feat(devices): inline rename UI for connected HWID devices

Pairs with the bot commit that adds the user_device_aliases table.
Surfaces the new local_name field on the existing devices list in
both the user-facing subscription page and the admin user-detail
page, with the same inline-edit pattern in both places.

User-side (src/pages/Subscription.tsx):
- pencil button next to each device row toggles edit mode
- input is focused automatically, capped at 64 chars (matches the
  backend ALIAS_MAX_LENGTH and DB column width)
- Enter saves, Escape cancels, empty input clears the alias
- display priority: local_name → device_model → platform
- works identically in classic / single-tariff / multi-tariff —
  subscriptionId is forwarded as a query param like every other
  device-management endpoint already does

Admin-side (src/pages/AdminUserDetail.tsx):
- same pencil + inline input pattern, admin acts on behalf of the
  user. notify.success on save, loadDevices() refresh.

API (src/api/subscription.ts + src/api/adminUsers.ts):
- new renameDevice(hwid, name, subscriptionId?) on subscriptionApi
- new renameUserDevice(userId, hwid, name) on adminUsersApi
- existing getDevices/getUserDevices contracts widened with
  local_name?: string | null on the returned device shape

Locales (src/locales/ru.json):
- subscription.renameDevice / .renameDeviceSave / .renameDeviceCancel
  / .renameDevicePlaceholder / .deviceRenamed
- admin.users.detail.devices.rename / .renameSave / .renamed

src/api/adminUsers.ts

@@ -719,7 +719,13 @@ export const adminUsersApi = {
     userId: number,
     subscriptionId?: number,
   ): Promise<{
-    devices: { hwid: string; platform: string; device_model: string; created_at: string | null }[];
+    devices: {
+      hwid: string;
+      platform: string;
+      device_model: string;
+      created_at: string | null;
+      local_name?: string | null;
+    }[];
     total: number;
     device_limit: number;
   }> => {
@@ -729,6 +735,19 @@ export const adminUsersApi = {
     return response.data;
   },
 
+  // Set / clear local device alias on behalf of the user (admin override).
+  renameUserDevice: async (
+    userId: number,
+    hwid: string,
+    name: string | null,
+  ): Promise<{ hwid: string; local_name: string | null }> => {
+    const response = await apiClient.patch(
+      `/cabinet/admin/users/${userId}/devices/${encodeURIComponent(hwid)}/name`,
+      { name },
+    );
+    return response.data;
+  },
+
   // Delete single device
   deleteUserDevice: async (
     userId: number,

src/api/subscription.ts

@@ -264,6 +264,7 @@ export const subscriptionApi = {
       platform: string;
       device_model: string;
       created_at: string | null;
+      local_name?: string | null;
     }>;
     total: number;
     device_limit: number;
@@ -275,6 +276,27 @@ export const subscriptionApi = {
     return response.data;
   },
 
+  /**
+   * Persist a user-local alias for a device. Pass an empty/null `name` to
+   * clear the alias. Returns the final `local_name` after server-side
+   * normalization (trimmed + length-capped).
+   *
+   * Scope is per-(user, hwid), so the same alias appears across all of
+   * the user's subscriptions in multi-tariff mode.
+   */
+  renameDevice: async (
+    hwid: string,
+    name: string | null,
+    subscriptionId?: number,
+  ): Promise<{ hwid: string; local_name: string | null }> => {
+    const response = await apiClient.patch(
+      `/cabinet/subscription/devices/${encodeURIComponent(hwid)}/name`,
+      { name },
+      withSubId(subscriptionId),
+    );
+    return response.data;
+  },
+
   deleteDevice: async (
     hwid: string,
     subscriptionId?: number,