Expect historyEntry.adapter as null

Older history entries from gsettings might not yet have a adapter
associated.
This properly types this and fixes related null checks missing.

src/history.ts

@@ -25,10 +25,10 @@ class HistoryEntry {
     /** Unique identifier, concat of timestamp and name */
     id: string;
     /** Basename of URI */
-    name: string;
+    name: string | null; // This can be null when an entry from an older version is mapped from settings
     path: string | null = null;
     source: SourceInfo;
-    adapter: AdapterInfo = {
+    adapter: AdapterInfo | null = { // This can be null when an entry from an older version is mapped from settings
         id: null,
         type: null,
     };

src/historyMenuElements.ts

@@ -137,7 +137,7 @@ const HistoryElement = GObject.registerClass({
         this.menu.addMenuItem(copyToFavorites);
 
         // Static URLs can't block images (yet?)
-        if (this.historyEntry.adapter.type !== 5) {
+        if (this.historyEntry.adapter?.type !== 5) {
             const blockImage = new PopupMenu.PopupMenuItem('Add To Blocklist');
             blockImage.connect('activate', () => {
                 this._addToBlocklist(this.historyEntry);
@@ -185,7 +185,7 @@ const HistoryElement = GObject.registerClass({
     }
 
     private _addToBlocklist(entry: HistoryModule.HistoryEntry) {
-        if (!entry.adapter.id || entry.adapter.id === '-1' || !entry.name) {
+        if (!entry.adapter?.id || entry.adapter.id === '-1' || !entry.name) {
             this._logger.error('Image entry is missing information');
             return;
         }

src/wallpaperController.ts

@@ -483,8 +483,10 @@ class WallpaperController {
                 const fetchPromiseArray: Promise<HistoryModule.HistoryEntry>[] = [];
 
                 for (const element of array) {
-                    element.adapter.id = imageAdapters[index].id;
-                    element.adapter.type = imageAdapters[index].type;
+                    element.adapter = {
+                        id: imageAdapters[index].id,
+                        type: imageAdapters[index].type,
+                    };
 
                     this._logger.info(`Requesting image: ${element.source.imageDownloadUrl}`);
                     fetchPromiseArray.push(imageAdapters[index].adapter.fetchFile(element));