feat: add workspace management editor

frontend/src/shell/AppShell.new-session.test.tsx

@@ -18,6 +18,7 @@ beforeEach(() => {
   (globalThis as any).EventSource = FakeEventSource;
   useSessionStore.getState().resetSession();
   server.use(
+    http.get("http://localhost:8787/me", () => HttpResponse.json({ issuer: "test", subject: "test", displayName: "Test", isAdmin: false })),
     http.get("http://localhost:8787/sessions", () => HttpResponse.json([])),
     http.get("http://localhost:8787/settings", () =>
       HttpResponse.json({ workspace: "default", provider: "test", model: "test", thinking: "low" })),
@@ -148,6 +149,19 @@ test("model selector shows the three Pi-enabled models and stores the selected p
     }));
 });
 
+test("opens Workspace management from the right sidebar without interrupting the shell", async () => {
+  server.use(
+    http.get("http://localhost:8787/workspace-registry/status", () =>
+      HttpResponse.json({ branch: "main", ahead: 0, behind: 0, degraded: false })),
+  );
+  renderShell();
+
+  await userEvent.click(screen.getByRole("button", { name: "Workspace management" }));
+
+  expect(await screen.findByRole("heading", { name: "Workspace management" })).toBeVisible();
+  expect(screen.getByTestId("app-shell")).toHaveAttribute("data-activity-layout", "closed");
+});
+
 
 test("marks the composer as awaiting input for a pending freetext gate", () => {
   useSessionStore.setState({