feat: move user action buttons to detail page and fix full delete

- Add fullDeleteUser API method calling DELETE /admin/users/{id}/full
- Add Reset trial, Reset subscription, Disable, Delete buttons to AdminUserDetail info tab
- Implement inline confirm pattern (click → "Are you sure?" → execute, 3s timeout)
- Delete now calls /full endpoint removing user from bot DB and Remnawave panel
- Remove UserActionsMenu dropdown, ConfirmationModal and related code from AdminUsers list
- Update delete confirmation text in ru/en locales to reflect full deletion

src/locales/en.json

@@ -1808,7 +1808,7 @@
         },
         "confirmDelete": {
           "title": "Delete user?",
-          "message": "Are you sure? This action is irreversible. All user data will be deleted."
+          "message": "Are you sure? This action is irreversible. The user will be fully deleted from the bot and from the Remnawave panel."
         },
         "confirmResetTrial": {
           "title": "Reset trial?",
@@ -1848,6 +1848,10 @@
           "subscription": "• Subscription purchase prohibited",
           "reason": "Reason"
         },
+        "actions": {
+          "title": "Actions",
+          "areYouSure": "Are you sure?"
+        },
         "subscription": {
           "current": "Current subscription",
           "tariff": "Tariff",