add some user delete functionalty

src/views/admin/dashboard.ejs

@@ -77,6 +77,7 @@
               <td><a href="/player/<%= u.username %>"><%= u.username %></a></td>
               <td><%= u.is_organizer ? 'Organizer' : 'Player' %></td>
               <td>
+                <div style="display: flex; gap: 0.5rem; flex-wrap: wrap;">
                 <% if (u.is_organizer) { %>
                   <form method="POST" action="/admin/users/<%= u.id %>/role" style="margin:0;">
                     <input type="hidden" name="role" value="player">
@@ -88,6 +89,10 @@
                     <button type="submit" class="btn btn-sm btn-success">Make Organizer</button>
                   </form>
                 <% } %>
+                  <form method="POST" action="/admin/users/<%= u.id %>/delete" style="margin:0;">
+                    <button type="submit" class="btn btn-sm btn-danger" onclick="return confirm('Permanently delete the account &quot;<%= u.username %>&quot;? Their data will be anonymized.')">Delete</button>
+                  </form>
+                </div>
               </td>
             </tr>
           <% }); } %>

src/views/player/profile.ejs

@@ -107,6 +107,14 @@
         <button type="submit" class="btn btn-primary btn-sm">Change Password</button>
       </form>
     </div>
+
+    <div class="card" style="border: 2px solid var(--danger); margin-top: 1.5rem;">
+      <div class="card-header" style="color: var(--danger);">Delete Account</div>
+      <p style="color: var(--muted); font-size: 0.9rem;">Permanently delete your account. Your scan history will be anonymized but preserved in leaderboards. This cannot be undone.</p>
+      <form method="POST" action="/player/<%= profile.username %>/delete" onsubmit="return confirm('Are you sure you want to permanently delete your account? This cannot be undone.')">
+        <button type="submit" class="btn btn-danger">Delete My Account</button>
+      </form>
+    </div>
   <% } %>
 </div>