feat: import places from Google Maps URLs — closes #141

Paste a Google Maps URL into the place search bar to automatically
import name, coordinates, and address. No API key required.

Supported URL formats:
- Short URLs: maps.app.goo.gl/..., goo.gl/maps/...
- Full URLs: google.com/maps/place/.../@lat,lng
- Data params: !3dlat!4dlng embedded coordinates

Server resolves short URL redirects and extracts coordinates.
Reverse geocoding via Nominatim provides name and address.

client/src/i18n/translations/de.ts

@@ -645,6 +645,7 @@ const de: Record<string, string | { name: string; category: string }[]> = {
   'places.addPlace': 'Ort/Aktivität hinzufügen',
   'places.importGpx': 'GPX importieren',
   'places.gpxImported': '{count} Orte aus GPX importiert',
+  'places.urlResolved': 'Ort aus URL importiert',
   'places.gpxError': 'GPX-Import fehlgeschlagen',
   'places.assignToDay': 'Zu welchem Tag hinzufügen?',
   'places.all': 'Alle',

client/src/i18n/translations/en.ts

@@ -645,6 +645,7 @@ const en: Record<string, string | { name: string; category: string }[]> = {
   'places.addPlace': 'Add Place/Activity',
   'places.importGpx': 'Import GPX',
   'places.gpxImported': '{count} places imported from GPX',
+  'places.urlResolved': 'Place imported from URL',
   'places.gpxError': 'GPX import failed',
   'places.assignToDay': 'Add to which day?',
   'places.all': 'All',