Use let-else in some more places

cove/src/ui.rs

@@ -181,9 +181,8 @@ impl Ui {
             }
 
             // Handle events (in batches)
-            let mut event = match event_rx.recv().await {
-                Some(event) => event,
-                None => return Ok(()),
+            let Some(mut event) = event_rx.recv().await else {
+                return Ok(());
             };
             let end_time = Instant::now() + EVENT_PROCESSING_TIME;
             loop {

cove/src/ui/euph/room.rs

@@ -532,10 +532,7 @@ impl EuphRoom {
     }
 
     pub async fn handle_event(&mut self, event: Event) -> bool {
-        let room = match &self.room {
-            None => return false,
-            Some(room) => room,
-        };
+        let Some(room) = &self.room else { return false };
 
         if event.config().name != room.instance().config().name {
             // If we allowed names other than the current one, old instances