add folders page, hevc 4k support

src/App.tsx

@@ -13,6 +13,7 @@ import HomePage from './pages/HomePage'
 import { useNewReleaseNotifications } from './hooks/use-new-releases'
 
 const LibraryPage = lazy(() => import('./pages/LibraryPage'))
+const FoldersPage = lazy(() => import('./pages/FoldersPage'))
 const DetailPage = lazy(() => import('./pages/DetailPage'))
 const MusicPage = lazy(() => import('./pages/MusicPage'))
 const SearchPage = lazy(() => import('./pages/SearchPage'))
@@ -233,6 +234,7 @@ export default function App() {
             <Route index element={<PageMotion><LandingRedirect /></PageMotion>} />
             <Route path="movies" element={<PageMotion><LibraryPage type="movies" /></PageMotion>} />
             <Route path="shows" element={<PageMotion><LibraryPage type="shows" /></PageMotion>} />
+            <Route path="folders" element={<PageMotion><FoldersPage /></PageMotion>} />
             <Route path="music" element={<PageMotion><MusicPage /></PageMotion>} />
             <Route path="playlists" element={<PageMotion><PlaylistsPage /></PageMotion>} />
             <Route path="item/:id" element={<PageMotion><DetailPage /></PageMotion>} />

src/components/layout/AppHeader.tsx

@@ -33,6 +33,7 @@ const TOP_LEVEL_PATHS = new Set([
   '/',
   '/movies',
   '/shows',
+  '/folders',
   '/playlists',
   '/music',
   '/search',
@@ -44,6 +45,7 @@ function pageTitleFor(pathname: string): string {
   if (pathname === '/') return 'Home'
   if (pathname === '/movies') return 'Movies'
   if (pathname === '/shows') return 'TV Shows'
+  if (pathname === '/folders') return 'Folders'
   if (pathname === '/playlists') return 'Playlists'
   if (pathname === '/music') return 'Music'
   if (pathname === '/search') return 'Search'

src/components/layout/AppShell.tsx

@@ -16,6 +16,7 @@ import {
   Activity,
   Radio,
   Download,
+  Folders,
 } from '../../lib/icons'
 import type { AuthState } from '../../api/types'
 import AppHeader from './AppHeader'
@@ -54,6 +55,7 @@ const NAV_SECTIONS: NavSection[] = [
       { to: '/', icon: Home, label: 'Home' },
       { to: '/movies', icon: Film, label: 'Movies' },
       { to: '/shows', icon: Tv, label: 'Shows' },
+      { to: '/folders', icon: Folders, label: 'Folders' },
       { to: '/playlists', icon: Playlists, label: 'Playlists' },
       { to: '/live', icon: Radio, label: 'Live TV' },
       { to: '/requests', icon: Database, label: 'Requests' },

src/hooks/use-jellyfin.ts

@@ -98,6 +98,7 @@ export function useLibraryItems(
     limit?: number
     enabled?: boolean
     includePeople?: boolean
+    recursive?: boolean
   },
 ) {
   const api = useApi()
@@ -118,7 +119,7 @@ export function useLibraryItems(
         minCommunityRating: opts?.minCommunityRating,
         startIndex: opts?.startIndex,
         limit: opts?.limit || 100,
-        recursive: true,
+        recursive: opts?.recursive ?? true,
         fields: [
           'PrimaryImageAspectRatio',
           'Overview',

src/lib/device-profile.ts

@@ -56,9 +56,14 @@ async function canDecodeHdr(contentType: string, transferFunction: 'pq' | 'hlg'
 }
 
 function supportedVideoCodecs(): string[] {
-  const codecs: string[] = ['h264'] // Universally supported in MSE
-  if (canPlayInMse('video/mp4; codecs="hev1.1.6.L93.B0"') ||
-      canPlayInMse('video/mp4; codecs="hvc1.1.6.L93.B0"')) {
+  const codecs: string[] = ['h264']
+  // HEVC main profile level 5.1 - the spec ceiling for 4K consumer
+  // hardware. Bumping the probe to 5.1 makes 4K HEVC SDR/HDR content
+  // direct-play on Chromium + WebView2 when the OS has the HEVC codec
+  // installed. Older 3.0 probes rejected perfectly valid 4K rips and
+  // forced the server to transcode.
+  if (canPlayInMse('video/mp4; codecs="hev1.1.6.L153.B0"') ||
+      canPlayInMse('video/mp4; codecs="hvc1.1.6.L153.B0"')) {
     codecs.push('hevc')
   }
   if (canPlayInMse('video/mp4; codecs="vp09.00.10.08"')) {

src/lib/icons.ts

@@ -18,6 +18,8 @@ export {
   IconSettings as Settings,
   IconLogout as LogOut,
   IconLibrary as Library,
+  IconFolder as Folder,
+  IconFolders as Folders,
   IconCompass as Compass,
   IconFlame as Flame,
   IconFilter as Filter,

src/pages/FoldersPage.tsx

@@ -0,0 +1,135 @@
+import { useNavigate } from 'react-router-dom'
+import { useLibraries, useLibraryItems } from '../hooks/use-jellyfin'
+import { Folder } from '../lib/icons'
+import type { BaseItemDto } from '../api/types'
+
+export default function FoldersPage() {
+  const { data: libraries, isLoading } = useLibraries()
+  const navigate = useNavigate()
+  const userLibraries = (libraries || []).filter(l => l.CollectionType)
+
+  return (
+    <div className="px-7 pt-4 pb-12">
+      <header className="mb-7">
+        <div className="flex items-center gap-2 mb-1.5">
+          <span className="w-1 h-3.5 rounded-full bg-accent" />
+          <span className="text-[11px] font-semibold text-text-2 uppercase tracking-[0.14em]">Library</span>
+        </div>
+        <h1 className="text-3xl md:text-4xl font-bold font-display text-text-1 tracking-tight">
+          Folders
+        </h1>
+        <p className="text-text-3 text-[13px] mt-1.5 max-w-prose">
+          Browse libraries by folder. Each library section below shows the top-level folders Jellyfin scanned; click one to see only its items.
+        </p>
+      </header>
+
+      {isLoading ? (
+        <FoldersSkeleton />
+      ) : userLibraries.length === 0 ? (
+        <p className="text-text-3 text-[13px]">No libraries found.</p>
+      ) : (
+        <div className="space-y-10">
+          {userLibraries.map(library => (
+            <LibrarySection
+              key={library.Id}
+              library={library}
+              onOpen={id => navigate(`/item/${id}`)}
+            />
+          ))}
+        </div>
+      )}
+    </div>
+  )
+}
+
+function LibrarySection({
+  library,
+  onOpen,
+}: {
+  library: BaseItemDto
+  onOpen: (id: string) => void
+}) {
+  const { data, isLoading } = useLibraryItems(library.Id, {
+    recursive: false,
+    sortBy: ['SortName'],
+    limit: 50,
+  })
+
+  const subfolders = (data?.Items || []).filter(
+    (it: BaseItemDto) => it.Id && (it.Type === 'CollectionFolder' || it.IsFolder),
+  )
+
+  return (
+    <section>
+      <div className="flex items-baseline gap-3 mb-3">
+        <h2 className="text-xl font-semibold text-text-1 font-display tracking-tight">
+          {library.Name}
+        </h2>
+        <span className="text-[11.5px] text-text-4 tabular-nums">
+          {subfolders.length} {subfolders.length === 1 ? 'folder' : 'folders'}
+        </span>
+      </div>
+
+      {isLoading ? (
+        <FoldersSkeleton compact />
+      ) : subfolders.length === 0 ? (
+        <p className="text-text-3 text-[12.5px]">
+          No subfolders in this library. Use Movies / TV Shows in the sidebar to browse everything.
+        </p>
+      ) : (
+        <div className="grid grid-cols-2 sm:grid-cols-3 md:grid-cols-4 lg:grid-cols-5 xl:grid-cols-6 gap-3">
+          {subfolders.map(folder => (
+            <FolderCard
+              key={folder.Id}
+              name={folder.Name || 'Folder'}
+              count={folder.RecursiveItemCount ?? folder.ChildCount ?? 0}
+              onClick={() => onOpen(folder.Id!)}
+            />
+          ))}
+        </div>
+      )}
+    </section>
+  )
+}
+
+function FolderCard({
+  name,
+  count,
+  onClick,
+}: {
+  name: string
+  count: number
+  onClick: () => void
+}) {
+  return (
+    <button
+      onClick={onClick}
+      className="text-left rounded-xl border border-border bg-elevated/40 hover:border-accent hover:bg-elevated transition p-4 group focus-ring"
+    >
+      <div className="flex items-center justify-center w-10 h-10 rounded-lg bg-accent/15 text-accent mb-3 group-hover:bg-accent/25">
+        <Folder size={20} stroke={1.8} />
+      </div>
+      <h3 className="font-semibold text-text-1 truncate" title={name}>
+        {name}
+      </h3>
+      <p className="text-[11.5px] text-text-3 mt-1 tabular-nums">
+        {count.toLocaleString()} {count === 1 ? 'item' : 'items'}
+      </p>
+    </button>
+  )
+}
+
+function FoldersSkeleton({ compact = false }: { compact?: boolean }) {
+  const count = compact ? 4 : 8
+  return (
+    <div className="grid grid-cols-2 sm:grid-cols-3 md:grid-cols-4 lg:grid-cols-5 xl:grid-cols-6 gap-3">
+      {Array.from({ length: count }).map((_, i) => (
+        <div key={i} className="rounded-xl border border-border bg-elevated/40 p-4">
+          <div className="skeleton w-10 h-10 rounded-lg mb-3" />
+          <div className="skeleton h-3.5 w-3/4 rounded" />
+          <div className="skeleton h-2.5 w-1/2 rounded mt-2" />
+        </div>
+      ))}
+    </div>
+  )
+}