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/Feed/PostActions.jsx

@@ -0,0 +1,139 @@
+import React, { useState } from 'react'
+import axios from 'axios'
+
+/**
+ * PostActions: Like toggle, Comment toggle, Share menu, Report
+ */
+export default function PostActions({
+  post,
+  isLoggedIn,
+  onCommentToggle,
+  onReactionChange,
+}) {
+  const [liked,     setLiked]     = useState(post.viewer_liked ?? false)
+  const [likeCount, setLikeCount] = useState(post.reactions_count ?? 0)
+  const [busy,      setBusy]      = useState(false)
+  const [menuOpen,  setMenuOpen]  = useState(false)
+  const [shareMsg,  setShareMsg]  = useState(null)
+
+  const handleLike = async () => {
+    if (!isLoggedIn) {
+      window.location.href = '/login'
+      return
+    }
+    if (busy) return
+    setBusy(true)
+    try {
+      if (liked) {
+        await axios.delete(`/api/posts/${post.id}/reactions/like`)
+        setLiked(false)
+        setLikeCount((c) => Math.max(0, c - 1))
+        onReactionChange?.({ liked: false, count: Math.max(0, likeCount - 1) })
+      } else {
+        await axios.post(`/api/posts/${post.id}/reactions`, { reaction: 'like' })
+        setLiked(true)
+        setLikeCount((c) => c + 1)
+        onReactionChange?.({ liked: true, count: likeCount + 1 })
+      }
+    } catch {
+      // ignore
+    } finally {
+      setBusy(false)
+    }
+  }
+
+  const handleCopyLink = () => {
+    const url = `${window.location.origin}/@${post.author.username}?tab=posts&post=${post.id}`
+    navigator.clipboard?.writeText(url)
+    setShareMsg('Link copied!')
+    setTimeout(() => setShareMsg(null), 2000)
+    setMenuOpen(false)
+  }
+
+  const handleReport = async () => {
+    setMenuOpen(false)
+    const reason = window.prompt('Why are you reporting this post? (required)')
+    if (!reason?.trim()) return
+    try {
+      await axios.post(`/api/posts/${post.id}/report`, { reason: reason.trim() })
+      alert('Report submitted. Thank you!')
+    } catch (err) {
+      if (err.response?.data?.message) {
+        alert(err.response.data.message)
+      }
+    }
+  }
+
+  return (
+    <div className="flex items-center gap-1 text-slate-400 relative">
+      {/* Like */}
+      <button
+        onClick={handleLike}
+        disabled={busy}
+        className={`flex items-center gap-1.5 px-3 py-1.5 rounded-lg text-sm transition-colors ${
+          liked
+            ? 'text-sky-400 bg-sky-500/10 hover:bg-sky-500/20'
+            : 'hover:bg-white/5 hover:text-slate-200'
+        }`}
+        title={liked ? 'Unlike' : 'Like'}
+        aria-label={liked ? 'Unlike this post' : 'Like this post'}
+      >
+        <i className={`fa-${liked ? 'solid' : 'regular'} fa-heart fa-fw text-xs`} />
+        <span className="tabular-nums">{likeCount > 0 && likeCount}</span>
+      </button>
+
+      {/* Comment toggle */}
+      <button
+        onClick={onCommentToggle}
+        className="flex items-center gap-1.5 px-3 py-1.5 rounded-lg text-sm hover:bg-white/5 hover:text-slate-200 transition-colors"
+        title="Comment"
+        aria-label="Show comments"
+      >
+        <i className="fa-regular fa-comment fa-fw text-xs" />
+        <span className="tabular-nums">{post.comments_count > 0 && post.comments_count}</span>
+      </button>
+
+      {/* Share / More menu */}
+      <div className="relative ml-auto">
+        <button
+          onClick={() => setMenuOpen((v) => !v)}
+          className="flex items-center gap-1 px-3 py-1.5 rounded-lg text-sm hover:bg-white/5 hover:text-slate-200 transition-colors"
+          aria-label="More options"
+        >
+          <i className="fa-solid fa-ellipsis-h fa-fw text-xs" />
+        </button>
+
+        {menuOpen && (
+          <div
+            className="absolute right-0 bottom-full mb-1 w-44 rounded-xl border border-white/10 bg-[#10192e] shadow-2xl z-50 overflow-hidden"
+            onBlur={() => setMenuOpen(false)}
+          >
+            <button
+              onClick={handleCopyLink}
+              className="w-full text-left px-4 py-2.5 text-sm text-slate-300 hover:bg-white/5 flex items-center gap-2"
+            >
+              <i className="fa-solid fa-link fa-fw opacity-60" />
+              Copy link
+            </button>
+            {isLoggedIn && (
+              <button
+                onClick={handleReport}
+                className="w-full text-left px-4 py-2.5 text-sm text-rose-400 hover:bg-white/5 flex items-center gap-2"
+              >
+                <i className="fa-solid fa-flag fa-fw opacity-60" />
+                Report post
+              </button>
+            )}
+          </div>
+        )}
+      </div>
+
+      {/* Share feedback toast */}
+      {shareMsg && (
+        <span className="absolute -top-8 right-0 text-xs bg-slate-800 text-white px-2 py-1 rounded shadow">
+          {shareMsg}
+        </span>
+      )}
+    </div>
+  )
+}