Persist CS TOPIC so KEEPTOPIC and TOPICLOCK keep the set topic

modules/chanserv/src/topic.rs

@@ -2,7 +2,7 @@ use echo_api::Store;
 use echo_api::{Sender, ServiceCtx};
 
 // TOPIC <#channel> <text>: set the channel topic (empty clears it).
-pub fn handle(me: &str, from: &Sender, args: &[&str], ctx: &mut ServiceCtx, db: &dyn Store) {
+pub fn handle(me: &str, from: &Sender, args: &[&str], ctx: &mut ServiceCtx, db: &mut dyn Store) {
     let Some(&chan) = args.get(1) else {
         ctx.notice(me, from.uid, "Syntax: TOPIC <#channel> <text>");
         return;
@@ -12,5 +12,9 @@ pub fn handle(me: &str, from: &Sender, args: &[&str], ctx: &mut ServiceCtx, db:
     }
     let text = if args.len() > 2 { args[2..].join(" ") } else { String::new() };
     ctx.topic(me, chan, &text);
+    // Persist it too: the ircd filters our own FTOPIC back out, so without this the
+    // stored topic stays stale and KEEPTOPIC/TOPICLOCK restore the old one on
+    // recreation/restart. Ignore NoChannel (require_op already proved it exists).
+    let _ = db.set_channel_topic(chan, &text);
     ctx.notice(me, from.uid, format!("Topic for \x02{chan}\x02 updated."));
 }