feat: Complete documentation consistency across all languages

- Fixed Turkish index page design inconsistency
- Updated English and Turkish troubleshooting pages to new theme
- Updated Turkish, German, and Russian changelog pages to new theme
- Created missing contributing pages for Turkish, German, and Russian
- Updated SmartRAG version to 1.1.0 in all relevant files
- Ensured 100% consistency across all language versions
- All pages now use the same modern theme and structure
- Complete documentation standardization achieved

Author: byerlikaya

docs/assets/css/style.css

@@ -202,6 +202,45 @@ h1, h2, h3, h4, h5, h6 {
     background-color: var(--dark-surface);
 }
 
+/* Dropdown Styles */
+.navbar-nav .dropdown-menu {
+    background-color: var(--white);
+    border: 1px solid var(--gray-200);
+    border-radius: var(--border-radius);
+    box-shadow: var(--shadow-lg);
+    min-width: 160px;
+}
+
+[data-theme="dark"] .navbar-nav .dropdown-menu {
+    background-color: var(--dark-surface);
+    border-color: var(--gray-700);
+}
+
+.navbar-nav .dropdown-item {
+    color: var(--gray-700);
+    padding: var(--spacing-xs) var(--spacing-sm);
+    font-size: 0.9rem;
+    transition: all 0.2s ease;
+}
+
+[data-theme="dark"] .navbar-nav .dropdown-item {
+    color: var(--gray-300);
+}
+
+.navbar-nav .dropdown-item:hover {
+    background-color: var(--gray-100);
+    color: var(--primary);
+}
+
+[data-theme="dark"] .navbar-nav .dropdown-item:hover {
+    background-color: var(--gray-700);
+    color: var(--primary-light);
+}
+
+.navbar-nav .dropdown-toggle::after {
+    margin-left: 0.5rem;
+}
+
 /* Main Content */
 .main-content {
     margin-top: 80px;

docs/assets/js/script.js

@@ -192,15 +192,9 @@ document.addEventListener('DOMContentLoaded', function() {
     // Language switching enhancement
     const languageDropdown = document.getElementById('languageDropdown');
     if (languageDropdown) {
-        // Add click handler to prevent default behavior
-        languageDropdown.addEventListener('click', function(e) {
-            e.preventDefault();
-        });
-        
         // Add click handlers to dropdown items
         document.querySelectorAll('.dropdown-item').forEach(item => {
             item.addEventListener('click', function(e) {
-                e.preventDefault();
                 const href = this.getAttribute('href');
                 if (href) {
                     // Add smooth transition