feat: complete catalog-driven preprocessing

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

@@ -20,6 +20,7 @@ beforeEach(() => {
     issuer: "test", subject: "test", roles: ["user"], permissions: ["session.use"],
     isAdmin: false, csrfToken: null, session: null,
   });
+  workspacePreferences.reset();
   localStorage.clear();
   FakeEventSource.instances = [];
   (globalThis as any).EventSource = FakeEventSource;
@@ -29,7 +30,19 @@ beforeEach(() => {
     http.get("/api/sessions", () => HttpResponse.json([])),
     http.get("/api/settings", () =>
       HttpResponse.json({ workspace: "default", provider: "test", model: "test", thinking: "low" })),
-    http.get("/api/workspaces", () => HttpResponse.json([])),
+    http.get("/api/workspaces", () => HttpResponse.json([{
+      id: "default",
+      name: "default",
+      file: "default/workspace.yaml",
+      displayName: "Default",
+      configurationState: "ready",
+      revision: {
+        id: "default",
+        commit: "a".repeat(40),
+        blob: "b".repeat(40),
+        snapshotPath: "/data/workspaces/default.yaml",
+      },
+    }])),
     http.get("/api/models", () => HttpResponse.json({ models: [] })),
   );
 });
@@ -54,6 +67,26 @@ test("New session starts prewarm without delaying composer focus", async () => {
   expect(composer).toHaveClass("thot-awaiting-input");
 });
 
+test("a known preprocessing requirement disables New session", async () => {
+  server.use(
+    http.get("/api/workspaces/default/preprocessing", () => HttpResponse.json({
+      schemaVersion: 1,
+      workspaceId: "default",
+      state: "required",
+      actionable: true,
+      clearable: true,
+      detail: "Catalog revision 18 is not indexed.",
+      metadataRevision: 18,
+    })),
+  );
+  renderShell();
+
+  const newSession = screen.getByRole("button", { name: "New session" });
+  await waitFor(() => expect(newSession).toBeDisabled());
+  expect(newSession).toHaveAttribute("data-navigation-state", "unavailable");
+  expect(newSession).toHaveAttribute("title", "Catalog revision 18 is not indexed.");
+});
+
 test("records the prompt without central duplication, then opens the live log", async () => {
   let releaseCreate!: () => void;
   const createMayFinish = new Promise<void>((resolve) => { releaseCreate = resolve; });