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)/settings/api-keys/page.tsx

@@ -0,0 +1,48 @@
+import { redirect } from "next/navigation"
+import Link from "next/link"
+import { desc, eq } from "drizzle-orm"
+import { db } from "@/lib/db"
+import { api_keys } from "@/lib/db/schema"
+import { getSessionUser } from "@/lib/session"
+import { ApiKeyManager, type ApiKeyRow } from "@/components/dashboard/api-key-manager"
+
+export const metadata = { title: "API Keys" }
+
+export default async function ApiKeysSettingsPage() {
+  const user = await getSessionUser()
+  if (!user) redirect("/login")
+
+  const rows = await db
+    .select({
+      id: api_keys.id,
+      name: api_keys.name,
+      key_prefix: api_keys.key_prefix,
+      created_at: api_keys.created_at,
+      last_used_at: api_keys.last_used_at,
+      revoked_at: api_keys.revoked_at,
+    })
+    .from(api_keys)
+    .where(eq(api_keys.user_id, user.id))
+    .orderBy(desc(api_keys.created_at))
+
+  const keys: ApiKeyRow[] = rows
+
+  return (
+    <div className="max-w-2xl space-y-6">
+      <div>
+        <h2 className="text-lg font-semibold text-white">API Keys</h2>
+        <p className="text-sm text-white/40">
+          Create keys to authenticate with the public REST API. See the{" "}
+          <Link
+            href="/api-docs"
+            className="text-indigo-400 underline underline-offset-2 transition hover:text-indigo-300"
+          >
+            API documentation
+          </Link>{" "}
+          for available endpoints.
+        </p>
+      </div>
+      <ApiKeyManager initialKeys={keys} />
+    </div>
+  )
+}