fix: remove blue active state from zoom button and restore Show Zoom menu item

- Removed .zoom-active CSS class and JavaScript logic
- Zoom button stays same gray color whether zoom is on or off
- Fixed Show Zoom menu button visibility (changed inline style to zoom-hidden class)
- Menu item now correctly appears when zoom is hidden

static/js/main.js

@@ -362,12 +362,12 @@
             if (show) {
                 zoomControl.classList.remove('zoom-hidden');
                 if (showBtn) showBtn.classList.add('zoom-hidden');
-                if (toggleBtn) toggleBtn.classList.add('zoom-active');
+                // Don't add zoom-active class - button stays same color
                 localStorage.setItem('cv-zoom-visible', 'true');
             } else {
                 zoomControl.classList.add('zoom-hidden');
                 if (showBtn) showBtn.classList.remove('zoom-hidden');
-                if (toggleBtn) toggleBtn.classList.remove('zoom-active');
+                // Don't remove zoom-active class - wasn't added
                 localStorage.setItem('cv-zoom-visible', 'false');
             }
         }
@@ -403,15 +403,8 @@
             });
         }
 
-        // Set initial toggle button state (only active if explicitly 'true')
+        // No need to set initial state since we don't use zoom-active class anymore
         const isVisible = localStorage.getItem('cv-zoom-visible');
-        if (toggleBtn) {
-            if (isVisible === 'true') {
-                toggleBtn.classList.add('zoom-active');
-            } else {
-                toggleBtn.classList.remove('zoom-active');
-            }
-        }
 
         console.log('Zoom control initialized. localStorage cv-zoom-visible:', isVisible);
     }