threads: attempt to fix state jankiness

Changelog-Fixed: Fix some more thread jankiness

damus/Views/ThreadView.swift

@@ -9,19 +9,21 @@ import SwiftUI
 
 struct ThreadView: View {
     let state: DamusState
-    
     @ObservedObject var thread: ThreadModel
+    
+    var body: some View {
+        ThreadView_(state: state, thread: thread, zaps: state.events.get_cache_data(thread.event.id).zaps_model)
+    }
+}
+
+struct ThreadView_: View {
+    let state: DamusState
+    
+    let thread: ThreadModel
     @ObservedObject var zaps: ZapsDataModel
     
     @Environment(\.dismiss) var dismiss
     
-    init(state: DamusState, thread: ThreadModel) {
-        self.state = state
-        self._thread = ObservedObject(wrappedValue: thread)
-        let zaps = state.events.get_cache_data(thread.event.id).zaps_model
-        self._zaps = ObservedObject(wrappedValue: zaps)
-    }
-    
     var parent_events: [NostrEvent] {
         state.events.parent_events(event: thread.event)
     }