feat: hide IP addresses by default, click to reveal

Added maskIp() helper that replaces IPs with ••••••••. A global
delegated click handler reveals the address on click. Applied to:
- Player list 'Address' column
- Player info 'Address' field

Styled .ip-masked with dimmed text and purple hover glow.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

rcon.css

@@ -47,6 +47,20 @@ a:hover { color: #fff; text-decoration: none; }
 /* Fade utility */
 .fade { opacity: 0.5; }
 
+/* IP address masking */
+.ip-masked {
+  cursor: pointer;
+  color: rgba(255,255,255,0.35);
+  transition: color 0.2s;
+  user-select: none;
+}
+.ip-masked:hover {
+  color: var(--rcon-accent);
+}
+.ip-revealed {
+  color: rgba(255,255,255,0.85);
+}
+
 /* Table styles */
 #PlayerListController .table-responsive {
   min-height: calc(100vh - 200px);