Keep when each account was added and when it last signed in

users.created comes back, beside a new last_login, for whoever maintains
the server. A password sign-in, the token link and a request through the
proxy all count, recorded to the hour so the proxy's per-request vouching
is not a write each time. Settings -> Users and ipx user list show both.
The three user queries now share one row mapping.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01TAC7sLVqfKmY6rsTLXzNgk

src/main.rs

@@ -273,11 +273,16 @@ fn user_cmd(ctx: &Arc<Ctx>, cmd: UserCmd) -> Result<()> {
                 println!("no accounts yet: ipx user add <name>");
             }
             for u in users {
+                let added = u
+                    .created
+                    .and_then(|t| chrono::DateTime::from_timestamp(t, 0))
+                    .map_or("?".into(), |d| d.format("%Y-%m-%d").to_string());
+                let seen = u.last_login.map_or("never signed in".into(), |t| format!("signed in {}", ago(Some(t))));
                 println!(
-                    "{:<20} {:<8} {}",
+                    "{:<20} {:<6} {:<11} added {added}  {seen}",
                     u.name,
                     if u.is_admin { "admin" } else { "" },
-                    if u.pass_hash.is_some() { "password" } else { "proxy only" }
+                    if u.pass_hash.is_some() { "password" } else { "proxy only" },
                 );
             }
             Ok(())