feat(search): 优化音乐源选择功能

- 为移动端和 PC 端分别设计不同的音乐源选择界面
- 在 PC 端添加下拉选择框，支持按优先级排序的音乐源
- 优化选择框样式，增加过渡效果和交互反馈
- 移除 PWA 安装提示相关代码

src/components/common/ActionMenu.vue

@@ -57,7 +57,7 @@ import { computed, ref } from 'vue'
 import { useFavoritesStore } from '@/stores/favorites'
 import { useToastStore } from '@/stores/toast'
 import PlaylistSelector from '@/components/playlist/PlaylistSelector.vue'
-import { utils } from '@/services/musicApi'
+import { utils, musicApi } from '@/services/musicApi'
 
 const props = defineProps({
   // 项目类型：'song' | 'playlist'
@@ -240,10 +240,16 @@ const handleAction = async (action) => {
     case 'download':
       if (!props.song) return
       try {
-        if (props.song.url) {
+        toastStore.info('正在获取下载链接...')
+        
+        const audioUrl = await musicApi.getMusicUrl(props.song.source, props.song.id, '320')
+        
+        if (audioUrl) {
           const link = document.createElement('a')
-          link.href = props.song.url
+          link.href = audioUrl
           link.download = `${utils.formatArtist(props.song.artist)} - ${props.song.name}.mp3`
+          link.target = '_blank'
+          link.rel = 'noopener noreferrer'
           document.body.appendChild(link)
           link.click()
           document.body.removeChild(link)

src/components/player/MoreActionsPanel.vue

@@ -123,7 +123,7 @@ import { computed, ref } from 'vue'
 import { useFavoritesStore } from '@/stores/favorites'
 import { useToastStore } from '@/stores/toast'
 import PlaylistSelector from '@/components/playlist/PlaylistSelector.vue'
-import { utils } from '@/services/musicApi'
+import { utils, musicApi } from '@/services/musicApi'
 
 const props = defineProps({
   song: {
@@ -225,12 +225,17 @@ const handleAction = async (action) => {
 
     case 'download':
       if (!props.song) return
-      // 实现下载功能
       try {
-        if (props.song.url) {
+        toastStore.info('正在获取下载链接...')
+        
+        const audioUrl = await musicApi.getMusicUrl(props.song.source, props.song.id, '320')
+        
+        if (audioUrl) {
           const link = document.createElement('a')
-          link.href = props.song.url
+          link.href = audioUrl
           link.download = `${utils.formatArtist(props.song.artist)} - ${props.song.name}.mp3`
+          link.target = '_blank'
+          link.rel = 'noopener noreferrer'
           document.body.appendChild(link)
           link.click()
           document.body.removeChild(link)