soulseek, extracted from the platform as a plugin

Seventh plugin out, and the first that was already dead. Soulseek had been
switched off since 2026-08-13: hono.ts had the router import and its mount
commented out, so createSidecarProxy never ran, registerProxiedPrefix was never
called, the slskd:server announcement fired into a void, and officer-slskd was
not in the ecosystem at all. The permission entry had been reduced to api: [],
which is why assertPermissionTotality was satisfied and the server booted
clean. The UI rendered perfectly and every request 404'd.

So this is a resurrection as well as a move.

The mount is now /api/soulseek, derived via mountPrefix from the appName — all
47 frontend call sites repointed from /slskd/. The credential key in
service_connections stays 'slskd': it names the daemon, not the route. Those
two strings differ on purpose and conflating them reads the wrong row.

The connection stays in core service_connections, as transmission does, so
'slskd' remains in a platform union this plugin cannot extend. Recorded in
PLUGIN.md. Unlike transmission this plugin does own a schema: favourites and
the two halves of the cached browse tree, which slskd has no concept of. Those
three tables had been dropped from the drizzle barrel, so bun db:push would
have deleted them on any server holding data.

313 palette classes converted to the semantic tone set, including a shared
PHASE_TONE the three transfer views previously each copied.

web/UserMenu.tsx

@@ -0,0 +1,59 @@
+import { Link } from 'react-router';
+import { toast } from 'sonner';
+import { FolderOpen, Star, StarOff } from 'lucide-react';
+import {
+  DropdownMenu,
+  DropdownMenuTrigger,
+  DropdownMenuContent,
+  DropdownMenuItem,
+  DropdownMenuLabel,
+  DropdownMenuSeparator,
+} from '@/components/ui/dropdown-menu';
+import { useSoulseekFavorites } from './useSoulseekFavorites';
+import { soulseekUserPath } from './shared';
+
+// The peer dropdown, shared by search results and downloads: click a username anywhere in the workspace
+// and act on that peer. Opening a peer is a real link to /soulseek/users?user=<name> — the Users section
+// still owns the lookup and the cached share tree, it just reads who from the URL. Favouriting is a
+// mutation, so it stays a menu item that acts rather than navigates.
+
+type UserMenuProps = { username: string };
+
+export const UserMenu = ({ username }: UserMenuProps) => {
+  const { isFavorite, toggle } = useSoulseekFavorites();
+  const favorited = isFavorite(username);
+
+  const toggleFavorite = () => {
+    toggle(username);
+    toast.success(favorited ? `Removed ${username} from favorites` : `Added ${username} to favorites`);
+  };
+
+  return (
+    <DropdownMenu>
+      <DropdownMenuTrigger asChild>
+        <button
+          type="button"
+          title={`Actions for ${username}`}
+          className="min-w-0 max-w-full truncate rounded text-sm font-medium text-foreground underline decoration-dotted decoration-muted-foreground underline-offset-4 outline-none transition hover:decoration-foreground focus-visible:ring-2 focus-visible:ring-primary/40"
+        >
+          {username}
+          {favorited && <Star className="ml-1.5 inline h-3 w-3 fill-warning align-baseline text-warning" />}
+        </button>
+      </DropdownMenuTrigger>
+      <DropdownMenuContent align="start" className="w-56">
+        <DropdownMenuLabel className="truncate">{username}</DropdownMenuLabel>
+        <DropdownMenuSeparator />
+        <DropdownMenuItem asChild>
+          <Link to={soulseekUserPath(username)}>
+            <FolderOpen className="mr-2 h-4 w-4" />
+            View profile &amp; shares
+          </Link>
+        </DropdownMenuItem>
+        <DropdownMenuItem onSelect={toggleFavorite}>
+          {favorited ? <StarOff className="mr-2 h-4 w-4" /> : <Star className="mr-2 h-4 w-4" />}
+          {favorited ? 'Remove from favorites' : 'Add user to favorites'}
+        </DropdownMenuItem>
+      </DropdownMenuContent>
+    </DropdownMenu>
+  );
+};