Add per-url aliases

src/app/components/ChannelCompose.svelte

@@ -1,16 +1,18 @@
 <script lang="ts">
   import {writable} from "svelte/store"
+  import type {EventContent} from "@welshman/util"
   import {isMobile, preventDefault} from "@lib/html"
   import Icon from "@lib/components/Icon.svelte"
   import Button from "@lib/components/Button.svelte"
   import EditorContent from "@app/editor/EditorContent.svelte"
   import {makeEditor} from "@app/editor"
 
-  interface Props {
-    onSubmit: any
+  type Props = {
+    url?: string
+    onSubmit: (event: EventContent) => void
   }
 
-  const {onSubmit}: Props = $props()
+  const {onSubmit, url}: Props = $props()
 
   const autofocus = !isMobile
 
@@ -33,7 +35,7 @@
     editor.chain().clearContent().run()
   }
 
-  const editor = makeEditor({autofocus, submit, uploading, aggressive: true})
+  const editor = makeEditor({url, autofocus, submit, uploading, aggressive: true})
 </script>
 
 <form class="relative z-feature flex gap-2 p-2" onsubmit={preventDefault(submit)}>