feat(ui): scaffold SvelteKit app with Tailwind v4, adapter-node, zinc/amber theme

ui/.env.example

@@ -0,0 +1,13 @@
+# libnovel UI — environment variables
+# Copy to .env and adjust; do NOT commit with real secrets.
+
+# Public URL of the scraper API (used by SvelteKit server-side load functions)
+# In docker-compose this is the internal service name
+SCRAPER_API_URL=http://localhost:8080
+
+# Public URL of PocketBase (used by SvelteKit server-side load functions)
+POCKETBASE_URL=http://localhost:8090
+
+# Public-facing MinIO URL (used to rewrite presigned URLs for the browser)
+# In dev this is localhost; in prod set to your MinIO public domain
+PUBLIC_MINIO_PUBLIC_URL=http://localhost:9000