Enhance theme switcher logo visibility and contrast

Scaled up the #phpmyfaq-logo for better visibility and applied color inversion to the logo image for high-contrast mode. Simplified logo image styling and removed redundant hover effects.

Author: d0ubIeU

phpmyfaq/assets/scss/layout/_theme-switcher.scss

@@ -363,8 +363,9 @@
       border-radius: 4px;
     }
   }
-  //Logo link exception - yellow border on hover instead of background
+  //Logo link exception - yellow border on hover & scale up for better visibility
   #phpmyfaq-logo {
+    transform: scale(1.3);
     border: 5px solid transparent;
     border-radius: 8px;
     padding: 2px;
@@ -376,18 +377,10 @@
       border-color: var(--bs-primary) !important;
     }
   }
+  // Logo image - invert colors for high-contrast mode
   #phpmyfaq-logo img {
     filter: brightness(0) invert(1) saturate(2);
-    transform: scale(1.3);
-    display: block;
-    border: 3px solid var(--bs-primary);
-    border-radius: 6px;
-    padding: 3px;
-  }
-
-  #phpmyfaq-logo:hover img {
-    border-color: var(--bs-primary);
-    box-shadow: 0 0 0 2px var(--bs-primary);
+    width: 100%;
   }
   // Heading style exceptions
   h1.pmf-start-page,