Names on offline penalties, mobile menu close, player drawer tidy, IP-ban bypass flag

Bans and comms saved without a player name (SimpleAdmin's offline css_addban etc.) show the
player's latest name from sa_players_ips, and the panel writes that name onto new rows it claims.
The mobile sidebar closes from a Close button, the backdrop or Escape, since it covers the Menu
button. The public player drawer drops "Right now" and "Free to play and talk." and puts the
Steam profile link after the SteamID. Adds @css/bypassipban to the permission checkboxes.

internal/web/assets/admin.html

@@ -12,6 +12,7 @@
 <body>
   <div class="app">
     <nav class="nav" id="nav" aria-label="Main">
+      <button class="btn sm ghost nav-close" type="button" id="nav-close" aria-label="Close menu">Close</button>
       <a class="brand" href="#overview">
         <svg class="brand-mark" viewBox="0 0 32 32" aria-hidden="true">
           <path d="M16 2 28 7v9c0 7-5 12-12 14C9 28 4 23 4 16V7z" fill="none" stroke="#fe113d" stroke-width="2.5"/>
@@ -35,6 +36,7 @@
         <button class="btn sm ghost" type="button" id="signout">Sign out</button>
       </div>
     </nav>
+    <div class="nav-backdrop" id="nav-backdrop" aria-hidden="true"></div>
 
     <div>
       <div class="mobile-bar">