feat: forum rich-text editor, emoji picker, mentions, discover nav, feed, uploads, profile

Forum:
- TipTap WYSIWYG editor with full toolbar
- @emoji-mart/react emoji picker (consistent with tweets)
- @mention autocomplete with user search API
- Fix PHP 8.4 parse errors in Blade templates
- Fix thread data display (paginator items)
- Align forum page widths to max-w-5xl

Discover:
- Extract shared _nav.blade.php partial
- Add missing nav links to for-you page
- Add Following link for authenticated users

Feed/Posts:
- Post model, controllers, policies, migrations
- Feed page components (PostComposer, FeedCard, etc)
- Post reactions, comments, saves, reports, sharing
- Scheduled publishing support
- Link preview controller

Profile:
- Profile page components (ProfileHero, ProfileTabs)
- Profile API controller

Uploads:
- Upload wizard enhancements
- Scheduled publish picker
- Studio status bar and readiness checklist

resources/views/profile/partials/update-profile-information-form.blade.php

@@ -76,9 +76,31 @@
             @endif
         </div>
 
+        {{-- Posts & Feed Settings --}}
+        <div class="border-t border-gray-200 pt-6">
+            <h3 class="text-sm font-medium text-gray-900">{{ __('Posts & Feed') }}</h3>
+            <div class="mt-4 flex items-center justify-between">
+                <div>
+                    <p class="text-sm font-medium text-gray-700">{{ __('Auto-post new uploads') }}</p>
+                    <p class="text-xs text-gray-500 mt-0.5">{{ __('Automatically create a feed post when you publish new artwork.') }}</p>
+                </div>
+                <div class="flex items-center gap-2">
+                    <input type="hidden" name="auto_post_upload" value="0" />
+                    <input
+                        id="auto_post_upload"
+                        type="checkbox"
+                        name="auto_post_upload"
+                        value="1"
+                        {{ optional(auth()->user()->profile)->auto_post_upload ? 'checked' : '' }}
+                        class="rounded border-gray-300 text-indigo-600 shadow-sm focus:ring-indigo-500"
+                    />
+                    <label for="auto_post_upload" class="text-sm text-gray-600">{{ __('Enabled') }}</label>
+                </div>
+            </div>
+        </div>
+
         <div class="flex items-center gap-4">
             <x-primary-button>{{ __('Save') }}</x-primary-button>
-
             @if (session('status') === 'profile-updated')
                 <p
                     x-data="{ show: true }"

resources/views/profile/show.blade.php

@@ -0,0 +1,20 @@
+@extends('layouts.nova')
+
+@push('head')
+    @vite(['resources/js/profile.jsx'])
+    {{-- OG image (not in nova base layout) --}}
+    @if(!empty($og_image))
+        <meta property="og:image" content="{{ $og_image }}">
+    @endif
+    <meta property="og:url" content="{{ $page_canonical ?? url()->current() }}">
+    <style>
+        /* Ensure profile tab bar does not hide behind the main navbar */
+        .profile-tabs-sticky {
+            top: var(--navbar-height, 4rem);
+        }
+    </style>
+@endpush
+
+@section('content')
+    @inertia
+@endsection