Restore help command description details: playerName param, admin only note, average params

Co-authored-by: dmccoystephenson <21204351+dmccoystephenson@users.noreply.github.com>

Author: Copilot

src/main/java/dansplugins/activitytracker/commands/HelpCommand.java

@@ -24,11 +24,11 @@ public boolean execute(CommandSender sender) {
                           ChatColor.RESET + ChatColor.GOLD + " ─ Commands");
         sender.sendMessage(ChatColor.GOLD + "│ " + ChatColor.AQUA + "/at help " + ChatColor.GRAY + "- View a list of helpful commands.");
         sender.sendMessage(ChatColor.GOLD + "│ " + ChatColor.AQUA + "/at info " + ChatColor.GRAY + "- View your activity record.");
-        sender.sendMessage(ChatColor.GOLD + "│ " + ChatColor.AQUA + "/at info (player) " + ChatColor.GRAY + "- View a player's activity record.");
-        sender.sendMessage(ChatColor.GOLD + "│ " + ChatColor.AQUA + "/at list " + ChatColor.GRAY + "- View the 10 most recent sessions.");
+        sender.sendMessage(ChatColor.GOLD + "│ " + ChatColor.AQUA + "/at info (playerName) " + ChatColor.GRAY + "- View a player's activity record.");
+        sender.sendMessage(ChatColor.GOLD + "│ " + ChatColor.AQUA + "/at list " + ChatColor.GRAY + "- View the 10 most recent sessions (admin only).");
         sender.sendMessage(ChatColor.GOLD + "│ " + ChatColor.AQUA + "/at top " + ChatColor.GRAY + "- View the most active players.");
         sender.sendMessage(ChatColor.GOLD + "│ " + ChatColor.AQUA + "/at stats " + ChatColor.GRAY + "- View activity stats for the server.");
-        sender.sendMessage(ChatColor.GOLD + "│ " + ChatColor.AQUA + "/at average " + ChatColor.GRAY + "- View average daily activity.");
+        sender.sendMessage(ChatColor.GOLD + "│ " + ChatColor.AQUA + "/at average [player] [days] " + ChatColor.GRAY + "- Avg daily activity (default: 7 days).");
         sender.sendMessage(ChatColor.GOLD + "│ " + ChatColor.AQUA + "/at config " + ChatColor.GRAY + "- Show or set config options.");
         sender.sendMessage(ChatColor.GOLD + "└─────────────────────────");
         return true;