Link "Become a member" CTAs directly to the signup form

Every body CTA (hero buttons, join-cta sections, article sidebars,
activities CTA) now points to become-a-member/#join-form so a click
lands on the form instead of the top of the page. The header menu
tab (btn-secondary) is intentionally left pointing at the page root.

93 links across 45 pages (en/mk/si). HTML-only, self-templated build
preserves the sidebar CTAs, so no rebuild/cache-bust needed.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

mk/projects/sepa-webinar-2026/index.html

@@ -222,7 +222,7 @@
                 </nav>
                 <div class="sidebar-cta">
                     <p class="sidebar-cta-title">Ти се допаѓа тоа што го правиме?</p>
-                    <a class="sidebar-cta-btn" href="../../../mk/become-a-member/">Стани член</a>
+                    <a class="sidebar-cta-btn" href="../../../mk/become-a-member/#join-form">Стани член</a>
                     <p class="sidebar-cta-note">Или <a href="../../../mk/support/">поддржи го МСОС</a> за да создаваме уште повеќе вакви моменти.</p>
                 </div>
             </aside>
@@ -284,7 +284,7 @@
                 <h3>Ти се допаѓа тоа што го правиме?</h3>
                 <p>Стани член или поддржи го МСОС за да создаваме уште повеќе вакви моменти.</p>
                 <div class="asc-actions">
-                    <a class="btn btn-primary-orange" href="../../../mk/become-a-member/">Стани член</a>
+                    <a class="btn btn-primary-orange" href="../../../mk/become-a-member/#join-form">Стани член</a>
                     <a class="btn btn-secondary" href="../../../mk/support/">Поддржи го МСОС</a>
                 </div>
             </div>