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/api/client.ts

@@ -179,6 +179,7 @@ export const mapsApi = {
   details: (placeId: string, lang?: string) => apiClient.get(`/maps/details/${encodeURIComponent(placeId)}`, { params: { lang } }).then(r => r.data),
   placePhoto: (placeId: string, lat?: number, lng?: number, name?: string) => apiClient.get(`/maps/place-photo/${encodeURIComponent(placeId)}`, { params: { lat, lng, name } }).then(r => r.data),
   reverse: (lat: number, lng: number, lang?: string) => apiClient.get('/maps/reverse', { params: { lat, lng, lang } }).then(r => r.data),
+  resolveUrl: (url: string) => apiClient.post('/maps/resolve-url', { url }).then(r => r.data),
 }
 
 export const budgetApi = {