fix: Derive the rename unwind deadline at its use site

adminsite/app/(staff)/staff/instances/[id]/page.tsx

@@ -38,6 +38,12 @@ export default function StaffInstancePage() {
 
     const inj = data.injection.state ? INJECTION[data.injection.state] : undefined;
     const current = data.licenses.find((l) => !l.superseded_by);
+    // A cloud placeholder has no control-plane row yet, so there is no host to
+    // move and nothing to rename — the panel's wording and its control are both
+    // read from this one answer rather than from the deployment alone, which is
+    // how they came to contradict each other.
+    const movesHost = data.instance.deployment === "cloud" && !data.instance.placeholder;
+    const cloudPlaceholder = data.instance.deployment === "cloud" && data.instance.placeholder;
 
     return (
         <div className="grid gap-8">
@@ -86,23 +92,31 @@ export default function StaffInstancePage() {
              * fixing a name on someone's behalf must not spend their next 24
              * hours.
              */}
-            <Panel title="Name" meta={data.instance.deployment === "cloud" ? "Moves the address" : "Label only"}>
-                {/*
-                 * Keyed on the instance so a success note cannot follow staff
-                 * from one instance page to the next — the element stays
-                 * mounted across that navigation.
-                 */}
-                <RenamePanel
-                    key={data.instance.instance_id}
-                    movesHost={data.instance.deployment === "cloud" && !data.instance.placeholder}
-                    currentName={data.instance.name}
-                    currentSlug={data.instance.slug ?? ""}
-                    onRename={async (name) => {
-                        const res = await api.staff.renameInstance(data.instance.instance_id, name);
-                        qc.invalidateQueries({ queryKey: ["staff-instance", id] });
-                        return res;
-                    }}
-                />
+            <Panel title="Name" meta={movesHost ? "Moves the address" : "Label only"}>
+                {cloudPlaceholder ? (
+                    // The API refuses this with a 409, so offering the control
+                    // would only be a form that cannot succeed.
+                    <p className="text-[0.85rem] text-ink-3">
+                        This instance is not provisioned yet. Its name is set when the checkout provisions it, and it can be renamed after that.
+                    </p>
+                ) : (
+                    /*
+                     * Keyed on the instance so a success note cannot follow staff
+                     * from one instance page to the next — the element stays
+                     * mounted across that navigation.
+                     */
+                    <RenamePanel
+                        key={data.instance.instance_id}
+                        movesHost={movesHost}
+                        currentName={data.instance.name}
+                        currentSlug={data.instance.slug ?? ""}
+                        onRename={async (name) => {
+                            const res = await api.staff.renameInstance(data.instance.instance_id, name);
+                            qc.invalidateQueries({ queryKey: ["staff-instance", id] });
+                            return res;
+                        }}
+                    />
+                )}
             </Panel>
 
             <EntitlementSection instanceId={data.instance.instance_id} deployment={data.instance.deployment} />