feat(web): nested object routes + in-pane edit form + edit flow

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

web/src/app.tsx

@@ -5,6 +5,9 @@ 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";
+import { ObjectDetail } from "./objects/object-detail";
+import { ObjectEditForm } from "./objects/object-edit-form";
+import { SelectPrompt } from "./objects/select-prompt";
 
 export function App() {
   return (
@@ -14,8 +17,11 @@ export function App() {
         <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="/objects" element={<ObjectsPage />}>
+              <Route index element={<SelectPrompt />} />
+              <Route path=":id" element={<ObjectDetail />} />
+              <Route path=":id/edit" element={<ObjectEditForm />} />
+            </Route>
             <Route path="/" element={<Navigate to="/objects" replace />} />
           </Route>
         </Route>