feat: Dokploy-style sidebar layout for site pages

Sidebar takes full viewport height with Pulse logo at top. No Header
on site pages — UtilityBar in content area provides theme toggle, app
launcher, notifications, and user menu. Non-site authenticated pages
keep static Header. No footer on dashboard pages.

components/dashboard/DashboardShell.tsx

@@ -1,6 +1,7 @@
 'use client'
 
 import Sidebar from './Sidebar'
+import UtilityBar from './UtilityBar'
 import { useSidebar } from '@/lib/sidebar-context'
 
 export default function DashboardShell({
@@ -13,11 +14,14 @@ export default function DashboardShell({
   const { mobileOpen, closeMobile } = useSidebar()
 
   return (
-    <div className="flex flex-1 overflow-hidden">
+    <div className="flex h-screen overflow-hidden">
       <Sidebar siteId={siteId} mobileOpen={mobileOpen} onMobileClose={closeMobile} />
-      <main className="flex-1 min-w-0 overflow-y-auto">
-        {children}
-      </main>
+      <div className="flex-1 flex flex-col min-w-0 overflow-hidden">
+        <UtilityBar />
+        <main className="flex-1 overflow-y-auto">
+          {children}
+        </main>
+      </div>
     </div>
   )
 }

components/dashboard/Sidebar.tsx

@@ -253,8 +253,23 @@ export default function Sidebar({
 
     return (
       <div className="flex flex-col h-full">
+        {/* Logo */}
+        <Link
+          href="/"
+          className={`flex items-center gap-2.5 px-4 py-4 border-b border-neutral-200 dark:border-neutral-800 shrink-0 ${isCollapsed ? 'justify-center' : ''}`}
+        >
+          <img
+            src="/pulse_icon_no_margins.png"
+            alt="Pulse"
+            className="w-8 h-8 shrink-0"
+          />
+          {!isCollapsed && (
+            <span className="text-lg font-bold text-neutral-900 dark:text-white tracking-tight">Pulse</span>
+          )}
+        </Link>
+
         {/* Site Picker */}
-        <div className="pt-4 pb-2">
+        <div className="pt-3 pb-2">
           <SitePicker sites={sites} currentSiteId={siteId} collapsed={isCollapsed} />
         </div>
 
@@ -319,7 +334,7 @@ export default function Sidebar({
 
       {/* Desktop sidebar */}
       <aside
-        className={`hidden lg:flex flex-col shrink-0 border-r border-neutral-200 dark:border-neutral-800 bg-white dark:bg-neutral-900 transition-[width] duration-200 overflow-hidden ${
+        className={`hidden lg:flex flex-col shrink-0 border-r border-neutral-200 dark:border-neutral-800 bg-white dark:bg-neutral-900 transition-[width] duration-200 ${
           collapsed ? 'w-[68px]' : 'w-60'
         }`}
       >

components/dashboard/UtilityBar.tsx

@@ -0,0 +1,102 @@
+'use client'
+
+import { useEffect, useState } from 'react'
+import { useRouter } from 'next/navigation'
+import Link from 'next/link'
+import { ThemeToggle, AppLauncher, UserMenu, type CipheraApp, MenuIcon } from '@ciphera-net/ui'
+import { useAuth } from '@/lib/auth/context'
+import { useSettingsModal } from '@/lib/settings-modal-context'
+import { getUserOrganizations, switchContext, type OrganizationMember } from '@/lib/api/organization'
+import { setSessionAction } from '@/app/actions/auth'
+import { logger } from '@/lib/utils/logger'
+import { useSidebar } from '@/lib/sidebar-context'
+import NotificationCenter from '@/components/notifications/NotificationCenter'
+
+const CIPHERA_APPS: CipheraApp[] = [
+  {
+    id: 'pulse',
+    name: 'Pulse',
+    description: 'Your current app — Privacy-first analytics',
+    icon: 'https://ciphera.net/pulse_icon_no_margins.png',
+    href: 'https://pulse.ciphera.net',
+    isAvailable: false,
+  },
+  {
+    id: 'drop',
+    name: 'Drop',
+    description: 'Secure file sharing',
+    icon: 'https://ciphera.net/drop_icon_no_margins.png',
+    href: 'https://drop.ciphera.net',
+    isAvailable: true,
+  },
+  {
+    id: 'auth',
+    name: 'Auth',
+    description: 'Your Ciphera account settings',
+    icon: 'https://ciphera.net/auth_icon_no_margins.png',
+    href: 'https://auth.ciphera.net',
+    isAvailable: true,
+  },
+]
+
+export default function UtilityBar() {
+  const auth = useAuth()
+  const router = useRouter()
+  const { openSettings } = useSettingsModal()
+  const { openMobile } = useSidebar()
+  const [orgs, setOrgs] = useState<OrganizationMember[]>([])
+
+  useEffect(() => {
+    if (auth.user) {
+      getUserOrganizations()
+        .then((organizations) => setOrgs(Array.isArray(organizations) ? organizations : []))
+        .catch(err => logger.error('Failed to fetch orgs for utility bar', err))
+    }
+  }, [auth.user])
+
+  const handleSwitchOrganization = async (orgId: string | null) => {
+    if (!orgId) return
+    try {
+      const { access_token } = await switchContext(orgId)
+      await setSessionAction(access_token)
+      sessionStorage.setItem('pulse_switching_org', 'true')
+      window.location.reload()
+    } catch (err) {
+      logger.error('Failed to switch organization', err)
+    }
+  }
+
+  return (
+    <div className="shrink-0 flex items-center justify-between border-b border-neutral-200 dark:border-neutral-800 bg-white dark:bg-neutral-900 px-4 sm:px-6 py-2">
+      {/* Left: mobile sidebar toggle */}
+      <button
+        onClick={openMobile}
+        className="lg:hidden p-2 -ml-2 text-neutral-600 dark:text-neutral-400 hover:text-neutral-900 dark:hover:text-white transition-colors"
+        aria-label="Open navigation"
+      >
+        <MenuIcon className="w-5 h-5" />
+      </button>
+      <div className="hidden lg:block" />
+
+      {/* Right: actions */}
+      <div className="flex items-center gap-3">
+        <ThemeToggle />
+        <AppLauncher
+          apps={CIPHERA_APPS}
+          currentAppId="pulse"
+        />
+        <NotificationCenter />
+        <UserMenu
+          auth={auth}
+          LinkComponent={Link}
+          orgs={orgs}
+          activeOrgId={auth.user?.org_id}
+          onSwitchOrganization={handleSwitchOrganization}
+          onCreateOrganization={() => router.push('/onboarding')}
+          allowPersonalOrganization={false}
+          onOpenSettings={openSettings}
+        />
+      </div>
+    </div>
+  )
+}