Add assistant creation flows with prompt and workflow modes.

Build the prompt-mode creation form, add a workflow page, and reorganize sidebar navigation into assistant sub-routes.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/components/layout/AppShell.tsx

@@ -6,6 +6,7 @@ import { Topbar } from "./Topbar";
 
 import { HomePage } from "@/components/pages/HomePage";
 import { AssistantPage } from "@/components/pages/AssistantPage";
+import { AssistantWorkflowPage } from "@/components/pages/AssistantWorkflowPage";
 import { ComponentsPage } from "@/components/pages/ComponentsPage";
 import { HistoryPage } from "@/components/pages/HistoryPage";
 import { TestPage } from "@/components/pages/TestPage";
@@ -14,7 +15,8 @@ import { ProfilePage } from "@/components/pages/ProfilePage";
 
 export type NavKey =
   | "home"
-  | "assistants"
+  | "assistant-prompt"
+  | "assistant-workflow"
   | "components"
   | "history"
   | "test"
@@ -38,8 +40,11 @@ export function AppShell() {
         <Topbar />
 
         <div className="flex-1 overflow-y-auto px-8 py-7">
-          {active === "home" && <HomePage />}
-          {active === "assistants" && <AssistantPage />}
+          {active === "home" && <HomePage onNavigate={setActive} />}
+
+          {active === "assistant-prompt" && <AssistantPage />}
+          {active === "assistant-workflow" && <AssistantWorkflowPage />}
+
           {active === "components" && <ComponentsPage />}
           {active === "history" && <HistoryPage />}
           {active === "test" && <TestPage />}