feat: mark already-added images as disabled in EntityPicker

web/src/routes/projects/+page.svelte

@@ -33,17 +33,22 @@
 		imagePickerLoading = true;
 		try {
 			const registries = await api.listRegistries();
+			// Collect existing project images to mark as already added.
+			const existingImages = new Set(projects.map(p => p.image.toLowerCase()));
 			const items: EntityPickerItem[] = [];
 			for (const reg of registries) {
 				if (!reg.owner) continue;
 				try {
 					const images = await api.listRegistryImages(reg.id);
 					for (const img of images) {
+						const alreadyAdded = existingImages.has(img.full_ref.toLowerCase());
 						items.push({
 							value: JSON.stringify({ full_ref: img.full_ref, registryName: reg.name }),
 							label: img.full_ref,
-							description: reg.name,
-							group: reg.name
+							description: alreadyAdded ? undefined : reg.name,
+							group: reg.name,
+							disabled: alreadyAdded,
+							disabledHint: alreadyAdded ? 'Already added' : undefined
 						});
 					}
 				} catch {