fix: Rebind Iroh endpoint on room join to fix restart bug

src/core/mod.rs

@@ -44,6 +44,7 @@ impl CoreController {
 }
 
 struct ActiveSession {
+    endpoint: Endpoint,
     router: Router,
     room_state: Arc<IrohGossipState>,
     capture_thread: std::thread::JoinHandle<()>,
@@ -88,15 +89,6 @@ async fn run_core_loop(
     let memory_lookup = iroh::address_lookup::memory::MemoryLookup::new();
     let secret_key = iroh::SecretKey::generate();
 
-    // Bind local endpoint on a random port
-    let endpoint = Endpoint::builder(presets::N0)
-        .secret_key(secret_key)
-        .address_lookup(memory_lookup.clone())
-        .bind()
-        .await?;
-
-    endpoint.online().await;
-
     let audio_backend = Arc::new(PipeWireBackend::new());
 
     let is_muted = Arc::new(AtomicBool::new(false));
@@ -119,6 +111,19 @@ async fn run_core_loop(
                     session.shutdown(audio_backend.clone()).await;
                 }
 
+                let endpoint = match Endpoint::builder(presets::N0)
+                    .secret_key(secret_key.clone())
+                    .address_lookup(memory_lookup.clone())
+                    .bind()
+                    .await {
+                        Ok(ep) => ep,
+                        Err(e) => {
+                            let _ = ui_tx.send(UiEvent::Error(format!("Failed to bind endpoint: {}", e))).await;
+                            continue;
+                        }
+                    };
+                endpoint.online().await;
+
                 // Determine target ticket
                 let ticket_str = if ticket.trim().is_empty() || ticket == "create" {
                     let topic_id: [u8; 32] = rand::random();
@@ -370,6 +375,7 @@ async fn run_core_loop(
                 });
 
                 let session = ActiveSession {
+                    endpoint: endpoint.clone(),
                     router,
                     room_state: room_state.clone(),
                     capture_thread,
@@ -399,7 +405,7 @@ async fn run_core_loop(
                     let self_state = PeerState {
                         name: current_name.clone(),
                         is_muted: new_state,
-                        addr: endpoint.addr(),
+                        addr: session.endpoint.addr(),
                     };
                     let _ = session.room_state.update_self_state(self_state).await;
                 }