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

routes/web.php

@@ -398,3 +398,27 @@ Route::middleware(['auth', 'ensure.onboarding.complete'])->prefix('messages')->n
 // ── Community Activity Feed ───────────────────────────────────────────────────
 Route::get('/community/activity', [\App\Http\Controllers\Web\CommunityActivityController::class, 'index'])
     ->name('community.activity');
+
+// ── Posts / Following Feed ────────────────────────────────────────────────────
+// /feed/following  – Inertia page for the ranked, diversified following feed
+Route::middleware(['auth', 'ensure.onboarding.complete'])
+    ->get('/feed/following', [\App\Http\Controllers\Web\Posts\FollowingFeedController::class, 'index'])
+    ->name('feed.following');
+
+// ── Feed 2.0: Trending Feed ───────────────────────────────────────────────────
+Route::get('/feed/trending', [\App\Http\Controllers\Web\Posts\TrendingFeedController::class, 'index'])
+    ->name('feed.trending');
+
+// ── Feed 2.0: Hashtag Feed ────────────────────────────────────────────────────
+Route::get('/tags/{tag}', [\App\Http\Controllers\Web\Posts\HashtagFeedController::class, 'index'])
+    ->where('tag', '[A-Za-z][A-Za-z0-9_]{1,63}')
+    ->name('feed.hashtag');
+
+// ── Feed 2.0: Saved Posts ─────────────────────────────────────────────────────
+Route::middleware(['auth'])
+    ->get('/feed/saved', [\App\Http\Controllers\Web\Posts\SavedFeedController::class, 'index'])
+    ->name('feed.saved');
+
+// ── Feed 2.0: Post Search ─────────────────────────────────────────────────────
+Route::get('/feed/search', [\App\Http\Controllers\Web\Posts\SearchFeedController::class, 'index'])
+    ->name('feed.search');