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/js/components/forum/ThreadRow.jsx

@@ -0,0 +1,116 @@
+import React from 'react'
+
+export default function ThreadRow({ thread, isFirst = false }) {
+  const id        = thread?.topic_id ?? thread?.id ?? 0
+  const title     = thread?.topic ?? thread?.title ?? 'Untitled'
+  const slug      = thread?.slug ?? slugify(title)
+  const excerpt   = thread?.discuss ?? ''
+  const posts     = thread?.num_posts ?? 0
+  const author    = thread?.uname ?? 'Unknown'
+  const lastUpdate = thread?.last_update ?? thread?.post_date
+  const isPinned  = thread?.is_pinned ?? false
+
+  const href = `/forum/thread/${id}-${slug}`
+
+  return (
+    <a
+      href={href}
+      className={[
+        'group flex items-start gap-4 px-5 py-4 transition-colors hover:bg-white/[0.03]',
+        !isFirst && 'border-t border-white/[0.06]',
+      ].filter(Boolean).join(' ')}
+    >
+      {/* Icon */}
+      <div className="mt-0.5 flex h-9 w-9 shrink-0 items-center justify-center rounded-lg bg-sky-500/10 text-sky-400 group-hover:bg-sky-500/15 transition-colors">
+        {isPinned ? (
+          <svg width="16" height="16" viewBox="0 0 24 24" fill="currentColor">
+            <path d="M16 12V4h1V2H7v2h1v8l-2 2v2h5.2v6h1.6v-6H18v-2z" />
+          </svg>
+        ) : (
+          <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round">
+            <path d="M21 15a2 2 0 01-2 2H7l-4 4V5a2 2 0 012-2h14a2 2 0 012 2z" />
+          </svg>
+        )}
+      </div>
+
+      {/* Content */}
+      <div className="min-w-0 flex-1">
+        <div className="flex items-center gap-2">
+          <h3 className="truncate text-sm font-semibold text-white group-hover:text-sky-300 transition-colors">
+            {title}
+          </h3>
+          {isPinned && (
+            <span className="shrink-0 rounded-full bg-amber-500/15 px-2 py-0.5 text-[10px] font-medium text-amber-300">
+              Pinned
+            </span>
+          )}
+        </div>
+
+        {excerpt && (
+          <p className="mt-0.5 truncate text-xs text-white/40">
+            {stripHtml(excerpt).slice(0, 180)}
+          </p>
+        )}
+
+        <div className="mt-1.5 flex flex-wrap items-center gap-3 text-xs text-white/35">
+          <span className="flex items-center gap-1">
+            <svg width="12" height="12" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round">
+              <path d="M20 21v-2a4 4 0 00-4-4H8a4 4 0 00-4 4v2" />
+              <circle cx="12" cy="7" r="4" />
+            </svg>
+            {author}
+          </span>
+          <span className="flex items-center gap-1">
+            <svg width="12" height="12" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round">
+              <path d="M21 15a2 2 0 01-2 2H7l-4 4V5a2 2 0 012-2h14a2 2 0 012 2z" />
+            </svg>
+            {posts} {posts === 1 ? 'reply' : 'replies'}
+          </span>
+          {lastUpdate && (
+            <span className="flex items-center gap-1">
+              <svg width="12" height="12" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round">
+                <circle cx="12" cy="12" r="10" />
+                <polyline points="12 6 12 12 16 14" />
+              </svg>
+              {formatDate(lastUpdate)}
+            </span>
+          )}
+        </div>
+      </div>
+
+      {/* Reply count badge */}
+      <div className="mt-1 shrink-0">
+        <span className="inline-flex min-w-[2rem] items-center justify-center rounded-full bg-white/[0.06] px-2.5 py-1 text-xs font-medium text-white/60">
+          {posts}
+        </span>
+      </div>
+    </a>
+  )
+}
+
+function slugify(text) {
+  return (text ?? '')
+    .toLowerCase()
+    .replace(/[^a-z0-9]+/g, '-')
+    .replace(/(^-|-$)/g, '')
+    .slice(0, 80)
+}
+
+function stripHtml(html) {
+  if (typeof document !== 'undefined') {
+    const div = document.createElement('div')
+    div.innerHTML = html
+    return div.textContent || div.innerText || ''
+  }
+  return html.replace(/<[^>]*>/g, '')
+}
+
+function formatDate(dateStr) {
+  try {
+    const d = new Date(dateStr)
+    return d.toLocaleDateString('en-GB', { day: '2-digit', month: '2-digit', year: 'numeric' })
+      + ' ' + d.toLocaleTimeString('en-GB', { hour: '2-digit', minute: '2-digit' })
+  } catch {
+    return '-'
+  }
+}