feat(03-01): add KpiCardMobile, NeedsAttentionStrip, WorkerStatusRow components

- KpiCardMobile: phone-sized KPI card with label/value/caption; tone='attention' adds destructive left border
- NeedsAttentionStrip: horizontal-scroll strip of compact attention cards; renders null when items=[]
- WorkerStatusRow: 3-cell status row with emerald/amber/destructive status dots, each linking to desktop admin
- All three are pure presentational client components; no fetch, no recharts, no new state libraries

components/mobile/KpiCardMobile.tsx

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+'use client';
+
+/* KpiCardMobile — phase 03 (DASH-01).
+ *
+ * Phone-sized KPI card for the 2×2 dashboard grid. Renders a label,
+ * a large numeric value, and an optional caption. tone="attention"
+ * adds a left-edge destructive border for SLA breaches > 0.
+ *
+ * Pure presentational — no fetch, no state. Parent provides values. */
+
+import { Card, CardContent } from '@/components/ui/card';
+import { cn } from '@/lib/utils';
+
+export type KpiTone = 'default' | 'attention';
+
+interface KpiCardMobileProps {
+  label: string;
+  value: number | string;
+  caption?: string;
+  tone?: KpiTone;
+}
+
+const TONE_BORDER: Record<KpiTone, string> = {
+  default: 'border-l-transparent',
+  attention: 'border-l-destructive',
+};
+
+export function KpiCardMobile({ label, value, caption, tone = 'default' }: KpiCardMobileProps) {
+  const display = typeof value === 'number' ? value.toLocaleString() : value;
+  return (
+    <Card className={cn('h-full border-l-2', TONE_BORDER[tone])}>
+      <CardContent className="p-4 flex flex-col gap-1">
+        <p className="text-[11px] font-semibold text-muted-foreground uppercase tracking-wider">{label}</p>
+        <p className="text-3xl font-bold tabular-nums">{display}</p>
+        {caption && <p className="text-xs text-muted-foreground">{caption}</p>}
+      </CardContent>
+    </Card>
+  );
+}

components/mobile/NeedsAttentionStrip.tsx

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+'use client';
+
+/* NeedsAttentionStrip — phase 03 (DASH-02).
+ *
+ * Horizontal-scroll strip of compact attention cards. Each card shows a
+ * count + label and is a next/link to the destination view. The strip
+ * uses native horizontal overflow with snap-x for momentum scroll on
+ * iOS/Android. Renders nothing when items=[]. */
+
+import Link from 'next/link';
+import { AlertTriangle, ChevronRight } from 'lucide-react';
+
+export interface NeedsAttentionItem {
+  id: string;
+  label: string;
+  count: number;
+  href: string;
+}
+
+interface NeedsAttentionStripProps {
+  items: NeedsAttentionItem[];
+}
+
+export function NeedsAttentionStrip({ items }: NeedsAttentionStripProps) {
+  if (items.length === 0) return null;
+  return (
+    <div>
+      <p className="text-xs font-semibold text-muted-foreground uppercase tracking-wider mb-2">
+        Needs attention
+      </p>
+      <div className="-mx-4 px-4 flex gap-3 overflow-x-auto snap-x snap-mandatory pb-1">
+        {items.map(item => (
+          <Link
+            key={item.id}
+            href={item.href}
+            className="snap-start shrink-0 w-44 rounded-2xl border bg-card p-3 hover:bg-accent transition-colors"
+          >
+            <div className="flex items-start justify-between">
+              <AlertTriangle className={`w-4 h-4 ${item.count > 0 ? 'text-destructive' : 'text-muted-foreground'}`} />
+              <ChevronRight className="w-4 h-4 text-muted-foreground" />
+            </div>
+            <p className={`mt-2 text-2xl font-bold tabular-nums ${item.count > 0 ? 'text-destructive' : ''}`}>
+              {item.count}
+            </p>
+            <p className="text-xs text-muted-foreground mt-0.5">{item.label}</p>
+          </Link>
+        ))}
+      </div>
+    </div>
+  );
+}

components/mobile/WorkerStatusRow.tsx

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+'use client';
+
+/* WorkerStatusRow — phase 03 (DASH-03).
+ *
+ * Compact 3-cell read-only status row showing analyzer worker, RMM worker,
+ * and backup success rate. Each cell is a next/link to the corresponding
+ * desktop admin page. status='ok' = emerald dot, 'warn' = amber, 'down' =
+ * destructive. */
+
+import Link from 'next/link';
+import { ExternalLink } from 'lucide-react';
+
+export type WorkerStatus = 'ok' | 'warn' | 'down';
+
+export interface WorkerStatusEntry {
+  id: string;
+  label: string;
+  value: string;
+  status: WorkerStatus;
+  href: string;
+}
+
+interface WorkerStatusRowProps {
+  entries: WorkerStatusEntry[];
+}
+
+const DOT_COLOR: Record<WorkerStatus, string> = {
+  ok: 'bg-emerald-500',
+  warn: 'bg-amber-500',
+  down: 'bg-destructive',
+};
+
+export function WorkerStatusRow({ entries }: WorkerStatusRowProps) {
+  return (
+    <div>
+      <p className="text-xs font-semibold text-muted-foreground uppercase tracking-wider mb-2">
+        Workers &amp; backups
+      </p>
+      <div className="rounded-2xl border divide-y overflow-hidden">
+        {entries.map(e => (
+          <Link
+            key={e.id}
+            href={e.href}
+            className="flex items-center gap-3 px-4 py-3 hover:bg-accent transition-colors"
+          >
+            <span className={`inline-block w-2 h-2 rounded-full shrink-0 ${DOT_COLOR[e.status]}`} aria-hidden="true" />
+            <span className="text-sm font-medium flex-1">{e.label}</span>
+            <span className="text-sm tabular-nums text-muted-foreground">{e.value}</span>
+            <ExternalLink className="w-3.5 h-3.5 text-muted-foreground shrink-0" />
+          </Link>
+        ))}
+      </div>
+    </div>
+  );
+}