fix: improve media grouping and bot startup

internal/service/media_paths.go

@@ -278,47 +278,3 @@ func isRelativeVolumeMarkerPath(path string) bool {
 	}
 	return false
 }
-
-func cleanPathForVolumeMapping(path string) string {
-	path = strings.TrimSpace(path)
-	if path == "" {
-		return ""
-	}
-	path = strings.ReplaceAll(path, "\\", "/")
-	path = trimEmbeddedWindowsDrive(path)
-	return filepath.ToSlash(filepath.Clean(filepath.FromSlash(path)))
-}
-
-func pathAfterWindowsDrivePrefix(path string) string {
-	if len(path) >= 3 && path[1] == ':' && path[2] == '/' && isASCIIAlpha(path[0]) {
-		return path[2:]
-	}
-	return path
-}
-
-func trimEmbeddedWindowsDrive(path string) string {
-	for i := 0; i+2 < len(path); i++ {
-		if !isASCIIAlpha(path[i]) || path[i+1] != ':' || path[i+2] != '/' {
-			continue
-		}
-		if i == 0 || path[i-1] == '/' {
-			return path[i:]
-		}
-	}
-	return path
-}
-
-func isASCIIAlpha(ch byte) bool {
-	return (ch >= 'a' && ch <= 'z') || (ch >= 'A' && ch <= 'Z')
-}
-
-func sameLibraryPath(a, b string) bool {
-	return filepath.Clean(a) == filepath.Clean(b)
-}
-
-func envOrDefault(key, fallback string) string {
-	if value := strings.TrimSpace(os.Getenv(key)); value != "" {
-		return value
-	}
-	return fallback
-}