Add tap-to-detail on swipe cards and fix color overlay alignment

- Add onTap callback to SwipeCard using useDrag's tap detection
- Wire through SwipeReviewMode to open ListingDetailSheet on tap
- Fix color overlay misalignment: add relative to card container so
  the absolute overlay positions within the rounded card, not the
  full-width outer wrapper

frontend/src/App.tsx

@@ -625,6 +625,7 @@ function App() {
           onDecide={decide}
           onClear={clear}
           onClose={() => setShowReviewMode(false)}
+          onSelectListing={(id) => setSelectedListingId(id)}
           getDecision={getDecision}
         />
       )}

frontend/src/components/SwipeCard.tsx

@@ -7,13 +7,14 @@ import type { PropertyFeature } from '@/types';
 interface SwipeCardProps {
   feature: PropertyFeature;
   onSwipe: (direction: 'left' | 'right' | 'up') => void;
+  onTap?: () => void;
   isTop: boolean;
   stackIndex: number;
 }
 
 const SWIPE_THRESHOLD = 100;
 
-export function SwipeCard({ feature, onSwipe, isTop, stackIndex }: SwipeCardProps) {
+export function SwipeCard({ feature, onSwipe, onTap, isTop, stackIndex }: SwipeCardProps) {
   const hasSwiped = useRef(false);
   const p = feature.properties;
 
@@ -27,9 +28,14 @@ export function SwipeCard({ feature, onSwipe, isTop, stackIndex }: SwipeCardProp
   }));
 
   const bind = useDrag(
-    ({ active, movement: [mx, my], velocity: [vx, vy], direction: [dx, dy] }) => {
+    ({ active, movement: [mx, my], velocity: [vx, vy], direction: [dx, dy], tap }) => {
       if (!isTop || hasSwiped.current) return;
 
+      if (tap) {
+        onTap?.();
+        return;
+      }
+
       if (!active) {
         const isSwipeRight = mx > SWIPE_THRESHOLD || (vx > 0.5 && dx > 0);
         const isSwipeLeft = mx < -SWIPE_THRESHOLD || (vx > 0.5 && dx < 0);
@@ -81,11 +87,11 @@ export function SwipeCard({ feature, onSwipe, isTop, stackIndex }: SwipeCardProp
       }}
       className="cursor-grab active:cursor-grabbing"
     >
-      <div className="bg-background rounded-2xl border shadow-lg overflow-hidden mx-4">
+      <div className="relative bg-background rounded-2xl border shadow-lg overflow-hidden mx-4">
         {/* Color overlay */}
         {isTop && (
           <animated.div
-            className="absolute inset-0 z-10 rounded-2xl pointer-events-none"
+            className="absolute inset-0 z-10 pointer-events-none"
             style={{ backgroundColor: overlayColor, opacity: overlayOpacity }}
           />
         )}

frontend/src/components/SwipeReviewMode.tsx

@@ -9,6 +9,7 @@ interface SwipeReviewModeProps {
   onDecide: (listingId: number, decision: DecisionType, listingType?: 'RENT' | 'BUY') => void;
   onClear: (listingId: number, listingType?: 'RENT' | 'BUY') => void;
   onClose: () => void;
+  onSelectListing?: (listingId: number) => void;
   getDecision: (listingId: number, listingType?: string) => DecisionType | undefined;
 }
 
@@ -33,6 +34,7 @@ export function SwipeReviewMode({
   onDecide,
   onClear,
   onClose,
+  onSelectListing,
   getDecision,
 }: SwipeReviewModeProps) {
   // Filter to only undecided features
@@ -128,6 +130,7 @@ export function SwipeReviewMode({
                 key={feature.properties.url}
                 feature={feature}
                 onSwipe={handleSwipe}
+                onTap={() => onSelectListing?.(getListingId(feature))}
                 isTop={i === 0}
                 stackIndex={i}
               />