回退 HTTPS 与无 cookie 拉流改动：放弃 HTTPS 方案，iPhone 播放改用夸克系统解码；仅保留 *.tar.gz 与 _*.py 的 gitignore 卫生规则

internal/app/ui_playback.go

@@ -94,17 +94,6 @@ func (app *UIApp) registerPlaybackRoutes(mux *http.ServeMux) {
 	mux.HandleFunc("/api/ui/playback/progress", app.handlePlaybackProgress)
 }
 
-// recordPlaybackAssetDenial 记录媒体资产请求被拒的情况，便于诊断
-// iOS/WebKit 原生媒体管线的拉流失败（区分会话失效与观看者不匹配）。
-func (app *UIApp) recordPlaybackAssetDenial(request *http.Request, reason string) {
-	agent := request.UserAgent()
-	if len(agent) > 120 {
-		agent = agent[:120]
-	}
-	app.downloader.recordDiagnostic(diagnosticEvent{Level: "warn", Event: "playback.asset.denied",
-		HTTPStatus: http.StatusGone, Message: reason + " ua=" + agent})
-}
-
 func playbackRequestAllowed(writer http.ResponseWriter, request *http.Request, method string) bool {
 	writer.Header().Set("Cache-Control", "private, no-store, no-transform")
 	writer.Header().Set("X-Accel-Buffering", "no")