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/Pages/Feed/SavedFeed.jsx

@@ -0,0 +1,105 @@
+import React, { useState, useEffect, useCallback } from 'react'
+import { usePage } from '@inertiajs/react'
+import axios from 'axios'
+import PostCard        from '../../Components/Feed/PostCard'
+import PostCardSkeleton from '../../Components/Feed/PostCardSkeleton'
+
+export default function SavedFeed() {
+  const { props }  = usePage()
+  const { auth }   = props
+  const authUser   = auth?.user ?? null
+
+  const [posts,   setPosts]   = useState([])
+  const [loading, setLoading] = useState(true)
+  const [page,    setPage]    = useState(1)
+  const [hasMore, setHasMore] = useState(false)
+  const [loaded,  setLoaded]  = useState(false)
+
+  const fetchFeed = useCallback(async (p = 1) => {
+    setLoading(true)
+    try {
+      const { data } = await axios.get('/api/posts/saved', { params: { page: p } })
+      setPosts((prev) => p === 1 ? data.data : [...prev, ...data.data])
+      setHasMore(data.meta.current_page < data.meta.last_page)
+      setPage(p)
+    } catch {
+      //
+    } finally {
+      setLoading(false)
+      setLoaded(true)
+    }
+  }, [])
+
+  useEffect(() => { fetchFeed(1) }, [])
+
+  const handleDeleted = useCallback((id) => setPosts((prev) => prev.filter((p) => p.id !== id)), [])
+
+  // When a post is unsaved, remove it from the list too
+  const handleUnsaved = useCallback((id) => setPosts((prev) => prev.filter((p) => p.id !== id)), [])
+
+  return (
+    <div className="min-h-screen bg-[#080f1e]">
+      <div className="max-w-2xl mx-auto px-4 pt-8 pb-16">
+        {/* Header */}
+        <div className="mb-6">
+          <h1 className="text-xl font-bold text-white">
+            <i className="fa-solid fa-bookmark mr-2 text-amber-400 opacity-80" />
+            Saved Posts
+          </h1>
+          <p className="text-sm text-slate-500 mt-0.5">Posts you've bookmarked</p>
+        </div>
+
+        {/* Feed */}
+        <div className="space-y-4">
+          {!loaded && loading && (
+            <>{Array.from({ length: 3 }).map((_, i) => <PostCardSkeleton key={i} />)}</>
+          )}
+
+          {loaded && !loading && posts.length === 0 && (
+            <div className="flex flex-col items-center justify-center py-24 text-center">
+              <div className="w-16 h-16 rounded-2xl bg-white/5 flex items-center justify-center mb-4 text-slate-600">
+                <i className="fa-solid fa-bookmark text-2xl" />
+              </div>
+              <h2 className="text-lg font-semibold text-white/80 mb-2">Nothing saved yet</h2>
+              <p className="text-slate-500 text-sm max-w-xs leading-relaxed">
+                Bookmark posts to read later. Look for the{' '}
+                <i className="fa-regular fa-bookmark text-amber-400" /> icon on any post.
+              </p>
+              <a
+                href="/feed/trending"
+                className="mt-4 text-sm text-sky-400 hover:text-sky-300 transition-colors"
+              >
+                Browse trending posts →
+              </a>
+            </div>
+          )}
+
+          {posts.map((post) => (
+            <PostCard
+              key={post.id}
+              post={post}
+              isLoggedIn={!!authUser}
+              viewerUsername={authUser?.username ?? null}
+              onDelete={handleDeleted}
+              onUnsaved={handleUnsaved}
+            />
+          ))}
+
+          {loaded && hasMore && (
+            <div className="flex justify-center py-4">
+              <button
+                onClick={() => fetchFeed(page + 1)}
+                disabled={loading}
+                className="px-6 py-2.5 rounded-xl bg-white/5 hover:bg-white/10 text-slate-300 text-sm transition-colors disabled:opacity-50"
+              >
+                {loading
+                  ? <><i className="fa-solid fa-spinner fa-spin mr-2" />Loading…</>
+                  : 'Load more'}
+              </button>
+            </div>
+          )}
+        </div>
+      </div>
+    </div>
+  )
+}