feat(settings): Phase 2 — all 15 tabs implemented

Site tabs:
- Visibility (public toggle, share link, password protection)
- Privacy (data collection toggles, geo level, retention info)
- Bot & Spam (filtering toggle, stats cards)
- Reports (scheduled reports + alert channels list with test/pause/delete)
- Integrations (GSC + BunnyCDN connect/disconnect cards)

Workspace tabs:
- Members (member list, invite form with role selector)
- Notifications (dynamic toggles from API categories)
- Audit Log (action log with timestamps)

Account tabs:
- Security (wraps existing ProfileSettings security tab)
- Devices (wraps existing TrustedDevicesCard + SecurityActivityCard)

No more "Coming soon" placeholders. All tabs are functional.

components/settings/unified/tabs/AccountSecurityTab.tsx

@@ -0,0 +1,16 @@
+'use client'
+
+import ProfileSettings from '@/components/settings/ProfileSettings'
+
+export default function AccountSecurityTab() {
+  return (
+    <div className="space-y-6">
+      <div>
+        <h3 className="text-base font-semibold text-white mb-1">Security</h3>
+        <p className="text-sm text-neutral-400">Manage your password and two-factor authentication.</p>
+      </div>
+
+      <ProfileSettings activeTab="security" borderless />
+    </div>
+  )
+}