Add photo carousel to listing cards and fix tap-to-detail

Backend: include first 5 photo URLs from additional_info in GeoJSON
streaming response, with fallback to photo_thumbnail.

Frontend: replace single thumbnail with swipeable embla-carousel on
compact cards. Remove window.open on card tap so clicking opens the
detail bottom sheet instead of navigating to Rightmove.

frontend/src/components/PropertyCard.tsx

@@ -1,3 +1,5 @@
+import { useState, useCallback, useEffect } from 'react';
+import useEmblaCarousel from 'embla-carousel-react';
 import { ExternalLink, Bed, Maximize2, PoundSterling, Clock, Building, Footprints, Bike, Train } from 'lucide-react';
 import { Button } from './ui/button';
 import type { PropertyProperties, POIDistanceInfo, POI } from '@/types';
@@ -84,6 +86,62 @@ function AllPOIDistances({ pois, distances }: { pois: POI[]; distances?: POIDist
     );
 }
 
+function CardCarousel({ photos }: { photos: string[] }) {
+    const [emblaRef, emblaApi] = useEmblaCarousel({ loop: true });
+    const [selectedIndex, setSelectedIndex] = useState(0);
+
+    const onSelect = useCallback(() => {
+        if (!emblaApi) return;
+        setSelectedIndex(emblaApi.selectedScrollSnap());
+    }, [emblaApi]);
+
+    useEffect(() => {
+        if (!emblaApi) return;
+        emblaApi.on('select', onSelect);
+        return () => { emblaApi.off('select', onSelect); };
+    }, [emblaApi, onSelect]);
+
+    if (photos.length <= 1) {
+        return (
+            <img
+                src={photos[0]}
+                alt="Property"
+                className="w-full h-full object-cover"
+                loading="lazy"
+            />
+        );
+    }
+
+    return (
+        <div className="relative w-full h-full" onClick={e => e.stopPropagation()}>
+            <div className="overflow-hidden h-full" ref={emblaRef}>
+                <div className="flex h-full">
+                    {photos.map((url, i) => (
+                        <div key={i} className="flex-[0_0_100%] min-w-0 h-full">
+                            <img
+                                src={url}
+                                alt={`Photo ${i + 1}`}
+                                className="w-full h-full object-cover"
+                                loading="lazy"
+                            />
+                        </div>
+                    ))}
+                </div>
+            </div>
+            <div className="absolute bottom-1 left-0 right-0 flex justify-center gap-1">
+                {photos.map((_, i) => (
+                    <div
+                        key={i}
+                        className={`w-1 h-1 rounded-full ${
+                            i === selectedIndex ? 'bg-white' : 'bg-white/40'
+                        }`}
+                    />
+                ))}
+            </div>
+        </div>
+    );
+}
+
 interface PropertyCardProps {
     property: PropertyProperties;
     variant?: 'compact' | 'full';
@@ -115,7 +173,6 @@ export function PropertyCard({
             : null;
 
     const handleClick = () => {
-        window.open(property.url, '_blank', 'noopener,noreferrer');
         onClick?.();
     };
 
@@ -127,15 +184,11 @@ export function PropertyCard({
                 }`}
                 onClick={handleClick}
             >
-                {/* Thumbnail */}
-                <div className="w-20 h-20 rounded-md overflow-hidden flex-shrink-0 bg-muted">
-                    {property.photo_thumbnail && (
-                        <img
-                            src={property.photo_thumbnail}
-                            alt="Property"
-                            className="w-full h-full object-cover"
-                        />
-                    )}
+                {/* Photo carousel */}
+                <div className="w-24 h-24 rounded-md overflow-hidden flex-shrink-0 bg-muted">
+                    {(property.photos?.length || property.photo_thumbnail) ? (
+                        <CardCarousel photos={property.photos?.length ? property.photos : [property.photo_thumbnail]} />
+                    ) : null}
                 </div>
 
                 {/* Details */}

frontend/src/components/__tests__/PropertyCard.test.tsx

@@ -68,7 +68,7 @@ describe('PropertyCard', () => {
     expect(screen.queryByText('Above avg')).not.toBeInTheDocument();
   });
 
-  it('calls onClick and opens window on click', async () => {
+  it('calls onClick on click without opening window', async () => {
     const user = userEvent.setup();
     const onClick = vi.fn();
     const openSpy = vi.spyOn(window, 'open').mockImplementation(() => null);
@@ -77,7 +77,7 @@ describe('PropertyCard', () => {
     render(<PropertyCard property={property} onClick={onClick} />);
 
     await user.click(screen.getByText(/2,500/));
-    expect(openSpy).toHaveBeenCalledWith('https://rightmove.co.uk/123', '_blank', 'noopener,noreferrer');
+    expect(openSpy).not.toHaveBeenCalled();
     expect(onClick).toHaveBeenCalled();
 
     openSpy.mockRestore();

frontend/src/types/index.ts

@@ -20,6 +20,7 @@ export interface PropertyProperties {
   available_from: string;
   last_seen: string;
   photo_thumbnail: string;
+  photos?: string[];
   price_history: PropertyPriceHistory[];
   listing_type?: 'RENT' | 'BUY';
   poi_distances?: POIDistanceInfo[];