Add a delete button on the session detail view

Same confirm-dialog delete UX as the sessions table, next to Replay in
the header. Deleting redirects back to /sessions since the session no
longer exists.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01WzyfRyA7h5rs5SCAahLAWd

app/(app)/sessions/[id]/page.tsx

@@ -7,6 +7,7 @@ import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card";
 import { SessionTimelineChart } from "@/components/sessions/SessionTimelineChart";
 import { SessionTitleEditor } from "@/components/sessions/SessionTitleEditor";
 import { SessionDescriptionEditor } from "@/components/sessions/SessionDescriptionEditor";
+import { SessionDeleteButton } from "@/components/sessions/SessionDeleteButton";
 import { STATUS_VARIANT } from "@/components/sessions/session-status";
 import { getSessionDetail, getSessionName } from "@/lib/db/queries/sessions";
 import { getSessionTimeline } from "@/lib/db/queries/stats";
@@ -65,6 +66,7 @@ export default async function SessionDetailPage({ params }: { params: Promise<{
               </Link>
             </Button>
           )}
+          <SessionDeleteButton sessionId={detail.session.id} sessionName={detail.session.name} />
         </div>
       </div>