optimize codebase

main.go:
- Eliminated ~160 lines of duplicate code: Extracted 3 new helper functions at the bottom of the file:
buildVideoMenuOptions([]VideoOption) — builds the Discord select menu options for video formats
buildAudioMenuOptions([]AudioOption) — same for audio
fetchAndShowFormats(s, i, url) — fetches formats, sorts them, builds menus, stores state, and edits the interaction; previously duplicated identically in both the download and download video command handlers
- Fixed time.Sleep ordering bug: The startAsyncDownload goroutine was launched before InteractionRespond with a 100ms sleep to compensate. Now the download is launched after InteractionRespond returns — no sleep needed. Removed "time" import.
- Used helpers in video_select handler: The two inline menu-building loops in that handler now call buildAudioMenuOptions / buildVideoMenuOptions

misc.go:
- Moved regexp.MustCompile(...) to a package-level var urlPattern — previously it recompiled the regex on every call to extractURLFromString
- Simplified the function body to a single return line

app/go.mod

@@ -2,13 +2,9 @@ module git.dubyatp.xyz/williamp/yt-dlp-bot
 
 go 1.25.2
 
-//replace github.com/lrstanley/go-ytdlp => /home/williamp/go-ytdlp
-
-replace github.com/lrstanley/go-ytdlp => github.com/dubyatp/go-ytdlp v0.0.0-20260308044557-db32b29c1590
-
 require (
 	github.com/bwmarrin/discordgo v0.29.0
-	github.com/lrstanley/go-ytdlp v1.3.2
+	github.com/lrstanley/go-ytdlp v1.3.3
 )
 
 require (