feat: implement responsive mobile navigation header and wiki sidebar drawer

- Refactored templates/base.html to hide navigation on mobile and expose a hamburger menu button.
- Built a right-aligned sliding mobile menu drawer sheet in base.html.
- Hidden the documentation sidebar in templates/docs/sidebar.html by default on mobile, placing it inside a left-aligned sliding drawer sheet.
- Added a floating 'Explore Guides' directory trigger bar at the top of doc pages on mobile.
- Updated static/js/components.js to apply active route highlighting globally to both desktop and mobile sidebars.

static/js/components.js

@@ -626,17 +626,14 @@ document.addEventListener('DOMContentLoaded', () => {
 
     // --- SIDEBAR NAVIGATION ACTIVE HIGHLIGHTING ---
     const currentPath = window.location.pathname;
-    const sidebar = document.getElementById('wiki-sidebar');
-    if (sidebar) {
-        sidebar.querySelectorAll('a[data-wiki-path]').forEach(link => {
-            const path = link.getAttribute('data-wiki-path');
-            if (currentPath === path) {
-                link.className = 'flex items-center px-3 py-2 text-xs font-semibold rounded-lg bg-indigo-600/20 text-indigo-400 border border-indigo-500/10 transition';
-            } else {
-                link.className = 'flex items-center px-3 py-2 text-xs font-semibold text-muted-foreground hover:text-white rounded-lg hover:bg-accent hover:text-accent-foreground transition';
-            }
-        });
-    }
+    document.querySelectorAll('a[data-wiki-path]').forEach(link => {
+        const path = link.getAttribute('data-wiki-path');
+        if (currentPath === path) {
+            link.className = 'flex items-center px-3 py-2 text-xs font-semibold rounded-lg bg-indigo-600/20 text-indigo-400 border border-indigo-500/10 transition';
+        } else {
+            link.className = 'flex items-center px-3 py-2 text-xs font-semibold text-muted-foreground hover:text-white rounded-lg hover:bg-secondary transition';
+        }
+    });
 
     // --- CUSTOM SELECT DROPDOWN LOGIC ---
     document.addEventListener('click', (event) => {