validation: actually validate events

Check to see if id and/or signature are good

Changelog-Changed: Check note ids and signatures on every note
Signed-off-by: William Casarin <jb55@jb55.com>

damus/Views/EventView.swift

@@ -140,6 +140,7 @@ struct EventView: View {
             .padding([.leading], 2)
         }
         .contentShape(Rectangle())
+        .background(event_validity_color(event.validity))
         .id(event.id)
         .frame(minHeight: PFP_SIZE)
         .padding([.bottom], 4)
@@ -147,6 +148,19 @@ struct EventView: View {
     }
 }
 
+func event_validity_color(_ validation: ValidationResult) -> some View {
+    Group {
+        switch validation {
+        case .ok:
+            EmptyView()
+        case .bad_id:
+            Color.orange.opacity(0.4)
+        case .bad_sig:
+            Color.red.opacity(0.4)
+        }
+    }
+}
+
 extension View {
     func pubkey_context_menu(bech32_pubkey: String) -> some View {
         return self.contextMenu {