Fix initialization order ReferenceError in renderMobileLoginForm so mobile login container displays reliably

frontend/viewer.html

@@ -513,14 +513,16 @@
             const mobGalleryHeader = document.getElementById('mobGalleryHeader');
             const mobFilterTabs = document.getElementById('mobFilterTabs');
             const mobLoginContainer = document.getElementById('mobLoginContainer');
+            const galleryContainerEl = document.getElementById('gallery-container');
+            const creatorContainerEl = document.getElementById('creator-container');
             const mobError = document.getElementById('mobError');
 
             if (mobNavigation) mobNavigation.style.display = 'none';
             if (mobUserCredits) mobUserCredits.style.display = 'none';
             if (mobGalleryHeader) mobGalleryHeader.style.display = 'none';
             if (mobFilterTabs) mobFilterTabs.style.display = 'none';
-            if (creatorContainer) creatorContainer.style.display = 'none';
-            if (galleryContainer) galleryContainer.style.display = 'none';
+            if (creatorContainerEl) creatorContainerEl.style.display = 'none';
+            if (galleryContainerEl) galleryContainerEl.style.display = 'none';
             if (mobLoginContainer) mobLoginContainer.style.display = 'flex';
 
             if (mobError) {