feat: Light mode default, auth, Posts rename, display scaling, TinyMCE improvements

Views/Shared/_AdminLayout.cshtml

@@ -8,9 +8,8 @@
     <link href="https://cdn.jsdelivr.net/npm/bootstrap-icons@1.11.3/font/bootstrap-icons.min.css" rel="stylesheet" />
     <link href="/css/admin.css" rel="stylesheet" />
     <script>
-        // Apply saved theme immediately to prevent flash
         (function() {
-            var t = localStorage.getItem('sb-theme') || 'dark';
+            var t = localStorage.getItem('sb-theme') || 'light';
             document.documentElement.setAttribute('data-theme', t);
         })();
     </script>
@@ -42,17 +41,25 @@
                 <li>
                     <a href="/admin/devices" class="@(ViewContext.RouteData.Values["controller"]?.ToString() == "Devices" ? "active" : "")">
                         <i class="bi bi-display"></i>
-                        <span>Kittens</span>
+                        <span>Posts</span>
                         <small class="nav-hint">Devices</small>
                     </a>
                 </li>
             </ul>
 
             <div class="sidebar-footer">
-                <small>Sunbeam v1.0</small>
-                <button id="themeToggle" class="theme-toggle" title="Toggle theme">
-                    <i class="bi bi-sun"></i>
-                </button>
+                <div>
+                    <small>Sunbeam v1.0</small><br />
+                    <small style="opacity:0.5;">&copy; Jess Rogerson — 2026</small>
+                </div>
+                <div class="d-flex gap-1">
+                    <button id="themeToggle" class="theme-toggle" title="Toggle theme">
+                        <i class="bi bi-moon-stars"></i>
+                    </button>
+                    <a href="/account/logout" class="theme-toggle" title="Sign Out">
+                        <i class="bi bi-box-arrow-right"></i>
+                    </a>
+                </div>
             </div>
         </nav>