feat: news crop editor — natural drag, zoom slider, force-dynamic page

- Rewrite crop preview: drag moves image naturally (inverted focal)
- Add zoom slider (1x-3x) + mouse wheel zoom
- Apply imageZoom on user side (featured, compact, modal)
- Force-dynamic on main page to prevent stale cache

src/components/ui/NewsModal.tsx

@@ -82,7 +82,10 @@ export function NewsModal({ item, onClose }: NewsModalProps) {
               fill
               sizes="(min-width: 768px) 672px, 100vw"
               className="object-cover"
-              style={{ objectPosition: `${item.imageFocalX ?? 50}% ${item.imageFocalY ?? 50}%` }}
+              style={{
+                objectPosition: `${item.imageFocalX ?? 50}% ${item.imageFocalY ?? 50}%`,
+                transform: `scale(${item.imageZoom ?? 1})`,
+              }}
             />
             <div className="absolute inset-0 bg-gradient-to-t from-[#0a0a0a] via-transparent to-transparent" />
           </div>