feat: better but not perfect misskey auth support

frontend/src/routes/auth/login/+page.svelte

@@ -69,9 +69,6 @@
       </ListGroup>
       <Modal header="Pick an instance" isOpen={modalOpen} toggle={toggleModal}>
         <ModalBody>
-          <p>
-            <strong>Note:</strong> Misskey (and derivatives) are not supported yet, sorry.
-          </p>
           <Input placeholder="Instance (e.g. mastodon.social)" bind:value={instance} />
           {#if error}
             <div class="mt-2">

frontend/src/routes/auth/login/misskey/[instance]/+page.server.ts

@@ -8,8 +8,7 @@ export const load = (async ({ url, params }) => {
       method: "POST",
       body: {
         instance: params.instance,
-        code: url.searchParams.get("code"),
-        state: url.searchParams.get("state"),
+        code: url.searchParams.get("token"),
       },
     });
 

frontend/src/routes/settings/auth/+page.svelte

@@ -128,9 +128,6 @@
     </div>
     <Modal header="Pick an instance" isOpen={fediLinkModalOpen} toggle={toggleFediLinkModal}>
       <ModalBody>
-        <p>
-          <strong>Note:</strong> Misskey (and derivatives) are not supported yet, sorry.
-        </p>
         <Input placeholder="Instance (e.g. mastodon.social)" bind:value={instance} />
         {#if error}
           <div class="mt-2">