feat(apps): add unit tests for providers + bind-production + cms config

web-next: bindAllProduction calls all 4 feature binders exactly once;
Providers renders children. web-tanstack: equivalent providers + bind tests.
cms: payload.config exports a SanitizedConfig with all expected collections.

Spec: §6.7, §9

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

apps/web-tanstack/src/routes/__root.test.tsx

@@ -0,0 +1,23 @@
+import { describe, it, expect, vi } from "vitest";
+import { render, screen } from "@testing-library/react";
+import "@testing-library/jest-dom";
+
+// Mock @tanstack/react-router so we don't need a full router context
+vi.mock("@tanstack/react-router", () => ({
+  createRootRoute: vi.fn((opts: { component: React.ComponentType }) => ({
+    options: { component: opts.component },
+  })),
+  Outlet: () => <div data-testid="outlet" />,
+}));
+
+describe("Root route", () => {
+  it("wraps Outlet with TanstackTrpcProvider (children render)", async () => {
+    const { Route } = await import("./__root");
+    // eslint-disable-next-line @typescript-eslint/no-explicit-any
+    const RootComponent = (Route as any).options.component as React.ComponentType;
+
+    render(<RootComponent />);
+
+    expect(screen.getByTestId("outlet")).toBeInTheDocument();
+  });
+});