fix(player): hide ad-heavy WebView behind opaque cover until stream scraped

User bug: opening a WebView-fallback scene (yespornvip etc.) shows the host's
ad-heavy page while INJECTED_JS auto-plays + scrapes the stream url in the
background. User sees ads instead of a loading state.

Render an opaque cover (theme.bg + spinner "Loading video…") over the WebView
while !extractedUrl. The WebView is still laid out and painted underneath, so
media keeps playing (autoplay via mediaPlaybackRequiresUserAction=false) and the
performance-scan picks up the CDN url — but the user only ever sees a loading
screen, then the native player. Applies to every WebView-fallback host.

Safety: if no stream is scraped within 15s (host needs a real tap to start),
reveal the WebView so the user can interact manually — no worse than before.

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

mobile/src/screens/PlayerScreen.tsx

@@ -988,6 +988,17 @@ function EmbedWebViewPlayer({ params }: { params: RouteParams }) {
   const [resolveError, setResolveError] = React.useState<string | null>(null);
   const [skipResolve, setSkipResolve] = React.useState(false);
   const [resolveAttempted, setResolveAttempted] = React.useState(false);
+  // Anti-ads: trzymamy nieprzezroczysty cover NA WebView dopóki INJECTED_JS nie
+  // wyciągnie URL — user nie widzi ad-heavy strony hostera (bug yespornvip "otwiera
+  // reklamy" 2026-05-31). WebView gra pod spodem (jest malowany, media leci, scrape
+  // łapie CDN). Jeśli po REVEAL_AFTER_MS autoplay nie zaskoczył (host wymaga gestu) —
+  // odsłaniamy WebView żeby user mógł ręcznie tapnąć play (graceful fallback).
+  const [revealEmbed, setRevealEmbed] = React.useState(false);
+  React.useEffect(() => {
+    if (extractedUrl) return;
+    const t = setTimeout(() => setRevealEmbed(true), 15000);
+    return () => clearTimeout(t);
+  }, [extractedUrl]);
 
   // Stage 0.8: mobile-side hoster resolvery. Mobile IP usera unika Cloudflare
   // Turnstile / CAPTCHA gate który blokuje Hetzner VPS — embed page renderuje
@@ -1206,6 +1217,12 @@ function EmbedWebViewPlayer({ params }: { params: RouteParams }) {
           </View>
         )}
       />
+      {!extractedUrl && !revealEmbed && (
+        <View style={styles.coverOverlay}>
+          <ActivityIndicator color={theme.fg} size="large" />
+          <Text style={styles.overlayText}>Loading video…</Text>
+        </View>
+      )}
       {extractedUrl && (
         <Pressable
           style={styles.extractBanner}
@@ -1241,6 +1258,20 @@ const styles = StyleSheet.create({
     backgroundColor: 'rgba(0,0,0,0.6)',
     paddingHorizontal: 32,
   },
+  // Nieprzezroczysty cover na WebView — ukrywa ad-heavy stronę hostera podczas gdy
+  // INJECTED_JS auto-play + scrape działają pod spodem. Solidne tło (nie alpha) =
+  // zero podglądu reklam.
+  coverOverlay: {
+    position: 'absolute',
+    top: 0,
+    left: 0,
+    right: 0,
+    bottom: 0,
+    alignItems: 'center',
+    justifyContent: 'center',
+    backgroundColor: theme.bg,
+    paddingHorizontal: 32,
+  },
   overlayText: { color: theme.fg, marginTop: 12, fontSize: 13, textAlign: 'center' },
   errorTitle: { color: theme.bad, fontSize: 18, fontWeight: '700', marginBottom: 8 },
   errorBody: { color: theme.fg, fontSize: 14, marginBottom: 16, textAlign: 'center' },