Role split and owner gating

src/app/[locale]/dashboard/new/page.tsx

@@ -1,4 +1,4 @@
-import { getSessionUser } from "@/lib/session";
+import { getSessionUser, canMutate } from "@/lib/session";
 import { getTranslations } from "next-intl/server";
 import { redirect } from "next/navigation";
 import { OnboardingFlow } from "@/components/onboarding/onboarding-flow";
@@ -16,11 +16,17 @@ import Link from "next/link";
  *
  * Platform admins are redirected to /dashboard — they shouldn't be
  * creating tenant instances under their own org.
+ *
+ * Slice 5: customer-side `user` role is also redirected — only owners
+ * may create new instances. The server-side POST handler enforces the
+ * same; this redirect is purely UX so /user-role members don't land on
+ * a wizard that will 403 on submit.
  */
 export default async function NewInstancePage() {
   const user = await getSessionUser();
   if (!user) redirect("/login");
   if (user.isPlatform) redirect("/dashboard");
+  if (!canMutate(user)) redirect("/dashboard");
 
   const t = await getTranslations("dashboard");
 

src/app/[locale]/dashboard/page.tsx

@@ -1,4 +1,4 @@
-import { getSessionUser } from "@/lib/session";
+import { getSessionUser, canMutate } from "@/lib/session";
 import { getTranslations, getFormatter } from "next-intl/server";
 import { redirect } from "next/navigation";
 import { listTenants } from "@/lib/k8s";
@@ -149,8 +149,39 @@ export default async function DashboardPage() {
     (r) => !r.tenantName || !orgTenants.some((t) => t.metadata.name === r.tenantName)
   );
 
+  // Slice 5: only owners (and platform users, who'd typically be using
+  // the admin panel anyway) see the "Create new instance" link. A
+  // `user`-role member sees the dashboard but not the create flow —
+  // they need to ask an owner.
+  const canCreate = canMutate(user);
+
   // First-time user: empty company. Show the onboarding wizard inline.
+  // Note: the registering user is always granted `owner` on their new
+  // org by registerCustomer, so this branch is only reachable by an
+  // owner — no role check needed here. But a customer-side `user`
+  // promoted into a fresh empty org (Slice 7 invites) would also land
+  // here without permission to submit. Belt-and-braces gate.
   if (orgTenants.length === 0 && inflightRequests.length === 0) {
+    if (!canCreate) {
+      return (
+        <div>
+          <div className="mb-8 animate-in">
+            <h1 className="font-display text-2xl font-semibold accent-rule mb-2">
+              {t("title")}
+            </h1>
+            <p className="text-text-secondary text-sm mt-4">
+              {t("welcome", { name: user.name || user.email })}
+            </p>
+          </div>
+          <Card className="animate-in animate-in-delay-1">
+            <p className="text-sm text-text-secondary text-center py-6">
+              {t("noAccessNoInstances")}
+            </p>
+          </Card>
+        </div>
+      );
+    }
+
     return (
       <div>
         <div className="mb-8 animate-in">
@@ -170,7 +201,7 @@ export default async function DashboardPage() {
   }
 
   // Returning customer: list of tenants + in-flight requests, plus
-  // a button to add another instance.
+  // a button to add another instance (owners only).
   return (
     <div>
       <div className="mb-8 animate-in flex items-start justify-between gap-4">
@@ -183,12 +214,14 @@ export default async function DashboardPage() {
           </p>
         </div>
 
-        <Link
-          href="/dashboard/new"
-          className="shrink-0 inline-flex items-center gap-1.5 py-2 px-4 bg-accent text-white text-xs font-medium rounded-lg hover:bg-accent-dim transition-colors"
-        >
-          <span>+</span> {t("createInstance")}
-        </Link>
+        {canCreate && (
+          <Link
+            href="/dashboard/new"
+            className="shrink-0 inline-flex items-center gap-1.5 py-2 px-4 bg-accent text-white text-xs font-medium rounded-lg hover:bg-accent-dim transition-colors"
+          >
+            <span>+</span> {t("createInstance")}
+          </Link>
+        )}
       </div>
 
       {/* In-flight (pending/approved/provisioning/rejected) requests */}

src/app/[locale]/tenants/[name]/page.tsx

@@ -1,4 +1,4 @@
-import { getSessionUser } from "@/lib/session";
+import { getSessionUser, canMutate } from "@/lib/session";
 import { getTranslations, getFormatter } from "next-intl/server";
 import { redirect, notFound } from "next/navigation";
 import { getTenant } from "@/lib/k8s";
@@ -34,6 +34,11 @@ export default async function TenantDetailPage({
     notFound();
   }
 
+  // Slice 5: editable surface gated on owner role. Platform users always
+  // can edit; customer-side, only `owner` may. `user`-role members see
+  // the same page but with edit controls hidden / fields read-only.
+  const canEdit = canMutate(user);
+
   const enabledPackages = tenant.spec.packages || [];
   const workspaceFiles = tenant.spec.workspaceFiles || {};
   const enabledChannels = enabledPackages.filter((pkg) =>
@@ -100,6 +105,7 @@ export default async function TenantDetailPage({
           tenantName={name}
           enabledPackages={enabledPackages}
           conditions={tenant.status?.conditions}
+          canEdit={canEdit}
         />
       </section>
 
@@ -110,6 +116,7 @@ export default async function TenantDetailPage({
             tenantName={name}
             enabledChannels={enabledChannels}
             initialChannelUsers={channelUsers}
+            canEdit={canEdit}
           />
         </section>
       )}
@@ -119,7 +126,7 @@ export default async function TenantDetailPage({
         <h2 className="text-xs font-semibold uppercase tracking-wider text-text-muted mb-3">
           {t("workspaceFiles")}
         </h2>
-        <WorkspaceEditor tenantName={name} files={workspaceFiles} />
+        <WorkspaceEditor tenantName={name} files={workspaceFiles} canEdit={canEdit} />
       </section>
     </div>
   );