chore: scaffold monorepo and migrate uhd_web design system (W0-A)

- pnpm workspace: apps/{web,server}, packages/{contracts,db,domain,adapters,tasks,agent,testkit}
- server: Hono + zod-openapi, API Key auth with scopes, redacting pino logger, SSE event bus with replay, worker heartbeat
- db: Kysely + pg, file migrator, 0001_init (settings/api_key/audit_event/outbox_event)
- web: React Router 7 SPA console shell with 12 workspace placeholders, uhd_web tokens/ui/guard scripts
- docs: ADR-001 (Node over Deno), dev runbook, design system rules

Co-Authored-By: Claude Fable 5.1 <[email protected]>

apps/web/app/components/console/nav.test.ts

@@ -0,0 +1,15 @@
+import { describe, expect, it } from "vitest";
+import { findNavItem, NAV_ITEMS } from "./nav";
+
+describe("控制台导航", () => {
+  it("12 个工作区，路径唯一", () => {
+    expect(NAV_ITEMS).toHaveLength(12);
+    expect(new Set(NAV_ITEMS.map((i) => i.to)).size).toBe(12);
+  });
+
+  it("按最长前缀匹配当前项", () => {
+    expect(findNavItem("/")?.label).toBe("首页");
+    expect(findNavItem("/library/abc")?.label).toBe("媒体库");
+    expect(findNavItem("/nope")).toBeUndefined();
+  });
+});