postbox: try flushing events every second

relying on network activity for flushing is not reliable and is causing
delays in zapping

damus/ContentView.swift

@@ -80,6 +80,9 @@ struct ContentView: View {
     
     @Environment(\.colorScheme) var colorScheme
     
+    // connect retry timer
+    let timer = Timer.publish(every: 1, on: .main, in: .common).autoconnect()
+    
     var mystery: some View {
         Text("Are you lost?", comment: "Text asking the user if they are lost in the app.")
         .id("what")
@@ -347,6 +350,9 @@ struct ContentView: View {
             let action = notif.object as! PostAction
             self.active_sheet = .post(action)
         }
+        .onReceive(timer) { n in
+            self.damus_state?.postbox.try_flushing_events()
+        }
         .onReceive(handle_notify(.deleted_account)) { notif in
             self.is_deleted_account = true
         }

damus/Util/PostBox.swift

@@ -93,8 +93,6 @@ class PostBox {
     }
     
     func handle_event(relay_id: String, _ ev: NostrConnectionEvent) {
-        try_flushing_events()
-        
         guard case .nostr_event(let resp) = ev else {
             return
         }