feat: 文件代理、群消息防双发、下载指令出选歌菜单与音频平台选集

- 文件代理（PUBLIC_URL）：上传与直链文本的 URL 换成 bot 公开地址，请求
  到来现场重解析直链再转发字节，绕开 QQ 抓风控直链失败（40093007）与
  qs 本地流外网不可达；PROXY_PORT 指定监听端口
- 群消息去重补第二把钥匙：全量模式下 @消息同时命中两事件且 msg_id 不同，
  只按 msg_id 拦不住，再加「群+发送人+文本」10 秒短窗（修双发）
- 「<平台>下载 <歌名>」改出该平台的选歌菜单（与 /点歌 同款交互、spage
  翻页锁定平台），不再直接下第一首
- 猫耳/懒人/蜻蜓节目级条目点编号先出选集菜单（/album）：猫耳选集接口
  忽略翻页参数，一次拉 50 集本地切片；懒人/蜻蜓走服务端翻页；空选集
  （已下线/需登录）给明确提示
- 指令面板条目按 /sources 现算、按宽度裁剪（修 30013 超限）；装配入口
  改用 Bot 门面；qqbotsdk 依赖更名 qqbotsdk-py（撤 GitHub archive 源）

uv.lock

@@ -473,7 +473,7 @@ version = "0.1.0"
 source = { editable = "." }
 dependencies = [
     { name = "loguru" },
-    { name = "qqbotsdk" },
+    { name = "qqbotsdk-py" },
 ]
 
 [package.dev-dependencies]
@@ -487,7 +487,7 @@ dev = [
 [package.metadata]
 requires-dist = [
     { name = "loguru" },
-    { name = "qqbotsdk", url = "https://github.com/snowy-yang/qqbotsdk/archive/refs/heads/main.tar.gz" },
+    { name = "qqbotsdk-py" },
 ]
 
 [package.metadata.requires-dev]
@@ -688,9 +688,9 @@ wheels = [
 ]
 
 [[package]]
-name = "qqbotsdk"
-version = "0.1.0"
-source = { url = "https://github.com/snowy-yang/qqbotsdk/archive/refs/heads/main.tar.gz" }
+name = "qqbotsdk-py"
+version = "0.2.0"
+source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "aiohttp" },
     { name = "cryptography" },
@@ -698,15 +698,9 @@ dependencies = [
     { name = "python-dotenv" },
     { name = "ujson" },
 ]
-sdist = { hash = "sha256:162be4706f256ccee5e371232d591776ce0997cb5481f61554a9b16e1b569bf5" }
-
-[package.metadata]
-requires-dist = [
-    { name = "aiohttp", specifier = ">=3.14.3" },
-    { name = "cryptography", specifier = ">=50.0.1" },
-    { name = "loguru", specifier = ">=0.7.3" },
-    { name = "python-dotenv", specifier = ">=1.2.3" },
-    { name = "ujson", specifier = ">=6.0.0" },
+sdist = { url = "https://files.pythonhosted.org/packages/6c/a2/9f5fb85a940df97a394f996739a52b4d8bcadba77bd3883bd1292ee1bc80/qqbotsdk_py-0.2.0.tar.gz", hash = "sha256:bb5e02ff3ba05a78a95418fde01f54e5d37880abdd61e27f52db06afd854243e", size = 39584, upload-time = "2026-10-03T12:12:12.058Z" }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/c0/9a/c7bf69fecd03ef7805b6af566ef91cafc7692adeefced4b447b60ea52063/qqbotsdk_py-0.2.0-py3-none-any.whl", hash = "sha256:84550cc53547377b13cb7d0ff78ac1a0df3cc733f81facf2783f3dcbe6801ab6", size = 52247, upload-time = "2026-10-03T12:12:10.763Z" },
 ]
 
 [[package]]