feat(spaces): add drag handle indicator

src/routes/spaces/+page.svelte

@@ -8,6 +8,7 @@
   import {relays, createSearch} from "@welshman/app"
   import {createScroller} from "@lib/html"
   import {fly} from "@lib/transition"
+  import MenuDots from "@assets/icons/menu-dots-2.svg?dataurl"
   import Widget from "@assets/icons/widget-4.svg?dataurl"
   import AddCircle from "@assets/icons/add-circle.svg?dataurl"
   import Magnifier from "@assets/icons/magnifier.svg?dataurl"
@@ -256,6 +257,10 @@
                 ondragover={e => onDragOver(e, url)}
                 ondrop={e => onDrop(e, url)}
                 ondragend={onDragEnd}>
+                <div
+                  class="hidden cursor-grab p-1 opacity-0 transition-opacity hover:text-base-content group-hover:opacity-100 sm:flex">
+                  <Icon icon={MenuDots} class="text-base-content/50" />
+                </div>
                 <Button
                   class="card2 bg-alt shadow-md transition-all hover:shadow-lg hover:dark:brightness-[1.1] w-full relative"
                   onclick={() => openSpace(url)}>