feat: add backups feature

locales/en.json

@@ -871,6 +871,7 @@
   "admin_nav_system": "System",
   "admin_nav_tariffs": "Tariffs",
   "admin_nav_themes": "Themes",
+  "admin_nav_backups": "Backups",
   "admin_nav_settings": "Settings",
   "admin_section_stats_title": "Dashboard",
   "admin_section_stats_subtitle": "Audience, revenue, Remnawave panel, and recent payments",
@@ -890,8 +891,36 @@
   "admin_section_tariffs_subtitle": "Sales catalog, periods, packages, and limits",
   "admin_section_themes_title": "Web App themes",
   "admin_section_themes_subtitle": "Colors, fonts, and Mini App appearance",
+  "admin_section_backups_title": "Backups",
+  "admin_section_backups_subtitle": "Archives, uploads, and database/compose restore",
   "admin_section_settings_title": "App Settings",
   "admin_section_settings_subtitle": "Overrides for .env, applied instantly",
+  "admin_backups_load_failed": "Failed to load backups",
+  "admin_backups_upload_done": "Archive uploaded",
+  "admin_backups_upload_failed": "Failed to upload archive",
+  "admin_backups_select_archive": "Select an archive",
+  "admin_backups_select_target": "Select what to restore",
+  "admin_backups_restore_done": "Restore completed",
+  "admin_backups_restore_failed": "Restore failed",
+  "admin_backups_col_archive": "Archive",
+  "admin_backups_col_created": "Created",
+  "admin_backups_col_size": "Size",
+  "admin_backups_col_contents": "Contents",
+  "admin_backups_col_warnings": "Warnings",
+  "admin_backups_target_database": "Database",
+  "admin_backups_target_compose": "compose folder",
+  "admin_backups_restore_confirm": "Start restore from {name}: {components}?",
+  "admin_backups_uploading": "Uploading...",
+  "admin_backups_upload": "Upload archive",
+  "admin_backups_dir": "Directory",
+  "admin_backups_restore_title": "Restore",
+  "admin_backups_last_restore_done": "Done",
+  "admin_backups_restoring": "Restoring...",
+  "admin_backups_restore_run": "Start",
+  "admin_backups_pre_restore_snapshot": "Current compose folder was saved before replacement: {path}",
+  "admin_backups_empty": "No archives yet",
+  "admin_backups_badge_db": "DB",
+  "admin_backups_badge_compose": "Compose",
   "admin_filter_all": "All",
   "admin_filter_not_banned": "Not banned",
   "admin_filter_banned": "Banned",
@@ -975,6 +1004,7 @@
   "admin_settings_section_trial": "Trial",
   "admin_settings_section_referral": "Referral program",
   "admin_settings_section_notifications": "Notifications",
+  "admin_settings_section_backups": "Backups",
   "admin_settings_section_devices": "Devices",
   "admin_settings_section_support": "Support",
   "admin_settings_subsection_common": "Common",
@@ -1553,6 +1583,18 @@
   "admin_settings_field_support_ticket_max_subject_length_description": "Maximum number of characters in a ticket subject.",
   "admin_settings_field_support_ticket_rate_limit_per_hour_label": "Ticket limit per hour",
   "admin_settings_field_support_ticket_rate_limit_per_hour_description": "How many new tickets a user can create per hour. 0 means unlimited.",
+  "admin_settings_field_backup_enabled_label": "Backups enabled",
+  "admin_settings_field_backup_enabled_description": "The worker periodically builds a ZIP archive and sends it to Telegram.",
+  "admin_settings_field_backup_chat_id_label": "Backup chat ID",
+  "admin_settings_field_backup_chat_id_description": "Where ZIP archives are sent. Falls back to LOG_CHAT_ID when empty.",
+  "admin_settings_field_backup_thread_id_label": "Backup thread ID",
+  "admin_settings_field_backup_thread_id_description": "Optional topic/thread ID. Falls back to LOG_THREAD_ID when empty.",
+  "admin_settings_field_backup_interval_seconds_label": "Backup period (sec.)",
+  "admin_settings_field_backup_interval_seconds_description": "Default is 3600: run on the hour boundary (12:00, 13:00, etc.).",
+  "admin_settings_field_backup_local_retention_label": "Archives to keep",
+  "admin_settings_field_backup_local_retention_description": "How many latest ZIP archives to keep in data/backups on the server.",
+  "admin_settings_field_backup_compose_enabled_label": "Include compose folder",
+  "admin_settings_field_backup_compose_enabled_description": "Adds a /app/compose-source snapshot. If the folder is not mounted, the DB backup is still created.",
   "admin_settings_field_my_devices_section_enabled_label": "My Devices Section Enabled",
   "admin_settings_field_user_hwid_device_limit_label": "User HWID Device Limit",
   "admin_settings_field_user_traffic_limit_gb_label": "User Traffic Limit Gb",