feat(auth): add org/dept/position management, user page, and Phase 2 completion

Complete Phase 2 identity & authentication module:
- Organization CRUD with tree structure (parent_id + materialized path)
- Department CRUD nested under organizations with tree support
- Position CRUD nested under departments
- User management page with table, create/edit modal, role assignment
- Organization architecture page with 3-panel tree layout
- Frontend API layer for orgs/depts/positions
- Sidebar navigation updated with organization menu item
- Fix parse_ttl edge case for strings ending in 'd' (e.g. "invalid")

apps/web/src/App.tsx

@@ -6,6 +6,8 @@ import MainLayout from './layouts/MainLayout';
 import Login from './pages/Login';
 import Home from './pages/Home';
 import Roles from './pages/Roles';
+import Users from './pages/Users';
+import Organizations from './pages/Organizations';
 import { useAuthStore } from './stores/auth';
 import { useAppStore } from './stores/app';
 
@@ -40,8 +42,9 @@ export default function App() {
                 <MainLayout>
                   <Routes>
                     <Route path="/" element={<Home />} />
-                    <Route path="/users" element={<div>用户管理（开发中）</div>} />
+                    <Route path="/users" element={<Users />} />
                     <Route path="/roles" element={<Roles />} />
+                    <Route path="/organizations" element={<Organizations />} />
                     <Route path="/settings" element={<div>系统设置（开发中）</div>} />
                   </Routes>
                 </MainLayout>