feat(mobile): mobile card view for clients + interests lists

Adds optional cardRender prop to <DataTable> that switches the layout
to a vertical card list below lg: while keeping the same TanStack
table instance powering both views (pagination, sort, selection).

New shared shell:
  - <ListCard>          rounded card with optional left status accent bar,
                        whole-card link to detail page, top-right actions
                        slot, and tactile hover/active states.
  - <ListCardAvatar>    40px brand-tinted circle (initials or domain icon).
  - <ListCardMeta>      inline icon + muted text segment.
  - deriveInitials()    shared helper that ignores numeric tokens (so
                        "Recovery Test 1777" -> "RT", not "R1").

Clients and interests pages now render mobile cards via cardRender
using this shell; desktop view (lg+) is unchanged. Interests cards
encode pipeline stage as a left-edge accent strip whose saturation
deepens with pipeline progression (open -> completed). Berths display
with an Anchor icon; null-berth interests fall back to a Compass +
"General interest" italic label. Hot leads get a discreet "Hot" pill.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/components/clients/client-card.tsx

@@ -0,0 +1,125 @@
+'use client';
+
+import { Archive, MoreHorizontal, Pencil } from 'lucide-react';
+
+import { Button } from '@/components/ui/button';
+import {
+  DropdownMenu,
+  DropdownMenuContent,
+  DropdownMenuItem,
+  DropdownMenuTrigger,
+} from '@/components/ui/dropdown-menu';
+import { TagBadge } from '@/components/shared/tag-badge';
+import {
+  ListCard,
+  ListCardAvatar,
+  ListCardMeta,
+  deriveInitials,
+} from '@/components/shared/list-card';
+import { getCountryName } from '@/lib/i18n/countries';
+import type { ClientRow } from './client-columns';
+
+const SOURCE_LABELS: Record<string, string> = {
+  website: 'Website',
+  manual: 'Manual',
+  referral: 'Referral',
+  broker: 'Broker',
+};
+
+interface ClientCardProps {
+  client: ClientRow;
+  portSlug: string;
+  onEdit: (client: ClientRow) => void;
+  onArchive: (client: ClientRow) => void;
+}
+
+export function ClientCard({ client, portSlug, onEdit, onArchive }: ClientCardProps) {
+  const primary = client.contacts?.find((c) => c.isPrimary);
+  const nationality = client.nationalityIso ? getCountryName(client.nationalityIso, 'en') : null;
+  const sourceLabel = client.source ? (SOURCE_LABELS[client.source] ?? client.source) : null;
+  const yachtCount = client.yachtCount ?? 0;
+  const companyCount = client.companyCount ?? 0;
+  const tags = client.tags ?? [];
+
+  const meta = [nationality, sourceLabel].filter(Boolean) as string[];
+  const counts: string[] = [];
+  if (yachtCount > 0) counts.push(`${yachtCount} ${yachtCount === 1 ? 'yacht' : 'yachts'}`);
+  if (companyCount > 0)
+    counts.push(`${companyCount} ${companyCount === 1 ? 'company' : 'companies'}`);
+
+  return (
+    <ListCard
+      href={`/${portSlug}/clients/${client.id}`}
+      ariaLabel={`Client ${client.fullName}`}
+      actions={
+        <DropdownMenu>
+          <DropdownMenuTrigger asChild>
+            <Button
+              variant="ghost"
+              size="icon"
+              className="h-9 w-9"
+              onClick={(e) => e.stopPropagation()}
+              aria-label={`Actions for ${client.fullName}`}
+            >
+              <MoreHorizontal className="h-4 w-4" />
+            </Button>
+          </DropdownMenuTrigger>
+          <DropdownMenuContent align="end">
+            <DropdownMenuItem onClick={() => onEdit(client)}>
+              <Pencil className="mr-2 h-3.5 w-3.5" />
+              Edit
+            </DropdownMenuItem>
+            <DropdownMenuItem className="text-destructive" onClick={() => onArchive(client)}>
+              <Archive className="mr-2 h-3.5 w-3.5" />
+              Archive
+            </DropdownMenuItem>
+          </DropdownMenuContent>
+        </DropdownMenu>
+      }
+    >
+      <div className="flex items-start gap-3">
+        <ListCardAvatar initials={deriveInitials(client.fullName)} />
+        <div className="min-w-0 flex-1">
+          <div className="flex items-start justify-between gap-2">
+            <h3 className="truncate text-base font-semibold tracking-tight text-foreground">
+              {client.fullName}
+            </h3>
+            <span aria-hidden className="block h-9 w-9 shrink-0" />
+          </div>
+
+          {primary ? (
+            <p className="truncate text-sm text-muted-foreground">{primary.value}</p>
+          ) : null}
+
+          {meta.length > 0 ? (
+            <div className="mt-0.5 flex flex-wrap items-center gap-x-1.5 text-xs text-muted-foreground">
+              {meta.map((m, i) => (
+                <span key={m} className="inline-flex items-center gap-1">
+                  {i > 0 ? <span aria-hidden>·</span> : null}
+                  <ListCardMeta>{m}</ListCardMeta>
+                </span>
+              ))}
+            </div>
+          ) : null}
+
+          {counts.length > 0 ? (
+            <p className="mt-0.5 text-xs text-muted-foreground">{counts.join(' · ')}</p>
+          ) : null}
+
+          {tags.length > 0 ? (
+            <div className="mt-2 flex flex-wrap gap-1">
+              {tags.slice(0, 2).map((tag) => (
+                <TagBadge key={tag.id} name={tag.name} color={tag.color} />
+              ))}
+              {tags.length > 2 ? (
+                <span className="inline-flex items-center rounded-full bg-secondary px-2 py-0.5 text-xs text-secondary-foreground">
+                  +{tags.length - 2}
+                </span>
+              ) : null}
+            </div>
+          ) : null}
+        </div>
+      </div>
+    </ListCard>
+  );
+}