Generate AVIF images, fix result display

CHDataManagement/Generator/Results/GenerationResults.swift

@@ -70,7 +70,7 @@ final class GenerationResults: ObservableObject {
         let general = PageGenerationResults(itemId: id, delegate: self)
         self.general = general
         cache[id] = general
-        self.resultCount = 1
+        self.resultCount = 0
     }
 
     func makeResults(_ itemId: LocalizedItemId) -> PageGenerationResults {
@@ -98,6 +98,28 @@ final class GenerationResults: ObservableObject {
         return makeResults(itemId)
     }
 
+    func reset() {
+        update {
+            self.inaccessibleFiles = []
+            self.unparsableFiles = []
+            self.missingFiles = []
+            self.missingTags = []
+            self.missingPages = []
+            self.externalLinks = []
+            self.requiredFiles = []
+            self.imagesToGenerate = []
+            self.invalidCommands = []
+            self.invalidBlocks = []
+            self.warnings = []
+            self.unsavedOutputFiles = []
+            self.emptyPages = []
+            self.redirects = [:]
+        }
+        for result in cache.values {
+            result.reset()
+        }
+    }
+
     func recalculate() {
         let inaccessibleFiles = cache.values.map { $0.inaccessibleFiles }.union()
         update { self.inaccessibleFiles = inaccessibleFiles }