fixed gallery display bug

frontend/src/components/ui/FinishedDownloads.tsx

@@ -2281,6 +2281,33 @@ export default function FinishedDownloads({
     DEFAULT_GALLERY_PAGE_SIZE
   )
 
+  const lastGalleryScaleIndexRef = useRef(galleryCardScaleIndex)
+
+  const handleGalleryRecommendedPageSizeChange = useCallback((rawSize: number) => {
+    const rounded = Math.round(Number(rawSize))
+    if (!Number.isFinite(rounded) || rounded <= 0) return
+
+    const next = Math.max(1, Math.min(24, rounded))
+
+    setGalleryPageSize((current) => {
+      const scaleChanged = lastGalleryScaleIndexRef.current !== galleryCardScaleIndex
+
+      if (scaleChanged) {
+        lastGalleryScaleIndexRef.current = galleryCardScaleIndex
+        return next
+      }
+
+      // Wichtig:
+      // Nach Page-Wechsel/ResizeObserver kann kurz 8 statt 10 gemeldet werden.
+      // Nicht automatisch verkleinern, sonst verschwinden bereits geladene Cards.
+      if (next < current) {
+        return current
+      }
+
+      return next
+    })
+  }, [galleryCardScaleIndex])
+
   const effectivePageSize =
     view === 'gallery'
       ? galleryPageSize
@@ -2535,8 +2562,7 @@ export default function FinishedDownloads({
     showOnlyCorrupt,
   ])
 
-  const finishedDownloadsLoading =
+  const finishedDownloadsLoading = allDoneJobsLoading
-    allDoneJobsLoading && globalFilterActive && allDoneJobs === null
 
   const totalItemsForPagination =
     finishedDownloadsLoading
@@ -5562,7 +5588,7 @@ export default function FinishedDownloads({
               forcePreviewMuted={forcePreviewMuted}
               cardScale={galleryCardScale}
               renderPostworkBadge={renderClickablePostworkBadge}
-              onRecommendedPageSizeChange={setGalleryPageSize}
+              onRecommendedPageSizeChange={handleGalleryRecommendedPageSizeChange}
               assetNonce={assetNonce ?? 0}
               renderIntegrityBadge={renderIntegrityBadge}
               renderRatingOverlay={renderRatingOverlay}