timelineItem notes can be null (#8448)

Fixes #8447

Author: alexr00

src/github/graphql.ts

@@ -322,7 +322,7 @@ export interface LatestUpdatesResponse {
 			timelineItems: {
 				nodes: ({
 					createdAt: string;
-				} | LatestCommit | LatestReviewThread)[];
+				} | LatestCommit | LatestReviewThread | null)[];
 			}
 		}
 	}

src/github/issueModel.ts

@@ -450,13 +450,13 @@ export class IssueModel<TItem extends Issue = Issue> extends Disposable {
 				...(data.repository.pullRequest.comments.nodes.map(node => new Date(node.updatedAt))),
 				...(data.repository.pullRequest.comments.nodes.flatMap(node => node.reactions.nodes.map(reaction => new Date(reaction.createdAt)))),
 				...(data.repository.pullRequest.timelineItems.nodes.map(node => {
-					const latestCommit = node as Partial<LatestCommit>;
-					if (latestCommit.commit?.committedDate) {
+					const latestCommit = node as (Partial<LatestCommit> | null);
+					if (latestCommit?.commit?.committedDate) {
 						return new Date(latestCommit.commit.committedDate);
 					}
-					const latestReviewThread = node as Partial<LatestReviewThread>;
-					if ((latestReviewThread.comments?.nodes.length ?? 0) > 0) {
-						return new Date(latestReviewThread.comments!.nodes[0].createdAt);
+					const latestReviewThread = node as (Partial<LatestReviewThread> | null);
+					if ((latestReviewThread?.comments?.nodes.length ?? 0) > 0) {
+						return new Date(latestReviewThread!.comments!.nodes[0].createdAt);
 					}
 					return new Date((node as { createdAt: string }).createdAt);
 				}))