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>

app/(dashboard)/rent/generate/page.tsx

@@ -3,6 +3,7 @@ import { and, eq } from "drizzle-orm"
 import { db } from "@/lib/db"
 import { leases as leasesTable } from "@/lib/db/schema"
 import { getSessionUser } from "@/lib/session"
+import { getEffectiveOwnerId } from "@/lib/account"
 import { BulkGenerateForm } from "./bulk-generate-form"
 
 export const metadata = { title: "Generate Rent" }
@@ -11,8 +12,10 @@ export default async function GenerateRentPage() {
   const user = await getSessionUser()
   if (!user) redirect("/login")
 
+  const ownerId = await getEffectiveOwnerId(user.id)
+
   const leases = await db.query.leases.findMany({
-    where: and(eq(leasesTable.user_id, user.id), eq(leasesTable.status, "active")),
+    where: and(eq(leasesTable.user_id, ownerId), eq(leasesTable.status, "active")),
     columns: { id: true, rent_amount: true },
     with: {
       tenant: { columns: { first_name: true, last_name: true } },

app/(dashboard)/rent/import/page.tsx

@@ -3,6 +3,7 @@ import { and, eq } from "drizzle-orm"
 import { db } from "@/lib/db"
 import { tenants as tenantsTable, properties } from "@/lib/db/schema"
 import { getSessionUser } from "@/lib/session"
+import { getEffectiveOwnerId } from "@/lib/account"
 import { BackButton } from "@/components/ui/back-button"
 import { RentCsvImport } from "./rent-csv-import"
 
@@ -12,8 +13,10 @@ export default async function ImportRentPage() {
   const user = await getSessionUser()
   if (!user) redirect("/login")
 
+  const ownerId = await getEffectiveOwnerId(user.id)
+
   const tenants = await db.query.tenants.findMany({
-    where: and(eq(tenantsTable.user_id, user.id), eq(tenantsTable.status, "active")),
+    where: and(eq(tenantsTable.user_id, ownerId), eq(tenantsTable.status, "active")),
     columns: { id: true, first_name: true, last_name: true },
     with: {
       unit: { columns: { unit_number: true } },
@@ -24,7 +27,7 @@ export default async function ImportRentPage() {
   const properties_ = await db
     .select({ id: properties.id, name: properties.name })
     .from(properties)
-    .where(eq(properties.user_id, user.id))
+    .where(eq(properties.user_id, ownerId))
 
   return (
     <div className="mx-auto max-w-3xl space-y-6">

app/(dashboard)/rent/new/page.tsx

@@ -3,6 +3,7 @@ import { and, asc, eq } from "drizzle-orm"
 import { db } from "@/lib/db"
 import { tenants as tenantsTable } from "@/lib/db/schema"
 import { getSessionUser } from "@/lib/session"
+import { getEffectiveOwnerId } from "@/lib/account"
 import { RentPaymentForm } from "@/components/forms/rent-payment-form"
 import { BackButton } from "@/components/ui/back-button"
 
@@ -12,8 +13,10 @@ export default async function NewRentPaymentPage() {
   const user = await getSessionUser()
   if (!user) redirect("/login")
 
+  const ownerId = await getEffectiveOwnerId(user.id)
+
   const tenants = await db.query.tenants.findMany({
-    where: and(eq(tenantsTable.user_id, user.id), eq(tenantsTable.status, "active")),
+    where: and(eq(tenantsTable.user_id, ownerId), eq(tenantsTable.status, "active")),
     columns: { id: true, first_name: true, last_name: true, property_id: true, unit_id: true },
     with: {
       unit: { columns: { unit_number: true, rent_amount: true } },

app/(dashboard)/rent/page.tsx

@@ -3,6 +3,7 @@ import { eq, desc } from "drizzle-orm"
 import { db } from "@/lib/db"
 import { rent_payments } from "@/lib/db/schema"
 import { getSessionUser } from "@/lib/session"
+import { getEffectiveOwnerId } from "@/lib/account"
 import Link from "next/link"
 import { CreditCard, Plus, Upload } from "lucide-react"
 import { EmptyState } from "@/components/shared/empty-state"
@@ -15,8 +16,10 @@ export default async function RentPage() {
   const user = await getSessionUser()
   if (!user) redirect("/login")
 
+  const ownerId = await getEffectiveOwnerId(user.id)
+
   const payments = await db.query.rent_payments.findMany({
-    where: eq(rent_payments.user_id, user.id),
+    where: eq(rent_payments.user_id, ownerId),
     with: {
       tenant: { columns: { first_name: true, last_name: true } },
       property: { columns: { name: true } },