Add pre-commit checks to the copilot instructions (#7462)

Author: alexr00

.github/copilot-instructions.md

@@ -16,6 +16,7 @@
 
 ## Pull Request Guidelines
 - Never touch the yarn.lock file.
+- Run `yarn run lint` and also `npm run hygiene` and fix any errors or warnings before submitting a PR.
 
 ---
 _Last updated: 2025-06-20_

webviews/common/context.tsx

@@ -293,7 +293,10 @@ export class PRContext {
 
 	public openSessionLog = (link: SessionLinkInfo) => this.postMessage({ command: 'pr.open-session-log', args: { link } });
 
-	public openCommitChanges = (commitSha: string) => this.postMessage({ command: 'pr.openCommitChanges', args: { commitSha } as OpenCommitChangesArgs });
+	public openCommitChanges = (commitSha: string) => {
+		const args: OpenCommitChangesArgs = { commitSha };
+		return this.postMessage({ command: 'pr.openCommitChanges', args });
+	};
 
 	setPR = (pr: PullRequest | undefined) => {
 		this.pr = pr;