Refactor contact handling and other improvments (#317)

* Refactor contact filtering and improve localization strings; enhance path trace handling

* Add localization for new CLI commands and update existing strings

* Enhance contact handling and UI updates across multiple screens
add unfiltered contact access and improve last seen resolution

* Add polling interval configuration and improve contact handling

* Reorder command constants for better organization and clarity

* Refactor contact handling by removing unnecessary mapping and improving clarity across multiple screens

* Moved RadioStatsIconButton in chat screen for improved UI consistency

* Added indicators to AppBar for channels

* Ignore contacts with self public key in contact handling

* Simplify path removal logic and clean up unused imports in path management dialog

* Enhance path hop resolution by adding distance checks to improve candidate selection accuracy

* Remove unnecessary reset of radio stats poll reference count in polling interval setter

lib/l10n/app_ru.arb

@@ -1299,5 +1299,11 @@
   "translation_composerDisabledHint": "Отправляйте сообщения на языке, в котором они были изначально набраны.",
   "translation_translateTo": "Перевести на {language}",
   "translation_translationOptions": "Варианты перевода",
-  "translation_systemLanguage": "Язык системы"
-}
+  "translation_systemLanguage": "Язык системы",
+  "scanner_linuxPairingShowPin": "Показать PIN",
+  "scanner_linuxPairingPinPrompt": "Введите PIN‑код для {deviceName} (оставьте пустым, если нет).",
+  "scanner_linuxPairingHidePin": "Скрыть PIN",
+  "scanner_linuxPairingPinTitle": "PIN‑код сопряжения Bluetooth",
+  "repeater_cliQuickDiscovery": "Обнаружить Соседей",
+  "repeater_cliQuickClockSync": "Синхронизация часов"
+}