Generate AVIF images, fix result display

CHDataManagement/Model/Content+Generation.swift

@@ -4,6 +4,7 @@ extension Content {
 
     func generateWebsiteInAllLanguages() {
         performGenerationIfIdle {
+            self.results.reset()
             self.generatePagesInternal()
             self.generatePostFeedPagesInternal()
             self.generateTagPagesInternal()
@@ -80,8 +81,6 @@ extension Content {
             }
             results.failed(image: image)
         }
-
-        imageGenerator.writeAvifCommandScript()
     }
 
     func generateAllPages() {

CHDataManagement/Model/Content.swift

@@ -181,7 +181,9 @@ final class Content: ObservableObject {
     private(set) var lastModification: Date = .now
 
     func update(saveState: SaveState) {
-        self.saveState = saveState
+        DispatchQueue.main.async {
+            self.saveState = saveState
+        }
     }
 
     func setModificationTimestamp() {