Add a Monday-morning weekly recap briefing

No US session closes into Monday KST, so Mondays (default 07:00, cron
in the daemon with restart catch-up) now publish a weekly review built
entirely from stored data: the quotes table collapsed into week-over-
week changes and the week's daily briefing headlines as the narrative.
The recap is a BriefingResult kind="weekly" reusing MarketPayload, so
the store, verification pass, all delivery channels (Blogger title
"미국 주간 리뷰 <monday>") and the dashboard (주간 리뷰 badge) work
unchanged. Manual runs via `run-once --weekly [--date <monday>]`.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

dashboard/web/styles.css

@@ -205,6 +205,7 @@ button[aria-pressed="true"] { background: var(--grid); }
 .badge-ok { background: var(--badge-ok-bg); color: var(--badge-ok-ink); }
 .badge-warn { background: var(--badge-warn-bg); color: var(--badge-warn-ink); }
 .badge-error { background: var(--badge-err-bg); color: var(--badge-err-ink); }
+.badge-week { border: 1px solid var(--series-1); color: var(--series-1); background: transparent; }
 
 /* ------------------------------------------------------------------ summary card */
 .summary-card {