fix(inbox): add key to IssueDetail to reset state on issue switch

Without a key, React reuses the IssueDetail component instance when
switching between inbox items. This causes stale internal state
(e.g. TaskRunHistory tasks) from the previous issue to persist,
showing execution history from a different issue.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

apps/web/app/(dashboard)/inbox/page.tsx

@@ -387,6 +387,7 @@ export default function InboxPage() {
       <div className="flex flex-col min-h-0 h-full">
         {selected?.issue_id ? (
           <IssueDetail
+            key={selected.issue_id}
             issueId={selected.issue_id}
             defaultSidebarOpen={false}
             layoutId="multica_inbox_issue_detail_layout"