v0.1.0-X (vc=12): revert to NewPipeExtractor for working playback

Phase U (rustypipe Rust extractor) rolled back. Symptom: black screen
on play, root cause: rustypipe 0.11.4's JS deobfuscator can't parse
current YouTube player.js (YT changed the obfuscation pattern, no
upstream rustypipe release since June 2025). Switching clients
(Web → TV → Android/Ios) didn't help — the deobfuscator init fires
universally.

Kept in place for the future:
- rust/strawcore/ Cargo workspace + UniFFI scaffolding
- crafting-table runtime install (rustup + 4 Android targets +
  cargo-ndk + NDK r27c)
- The U-2..U-5 commits in history (re-runnable when rustypipe is
  fixed or we fork it).

Restored from commit 9550b207a (v0.1.0-T):
- NewPipe.init() in StrawApp.onCreate
- libs.newpipe.extractor + libs.squareup.okhttp deps
- NewPipeDownloader.kt + Thumbnails.kt
- ViewModels (Search/VideoDetail/Player/Channel/SubscriptionFeed) on
  NewPipeExtractor calls
- VideoDetailScreen Download dialog using NewPipe's StreamInfo

Future-direction memo: openclaw-workspace/memory/project_rustypipe_fork.md
— fork plan + revival path for the Rust extractor when we're ready
to maintain it.

Verified working in the Android emulator: dQw4w9WgXcQ plays, ExoPlayer
reports state=PLAYING(3), position advancing, video surface rendering.

rust/strawcore/src/stream.rs

@@ -129,14 +129,18 @@ pub async fn stream_info(url: String) -> Result<StreamInfo, StrawcoreError> {
     log::info!("strawcore::stream_info id={}", id);
     let rp = RustyPipe::new();
 
-    // rustypipe's default `player()` uses the Web client first. Those URLs
-    // come back signed against the Web fetch's session/UA — ExoPlayer can't
-    // replay them (404/403/black screen). Force the TV embedded + iOS
-    // clients, both of which return ungated direct-play URLs the way
-    // NewPipe's resolver does.
+    // rustypipe's default `player()` uses the Web client first, which
+    // returns signed URLs that need JS deobfuscation. Even the TV (TVHTML5)
+    // client signs URLs nowadays, so deobfuscation runs and currently
+    // fails ("could not extract sig fn name") because YT changed the
+    // obfuscation pattern after rustypipe 0.11.4's last cut.
+    //
+    // Android and iOS YT-app clients serve URLs UNSIGNED — no sig
+    // decryption needed, ExoPlayer plays them directly. This is the same
+    // path NewPipe uses for its mobile + iOS-embed strategies.
     let player = rp
         .query()
-        .player_from_clients(&id, &[ClientType::Tv, ClientType::Ios])
+        .player_from_clients(&id, &[ClientType::Android, ClientType::Ios])
         .await?;
     let details = &player.details;