Consolidate audit-fixes branch: webhooks, integrations, and deploy hardening

Batch commit of the pending working tree on security/audit-fixes-2026-07.
Major areas:
- Outbound webhooks / Zapier: schema + signed delivery with retries, public
  v1 API (REST-hook subscribe/unsubscribe), settings UI, cron drain.
- Deploy hardening: email via SMTP2GO (Resend fully removed), verified DB TLS
  (DATABASE_SSL=require + DATABASE_CA), storage fails loud in production when
  Spaces is unconfigured instead of silently using ephemeral disk.
- Integrations & features (concurrent work): accounting (QuickBooks/Xero),
  e-signature (DocuSign/Dropbox Sign), PayPal, geocoding/maps, onboarding,
  expanded legal pages.
- DB migrations 0006–0009.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

components/marketing/navbar.tsx

@@ -3,7 +3,8 @@
 import { useState, useEffect } from "react"
 import Link from "next/link"
 import { motion, AnimatePresence } from "framer-motion"
-import { Building2, Menu, X, ArrowRight } from "lucide-react"
+import { Menu, X, ArrowRight } from "lucide-react"
+import { Logo } from "@/components/shared/logo"
 
 const NAV_LINKS = [
   { label: "Features", href: "#features" },
@@ -35,12 +36,7 @@ export function Navbar() {
         }`}
       >
         <div className="mx-auto flex h-16 max-w-7xl items-center justify-between px-6">
-          <Link href="/" className="flex items-center gap-2 group">
-            <div className="flex h-8 w-8 items-center justify-center rounded-lg bg-gradient-to-br from-indigo-500 to-violet-600 shadow-lg shadow-indigo-500/30 group-hover:shadow-indigo-500/50 transition-shadow">
-              <Building2 className="h-4 w-4 text-white" />
-            </div>
-            <span className="font-bold text-white tracking-tight">Property Management Network</span>
-          </Link>
+          <Logo size="md" />
 
           <div className="hidden md:flex items-center gap-1">
             {NAV_LINKS.map((l) => (