MemoServ SENDALL + ChanServ AKICK CLEAR

SENDALL (admin) leaves a memo on every registered account for a
network-wide announcement that persists until read. AKICK CLEAR empties a
channel's auto-kick list in one command.

modules/memoserv/src/sendall.rs

@@ -0,0 +1,24 @@
+use echo_api::{Priv, Sender, ServiceCtx, Store};
+
+// SENDALL <text>: leave a memo on every registered account. Admin-only, for
+// network-wide announcements that persist until read.
+pub fn handle(me: &str, from: &Sender, account: &str, args: &[&str], ctx: &mut ServiceCtx, db: &mut dyn Store) {
+    if !from.privs.has(Priv::Admin) {
+        ctx.notice(me, from.uid, "Access denied — SENDALL needs the \x02admin\x02 privilege.");
+        return;
+    }
+    if args.len() < 2 {
+        ctx.notice(me, from.uid, "Syntax: SENDALL <text>");
+        return;
+    }
+    let text = args[1..].join(" ");
+    // Snapshot the names first so the immutable read ends before we send.
+    let names: Vec<String> = db.accounts_matching("*").into_iter().map(|a| a.name).collect();
+    let mut sent = 0usize;
+    for name in &names {
+        if db.memo_send(name, account, &text).is_ok() {
+            sent += 1;
+        }
+    }
+    ctx.notice(me, from.uid, format!("Memo sent to \x02{sent}\x02 account(s)."));
+}