diff --git a/client/components/ui/app-primitives.tsx b/client/components/ui/app-primitives.tsx
new file mode 100644
index 0000000..6bcc4d4
--- /dev/null
+++ b/client/components/ui/app-primitives.tsx
@@ -0,0 +1,159 @@
+import type { ComponentType, ReactNode } from 'react';
+import { Inbox } from 'lucide-react';
+import { cn } from '@/lib/utils';
+import { BrandGlyph } from '@/components/brand/Brand';
+import type { BrandGlyphName } from '@/lib/brand';
+
+type Tone = 'neutral' | 'good' | 'warn' | 'danger' | 'info';
+
+const toneClasses: Record<Tone, string> = {
+  neutral: 'border-border/75 bg-card/95 text-muted-foreground',
+  good: 'border-emerald-500/25 bg-emerald-500/[0.07] text-emerald-700 dark:text-emerald-300',
+  warn: 'border-amber-500/30 bg-amber-500/[0.08] text-amber-700 dark:text-amber-300',
+  danger: 'border-rose-500/30 bg-rose-500/[0.08] text-rose-700 dark:text-rose-300',
+  info: 'border-sky-500/25 bg-sky-500/[0.07] text-sky-700 dark:text-sky-300',
+};
+
+const dotClasses: Record<Tone, string> = {
+  neutral: 'bg-muted-foreground/55',
+  good: 'bg-emerald-500',
+  warn: 'bg-amber-500',
+  danger: 'bg-rose-500',
+  info: 'bg-sky-500',
+};
+
+interface PageHeaderProps {
+  eyebrow?: ReactNode;
+  title: ReactNode;
+  description?: ReactNode;
+  glyph?: BrandGlyphName;
+  icon?: ComponentType<{ className?: string }>;
+  actions?: ReactNode;
+  meta?: ReactNode;
+  className?: string;
+}
+
+export function PageHeader({
+  eyebrow,
+  title,
+  description,
+  glyph,
+  icon: Icon,
+  actions,
+  meta,
+  className,
+}: PageHeaderProps) {
+  return (
+    <section className={cn('flex flex-col gap-4 sm:flex-row sm:items-end sm:justify-between', className)}>
+      <div className="flex min-w-0 items-start gap-3">
+        {glyph && <BrandGlyph name={glyph} className="mt-0.5 hidden sm:inline-grid" />}
+        {Icon && !glyph && (
+          <span className="mt-0.5 hidden h-10 w-10 shrink-0 place-items-center rounded-xl border border-primary/20 bg-primary/[0.08] text-primary shadow-sm shadow-primary/10 sm:grid">
+            <Icon className="h-5 w-5" />
+          </span>
+        )}
+        <div className="min-w-0">
+          {eyebrow && (
+            <p className="mb-1 text-[11px] font-semibold uppercase tracking-[0.18em] text-muted-foreground">
+              {eyebrow}
+            </p>
+          )}
+          <h1 className="text-balance text-2xl font-semibold tracking-tight text-foreground sm:text-3xl">
+            {title}
+          </h1>
+          {description && (
+            <p className="mt-1 max-w-2xl text-sm leading-6 text-muted-foreground">
+              {description}
+            </p>
+          )}
+          {meta && <div className="mt-2 text-xs text-muted-foreground">{meta}</div>}
+        </div>
+      </div>
+      {actions && <div className="flex flex-wrap items-center gap-2 sm:justify-end">{actions}</div>}
+    </section>
+  );
+}
+
+export function SectionSurface({
+  children,
+  className,
+  tone = 'neutral',
+}: {
+  children: ReactNode;
+  className?: string;
+  tone?: Tone;
+}) {
+  return (
+    <section className={cn('surface-premium', tone !== 'neutral' && toneClasses[tone], className)}>
+      {children}
+    </section>
+  );
+}
+
+export function StatusDot({ tone = 'neutral', pulse = false, className }: { tone?: Tone; pulse?: boolean; className?: string }) {
+  return (
+    <span className={cn('relative inline-flex h-2.5 w-2.5 shrink-0', className)} aria-hidden="true">
+      {pulse && <span className={cn('absolute inline-flex h-full w-full animate-ping rounded-full opacity-40', dotClasses[tone])} />}
+      <span className={cn('relative inline-flex h-2.5 w-2.5 rounded-full', dotClasses[tone])} />
+    </span>
+  );
+}
+
+export function MetricCard({
+  label,
+  value,
+  hint,
+  icon: Icon,
+  tone = 'neutral',
+  action,
+  className,
+}: {
+  label: ReactNode;
+  value: ReactNode;
+  hint?: ReactNode;
+  icon?: ComponentType<{ className?: string }>;
+  tone?: Tone;
+  action?: ReactNode;
+  className?: string;
+}) {
+  return (
+    <div className={cn('metric-card', tone !== 'neutral' && toneClasses[tone], className)}>
+      <div className="flex items-start justify-between gap-3">
+        <div className="flex min-w-0 items-center gap-2">
+          {Icon && <Icon className="h-4 w-4 shrink-0 text-current opacity-80" />}
+          <p className="truncate text-[11px] font-semibold uppercase tracking-[0.16em] text-muted-foreground">
+            {label}
+          </p>
+        </div>
+        {action}
+      </div>
+      <p className="metric-value mt-3 text-2xl leading-none sm:text-[1.75rem]">{value}</p>
+      {hint && <p className="mt-2 text-xs leading-5 text-muted-foreground">{hint}</p>}
+    </div>
+  );
+}
+
+export function EmptyState({
+  title,
+  description,
+  icon: Icon = Inbox,
+  action,
+  className,
+}: {
+  title: ReactNode;
+  description?: ReactNode;
+  icon?: ComponentType<{ className?: string }>;
+  action?: ReactNode;
+  className?: string;
+}) {
+  return (
+    <div className={cn('surface-premium flex flex-col items-center justify-center px-6 py-12 text-center', className)}>
+      <span className="grid h-11 w-11 place-items-center rounded-xl border border-border/70 bg-muted/35 text-muted-foreground">
+        <Icon className="h-5 w-5" />
+      </span>
+      <h2 className="mt-4 text-base font-semibold text-foreground">{title}</h2>
+      {description && <p className="mt-1 max-w-md text-sm leading-6 text-muted-foreground">{description}</p>}
+      {action && <div className="mt-4">{action}</div>}
+    </div>
+  );
+}