
-          password: sessionPassword || '',
-        }),
+      const response = await ApiClient.post('/api/auth/music/rename', {
+        musicId,
+        name: newName
       });
 
       if (!response.ok) {
@@ -172,16 +164,8 @@ export function SelectedSoundsDisplay() {
     if (!confirm('确定要删除这首音乐吗？')) return;
 
     try {
-      const response = await fetch('/api/auth/music/delete', {
-        method: 'POST',
-        headers: {
-          'Content-Type': 'application/json',
-        },
-        body: JSON.stringify({
-          musicId,
-          username: user.username,
-          password: sessionPassword || '',
-        }),
+      const response = await ApiClient.post('/api/auth/music/delete', {
+        musicId
       });
 
       if (!response.ok) {
@@ -296,19 +280,11 @@ export function SelectedSoundsDisplay() {
         volume,
         speed,
         rate,
-        random_effects,
-        username: user?.username,
-        password: sessionPassword || '' // 使用会话密码，如果为空则让后端处理
+        random_effects
       };
 
       // 调用保存API
-      const response = await fetch('/api/auth/music/save', {
-        method: 'POST',
-        headers: {
-          'Content-Type': 'application/json',
-        },
-        body: JSON.stringify(musicData),
-      });
+      const response = await ApiClient.post('/api/auth/music/save', musicData);
 
       if (response.ok) {
         const result = await response.json();