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/locales/ru.json

@@ -492,6 +492,11 @@
     "confirmDeleteAllDevices": "Удалить все устройства?",
     "deviceDeleted": "Устройство удалено",
     "allDevicesDeleted": "Все устройства удалены",
+    "renameDevice": "Переименовать",
+    "renameDeviceSave": "Сохранить",
+    "renameDeviceCancel": "Отмена",
+    "renameDevicePlaceholder": "Имя устройства",
+    "deviceRenamed": "Имя устройства обновлено",
     "platform": "Платформа",
     "model": "Модель",
     "connectedAt": "Подключено",
@@ -3581,7 +3586,10 @@
           "none": "Нет подключённых устройств",
           "resetAll": "Сбросить все",
           "deleted": "Устройство удалено",
-          "allDeleted": "Все устройства сброшены"
+          "allDeleted": "Все устройства сброшены",
+          "rename": "Переименовать",
+          "renameSave": "Сохранить",
+          "renamed": "Имя устройства обновлено"
         },
         "referral": {
           "title": "Реферальная программа",