chore: cleanup website files

- Remove website/dashboards/ directory
- Remove website/aitbc-proxy.conf
- Remove website/README.md
- Update website documentation files with minimum Python version
- Update website assets (CSS, JS) for improved performance
- Update docs/ with minimum Python version and updated paths

website/assets/js/global-header.js

@@ -1,12 +1,4 @@
 (function () {
-  // Always enforce dark theme
-  document.documentElement.setAttribute('data-theme', 'dark');
-  document.documentElement.classList.add('dark');
-  
-  // Clean up any old user preferences
-  if (localStorage.getItem('theme')) localStorage.removeItem('theme');
-  if (localStorage.getItem('exchangeTheme')) localStorage.removeItem('exchangeTheme');
-
   const NAV_ITEMS = [
     { key: 'home', label: 'Home', href: '/' },
     { key: 'explorer', label: 'Explorer', href: '/explorer/' },
@@ -15,6 +7,8 @@
     { key: 'docs', label: 'Docs', href: '/docs/index.html' },
   ];
 
+  const CTA = { label: 'Launch Marketplace', href: '/marketplace/' };
+
   function determineActiveKey(pathname) {
     if (pathname.startsWith('/explorer')) return 'explorer';
     if (pathname.startsWith('/marketplace')) return 'marketplace';
@@ -42,11 +36,64 @@
             </div>
           </a>
           <nav class="global-nav">${navLinks}</nav>
+          <div class="global-header__actions">
+            <button type="button" class="global-dark-toggle" data-role="global-theme-toggle">
+              <span class="global-dark-toggle__emoji">🌙</span>
+              <span class="global-dark-toggle__text">Dark</span>
+            </button>
+            <a href="${CTA.href}" class="global-nav__cta">${CTA.label}</a>
+          </div>
         </div>
       </header>
     `;
   }
 
+  function getCurrentTheme() {
+    if (document.documentElement.hasAttribute('data-theme')) {
+      return document.documentElement.getAttribute('data-theme');
+    }
+    if (document.documentElement.classList.contains('dark')) return 'dark';
+    if (document.body && document.body.classList.contains('light')) return 'light';
+    return 'light';
+  }
+
+  function updateToggleLabel(theme) {
+    const emojiEl = document.querySelector('.global-dark-toggle__emoji');
+    const textEl = document.querySelector('.global-dark-toggle__text');
+    if (!emojiEl || !textEl) return;
+    if (theme === 'dark') {
+      emojiEl.textContent = '🌙';
+      textEl.textContent = 'Dark';
+    } else {
+      emojiEl.textContent = '☀️';
+      textEl.textContent = 'Light';
+    }
+  }
+
+  function bindThemeToggle() {
+    const toggle = document.querySelector('[data-role="global-theme-toggle"]');
+    if (!toggle) return;
+
+    toggle.addEventListener('click', () => {
+      if (typeof window.toggleDarkMode === 'function') {
+        window.toggleDarkMode();
+      } else if (typeof window.toggleTheme === 'function') {
+        window.toggleTheme();
+      } else {
+        const isDark = document.documentElement.classList.toggle('dark');
+        if (isDark) {
+          document.documentElement.setAttribute('data-theme', 'dark');
+        } else {
+          document.documentElement.removeAttribute('data-theme');
+        }
+      }
+
+      setTimeout(() => updateToggleLabel(getCurrentTheme()), 0);
+    });
+
+    updateToggleLabel(getCurrentTheme());
+  }
+
   function initHeader() {
     const activeKey = determineActiveKey(window.location.pathname);
     const headerHTML = buildHeader(activeKey);
@@ -59,6 +106,8 @@
     } else {
       document.body.insertAdjacentHTML('afterbegin', headerHTML);
     }
+
+    bindThemeToggle();
   }
 
   if (document.readyState === 'loading') {