feat: developer access permission gates webhooks/API keys/BYOK (v0.71.0)

Webhooks, self-serve API keys, and BYOK AI provider keys had zero
access gating -- any logged-in user, any tier. Adds users.isDeveloper
(boolean, admin-toggled in admin/users/[id] alongside role/tier),
checked via a single hasDeveloperAccess() (lib/permissions.ts) so a
future subscription-tier auto-grant is a one-line change there, not
a redesign across call sites.

requireDeveloper() (lib/api-auth.ts) wraps requireSession() with a
fresh isDeveloper check (same reasoning as requireAdmin re-querying
role: session.user's cookieCache can be up to 5 minutes stale) and
replaces requireSession in all 8 gated routes: webhooks CRUD +
deliveries + redeliver, api-keys CRUD, ai-keys CRUD.

Settings UI: the sidebar hides API Keys/Webhooks nav entries for
non-developers; those pages and the BYOK section of Settings -> AI
show a locked notice instead of the manager component when accessed
directly.

Migration grandfathers in anyone who already has a webhook, API key,
or BYOK key row -- ships as a new gate on existing features, not a
silent lockout of active integrations.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

apps/web/app/api/v1/webhooks/[id]/deliveries/__tests__/route.test.ts

@@ -4,7 +4,7 @@ import { NextRequest } from "next/server";
 const mockSession = { user: { id: "user-1" } };
 
 vi.mock("@/lib/api-auth", () => ({
-  requireSession: vi.fn(),
+  requireDeveloper: vi.fn(),
 }));
 
 const { mockFindFirst, mockSelectChain } = vi.hoisted(() => {
@@ -29,21 +29,21 @@ vi.mock("@epicure/db", () => ({
   desc: vi.fn((a) => ({ a, op: "desc" })),
 }));
 
-const { requireSession } = await import("@/lib/api-auth");
+const { requireDeveloper } = await import("@/lib/api-auth");
 import { GET } from "../route";
 
 const ctx = { params: Promise.resolve({ id: "wh-1" }) };
 
 beforeEach(() => {
   vi.clearAllMocks();
-  vi.mocked(requireSession).mockResolvedValue({ session: mockSession as never, response: null });
+  vi.mocked(requireDeveloper).mockResolvedValue({ session: mockSession as never, response: null });
   mockFindFirst.mockResolvedValue({ id: "wh-1" });
   mockSelectChain.limit.mockResolvedValue([]);
 });
 
 describe("GET /api/v1/webhooks/[id]/deliveries", () => {
   it("returns 401 when not authenticated", async () => {
-    vi.mocked(requireSession).mockResolvedValue({
+    vi.mocked(requireDeveloper).mockResolvedValue({
       session: null,
       response: new Response(JSON.stringify({ error: "Unauthorized" }), { status: 401 }),
     } as never);

apps/web/app/api/v1/webhooks/[id]/deliveries/route.ts

@@ -1,11 +1,11 @@
 import { NextRequest, NextResponse } from "next/server";
 import { db, webhooks, webhookDeliveries, eq, and, desc } from "@epicure/db";
-import { requireSession } from "@/lib/api-auth";
+import { requireDeveloper } from "@/lib/api-auth";
 
 type Params = { params: Promise<{ id: string }> };
 
 export async function GET(_req: NextRequest, { params }: Params) {
-  const { session, response } = await requireSession();
+  const { session, response } = await requireDeveloper();
   if (response) return response;
 
   const { id } = await params;