fix(places): pin the image and website URL fields on the way in

image_url and website were bare strings in the contract, and the create/update
bodies are open records, so the Zod pipe never looked at either. Both leave the
database for something that treats them as a URL: the thumbnail is interpolated
into hand-built marker HTML, and the homepage is handed to window.open, where a
javascript: value would run in this origin rather than opening a page.

Both are allow-listed on the way in now, next to hexColorSchema and checked in
the handler the way validateRouteColor already is, on all three write surfaces
so REST, the plugin RPC and MCP agree on what they accept. The entity schemas
stay open: rows written before this still have to round-trip.

safeHttpUrl covers the read side for exactly those rows, the same split
safeHexColor uses, and the window.open calls it guards pick up
noopener,noreferrer while they are being touched.

client/src/mobile/screens/trip/sheets/MPlaceSheet.tsx

@@ -17,6 +17,7 @@ import PlaceRating from '../../../../components/shared/StarRating'
 import TrackColorPicker from '../../../../components/shared/TrackColorPicker'
 import { resolveTrackColor, inheritedTrackColor } from '../../../../components/Map/trackColors'
 import { avatarSrc } from '../../../../utils/avatarSrc'
+import { safeHttpUrl } from '../../../../utils/safeUrl'
 import { openFile } from '../../../../utils/fileDownload'
 import { getNavigationTargets, openNavigationTarget } from '../../../../components/Planner/placeNavigation'
 import { NavigationMenu } from '../../../../components/shared/NavigationMenu'
@@ -527,9 +528,9 @@ export default function MPlaceSheet({ planner, shell }: MTripSheetsProps) {
                   <MapIcon size={15} strokeWidth={2} />
                 </ActionCircle>
               )}
-              {place.website && (
+              {safeHttpUrl(place.website) && (
                 <ActionCircle
-                  onClick={() => window.open(place.website!, '_blank', 'noopener,noreferrer')}
+                  onClick={() => window.open(safeHttpUrl(place.website)!, '_blank', 'noopener,noreferrer')}
                   label={t('inspector.website')}
                 >
                   <ExternalLink size={15} strokeWidth={2} />