style: Made by Galyaviev larger, clickable mailto, remove login footer

- Increase signature font: sidebar 18px, login 20px
- Wrap in <a href="mailto:ruslan@ipcom.su"> on all pages
- Remove wg.4mont.ru footer and divider from login page

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

gui/static/style.css

@@ -105,13 +105,20 @@ body {
 
 .made-by {
   font-family: 'Dancing Script', cursive;
-  font-size: 15px;
+  font-size: 18px;
   color: #b0b8cc;
   text-align: center;
   padding: 8px 0 4px;
   letter-spacing: 0.02em;
 }
 
+.made-by a {
+  color: inherit;
+  text-decoration: none;
+}
+
+.made-by a:hover { color: var(--accent); }
+
 /* ─── Layout ────────────────────────────────────────────────── */
 .layout { margin-left: var(--sidebar-w); flex: 1; display: flex; flex-direction: column; }
 main { padding: 28px 32px; flex: 1; max-width: 1400px; width: 100%; }