fix: clarify popup text and form fields in import UI - fix Italian copy in nitro editor, use shared CloneSource interface, make nitro/icon fields optional

src/app/admin/import/clone/import-clone-client.tsx

@@ -28,20 +28,12 @@ import {
 } from "@/components/ui/select";
 import { adminFetch } from "@/lib/admin-fetch";
 import { HABBO_GAMEDATA_HOTELS } from "@/lib/habbo-gamedata-hotel";
+import type { CloneSource } from "@/lib/services/clone-sources";
 import { runSseImport } from "@/lib/sse-client";
 import { cn } from "@/lib/utils";
 
 // ── Types ─────────────────────────────────────────────────────────────────────
 
-interface CloneSource {
-	id: string;
-	name: string;
-	furnidataUrl: string;
-	nitroBaseUrl: string;
-	iconBaseUrl: string;
-	hotel: string;
-}
-
 interface FurniItem {
 	classname: string;
 	name: string;
@@ -80,6 +72,9 @@ function SourceForm({ initial, onSave, onCancel, saving }: SourceFormProps) {
 	const [furnidataUrl, setFurnidataUrl] = useState(initial?.furnidataUrl ?? "");
 	const [nitroBaseUrl, setNitroBaseUrl] = useState(initial?.nitroBaseUrl ?? "");
 	const [iconBaseUrl, setIconBaseUrl] = useState(initial?.iconBaseUrl ?? "");
+	const [sourceSwfBaseUrl, setSourceSwfBaseUrl] = useState(
+		initial?.sourceSwfBaseUrl ?? "",
+	);
 	const [hotel, setHotel] = useState(initial?.hotel ?? "");
 
 	async function handleSubmit(e: React.FormEvent) {
@@ -90,6 +85,7 @@ function SourceForm({ initial, onSave, onCancel, saving }: SourceFormProps) {
 			furnidataUrl,
 			nitroBaseUrl,
 			iconBaseUrl,
+			sourceSwfBaseUrl,
 			hotel,
 		});
 	}
@@ -119,13 +115,16 @@ function SourceForm({ initial, onSave, onCancel, saving }: SourceFormProps) {
 					placeholder="Nitro base URL (e.g. https://x/bundled/furniture)"
 					value={nitroBaseUrl}
 					onChange={(e) => setNitroBaseUrl(e.target.value)}
-					required
 				/>
 				<Input
 					placeholder="Icon base URL (e.g. https://x/icons)"
 					value={iconBaseUrl}
 					onChange={(e) => setIconBaseUrl(e.target.value)}
-					required
+				/>
+				<Input
+					placeholder="SWF base URL (optional, for non-Habbo sources)"
+					value={sourceSwfBaseUrl}
+					onChange={(e) => setSourceSwfBaseUrl(e.target.value)}
 				/>
 				<Select value={hotel} onValueChange={setHotel}>
 					<SelectTrigger>