* Note: Track saved nftables configuration changes with Apache-style config/apply timestamp flags, expose the standard restart.cgi header action for themes, and use it as the single apply endpoint. The button expands to “Apply Changes” when saved rules need applying, while the existing Apply Configuration action now routes through restart.cgi and clears the pending state after a successful apply.
* Note: Prevent incompatible nftables sets from being used in rule fields. The rule editor now only offers address sets for address matches and port/service sets for port matches, while save and apply paths validate existing set references before writing or loading rules. This avoids nft datatype mismatch errors such as using inet_proto sets with tcp dport.
