chore(template): clean-slate template snapshot from bb4a0c7

Curated, product-agnostic snapshot of the post-story-04 tree: demo
content deleted, auth-only reference feature, web-next shell, all gates
green. Product-specific docs, ADRs 027-029, PRDs/epics/archive, editor
library traces, and product naming are curated out; generic template
repairs (coverage provider devDeps, root test:coverage script, live
lint fixes, root-only release-please) are kept. See TEMPLATE.md for
provenance, curation list, and usage.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_016j8z4VHjedXDTjEDNg7qHK

packages/core-trpc/src/client.test.ts

@@ -0,0 +1,12 @@
+import { describe, it, expect } from "vitest";
+import { useTRPC, TRPCProvider } from "./client";
+
+describe("core-trpc client exports", () => {
+  it("exports useTRPC hook", () => {
+    expect(useTRPC).toBeTypeOf("function");
+  });
+
+  it("exports TRPCProvider component", () => {
+    expect(TRPCProvider).toBeTypeOf("function");
+  });
+});