feat(mobile): swap admin page headers to PageHeader

Mechanical sweep replacing the plain h1+p header markup with the
mobile-aware PageHeader primitive across 12 admin pages: index,
backup, branding, documenso, email, import, invitations, monitoring,
onboarding, reminders, reports, webhooks. Webhooks "Add Webhook"
button preserved via the actions slot.

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

src/app/(dashboard)/[portSlug]/admin/backup/page.tsx

@@ -1,10 +1,9 @@
+import { PageHeader } from '@/components/shared/page-header';
+
 export default function BackupManagementPage() {
   return (
     <div className="space-y-6">
-      <div>
-        <h1 className="text-2xl font-bold text-foreground">Backup Management</h1>
-        <p className="text-muted-foreground">Manage system backups and restoration</p>
-      </div>
+      <PageHeader title="Backup Management" description="Manage system backups and restoration" />
       <div className="flex flex-col items-center justify-center rounded-lg border border-dashed p-12">
         <p className="text-lg font-medium text-muted-foreground">Coming in Layer 4</p>
         <p className="text-sm text-muted-foreground">

src/app/(dashboard)/[portSlug]/admin/branding/page.tsx

@@ -2,6 +2,7 @@ import {
   SettingsFormCard,
   type SettingFieldDef,
 } from '@/components/admin/shared/settings-form-card';
+import { PageHeader } from '@/components/shared/page-header';
 
 const FIELDS: SettingFieldDef[] = [
   {
@@ -47,13 +48,10 @@ const FIELDS: SettingFieldDef[] = [
 export default function BrandingSettingsPage() {
   return (
     <div className="space-y-6">
-      <div>
-        <h1 className="text-2xl font-semibold">Branding</h1>
-        <p className="text-sm text-muted-foreground">
-          Logo, primary color, app name, and email header/footer HTML used by the branded auth shell
-          and outgoing email templates.
-        </p>
-      </div>
+      <PageHeader
+        title="Branding"
+        description="Logo, primary color, app name, and email header/footer HTML used by the branded auth shell and outgoing email templates."
+      />
       <SettingsFormCard
         title="Identity"
         description="App name, logo, and primary color."

src/app/(dashboard)/[portSlug]/admin/documenso/page.tsx

@@ -3,6 +3,7 @@ import {
   type SettingFieldDef,
 } from '@/components/admin/shared/settings-form-card';
 import { DocumensoTestButton } from '@/components/admin/documenso/documenso-test-button';
+import { PageHeader } from '@/components/shared/page-header';
 
 const API_FIELDS: SettingFieldDef[] = [
   {
@@ -48,13 +49,10 @@ const EOI_FIELDS: SettingFieldDef[] = [
 export default function DocumensoSettingsPage() {
   return (
     <div className="space-y-6">
-      <div>
-        <h1 className="text-2xl font-semibold">Documenso & EOI</h1>
-        <p className="text-sm text-muted-foreground">
-          API credentials and default EOI generation pathway. Use the test-connection button to
-          verify a saved configuration before relying on it.
-        </p>
-      </div>
+      <PageHeader
+        title="Documenso & EOI"
+        description="API credentials and default EOI generation pathway. Use the test-connection button to verify a saved configuration before relying on it."
+      />
 
       <SettingsFormCard
         title="Documenso API"

src/app/(dashboard)/[portSlug]/admin/email/page.tsx

@@ -2,6 +2,7 @@ import {
   SettingsFormCard,
   type SettingFieldDef,
 } from '@/components/admin/shared/settings-form-card';
+import { PageHeader } from '@/components/shared/page-header';
 
 const FIELDS: SettingFieldDef[] = [
   {
@@ -79,13 +80,10 @@ const FIELDS: SettingFieldDef[] = [
 export default function EmailSettingsPage() {
   return (
     <div className="space-y-6">
-      <div>
-        <h1 className="text-2xl font-semibold">Email Settings</h1>
-        <p className="text-sm text-muted-foreground">
-          Per-port outgoing email configuration. SMTP credentials and the From address default to
-          environment variables when these fields are blank.
-        </p>
-      </div>
+      <PageHeader
+        title="Email Settings"
+        description="Per-port outgoing email configuration. SMTP credentials and the From address default to environment variables when these fields are blank."
+      />
       <SettingsFormCard
         title="From address & signature"
         description="Identity headers and shared HTML used by system-generated emails."

src/app/(dashboard)/[portSlug]/admin/import/page.tsx

@@ -1,10 +1,9 @@
+import { PageHeader } from '@/components/shared/page-header';
+
 export default function DataImportPage() {
   return (
     <div className="space-y-6">
-      <div>
-        <h1 className="text-2xl font-bold text-foreground">Data Import</h1>
-        <p className="text-muted-foreground">Import data from external sources</p>
-      </div>
+      <PageHeader title="Data Import" description="Import data from external sources" />
       <div className="flex flex-col items-center justify-center rounded-lg border border-dashed p-12">
         <p className="text-lg font-medium text-muted-foreground">Coming in Layer 4</p>
         <p className="text-sm text-muted-foreground">

src/app/(dashboard)/[portSlug]/admin/invitations/page.tsx

@@ -1,15 +1,13 @@
 import { InvitationsManager } from '@/components/admin/invitations/invitations-manager';
+import { PageHeader } from '@/components/shared/page-header';
 
 export default function InvitationsPage() {
   return (
     <div className="space-y-6">
-      <div>
-        <h1 className="text-2xl font-semibold">Invitations</h1>
-        <p className="text-sm text-muted-foreground">
-          Send a single-use invitation to a new CRM user. The recipient sets their own password via
-          the link in the email.
-        </p>
-      </div>
+      <PageHeader
+        title="Invitations"
+        description="Send a single-use invitation to a new CRM user. The recipient sets their own password via the link in the email."
+      />
       <InvitationsManager />
     </div>
   );

src/app/(dashboard)/[portSlug]/admin/onboarding/page.tsx

@@ -1,10 +1,9 @@
+import { PageHeader } from '@/components/shared/page-header';
+
 export default function OnboardingPage() {
   return (
     <div className="space-y-6">
-      <div>
-        <h1 className="text-2xl font-bold text-foreground">Onboarding</h1>
-        <p className="text-muted-foreground">Guided setup for new port configurations</p>
-      </div>
+      <PageHeader title="Onboarding" description="Guided setup for new port configurations" />
       <div className="flex flex-col items-center justify-center rounded-lg border border-dashed p-12">
         <p className="text-lg font-medium text-muted-foreground">Coming in Layer 4</p>
         <p className="text-sm text-muted-foreground">

src/app/(dashboard)/[portSlug]/admin/page.tsx

@@ -20,6 +20,7 @@ import {
 } from 'lucide-react';
 
 import { Card, CardContent, CardDescription, CardHeader, CardTitle } from '@/components/ui/card';
+import { PageHeader } from '@/components/shared/page-header';
 
 interface AdminSection {
   href: string;
@@ -165,13 +166,10 @@ export default async function AdminLandingPage({
   const { portSlug } = await params;
   return (
     <div className="space-y-6">
-      <div>
-        <h1 className="text-2xl font-semibold">Administration</h1>
-        <p className="text-sm text-muted-foreground">
-          Per-port configuration and system administration. Each card below opens a dedicated
-          settings page.
-        </p>
-      </div>
+      <PageHeader
+        title="Administration"
+        description="Per-port configuration and system administration. Each card below opens a dedicated settings page."
+      />
       <div className="grid grid-cols-1 sm:grid-cols-2 lg:grid-cols-3 gap-4">
         {SECTIONS.map((s) => {
           const Icon = s.icon;

src/app/(dashboard)/[portSlug]/admin/reminders/page.tsx

@@ -2,6 +2,7 @@ import {
   SettingsFormCard,
   type SettingFieldDef,
 } from '@/components/admin/shared/settings-form-card';
+import { PageHeader } from '@/components/shared/page-header';
 
 const DEFAULT_FIELDS: SettingFieldDef[] = [
   {
@@ -53,14 +54,10 @@ const DIGEST_FIELDS: SettingFieldDef[] = [
 export default function ReminderSettingsPage() {
   return (
     <div className="space-y-6">
-      <div>
-        <h1 className="text-2xl font-semibold">Reminders</h1>
-        <p className="text-sm text-muted-foreground">
-          Default reminder behaviour for new interests and the optional daily-digest delivery
-          window. Individual users can still configure their own digest preferences in Notifications
-          → Preferences.
-        </p>
-      </div>
+      <PageHeader
+        title="Reminders"
+        description="Default reminder behaviour for new interests and the optional daily-digest delivery window. Individual users can still configure their own digest preferences in Notifications → Preferences."
+      />
 
       <SettingsFormCard
         title="Defaults for new interests"

src/app/(dashboard)/[portSlug]/admin/reports/page.tsx

@@ -1,10 +1,12 @@
+import { PageHeader } from '@/components/shared/page-header';
+
 export default function ScheduledReportsPage() {
   return (
     <div className="space-y-6">
-      <div>
-        <h1 className="text-2xl font-bold text-foreground">Scheduled Reports</h1>
-        <p className="text-muted-foreground">Configure and manage automated report delivery</p>
-      </div>
+      <PageHeader
+        title="Scheduled Reports"
+        description="Configure and manage automated report delivery"
+      />
       <div className="flex flex-col items-center justify-center rounded-lg border border-dashed p-12">
         <p className="text-lg font-medium text-muted-foreground">Coming in Layer 3</p>
         <p className="text-sm text-muted-foreground">

src/app/(dashboard)/[portSlug]/admin/webhooks/page.tsx

@@ -2,6 +2,7 @@
 
 import { useCallback, useEffect, useState } from 'react';
 import { Button } from '@/components/ui/button';
+import { PageHeader } from '@/components/shared/page-header';
 import { Badge } from '@/components/ui/badge';
 import {
   AlertDialog,
@@ -36,7 +37,11 @@ export default function WebhooksPage() {
   const [deleteTarget, setDeleteTarget] = useState<Webhook | null>(null);
   const [expandedId, setExpandedId] = useState<string | null>(null);
   const [regenerating, setRegenerating] = useState<string | null>(null);
-  const [newSecret, setNewSecret] = useState<{ webhookId: string; secret: string; masked: string } | null>(null);
+  const [newSecret, setNewSecret] = useState<{
+    webhookId: string;
+    secret: string;
+    masked: string;
+  } | null>(null);
 
   const loadWebhooks = useCallback(async () => {
     try {
@@ -98,15 +103,20 @@ export default function WebhooksPage() {
 
   return (
     <div className="space-y-6">
-      <div className="flex items-center justify-between">
-        <div>
-          <h1 className="text-2xl font-bold text-foreground">Webhooks</h1>
-          <p className="text-muted-foreground">Configure outgoing webhook integrations</p>
-        </div>
-        <Button onClick={() => { setEditTarget(null); setFormOpen(true); }}>
-          Add Webhook
-        </Button>
-      </div>
+      <PageHeader
+        title="Webhooks"
+        description="Configure outgoing webhook integrations"
+        actions={
+          <Button
+            onClick={() => {
+              setEditTarget(null);
+              setFormOpen(true);
+            }}
+          >
+            Add Webhook
+          </Button>
+        }
+      />
 
       {loading ? (
         <p className="text-sm text-muted-foreground">Loading...</p>
@@ -116,7 +126,13 @@ export default function WebhooksPage() {
           <p className="text-sm text-muted-foreground mt-1">
             Add a webhook to receive real-time notifications of CRM events.
           </p>
-          <Button className="mt-4" onClick={() => { setEditTarget(null); setFormOpen(true); }}>
+          <Button
+            className="mt-4"
+            onClick={() => {
+              setEditTarget(null);
+              setFormOpen(true);
+            }}
+          >
             Add Webhook
           </Button>
         </div>
@@ -141,17 +157,16 @@ export default function WebhooksPage() {
                 </div>
 
                 <div className="flex items-center gap-2 shrink-0">
-                  <Button
-                    variant="ghost"
-                    size="sm"
-                    onClick={() => handleToggleActive(webhook)}
-                  >
+                  <Button variant="ghost" size="sm" onClick={() => handleToggleActive(webhook)}>
                     {webhook.isActive ? 'Disable' : 'Enable'}
                   </Button>
                   <Button
                     variant="ghost"
                     size="sm"
-                    onClick={() => { setEditTarget(webhook); setFormOpen(true); }}
+                    onClick={() => {
+                      setEditTarget(webhook);
+                      setFormOpen(true);
+                    }}
                   >
                     Edit
                   </Button>
@@ -163,11 +178,7 @@ export default function WebhooksPage() {
                   >
                     Delete
                   </Button>
-                  <Button
-                    variant="ghost"
-                    size="sm"
-                    onClick={() => toggleExpand(webhook.id)}
-                  >
+                  <Button variant="ghost" size="sm" onClick={() => toggleExpand(webhook.id)}>
                     {expandedId === webhook.id ? 'Collapse' : 'Details'}
                   </Button>
                 </div>
@@ -228,18 +239,26 @@ export default function WebhooksPage() {
         onSuccess={loadWebhooks}
       />
 
-      <AlertDialog open={!!deleteTarget} onOpenChange={(open) => { if (!open) setDeleteTarget(null); }}>
+      <AlertDialog
+        open={!!deleteTarget}
+        onOpenChange={(open) => {
+          if (!open) setDeleteTarget(null);
+        }}
+      >
         <AlertDialogContent>
           <AlertDialogHeader>
             <AlertDialogTitle>Delete Webhook</AlertDialogTitle>
             <AlertDialogDescription>
-              Delete &quot;{deleteTarget?.name}&quot;? This will also delete all delivery history. This action
-              cannot be undone.
+              Delete &quot;{deleteTarget?.name}&quot;? This will also delete all delivery history.
+              This action cannot be undone.
             </AlertDialogDescription>
           </AlertDialogHeader>
           <AlertDialogFooter>
             <AlertDialogCancel>Cancel</AlertDialogCancel>
-            <AlertDialogAction onClick={handleDelete} className="bg-destructive text-destructive-foreground">
+            <AlertDialogAction
+              onClick={handleDelete}
+              className="bg-destructive text-destructive-foreground"
+            >
               Delete
             </AlertDialogAction>
           </AlertDialogFooter>