feat: add options/map flow, dev seed, and artwork fixes

Options page, Kakao map with florist order message, dev tooling, and
create/message dummy gating — without secrets in .env.example.

Co-authored-by: 이지은 <ijieun@ijieun-ui-MacBookPro.local>
Co-authored-by: Cursor <cursoragent@cursor.com>

src/lib/components/ui/Artwork/Artwork.svelte

@@ -3,7 +3,12 @@
 	import Vase from './Vase.svelte';
 	import DescriptionCard from './DescriptionCard.svelte';
 
-	let { title = 'Title', description = 'Description Description Description' } = $props();
+	let {
+		title = 'Title',
+		description = 'Description Description Description',
+		/** options Continue 이후 확정된 꽃다발만 전달 (그 전에는 null → Vase) */
+		imageSrc = null
+	} = $props();
 </script>
 
 <section
@@ -13,7 +18,17 @@
 	<div
 		class="mx-auto flex w-full max-w-100 flex-row items-center gap-12 px-6 py-5 lg:flex-1 lg:flex-col lg:items-center lg:justify-center lg:gap-10 lg:px-6 lg:py-12"
 	>
-		<Vase />
+		{#if imageSrc}
+			<div class="mx-auto w-full max-w-24 shrink-0 overflow-hidden sm:max-w-28 lg:max-w-75">
+				<img
+					src={imageSrc}
+					alt="Selected bouquet"
+					class="aspect-[3/4] h-auto w-full object-cover"
+				/>
+			</div>
+		{:else}
+			<Vase />
+		{/if}
 		<DescriptionCard {title} {description} />
 	</div>
 </section>