refactor: establish local frontend workspace boundaries

OpenSpec change: evolve-frontend-stack

src/app/routes/AppRoutes.test.tsx

@@ -1,12 +1,11 @@
 import { MantineProvider } from "@mantine/core";
 import { QueryClientProvider } from "@tanstack/react-query";
 import { fireEvent, render, screen, waitFor } from "@testing-library/react";
+import { cssVariablesResolver, theme } from "@wealthledger/ui/theme";
 import { HttpResponse, http } from "msw";
 import { MemoryRouter } from "react-router";
 import { describe, expect, it } from "vitest";
-
 import { AuthProvider } from "@/features/auth";
-import { cssVariablesResolver, theme } from "@/shared/theme";
 import { createTestQueryClient } from "@/test/query";
 import { server } from "@/test/server";
 import { AppRoutes } from "./AppRoutes";

src/app/routes/ProtectedLayout.tsx

@@ -1,6 +1,5 @@
 import type { FC } from "react";
-import { AppBreadcrumbs } from "@/app/ui";
-import { AppShell } from "@/shared/ui";
+import { AppBreadcrumbs, AppShell } from "@/app/ui";
 import { ProtectedDocumentTitle } from "./DocumentTitle";
 
 const ProtectedLayout: FC = () => {