fix: preserve result thumbnail aspect ratios

src/components/HoverImagePreview.tsx

@@ -11,7 +11,9 @@ type PreviewState = {
 
 function parseRatio(aspectRatio?: string) {
   if (!aspectRatio || aspectRatio === 'long') return aspectRatio === 'long' ? 1 / 3 : 1;
-  const [w, h] = aspectRatio.split(':').map(Number);
+  const [w, h] = aspectRatio.includes('/')
+    ? aspectRatio.split('/').map(part => Number(part.trim()))
+    : aspectRatio.split(':').map(Number);
   return w && h ? w / h : 1;
 }
 
@@ -42,11 +44,13 @@ export function HoverImagePreview({
   alt,
   imageClassName,
   aspectRatio,
+  onImageLoad,
 }: {
   src: string;
   alt: string;
   imageClassName?: string;
   aspectRatio?: string;
+  onImageLoad?: (image: HTMLImageElement) => void;
 }) {
   const [preview, setPreview] = useState<PreviewState | null>(null);
 
@@ -61,6 +65,7 @@ export function HoverImagePreview({
           setPreview(nextPreviewState(event, aspectRatio));
         }}
         onPointerLeave={() => setPreview(null)}
+        onLoad={event => onImageLoad?.(event.currentTarget)}
       />
       {preview && (
         <div

src/components/ResultGrid.tsx

@@ -1,6 +1,6 @@
 'use client';
 
-import { useEffect } from 'react';
+import { useEffect, useState } from 'react';
 import type { GenImage } from '@/lib/types';
 import { HoverImagePreview } from './HoverImagePreview';
 
@@ -10,6 +10,8 @@ export type ResultGridProps = {
 };
 
 export default function ResultGrid({ images, onAction }: ResultGridProps) {
+  const [ratios, setRatios] = useState<Record<string, string>>({});
+
   useEffect(() => {
     function handler(e: KeyboardEvent) {
       const target = e.target as HTMLElement;
@@ -27,7 +29,7 @@ export default function ResultGrid({ images, onAction }: ResultGridProps) {
     return () => window.removeEventListener('keydown', handler);
   }, [images, onAction]);
 
-  const cols = images.length <= 4 ? 'grid-cols-2' : images.length <= 9 ? 'grid-cols-3' : 'grid-cols-4';
+  const cols = images.length === 1 ? 'grid-cols-[minmax(220px,520px)]' : images.length <= 4 ? 'grid-cols-2' : images.length <= 9 ? 'grid-cols-3' : 'grid-cols-4';
   const selectedCount = images.filter(i => i.status === 'selected').length;
 
   return (
@@ -51,13 +53,24 @@ export default function ResultGrid({ images, onAction }: ResultGridProps) {
         </div>
       </div>
 
-      <div className={`grid ${cols} gap-3`}>
+      <div className={`grid ${cols} items-start gap-3`}>
         {images.map((img, i) => (
           <div
             key={img.id}
             className={`tile group ${img.status === 'selected' ? 'tile-selected' : ''} ${img.status === 'rejected' ? 'tile-rejected' : ''}`}
+            style={{ aspectRatio: ratios[img.id] ?? '1 / 1' }}
           >
-            <HoverImagePreview src={img.url} alt={`gen ${i + 1}`} imageClassName="w-full h-full object-contain bg-white" />
+            <HoverImagePreview
+              src={img.url}
+              alt={`gen ${i + 1}`}
+              aspectRatio={ratios[img.id]}
+              imageClassName="w-full h-full object-contain bg-white"
+              onImageLoad={image => {
+                if (!image.naturalWidth || !image.naturalHeight) return;
+                const next = `${image.naturalWidth} / ${image.naturalHeight}`;
+                setRatios(prev => prev[img.id] === next ? prev : { ...prev, [img.id]: next });
+              }}
+            />
             <div className="tile-keynum">{i + 1}</div>
 
             {img.status === 'selected' && (