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/api/team/[id]/route.ts

@@ -0,0 +1,66 @@
+import { NextResponse } from "next/server"
+import { and, eq } from "drizzle-orm"
+import { z } from "zod"
+import { db } from "@/lib/db"
+import { account_members } from "@/lib/db/schema"
+import { getSessionUser } from "@/lib/session"
+
+const patchSchema = z.object({
+  role: z.enum(["member", "viewer"]),
+})
+
+/**
+ * PATCH — change a member's role (member <-> viewer). Owner-only; scoped to
+ * rows the session user owns so a member can't edit someone else's team.
+ */
+export async function PATCH(request: Request, { params }: { params: Promise<{ id: string }> }) {
+  const user = await getSessionUser()
+  if (!user) return NextResponse.json({ error: "Unauthorized" }, { status: 401 })
+
+  const { id } = await params
+  const body = await request.json().catch(() => null)
+  const parsed = patchSchema.safeParse(body)
+  if (!parsed.success) {
+    return NextResponse.json(
+      { error: parsed.error.issues[0]?.message ?? "Invalid input" },
+      { status: 400 }
+    )
+  }
+
+  const [updated] = await db
+    .update(account_members)
+    .set({ role: parsed.data.role })
+    .where(and(eq(account_members.id, id), eq(account_members.owner_id, user.id)))
+    .returning({
+      id: account_members.id,
+      email: account_members.email,
+      role: account_members.role,
+      status: account_members.status,
+    })
+
+  if (!updated) return NextResponse.json({ error: "Not found" }, { status: 404 })
+
+  return NextResponse.json(updated)
+}
+
+/**
+ * DELETE — revoke a member's access. Sets status='revoked' and clears
+ * member_id so getAccountContext immediately stops resolving them to this
+ * owner. Owner-only; scoped to rows the session user owns.
+ */
+export async function DELETE(_: Request, { params }: { params: Promise<{ id: string }> }) {
+  const user = await getSessionUser()
+  if (!user) return NextResponse.json({ error: "Unauthorized" }, { status: 401 })
+
+  const { id } = await params
+
+  const [revoked] = await db
+    .update(account_members)
+    .set({ status: "revoked", member_id: null })
+    .where(and(eq(account_members.id, id), eq(account_members.owner_id, user.id)))
+    .returning({ id: account_members.id })
+
+  if (!revoked) return NextResponse.json({ error: "Not found" }, { status: 404 })
+
+  return NextResponse.json({ ok: true })
+}