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/es.settings.ts

@@ -431,6 +431,9 @@ export const settingsDict = {
   "settings.openchamber.about.title": "Acerca de OpenChamber",
   "settings.openchamber.about.field.version": "Versión",
   "settings.openchamber.about.field.openCodeVersion": "Versión de OpenCode",
+  "settings.openchamber.about.field.instanceUrls": "URLs de la instancia",
+  "settings.openchamber.about.field.applicationUrl": "Aplicación",
+  "settings.openchamber.about.field.tunnelUrl": "Túnel",
   "settings.openchamber.about.state.checking": "Comprobando...",
   "settings.openchamber.about.state.upToDate": "Actualizado",
   "settings.openchamber.about.state.unknown": "desconocido",