feat(webui): show current vault mode in setup

webui/src/views/Setup.svelte

@@ -4,28 +4,23 @@
   import { i18n } from "../i18n";
   import { useNavigate } from "svelte-navigator";
   import api from "../lib/api";
+  import type { VaultBlobMode } from "@upnd/upend/api";
+  import { onMount } from "svelte";
   const navigate = useNavigate();
 
-  let mode: "Flat" | "DepthFirst" | "Mirror" | "Incoming" = undefined;
+  let mode: VaultBlobMode = undefined;
 
   async function submitOptions() {
-    const blob_mode = {};
-    blob_mode[mode] = null;
-
-    const optionResponse = await fetch("/api/options", {
-      method: "PUT",
-      headers: {
-        "Content-Type": "application/json",
-      },
-      body: JSON.stringify({ blob_mode }),
-    });
-    if (!optionResponse.ok) {
-      throw new Error("Failed to set options");
-    }
+    await api.setVaultOptions({ blob_mode: mode });
     await api.refreshVault();
     navigate("/");
   }
 
+  onMount(async () => {
+    const options = await api.getVaultOptions();
+    mode = options.blob_mode;
+  });
+
   updateTitle("Initial Setup");
 </script>