Make Direct Site URL Slugs Case-Insensitive

Currently, direct site URL slugs are case sensitive, meaning links entered with uppercase letters (e.g., /MyListing) do not resolve the same as lowercase versions (e.g., /mylisting). This can cause confusion for guests and hosts who manually type or share URLs. Request to make slug handling case-insensitive or automatically redirect mixed-case entries to the lowercase version for improved usability and consistency.