feat(ui,server): surface active instance service URLs in About settings (#2669)

Show the running instance's local server URL and tunnel URL (when a
tunnel is active) as labeled, click-to-open buttons on the About page.
/api/system/info now reports the instance port and tunnel URL, resolved
lazily from the tunnel runtime so each Git-worktree instance identifies
itself in the UI without parsing terminal output.

Refs OPE-194

packages/ui/src/lib/i18n/messages/pl.settings.ts

@@ -722,6 +722,9 @@ export const settingsDict = {
   'settings.openchamber.about.actions.updateToVersion': 'Aktualizuj do wersji {version}',
   'settings.openchamber.about.field.version': 'Wersja',
   'settings.openchamber.about.field.openCodeVersion': 'Wersja OpenCode',
+  'settings.openchamber.about.field.instanceUrls': 'Adresy URL instancji',
+  'settings.openchamber.about.field.applicationUrl': 'Aplikacja',
+  'settings.openchamber.about.field.tunnelUrl': 'Tunel',
   'settings.openchamber.about.state.checking': 'Sprawdzanie...',
   'settings.openchamber.about.state.upToDate': 'Aktualna wersja',
   'settings.openchamber.about.state.unknown': 'nieznane',