Improve empty feed state with icon and discover CTA

Redesign FeedEmptyState with a centered icon, cleaner layout, and
two actionable buttons for the follows tab: 'Discover people to
follow' linking to /packs, and 'Browse the Global feed' to switch
tabs. Other call sites are unaffected (new props are optional).

src/components/Feed.tsx

@@ -327,10 +327,11 @@ export function Feed({ kinds, tagFilters, header, hideCompose, emptyMessage, fee
               message={
                 emptyMessage ?? (
                   activeTab === 'follows'
-                    ? 'No posts yet. Follow some people to see their content here.'
+                    ? 'Your feed is empty. Follow some people to see their posts here.'
                     : 'No posts found. Check your relay connections or come back soon.'
                 )
               }
+              showDiscover={!emptyMessage && activeTab === 'follows'}
               onSwitchToGlobal={
                 activeTab === 'follows' && showGlobalFeed
                   ? () => handleSetActiveTab('global')

src/components/FeedEmptyState.tsx

@@ -1,3 +1,6 @@
+import { Link } from 'react-router-dom';
+import { Users } from 'lucide-react';
+import { Button } from '@/components/ui/button';
 import { cn } from '@/lib/utils';
 
 interface FeedEmptyStateProps {
@@ -5,31 +8,45 @@ interface FeedEmptyStateProps {
   message: string;
   /** Called when the user clicks "Switch to Global". Omit to hide the button. */
   onSwitchToGlobal?: () => void;
+  /** Show a "Discover people" link to /packs. */
+  showDiscover?: boolean;
   className?: string;
 }
 
 /**
  * Consistent empty state for Follows/Global feed tabs across all feed pages.
  *
- * - Follows tab: pass `onSwitchToGlobal` to render a "Switch to Global" CTA.
- * - Global tab: omit `onSwitchToGlobal`; the message should guide the user
+ * - Follows tab: pass `onSwitchToGlobal` and `showDiscover` to render CTAs.
+ * - Global tab: omit both; the message should guide the user
  *   to check their relay connections.
  */
 export function FeedEmptyState({
   message,
   onSwitchToGlobal,
+  showDiscover,
   className,
 }: FeedEmptyStateProps) {
   return (
-    <div className={cn('py-16 px-8 text-center space-y-3', className)}>
-      <p className="text-muted-foreground break-all">{message}</p>
-      {onSwitchToGlobal && (
-        <button
-          className="text-sm text-primary hover:underline"
-          onClick={onSwitchToGlobal}
-        >
-          Switch to Global
-        </button>
+    <div className={cn('py-20 px-8 flex flex-col items-center text-center', className)}>
+      <div className="size-12 rounded-full bg-muted flex items-center justify-center mb-4">
+        <Users className="size-6 text-muted-foreground" />
+      </div>
+
+      <p className="text-muted-foreground max-w-xs">{message}</p>
+
+      {(showDiscover || onSwitchToGlobal) && (
+        <div className="flex flex-col gap-2 mt-5 w-full max-w-xs">
+          {showDiscover && (
+            <Button asChild className="rounded-full">
+              <Link to="/packs">Discover people to follow</Link>
+            </Button>
+          )}
+          {onSwitchToGlobal && (
+            <Button variant="ghost" className="rounded-full" onClick={onSwitchToGlobal}>
+              Browse the Global feed
+            </Button>
+          )}
+        </div>
       )}
     </div>
   );