Combo models as cover cards, not rows as wide as the window

A combo saved from picked nodes shows each model as a card like the model
library's: the cover with its slot written on it, the name and node below,
a click on the card (or Change on the cover) picks another model. The
default combo's main models and LoRAs to pick from are cover cards side by
side instead of wide rows; its empty cover is a class, not inline styles.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

web/modules/ui_notebook_editor.js

@@ -511,7 +511,7 @@ export function fillNotebookGalleries(baseModel, mainGallery, loraGallery, data)
             if (isVid) return `<video src="${m.preview_url}" muted loop playsinline></video>`;
             return `<img src="${m.preview_url}" />`;
         }
-        return `<div style="width:30px; height:30px; background:var(--amb-bg-card); border-radius:4px; display:flex; align-items:center; justify-content:center; font-size:10px; color:var(--amb-text-dim);">?</div>`;
+        return '<div class="anomalous-nb-mini-empty">?</div>';
     };
 
     fetch(`/anomalous/compatible_models?base_model=${encodeURIComponent(baseModel)}&target_type=checkpoints,unet,diffusion_models`)