feat: Add rename calls and slug preview to the HQ client

adminsite/lib/api.ts

@@ -129,6 +129,7 @@ export interface Instance {
     status: InstanceStatus;
     current_license?: string;
     relink_count: number;
+    renamed_at?: string;
     inject_failed_at?: string | null;
     notices_sent?: string[];
     created_at: string;
@@ -288,6 +289,14 @@ export interface StaffInstanceResponse {
     injection: { applicable: boolean; state?: InjectionState; failed_at?: string | null };
 }
 
+export interface RenameResult {
+    instance_id: string;
+    name: string;
+    slug: string;
+    /** Empty when APP_LOGIN_URL is unset on the server. */
+    login_url?: string;
+}
+
 // --- calls ---------------------------------------------------------------
 
 export const api = {
@@ -306,6 +315,8 @@ export const api = {
         post<Instance>("/api/instances/link", { instance_id, name }),
     createInstance: (name: string) => post<Instance>("/api/instances", { name }),
     renewInstance: (id: string) => post<License>(`/api/instances/${id}/renew`, {}),
+    renameInstance: (id: string, name: string) =>
+        put<RenameResult>(`/api/instances/${id}/name`, { name }),
     // Self-hosted Free: issue the licence on an already-linked instance.
     claimFree: (id: string) => post<License>(`/api/instances/${id}/claim-free`, {}),
     relink: (id: string, instance_id: string) =>
@@ -367,6 +378,8 @@ export const api = {
             post<License>(`/api/staff/instances/${id}/issue`, payload),
         relink: (id: string, instance_id: string) =>
             post<License>(`/api/staff/instances/${id}/relink`, { instance_id }),
+        renameInstance: (id: string, name: string) =>
+            put<RenameResult>(`/api/staff/instances/${id}/name`, { name }),
         licenses: (params?: Record<string, string>) =>
             req<License[]>(`/api/staff/licenses${params ? `?${new URLSearchParams(params)}` : ""}`),
         plans: () => req<Plan[]>("/api/staff/plans"),