Refactor avatar components, add space edit form

src/app/components/RelayIcon.svelte

@@ -0,0 +1,21 @@
+<script lang="ts">
+  import {deriveRelay} from "@welshman/app"
+  import RemoteControllerMinimalistic from "@assets/icons/remote-controller-minimalistic.svg?dataurl"
+  import ImageIcon from "@lib/components/ImageIcon.svelte"
+
+  type Props = {
+    url: string
+    size?: number
+    class?: string
+  }
+
+  const {url, size = 7, ...props}: Props = $props()
+
+  const relay = deriveRelay(url)
+</script>
+
+<ImageIcon
+  {size}
+  src={$relay?.icon || RemoteControllerMinimalistic}
+  alt="Relay image"
+  class={props.class} />