fix: InfinityFree 500 error (putenv safety), mobile dark toggle inside side panel

views/nav.php

@@ -4,12 +4,6 @@
         <a href="index.php" class="logo-link">CG</a><a href="admin/login.php" class="logo-dot-link">.</a>
     </div>
 
-    <div class="hamburger" id="hamburger" aria-label="Toggle menu" aria-expanded="false" role="button" tabindex="0">
-        <span class="bar"></span>
-        <span class="bar"></span>
-        <span class="bar"></span>
-    </div>
-
     <div class="nav-links" id="nav-links" role="navigation">
         <button class="nav-close-btn" id="nav-close-btn" aria-label="Close menu">×</button>
         <a href="index.php#about"        class="nav-item">About</a>
@@ -17,11 +11,23 @@
         <a href="index.php#certificates" class="nav-item">Certs</a>
         <a href="blog.php"               class="nav-item">Blog</a>
         <a href="index.php#contact"      class="nav-item">Contact</a>
-        <label for="dark-mode-toggle" class="mode-btn" title="Toggle Theme" aria-label="Toggle dark/light mode">
+        <label for="dark-mode-toggle" class="mode-btn mode-btn-panel" title="Toggle Theme" aria-label="Toggle dark/light mode">
             <span class="icon-moon">🌙</span>
             <span class="icon-sun">☀️</span>
         </label>
     </div>
+
+    <!-- Always-visible theme toggle (desktop + mobile nav bar) -->
+    <label for="dark-mode-toggle" class="mode-btn mode-btn-nav" title="Toggle Theme" aria-label="Toggle dark/light mode">
+        <span class="icon-moon">🌙</span>
+        <span class="icon-sun">☀️</span>
+    </label>
+
+    <div class="hamburger" id="hamburger" aria-label="Toggle menu" aria-expanded="false" role="button" tabindex="0">
+        <span class="bar"></span>
+        <span class="bar"></span>
+        <span class="bar"></span>
+    </div>
 </nav>
 
 <!-- Nav overlay backdrop -->