feat: 重构音频系统，移除外部依赖并新增WAV格式支持

- 移除install和update脚本中的aukit/austream下载配置与目标，不再部署辅助脚本
- 替换station_broadcast.lua的aukit库为CC内置dfpwm模块，重写音频播放逻辑
- 添加原生扬声器API支持，支持WAV格式音频播放
- 重写云端服务器音频处理逻辑，支持直接传输WAV文件无需预转换
- 新增WAV文件时长解析、音频序列合成等辅助功能

update_station_broadcast.lua

@@ -1,6 +1,4 @@
-local STATION_BROADCAST_URL = "https://cloud.fse-media.group/d/API/StationBroadcast/station_broadcast.lua?sign=xXsMwezjnEs4c6QrjkJkbvz1rARokmm87zwDcDDS5dk=:0"
-local AUKIT_URL = "https://cloud.fse-media.group/d/API/StationBroadcast/aukit.lua?sign=02_QDktYbSrHrtCDsFlKMkbEOWJGDautZaOtWkvg5q8=:0"
-local AUSTREAM_URL = "https://cloud.fse-media.group/d/API/StationBroadcast/austream.lua?sign=DrLbf9CIX1ZY8DaL8vliZiCMQzGos10nhG26Wf5lbgA=:0"
+local STATION_BROADCAST_URL = "https://gitea.fse-media.group/Henry_Du/CC-StationBroadcast/raw/commit/e4b4fa5cdb2bc42279fd87098fef0d27a90e23d5/station_broadcast.lua"
 
 local function fetch(url)
     if not http then
@@ -66,9 +64,7 @@ local function downloadTo(url, path)
 end
 
 local targets = {
-    { url = STATION_BROADCAST_URL, path = shell.resolve("/startup") },
-    { url = AUKIT_URL, path = shell.resolve("/aukit.lua") },
-    { url = AUSTREAM_URL, path = shell.resolve("/austream.lua") }
+    { url = STATION_BROADCAST_URL, path = shell.resolve("/startup") }
 }
 
 for _, t in ipairs(targets) do