fix(ui+alerts+email): prod walkthrough batch

- proxy/banner: interest-berth-status-banner used the interest_berths
  junction id for /api/v1/berths/{id}/active-interests (404 on every
  interest with a sold/under-offer berth). Add berthId to BerthRow and use
  it for both the active-interests query and the BerthOccupancyChip.
- scroll-area: override Radix viewport `display:table` (`[&>div]:!block`) so
  content respects the viewport width — fixes notification alert cards
  overflowing past the popover. No horizontal-scroll ScrollArea in the app.
- alert-card: drop the raw `interest.stale` rule key from the footer
  (plaintext only; the title already conveys the alert).
- alert-rules (interest.stale): add a createdAt >14d floor so a bulk import
  that backdates dateLastContact doesn't instantly flag every migrated
  interest as stale and flood the alert rail. 14-day clock starts no earlier
  than when the interest entered this system.
- env: allow EMAIL_REDIRECT_TO in production behind an explicit
  ALLOW_PROD_EMAIL_REDIRECT=true opt-in (beta: route all outbound mail to
  the operator inbox; default still refuses the footgun).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/components/alerts/alert-card.tsx

@@ -59,8 +59,6 @@ export function AlertCard({ alert, readOnly = false }: AlertCardProps) {
         ) : null}
         <div className="mt-1 flex items-center gap-2 text-xs text-muted-foreground">
           <span>{fired}</span>
-          <span aria-hidden>·</span>
-          <span className="font-mono text-xs">{alert.ruleId}</span>
         </div>
       </div>
       {!readOnly ? (