feat: global platform v2 update

app/page.tsx

@@ -0,0 +1,59 @@
+"use client";
+
+// ============================================================================
+// Root Page - Redirect to Dashboard
+// ============================================================================
+
+import { useEffect, useState } from "react";
+import { useRouter } from "next/navigation";
+import { Loader2 } from "lucide-react";
+import { authApi, workspacesApi } from "@/lib/api";
+import { STORAGE_KEYS } from "@/lib/utils/constants";
+
+export default function RootPage() {
+  const router = useRouter();
+  const [isChecking, setIsChecking] = useState(true);
+
+  useEffect(() => {
+    const checkAuthAndRedirect = async () => {
+      // Check if user is authenticated
+      const token = localStorage.getItem(STORAGE_KEYS.ACCESS_TOKEN);
+      
+      if (!token) {
+        router.replace("/login");
+        return;
+      }
+
+      try {
+        // Verify token is valid
+        await authApi.me();
+
+        // Get workspaces
+        const { items: workspaces } = await workspacesApi.list({ size: 1 });
+
+        if (workspaces.length > 0) {
+          // Check for saved workspace
+          const savedId = localStorage.getItem(STORAGE_KEYS.SELECTED_WORKSPACE);
+          const workspaceId = savedId || workspaces[0].id;
+          router.replace(`/dashboard/${workspaceId}`);
+        } else {
+          // No workspaces - show onboarding or create first workspace
+          router.replace("/dashboard/onboarding");
+        }
+      } catch (err) {
+        // Token invalid - redirect to login
+        localStorage.removeItem(STORAGE_KEYS.ACCESS_TOKEN);
+        router.replace("/login");
+      }
+    };
+
+    checkAuthAndRedirect();
+  }, [router]);
+
+  return (
+    <div className="flex min-h-screen items-center justify-center">
+      <Loader2 className="h-8 w-8 animate-spin text-muted-foreground" />
+    </div>
+  );
+}
+