feat: add home page and refactor workspace entry UI

tests/unit/home/default-route.test.ts

@@ -0,0 +1,14 @@
+import { describe, expect, it } from 'vitest'
+import {
+  AUTHENTICATED_HOME_PATHNAME,
+  buildAuthenticatedHomeTarget,
+} from '@/lib/home/default-route'
+
+describe('authenticated home default route', () => {
+  it('uses /home as the only authenticated default pathname', () => {
+    expect(AUTHENTICATED_HOME_PATHNAME).toBe('/home')
+    expect(buildAuthenticatedHomeTarget()).toEqual({
+      pathname: '/home',
+    })
+  })
+})