feat: token field ON by default in FREE, donate links everywhere

- server.js: ALLOW_COMMUNITY_GITHUB_ACTIVATION defaults to true for
  community edition (disable explicitly with =0/false/no/off)
- app.js: updated hint text when field is disabled by owner
- public/index.html: donate links block on login screen
- public/styles.css: .gate-donate styles
- landing: proj-support-strip with donate links
- README: unified "Поддержка проекта" block + blockquote at top
- .github/FUNDING.yml: Boosty + Ozon + Telegram
- scripts/install.sh: updated comment header
- version bumped to 1.2.28

Co-authored-by: Cursor <cursoragent@cursor.com>

landing/index.html

@@ -21,6 +21,19 @@
   </div>
 </header>
 
+<div class="proj-support-strip" role="navigation" aria-label="Поддержка и донат — проект панелей">
+  <div class="proj-support-inner">
+    <span class="proj-support-lead">Панели Amnezia Admin · поддержать проект:</span>
+    <a href="https://github.com/andrey271192/amnezia_web" target="_blank" rel="noopener noreferrer">⭐ GitHub</a>
+    <span class="proj-support-dot" aria-hidden="true">·</span>
+    <a href="https://boosty.to/andrey27/donate" target="_blank" rel="noopener noreferrer">💖 Boosty</a>
+    <span class="proj-support-dot" aria-hidden="true">·</span>
+    <a href="https://finance.ozon.ru/apps/sbp/ozonbankpay/019dc200-2a5d-7931-a619-782d285f6798" target="_blank" rel="noopener noreferrer">💳 Ozon&nbsp;СБП</a>
+    <span class="proj-support-dot" aria-hidden="true">·</span>
+    <a href="https://t.me/lot_andrey" target="_blank" rel="noopener noreferrer">✉️ Telegram&nbsp;@lot_andrey</a>
+  </div>
+</div>
+
 <section class="hero">
   <div class="hero-badge">Частный сервер</div>
   <h1>Подключение к VPN</h1>