fix: single thread for entire signal lifecycle — runtime never dropped (libcrypto TLS fix)

crates/wzp-android/src/jni_bridge.rs

@@ -413,24 +413,12 @@ pub unsafe extern "system" fn Java_com_wzp_engine_SignalManager_nativeSignalConn
     let relay: String = env.get_string(&relay_j).map(|s| s.into()).unwrap_or_default();
     let seed: String = env.get_string(&seed_j).map(|s| s.into()).unwrap_or_default();
 
-    // start() connects + registers synchronously (blocks briefly).
-    // Then we spawn run() on a thread for the recv loop.
+    // start() spawns an internal thread (connect+register+recv, ONE runtime, never dropped).
+    // Blocks up to 10s waiting for the connect+register to complete.
     match crate::signal_mgr::SignalManager::start(&relay, &seed) {
         Ok(mgr) => {
             let handle = Box::new(SignalHandle { mgr });
-            let raw = Box::into_raw(handle);
-
-            // Spawn recv loop on a small thread (no crypto init, just recv)
-            let recv_ref: &'static SignalHandle = unsafe { &*raw };
-            std::thread::Builder::new()
-                .name("wzp-signal-recv".into())
-                .stack_size(2 * 1024 * 1024) // 2MB is enough for recv-only
-                .spawn(move || {
-                    recv_ref.mgr.run();
-                })
-                .ok();
-
-            raw as jlong
+            Box::into_raw(handle) as jlong
         }
         Err(e) => {
             error!("signal connect failed: {e}");