add gameview navigation

src/components/games/GamesView.tsx

@@ -72,7 +72,10 @@ export default function GamesView({ libraryId }: Props) {
   const [selectedTagIds, setSelectedTagIds] = useState<Set<string>>(new Set())
   const [assignments, setAssignments] = useState<Record<string, string[]>>({})
   const [filterRefreshKey, setFilterRefreshKey] = useState(0)
-  const [showFilters, setShowFilters] = useState(true)
+  const [showFilters, setShowFilters] = useState(
+    () => typeof window !== 'undefined' && window.innerWidth >= 768
+  )
+  const [selectedGameIndex, setSelectedGameIndex] = useState<number | null>(null)
 
   const toggleTag = (tagId: string) =>
     setSelectedTagIds((prev) => {
@@ -147,6 +150,7 @@ export default function GamesView({ libraryId }: Props) {
   })
 
   const filtersActive = search !== '' || selectedTagIds.size > 0
+  const filteredGames = filtered.filter((i): i is Game => !('games' in i))
 
   return (
     <>
@@ -220,7 +224,7 @@ export default function GamesView({ libraryId }: Props) {
                 <GameCard
                   key={item.id}
                   game={item}
-                  onClick={() => setSelected(item)}
+                  onClick={() => { setSelected(item); setSelectedGameIndex(filteredGames.indexOf(item)) }}
                 />
               )
             )}
@@ -231,11 +235,18 @@ export default function GamesView({ libraryId }: Props) {
           <GameDetailModal
             game={selected}
             libraryId={libraryId}
-            onClose={() => setSelected(null)}
+            onClose={() => { setSelected(null); setSelectedGameIndex(null) }}
+            onPrev={selectedGameIndex !== null && selectedGameIndex > 0
+              ? () => { const g = filteredGames[selectedGameIndex - 1]; setSelected(g); setSelectedGameIndex(selectedGameIndex - 1) }
+              : undefined}
+            onNext={selectedGameIndex !== null && selectedGameIndex < filteredGames.length - 1
+              ? () => { const g = filteredGames[selectedGameIndex + 1]; setSelected(g); setSelectedGameIndex(selectedGameIndex + 1) }
+              : undefined}
             onTagsChanged={() => { setFilterRefreshKey((k) => k + 1); fetchAssignments() }}
             onCoverUploaded={() => fetchGames(true)}
             onDeleted={() => {
               setSelected(null)
+              setSelectedGameIndex(null)
               fetchGames()
               fetchAssignments()
             }}