feat(web): new-object full-width page + create flow + /objects/new

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

web/src/app.tsx

@@ -4,6 +4,7 @@ import { RequireAuth } from "./auth/require-auth";
 import { LoginPage } from "./auth/login-page";
 import { AppShell } from "./shell/app-shell";
 import { ObjectsPage } from "./objects/objects-page";
+import { ObjectNewPage } from "./objects/object-new-page";
 
 export function App() {
   return (
@@ -12,6 +13,7 @@ export function App() {
         <Route path="/login" element={<LoginPage />} />
         <Route element={<RequireAuth />}>
           <Route element={<AppShell />}>
+            <Route path="/objects/new" element={<ObjectNewPage />} />
             <Route path="/objects" element={<ObjectsPage />} />
             <Route path="/objects/:id" element={<ObjectsPage />} />
             <Route path="/" element={<Navigate to="/objects" replace />} />