Add character teleport, delete, and account kick/delete to admin panel

Traced how login placement actually works: CPlayer login placement
(Src/World Server/worldpackets.cpp:27, pakPlayer) calls
GetRespawnByID(Position->respawn), and Position->respawn is loaded
straight from characters.respawnid (playerdata.cpp:110). So setting
respawnid to a Src/World Server list_respawnzones.id is a real, live
lever over where a character logs in next -- not a vestigial column
(unlike characters.townid, which turned out to be dead: the only
other code path that reads it is commented-out dead code in
pakUserDied, superseded by CPlayer::RespawnPlayer which uses an
in-memory Position->saved instead).

Added to the character edit page: a teleport dropdown grouped by map,
populated from list_respawnzones, wired straight to respawnid (takes
effect on the character's next login same as other stat edits) and a
delete-character action. Added to the account edit page: delete
account (characters are kept) and a "reset online flag" action for
accounts stuck thinking they're still logged in after a crash.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

webadmin/templates/edit_account.html

@@ -2,7 +2,9 @@
 {% block title %}{{ account.username }} - ROSS Admin{% endblock %}
 {% block content %}
 <div class="card" style="max-width:480px;">
-  <h2 style="margin-top:0;">Account: {{ account.username }}</h2>
+  <h2 style="margin-top:0;">Account: {{ account.username }}
+    {% if account.online %}<span class="badge ok">online</span>{% else %}<span class="badge off">offline</span>{% endif %}
+  </h2>
   <form method="post">
     <label>Accesslevel (100 = normaler Spieler, 900 = Admin)</label>
     <input type="number" name="accesslevel" value="{{ account.accesslevel }}">
@@ -30,4 +32,15 @@
     {% endfor %}
   </table>
 </div>
+<div class="card" style="max-width:480px;border-color:#5a2530;">
+  <h3 style="margin-top:0;color:var(--danger);">Gefahrenzone</h3>
+  <form method="post" action="{{ url_for('kick_account', account_id=account.id) }}" style="margin-bottom:12px;">
+    <button type="submit" class="secondary">Online-Status zurücksetzen</button>
+    <p style="color:var(--muted);font-size:12px;">Nützlich wenn der Account nach einem Server-Crash als "online" hängen geblieben ist und sich nicht neu einloggen kann.</p>
+  </form>
+  <form method="post" action="{{ url_for('delete_account', account_id=account.id) }}"
+        onsubmit="return confirm('Account {{ account.username }} wirklich unwiderruflich löschen? (Charaktere bleiben erhalten)');">
+    <button type="submit" style="background:var(--danger);">Account löschen</button>
+  </form>
+</div>
 {% endblock %}