fix(mobile): scene-list scroll perf + native phone-side fpoxxx resolver

(1) Scroll jank/device load on long scene lists (report 5b7ca1e1): SceneTile is now React.memo'd so typing in search no longer re-renders every mounted tile, and sceneGridProps bounds the render window (windowSize 7 etc.) — required because removeClippedSubviews stays false to avoid thumbnail blanking. Applies to all scene grids. (2) fpoxxx played an ad instead of the video via the WebView fallback (reports f79beefb/cfa207c7). fpoxxx is KVS with an IP-bound + session-bound get_file token (cross-IP 403 confirmed), so it must resolve phone-side: new fpoxxxResolver fetches the page + follows get_file on the device (KVS real_url port for the function/0 case), wired into SceneDetailScreen like sxyprn/eporner. Verified from a residential IP: get_file -> CDN returns 206 video/mp4.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

mobile/src/changelog.ts

@@ -16,6 +16,14 @@ export type ChangelogEntry = {
 };
 
 export const CHANGELOG: ChangelogEntry[] = [
+  {
+    id: '2026-06-19',
+    date: 'June 2026',
+    items: [
+      'Smoother scrolling on long scene lists — no more lag or phone slowdown.',
+      'fpo.xxx scenes now play the actual video instead of an ad.',
+    ],
+  },
   {
     id: '2026-06-16',
     date: 'June 2026',

mobile/src/components/SceneTile.tsx

@@ -49,7 +49,7 @@ interface Props {
   onLongPress?: () => void;
 }
 
-export function SceneTile({ scene, secondLine = 'studio', seenSince, onLongPress }: Props) {
+function SceneTileBase({ scene, secondLine = 'studio', seenSince, onLongPress }: Props) {
   const navigation =
     useNavigation<NativeStackNavigationProp<RootStackParamList>>();
   const { isSelecting, pendingDuplicate, openActions, pickDuplicateTarget } = useSceneActions();
@@ -155,6 +155,12 @@ export function SceneTile({ scene, secondLine = 'studio', seenSince, onLongPress
   );
 }
 
+// Memoizowany — bez tego każda zmiana stanu parenta (np. pisanie w search-boxie na
+// ScenesScreen) re-renderuje WSZYSTKIE zamontowane kafelki → jank klawiatury i scrolla
+// (bug-report 5b7ca1e1). Props per item są stabilne (scene z react-query), więc shallow
+// compare wystarcza.
+export const SceneTile = React.memo(SceneTileBase);
+
 const styles = StyleSheet.create({
   tile: { flex: 1, marginBottom: 14 },
   thumbWrap: {
@@ -254,5 +260,14 @@ export function sceneGridProps(cols: number) {
     key: `scenegrid-${cols}`,
     numColumns: cols,
     columnWrapperStyle: cols > 1 ? { gap: 10 } : undefined,
+    // Perf (bug-report 5b7ca1e1): removeClippedSubviews zostaje false (inaczej expo-image
+    // blankuje miniaturki po scrollu), więc okno renderowania ograniczamy ręcznie —
+    // bez tego długa lista trzyma setki kafelków z obrazami → jank + obciążenie telefonu.
+    // windowSize 7 ≈ ~3 ekrany w pamięci. Dotyczy wszystkich siatek scen.
+    removeClippedSubviews: false,
+    windowSize: 7,
+    maxToRenderPerBatch: 8,
+    initialNumToRender: 8,
+    updateCellsBatchingPeriod: 50,
   };
 }

mobile/src/lib/fpoxxxResolver.ts

@@ -0,0 +1,148 @@
+/**
+ * Mobile-side fpo.xxx (fpoxxx) resolver — KVS (kt_player) phone-side.
+ *
+ * fpoxxx to KVS: flashvars `video_url` (czasem `function/0/...` zaszyfrowane, czasem już
+ * plain `.../get_file/...`) + `license_code`. get_file 302-redirectuje na CDN
+ * (videosN.fpo.xxx/remote_control.php) z `acctoken` BOUND DO IP fetchera + SESSION-bound
+ * (audit 2026-06-19: acctoken zawierał IP VPS, cross-IP = 403). Backend resolwuje z VPS →
+ * telefon dostaje URL bound do IP VPS → 403. Dawniej fallback = WebView, ale ad-heavy
+ * strona wstrzykuje VAST preroll → WebView łapie REKLAMĘ zamiast wideo (bug-report
+ * f79beefb / cfa207c7).
+ *
+ * Fix: telefon sam pobiera stronę (phone IP + ta sama sesja co get_file), deobfuskuje
+ * KVS i follow 302 → finalny CDN URL bound do telefonu → gra direct, bez WebView/reklam.
+ * Port deobfuskacji z app/extractors/tubes/_kvs.py (real_url/_license_token, algo zgodny
+ * z yt-dlp KVS). 302-follow reużyty z getfileResolver (resolveGetFile).
+ */
+import { resolveGetFile } from './getfileResolver';
+import type { StreamLink } from '../types';
+
+const UA =
+  'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/140.0.0.0 Safari/537.36';
+
+const _LICENSE_RE = /license_code\s*:\s*['"](\$[^'"]+)['"]/i;
+const _URL_RE =
+  /(video(?:_alt)?_url\d*)\s*:\s*['"](function\/0\/[^'"]+|https?:\/\/[^'"]*?\/get_file\/[^'"]*)['"]/gi;
+const _TEXT_RE = /(video(?:_alt)?_url\d*)_text\s*:\s*['"]([^'"]*)['"]/gi;
+
+const _HASH_LEN = 32;
+
+/** Port _license_token z _kvs.py (algo KVS / yt-dlp). */
+function licenseToken(licenseCode: string): number[] {
+  const lc = licenseCode.replace(/\$/g, '');
+  const values = [...lc].map((c) => parseInt(c, 10));
+  let mod = lc.replace(/0/g, '1');
+  const center = Math.floor(mod.length / 2);
+  const left = parseInt(mod.slice(0, center + 1), 10);
+  const right = parseInt(mod.slice(center), 10);
+  mod = String(4 * Math.abs(left - right)).slice(0, center + 1);
+  const out: number[] = [];
+  for (let index = 0; index < mod.length; index++) {
+    const current = parseInt(mod[index], 10);
+    for (let offset = 0; offset < 4; offset++) {
+      out.push(((values[index + offset] ?? 0) + current) % 10);
+    }
+  }
+  return out;
+}
+
+/** Port real_url z _kvs.py — permutuje pierwsze 32 znaki hash-segmentu. Plain get_file
+ *  (bez `function/0/`) zwraca bez zmian. */
+function realUrl(videoUrl: string, licenseCode: string): string {
+  const PREFIX = 'function/0/';
+  if (!videoUrl.startsWith(PREFIX)) return videoUrl;
+  let u: URL;
+  try {
+    u = new URL(videoUrl.slice(PREFIX.length));
+  } catch {
+    return videoUrl;
+  }
+  const lt = licenseToken(licenseCode);
+  if (lt.length < _HASH_LEN) return videoUrl;
+  const parts = u.pathname.split('/');
+  if (parts.length <= 3) return videoUrl;
+  const seg = parts[3];
+  const h = seg.slice(0, _HASH_LEN);
+  if (h.length < _HASH_LEN) return videoUrl;
+  const idx = Array.from({ length: _HASH_LEN }, (_, i) => i);
+  let acc = 0;
+  for (let src = _HASH_LEN - 1; src >= 0; src--) {
+    acc += lt[src];
+    const dest = (src + acc) % _HASH_LEN;
+    [idx[src], idx[dest]] = [idx[dest], idx[src]];
+  }
+  let permuted = '';
+  for (let i = 0; i < _HASH_LEN; i++) permuted += h[idx[i]];
+  parts[3] = permuted + seg.slice(_HASH_LEN);
+  u.pathname = parts.join('/');
+  return u.toString();
+}
+
+function qualityRank(label: string | null | undefined): number {
+  if (!label) return -1;
+  const m = /(\d{3,4})\s*p/i.exec(label);
+  return m ? parseInt(m[1], 10) : -1;
+}
+
+/**
+ * Pobiera fpo.xxx stronę NA TELEFONIE → deobfuskuje KVS → follow get_file 302 → mp4
+ * StreamLink-i (phone-IP-bound, grają direct). Zwraca [] gdy brak (caller spada na
+ * backend/WebView). Mirror resolve_kvs z _kvs.py.
+ */
+export async function resolveFpoxxxPage(pageUrl: string): Promise<StreamLink[]> {
+  let html: string;
+  try {
+    const r = await fetch(pageUrl, { headers: { 'User-Agent': UA, Accept: 'text/html' } });
+    if (!r.ok) return [];
+    html = await r.text();
+  } catch {
+    return [];
+  }
+  const licm = _LICENSE_RE.exec(html);
+  if (!licm) return [];
+  const licenseCode = licm[1];
+
+  // jakości po `<var>_text`
+  const qualityByVar: Record<string, string> = {};
+  let tm: RegExpExecArray | null;
+  _TEXT_RE.lastIndex = 0;
+  while ((tm = _TEXT_RE.exec(html)) !== null) {
+    qualityByVar[tm[1].toLowerCase()] = tm[2].trim();
+  }
+
+  let origin: string;
+  try {
+    origin = new URL(pageUrl).origin;
+  } catch {
+    origin = 'https://www.fpo.xxx';
+  }
+  const referer = origin + '/';
+
+  const seen = new Set<string>();
+  const links: StreamLink[] = [];
+  let fails = 0;
+  let um: RegExpExecArray | null;
+  _URL_RE.lastIndex = 0;
+  while ((um = _URL_RE.exec(html)) !== null) {
+    const varName = um[1].toLowerCase();
+    const decoded = realUrl(um[2], licenseCode);
+    if (seen.has(decoded)) continue;
+    seen.add(decoded);
+    const final = await resolveGetFile(decoded, referer);
+    if (!final) {
+      fails += 1;
+      if (fails >= 2 && links.length === 0) break; // martwa scena — nie czekaj dalej
+      continue;
+    }
+    links.push({
+      stream_url: final,
+      direct_url: final,
+      headers: { Referer: referer, 'User-Agent': UA },
+      quality: qualityByVar[varName] || null,
+      type: 'mp4',
+    });
+  }
+
+  links.sort((a, b) => qualityRank(b.quality) - qualityRank(a.quality));
+  return links;
+}

mobile/src/screens/SceneDetailScreen.tsx

@@ -24,6 +24,7 @@ import { isGetFileUrl, resolveGetFilePage } from '../lib/getfileResolver';
 import { resolvePornxpPage } from '../lib/pornxpResolver';
 import { resolveSxyprnPage } from '../lib/sxyprnResolver';
 import { resolveEpornerPage } from '../lib/epornerResolver';
+import { resolveFpoxxxPage } from '../lib/fpoxxxResolver';
 import type { RootStackParamList } from '../navigation';
 import { theme } from '../theme';
 import type { PlaybackSource, SceneOut, StreamLink } from '../types';
@@ -603,7 +604,9 @@ function PlaybackButton({
         ? resolveSxyprnPage
         : source.origin === 'tube:epornercom'
           ? resolveEpornerPage
-          : null;
+          : source.origin === 'tube:fpoxxx'
+            ? resolveFpoxxxPage
+            : null;
     if (phoneResolver) {
       setResolving(true);
       try {

mobile/src/screens/ScenesScreen.tsx

@@ -208,9 +208,8 @@ export function ScenesScreen() {
         {...sceneGridProps(gridColumns)}
         data={items}
         keyExtractor={(s) => s.id}
-        // Android removeClippedSubviews=true (default) blankuje miniaturki po scrollu —
-        // expo-image nie re-renderuje odpiętych subview. Bug-report "znikają miniaturki".
-        removeClippedSubviews={false}
+        // removeClippedSubviews + okno renderowania (windowSize itd.) idą z sceneGridProps
+        // — patrz SceneTile. Perf bug-report 5b7ca1e1 (jank/obciążenie przy długim scrollu).
         renderItem={({ item }) => <SceneTile scene={item} />}
         ListHeaderComponent={!debouncedQ && activeCount === 0 ? <ContinueWatchingRail /> : null}
         refreshing={isRefetching}