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_ja.arb

@@ -2104,4 +2104,4 @@
   "scanner_linuxPairingPinPrompt": "{deviceName}のPINを入力してください（なしの場合は空欄のまま）。",
   "repeater_cliQuickClockSync": "クロック同期",
   "repeater_cliQuickDiscovery": "近隣を発見する"
-}
+}