Add friend library comparison and game comments features

- CompareController: side-by-side library diff with stats (common games, rating diff)
- GameCommentController + GameCommentPolicy: threaded comments with replies, auth-gated
- GameComment model with top-level scope and self-referential replies relation
- Migration: game_comments table with parent_id for threading
- games/show: Discussion section with Alpine.js (post, reply, delete)
- compare/show: tabbed view (in common, they have, you have) with game cards
- users/show: "Compare Libraries" button visible to other authenticated users

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

app/Http/Controllers/CompareController.php

@@ -0,0 +1,62 @@
+<?php
+
+namespace App\Http\Controllers;
+
+use App\Models\User;
+
+class CompareController extends Controller
+{
+    public function show(User $user)
+    {
+        if (auth()->id() === $user->id) {
+            return redirect()->route('users.show', $user->username);
+        }
+
+        $myGames    = auth()->user()->library()->with('game')->get()->keyBy('game_id');
+        $theirGames = $user->library()->with('game')->get()->keyBy('game_id');
+
+        $myIds    = $myGames->keys()->values();
+        $theirIds = $theirGames->keys()->values();
+
+        $bothIds          = $myIds->intersect($theirIds)->values();
+        $theyHaveNotYouIds = $theirIds->diff($myIds)->values();
+        $youHaveNotThemIds = $myIds->diff($theirIds)->values();
+
+        $both = $bothIds->map(fn($id) => [
+            'game'       => $myGames[$id]->game,
+            'myEntry'    => $myGames[$id],
+            'theirEntry' => $theirGames[$id],
+        ])->filter(fn($item) => $item['game'] !== null)->values();
+
+        $theyHaveNotYou = $theyHaveNotYouIds
+            ->map(fn($id) => $theirGames[$id])
+            ->filter(fn($ug) => $ug->game !== null)
+            ->values();
+
+        $youHaveNotThem = $youHaveNotThemIds
+            ->map(fn($id) => $myGames[$id])
+            ->filter(fn($ug) => $ug->game !== null)
+            ->values();
+
+        // Average rating diff on games both rated
+        $diffSum   = 0;
+        $diffCount = 0;
+        foreach ($bothIds as $id) {
+            $myRating    = $myGames[$id]->rating;
+            $theirRating = $theirGames[$id]->rating;
+            if ($myRating !== null && $theirRating !== null) {
+                $diffSum += abs($myRating - $theirRating);
+                $diffCount++;
+            }
+        }
+
+        $stats = [
+            'both_count'     => $bothIds->count(),
+            'they_not_you'   => $theyHaveNotYouIds->count(),
+            'you_not_them'   => $youHaveNotThemIds->count(),
+            'avg_rating_diff' => $diffCount > 0 ? round($diffSum / $diffCount, 1) : null,
+        ];
+
+        return view('compare.show', compact('user', 'both', 'theyHaveNotYou', 'youHaveNotThem', 'stats'));
+    }
+}

app/Http/Controllers/GameCommentController.php

@@ -0,0 +1,49 @@
+<?php
+
+namespace App\Http\Controllers;
+
+use App\Models\Game;
+use App\Models\GameComment;
+use Illuminate\Http\JsonResponse;
+use Illuminate\Http\Request;
+
+class GameCommentController extends Controller
+{
+    public function store(Request $request, Game $game): JsonResponse
+    {
+        $data = $request->validate([
+            'body'      => 'required|string|max:1000',
+            'parent_id' => 'nullable|integer|exists:game_comments,id',
+        ]);
+
+        if (isset($data['parent_id'])) {
+            $parent = GameComment::findOrFail($data['parent_id']);
+            abort_if($parent->game_id !== $game->id, 422, 'Parent comment does not belong to this game.');
+        }
+
+        $comment = $game->comments()->create([
+            'user_id'   => auth()->id(),
+            'body'      => $data['body'],
+            'parent_id' => $data['parent_id'] ?? null,
+        ]);
+
+        $comment->load('user');
+
+        return response()->json([
+            'id'           => $comment->id,
+            'body'         => $comment->body,
+            'user'         => ['name' => $comment->user->name, 'username' => $comment->user->username],
+            'user_id'      => $comment->user_id,
+            'created_at'   => $comment->created_at->diffForHumans(),
+            'replies_count' => 0,
+        ], 201);
+    }
+
+    public function destroy(GameComment $comment): JsonResponse
+    {
+        $this->authorize('delete', $comment);
+        $comment->delete();
+
+        return response()->json(['deleted' => true]);
+    }
+}

app/Http/Controllers/GameController.php

@@ -3,6 +3,7 @@
 namespace App\Http\Controllers;
 
 use App\Models\Game;
+use App\Models\GameComment;
 use App\Models\Genre;
 use App\Models\Platform;
 use Illuminate\Http\Request;
@@ -54,7 +55,13 @@ class GameController extends Controller
             $userLists  = auth()->user()->lists()->get(['id', 'title']);
         }
 
-        $response = view('games.show', compact('game', 'userGame', 'userReview', 'userLists'));
+        $comments = $game->comments()->whereNull('parent_id')
+            ->with(['user', 'replies.user'])
+            ->latest()
+            ->limit(20)
+            ->get();
+
+        $response = view('games.show', compact('game', 'userGame', 'userReview', 'userLists', 'comments'));
         return auth()->check()
             ? $response
             : response($response)->header('Cache-Control', 'public, max-age=300');

app/Models/Game.php

@@ -62,6 +62,11 @@ class Game extends Model
         return $this->hasMany(Review::class)->latest();
     }
 
+    public function comments(): HasMany
+    {
+        return $this->hasMany(GameComment::class);
+    }
+
     public function toSearchableArray(): array
     {
         return [

app/Models/GameComment.php

@@ -0,0 +1,19 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Builder;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+use Illuminate\Database\Eloquent\Relations\HasMany;
+
+class GameComment extends Model
+{
+    protected $fillable = ['user_id', 'game_id', 'parent_id', 'body'];
+
+    public function user(): BelongsTo { return $this->belongsTo(User::class); }
+    public function game(): BelongsTo { return $this->belongsTo(Game::class); }
+    public function replies(): HasMany { return $this->hasMany(GameComment::class, 'parent_id')->with('user')->latest(); }
+
+    public function scopeTopLevel(Builder $query): Builder { return $query->whereNull('parent_id'); }
+}

app/Policies/GameCommentPolicy.php

@@ -0,0 +1,14 @@
+<?php
+
+namespace App\Policies;
+
+use App\Models\GameComment;
+use App\Models\User;
+
+class GameCommentPolicy
+{
+    public function delete(User $user, GameComment $comment): bool
+    {
+        return $user->id === $comment->user_id;
+    }
+}

app/Providers/AppServiceProvider.php

@@ -25,5 +25,6 @@ class AppServiceProvider extends ServiceProvider
         Gate::policy(UserGame::class, UserGamePolicy::class);
         Gate::policy(\App\Models\Review::class, \App\Policies\ReviewPolicy::class);
         Gate::policy(\App\Models\UserList::class, \App\Policies\ListPolicy::class);
+        Gate::policy(\App\Models\GameComment::class, \App\Policies\GameCommentPolicy::class);
     }
 }

database/migrations/2026_05_30_000001_create_game_comments_table.php

@@ -0,0 +1,25 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    public function up(): void
+    {
+        Schema::create('game_comments', function (Blueprint $table) {
+            $table->id();
+            $table->foreignId('user_id')->constrained()->cascadeOnDelete();
+            $table->foreignId('game_id')->constrained()->cascadeOnDelete();
+            $table->foreignId('parent_id')->nullable()->constrained('game_comments')->cascadeOnDelete();
+            $table->text('body');
+            $table->timestamps();
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::dropIfExists('game_comments');
+    }
+};

resources/views/compare/show.blade.php

@@ -0,0 +1,206 @@
+@extends('layouts.app')
+
+@section('title', 'Your Library vs ' . ($user->username ?? $user->name) . ' — GameLog')
+
+@section('content')
+<div class="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8 py-10"
+     x-data="{ tab: 'both' }">
+
+    {{-- Header --}}
+    <div class="mb-8">
+        <a href="{{ route('users.show', $user->username) }}"
+           class="text-sm text-slate-500 hover:text-slate-300 transition-colors mb-2 inline-block">
+            ← {{ $user->username ?? $user->name }}'s profile
+        </a>
+        <h1 class="text-2xl font-bold text-white">
+            Your Library vs <span class="text-purple-400">{{ $user->username ?? $user->name }}</span>'s Library
+        </h1>
+    </div>
+
+    {{-- Stats Row --}}
+    <div class="grid grid-cols-2 sm:grid-cols-4 gap-4 mb-8">
+        <div class="bg-[#16161d] border border-white/10 rounded-xl p-4 text-center">
+            <div class="text-2xl font-bold text-white">{{ $stats['both_count'] }}</div>
+            <div class="text-xs text-slate-500 mt-1 uppercase tracking-wide">In Common</div>
+        </div>
+        <div class="bg-[#16161d] border border-white/10 rounded-xl p-4 text-center">
+            <div class="text-2xl font-bold text-white">{{ $stats['they_not_you'] }}</div>
+            <div class="text-xs text-slate-500 mt-1 uppercase tracking-wide">They Have, You Don't</div>
+        </div>
+        <div class="bg-[#16161d] border border-white/10 rounded-xl p-4 text-center">
+            <div class="text-2xl font-bold text-white">{{ $stats['you_not_them'] }}</div>
+            <div class="text-xs text-slate-500 mt-1 uppercase tracking-wide">You Have, They Don't</div>
+        </div>
+        <div class="bg-[#16161d] border border-white/10 rounded-xl p-4 text-center">
+            @if($stats['avg_rating_diff'] !== null)
+                <div class="text-2xl font-bold text-white">{{ $stats['avg_rating_diff'] }}</div>
+                <div class="text-xs text-slate-500 mt-1 uppercase tracking-wide">Avg Rating Diff</div>
+            @else
+                <div class="text-2xl font-bold text-slate-600">—</div>
+                <div class="text-xs text-slate-500 mt-1 uppercase tracking-wide">Avg Rating Diff</div>
+            @endif
+        </div>
+    </div>
+
+    {{-- Tabs --}}
+    <div class="flex gap-1 mb-6 bg-[#16161d] border border-white/10 rounded-xl p-1 w-fit">
+        <button @click="tab = 'both'"
+                :class="tab === 'both' ? 'bg-purple-600 text-white' : 'text-slate-400 hover:text-white'"
+                class="px-4 py-2 text-sm font-medium rounded-lg transition-colors">
+            In Common ({{ $stats['both_count'] }})
+        </button>
+        <button @click="tab = 'they'"
+                :class="tab === 'they' ? 'bg-purple-600 text-white' : 'text-slate-400 hover:text-white'"
+                class="px-4 py-2 text-sm font-medium rounded-lg transition-colors">
+            They Played, You Haven't ({{ $stats['they_not_you'] }})
+        </button>
+        <button @click="tab = 'you'"
+                :class="tab === 'you' ? 'bg-purple-600 text-white' : 'text-slate-400 hover:text-white'"
+                class="px-4 py-2 text-sm font-medium rounded-lg transition-colors">
+            You Played, They Haven't ({{ $stats['you_not_them'] }})
+        </button>
+    </div>
+
+    {{-- Tab: In Common --}}
+    <div x-show="tab === 'both'" x-transition>
+        @if($both->isEmpty())
+            <div class="text-center py-16 text-slate-500">No games in common yet.</div>
+        @else
+            <div class="grid grid-cols-2 sm:grid-cols-3 md:grid-cols-4 lg:grid-cols-5 gap-4">
+                @foreach($both as $item)
+                    @php $game = $item['game']; @endphp
+                    <div class="bg-[#16161d] border border-white/5 rounded-xl overflow-hidden hover:border-white/20 transition-colors">
+                        <a href="{{ route('games.show', $game) }}">
+                            @if($game->cover_url)
+                                <img src="{{ $game->cover_url }}" alt="{{ $game->title }}" class="w-full aspect-[3/4] object-cover">
+                            @else
+                                <div class="w-full aspect-[3/4] bg-[#0f0f13] flex items-center justify-center">
+                                    <svg class="w-10 h-10 text-slate-700" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+                                        <path stroke-linecap="round" stroke-linejoin="round" stroke-width="1.5"
+                                              d="M15 5v2m0 4v2m0 4v2M5 5a2 2 0 00-2 2v3a2 2 0 110 4v3a2 2 0 002 2h14a2 2 0 002-2v-3a2 2 0 110-4V7a2 2 0 00-2-2H5z"/>
+                                    </svg>
+                                </div>
+                            @endif
+                        </a>
+                        <div class="p-3">
+                            <a href="{{ route('games.show', $game) }}"
+                               class="text-sm font-medium text-slate-200 hover:text-white line-clamp-2 block mb-2 transition-colors">
+                                {{ $game->title }}
+                            </a>
+                            <div class="flex items-center justify-between text-xs text-slate-500">
+                                <div class="flex items-center gap-1">
+                                    <span class="text-slate-600">You</span>
+                                    @if($item['myEntry']->rating)
+                                        <span class="text-yellow-400 font-bold">{{ $item['myEntry']->rating }}</span>
+                                    @else
+                                        <span class="text-slate-600">—</span>
+                                    @endif
+                                </div>
+                                <div class="w-px h-3 bg-white/10"></div>
+                                <div class="flex items-center gap-1">
+                                    <span class="text-slate-600">Them</span>
+                                    @if($item['theirEntry']->rating)
+                                        <span class="text-purple-400 font-bold">{{ $item['theirEntry']->rating }}</span>
+                                    @else
+                                        <span class="text-slate-600">—</span>
+                                    @endif
+                                </div>
+                            </div>
+                        </div>
+                    </div>
+                @endforeach
+            </div>
+        @endif
+    </div>
+
+    {{-- Tab: They Played, You Haven't --}}
+    <div x-show="tab === 'they'" x-transition>
+        @if($theyHaveNotYou->isEmpty())
+            <div class="text-center py-16 text-slate-500">No games here.</div>
+        @else
+            <div class="grid grid-cols-2 sm:grid-cols-3 md:grid-cols-4 lg:grid-cols-5 gap-4">
+                @foreach($theyHaveNotYou as $entry)
+                    <div class="bg-[#16161d] border border-white/5 rounded-xl overflow-hidden hover:border-white/20 transition-colors">
+                        <a href="{{ route('games.show', $entry->game) }}">
+                            @if($entry->game->cover_url)
+                                <img src="{{ $entry->game->cover_url }}" alt="{{ $entry->game->title }}" class="w-full aspect-[3/4] object-cover">
+                            @else
+                                <div class="w-full aspect-[3/4] bg-[#0f0f13] flex items-center justify-center">
+                                    <svg class="w-10 h-10 text-slate-700" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+                                        <path stroke-linecap="round" stroke-linejoin="round" stroke-width="1.5"
+                                              d="M15 5v2m0 4v2m0 4v2M5 5a2 2 0 00-2 2v3a2 2 0 110 4v3a2 2 0 002 2h14a2 2 0 002-2v-3a2 2 0 110-4V7a2 2 0 00-2-2H5z"/>
+                                    </svg>
+                                </div>
+                            @endif
+                        </a>
+                        <div class="p-3">
+                            <a href="{{ route('games.show', $entry->game) }}"
+                               class="text-sm font-medium text-slate-200 hover:text-white line-clamp-2 block mb-2 transition-colors">
+                                {{ $entry->game->title }}
+                            </a>
+                            @if($entry->rating)
+                                <div class="flex items-center gap-1 text-xs text-slate-500 mb-2">
+                                    <svg class="w-3 h-3 text-yellow-400" fill="currentColor" viewBox="0 0 20 20">
+                                        <path d="M9.049 2.927c.3-.921 1.603-.921 1.902 0l1.07 3.292a1 1 0 00.95.69h3.462c.969 0 1.371 1.24.588 1.81l-2.8 2.034a1 1 0 00-.364 1.118l1.07 3.292c.3.921-.755 1.688-1.54 1.118l-2.8-2.034a1 1 0 00-1.175 0l-2.8 2.034c-.784.57-1.838-.197-1.539-1.118l1.07-3.292a1 1 0 00-.364-1.118L2.98 8.72c-.783-.57-.38-1.81.588-1.81h3.461a1 1 0 00.951-.69l1.07-3.292z"/>
+                                    </svg>
+                                    <span class="font-semibold text-white">{{ $entry->rating }}</span><span>/10</span>
+                                </div>
+                            @endif
+                            <form method="POST" action="{{ route('library.store') }}">
+                                @csrf
+                                <input type="hidden" name="game_id" value="{{ $entry->game->id }}">
+                                <input type="hidden" name="status" value="want_to_play">
+                                <button type="submit"
+                                        class="w-full text-xs px-2 py-1.5 bg-purple-600/20 hover:bg-purple-600/40 text-purple-300 hover:text-white border border-purple-600/30 rounded-lg transition-colors">
+                                    + Add to Library
+                                </button>
+                            </form>
+                        </div>
+                    </div>
+                @endforeach
+            </div>
+        @endif
+    </div>
+
+    {{-- Tab: You Played, They Haven't --}}
+    <div x-show="tab === 'you'" x-transition>
+        @if($youHaveNotThem->isEmpty())
+            <div class="text-center py-16 text-slate-500">No games here.</div>
+        @else
+            <div class="grid grid-cols-2 sm:grid-cols-3 md:grid-cols-4 lg:grid-cols-5 gap-4">
+                @foreach($youHaveNotThem as $entry)
+                    <div class="bg-[#16161d] border border-white/5 rounded-xl overflow-hidden hover:border-white/20 transition-colors">
+                        <a href="{{ route('games.show', $entry->game) }}">
+                            @if($entry->game->cover_url)
+                                <img src="{{ $entry->game->cover_url }}" alt="{{ $entry->game->title }}" class="w-full aspect-[3/4] object-cover">
+                            @else
+                                <div class="w-full aspect-[3/4] bg-[#0f0f13] flex items-center justify-center">
+                                    <svg class="w-10 h-10 text-slate-700" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+                                        <path stroke-linecap="round" stroke-linejoin="round" stroke-width="1.5"
+                                              d="M15 5v2m0 4v2m0 4v2M5 5a2 2 0 00-2 2v3a2 2 0 110 4v3a2 2 0 002 2h14a2 2 0 002-2v-3a2 2 0 110-4V7a2 2 0 00-2-2H5z"/>
+                                    </svg>
+                                </div>
+                            @endif
+                        </a>
+                        <div class="p-3">
+                            <a href="{{ route('games.show', $entry->game) }}"
+                               class="text-sm font-medium text-slate-200 hover:text-white line-clamp-2 block mb-2 transition-colors">
+                                {{ $entry->game->title }}
+                            </a>
+                            @if($entry->rating)
+                                <div class="flex items-center gap-1 text-xs text-slate-500">
+                                    <svg class="w-3 h-3 text-yellow-400" fill="currentColor" viewBox="0 0 20 20">
+                                        <path d="M9.049 2.927c.3-.921 1.603-.921 1.902 0l1.07 3.292a1 1 0 00.95.69h3.462c.969 0 1.371 1.24.588 1.81l-2.8 2.034a1 1 0 00-.364 1.118l1.07 3.292c.3.921-.755 1.688-1.54 1.118l-2.8-2.034a1 1 0 00-1.175 0l-2.8 2.034c-.784.57-1.838-.197-1.539-1.118l1.07-3.292a1 1 0 00-.364-1.118L2.98 8.72c-.783-.57-.38-1.81.588-1.81h3.461a1 1 0 00.951-.69l1.07-3.292z"/>
+                                    </svg>
+                                    <span class="font-semibold text-white">{{ $entry->rating }}</span><span>/10</span>
+                                </div>
+                            @endif
+                        </div>
+                    </div>
+                @endforeach
+            </div>
+        @endif
+    </div>
+
+</div>
+@endsection

resources/views/games/show.blade.php

@@ -315,6 +315,127 @@
     </div>
     @endif
 
+    {{-- Comments --}}
+    @php
+        $commentsData = $comments->map(fn($c) => [
+            'id'         => $c->id,
+            'body'       => $c->body,
+            'user'       => ['name' => $c->user->name, 'username' => $c->user->username],
+            'user_id'    => $c->user_id,
+            'created_at' => $c->created_at->diffForHumans(),
+            'replies'    => $c->replies->map(fn($r) => [
+                'id'         => $r->id,
+                'body'       => $r->body,
+                'user'       => ['name' => $r->user->name, 'username' => $r->user->username],
+                'user_id'    => $r->user_id,
+                'created_at' => $r->created_at->diffForHumans(),
+            ])->values()->all(),
+        ])->values()->all();
+    @endphp
+    <div class="mt-10 pt-8 border-t border-white/5" id="comments"
+         x-data="commentsWidget({{ Js::from($commentsData) }}, '{{ route('games.comments.store', $game) }}', {{ auth()->id() ?? 'null' }})">
+
+        <h2 class="text-lg font-semibold text-white mb-4">Discussion</h2>
+        <div class="max-w-3xl">
+
+            {{-- New comment form (auth only) --}}
+            @auth
+            <div class="mb-6 bg-[#16161d] border border-white/10 rounded-lg p-4">
+                <textarea x-model="body" rows="3"
+                          placeholder="Share your thoughts…"
+                          class="w-full bg-[#0f0f13] border border-white/10 rounded-lg px-4 py-3 text-sm text-slate-200 placeholder-slate-500 focus:outline-none focus:border-purple-500 focus:ring-1 focus:ring-purple-500 resize-none transition mb-3"></textarea>
+                <div class="flex items-center justify-between">
+                    <span class="text-xs text-slate-600" x-text="body.length + ' / 1000'"></span>
+                    <button @click="submitComment()"
+                            :disabled="!body.trim() || submitting"
+                            class="px-4 py-2 bg-purple-600 hover:bg-purple-700 disabled:opacity-40 disabled:cursor-not-allowed text-white text-sm font-semibold rounded-lg transition-colors">
+                        Post Comment
+                    </button>
+                </div>
+            </div>
+            @else
+            <div class="mb-6 bg-[#16161d] border border-white/10 rounded-lg p-4 text-center">
+                <p class="text-slate-400 text-sm">
+                    <a href="{{ route('login') }}" class="text-purple-400 hover:text-purple-300 transition-colors">Log in</a>
+                    to join the discussion.
+                </p>
+            </div>
+            @endauth
+
+            {{-- Comment list --}}
+            <div class="space-y-4">
+                <template x-if="comments.length === 0">
+                    <p class="text-slate-500 text-sm">No comments yet. Be the first!</p>
+                </template>
+                <template x-for="comment in comments" :key="comment.id">
+                    <div class="bg-[#16161d] rounded-lg p-4 border border-white/5">
+                        {{-- Comment header --}}
+                        <div class="flex items-start justify-between gap-2 mb-2">
+                            <div class="flex items-center gap-2">
+                                <div class="w-7 h-7 rounded-full bg-purple-700 flex items-center justify-center text-xs font-bold text-white flex-shrink-0"
+                                     x-text="comment.user.name.charAt(0).toUpperCase()"></div>
+                                <span class="text-sm font-medium text-slate-300" x-text="comment.user.username || comment.user.name"></span>
+                                <span class="text-xs text-slate-600" x-text="comment.created_at"></span>
+                            </div>
+                            <div class="flex items-center gap-2">
+                                @auth
+                                <button x-show="comment.user_id === authUserId"
+                                        @click="deleteComment(comment)"
+                                        class="text-xs text-red-500 hover:text-red-400 transition-colors">Delete</button>
+                                @endauth
+                            </div>
+                        </div>
+                        {{-- Body --}}
+                        <p class="text-slate-400 text-sm leading-relaxed mb-3" x-text="comment.body"></p>
+
+                        {{-- Replies --}}
+                        <div class="ml-6 space-y-3 mb-3">
+                            <template x-for="reply in comment.replies" :key="reply.id">
+                                <div class="bg-[#0f0f13] rounded-lg p-3 border border-white/5">
+                                    <div class="flex items-start justify-between gap-2 mb-1">
+                                        <div class="flex items-center gap-2">
+                                            <div class="w-5 h-5 rounded-full bg-purple-800 flex items-center justify-center text-xs font-bold text-white flex-shrink-0"
+                                                 x-text="reply.user.name.charAt(0).toUpperCase()"></div>
+                                            <span class="text-xs font-medium text-slate-300" x-text="reply.user.username || reply.user.name"></span>
+                                            <span class="text-xs text-slate-600" x-text="reply.created_at"></span>
+                                        </div>
+                                        @auth
+                                        <button x-show="reply.user_id === authUserId"
+                                                @click="deleteReply(reply, comment)"
+                                                class="text-xs text-red-500 hover:text-red-400 transition-colors">Delete</button>
+                                        @endauth
+                                    </div>
+                                    <p class="text-slate-400 text-xs leading-relaxed" x-text="reply.body"></p>
+                                </div>
+                            </template>
+                        </div>
+
+                        {{-- Reply toggle --}}
+                        @auth
+                        <div>
+                            <button @click="comment.showReply = !comment.showReply"
+                                    class="text-xs text-slate-500 hover:text-purple-400 transition-colors">
+                                <span x-text="comment.showReply ? 'Cancel' : 'Reply'"></span>
+                            </button>
+                            <div x-show="comment.showReply" x-transition class="mt-2">
+                                <textarea x-model="comment.replyBody" rows="2"
+                                          placeholder="Write a reply…"
+                                          class="w-full bg-[#0f0f13] border border-white/10 rounded-lg px-3 py-2 text-sm text-slate-200 placeholder-slate-500 focus:outline-none focus:border-purple-500 focus:ring-1 focus:ring-purple-500 resize-none transition mb-2"></textarea>
+                                <button @click="submitReply(comment)"
+                                        :disabled="!comment.replyBody?.trim()"
+                                        class="px-3 py-1.5 bg-purple-600 hover:bg-purple-700 disabled:opacity-40 disabled:cursor-not-allowed text-white text-xs font-semibold rounded-lg transition-colors">
+                                    Post Reply
+                                </button>
+                            </div>
+                        </div>
+                        @endauth
+                    </div>
+                </template>
+            </div>
+
+        </div>
+    </div>
+
     {{-- Reviews --}}
     <div class="mt-10 pt-8 border-t border-white/5" id="reviews">
         <h2 class="text-lg font-semibold text-white mb-4">Reviews</h2>
@@ -595,6 +716,82 @@ function deleteReview(id) {
     }).then(r => { if (r.ok) window.location.reload(); });
 }
 
+function commentsWidget(initialComments, storeUrl, authUserId) {
+    return {
+        comments: initialComments.map(c => ({ ...c, showReply: false, replyBody: '' })),
+        body: '',
+        submitting: false,
+        authUserId,
+
+        async submitComment() {
+            if (!this.body.trim() || this.submitting) return;
+            this.submitting = true;
+            const res = await fetch(storeUrl, {
+                method: 'POST',
+                headers: {
+                    'Content-Type': 'application/json',
+                    'X-CSRF-TOKEN': document.querySelector('meta[name="csrf-token"]').content,
+                    'Accept': 'application/json',
+                },
+                body: JSON.stringify({ body: this.body }),
+            });
+            if (res.ok) {
+                const comment = await res.json();
+                this.comments.unshift({ ...comment, replies: [], showReply: false, replyBody: '' });
+                this.body = '';
+            }
+            this.submitting = false;
+        },
+
+        async submitReply(parentComment) {
+            if (!parentComment.replyBody?.trim()) return;
+            const res = await fetch(storeUrl, {
+                method: 'POST',
+                headers: {
+                    'Content-Type': 'application/json',
+                    'X-CSRF-TOKEN': document.querySelector('meta[name="csrf-token"]').content,
+                    'Accept': 'application/json',
+                },
+                body: JSON.stringify({ body: parentComment.replyBody, parent_id: parentComment.id }),
+            });
+            if (res.ok) {
+                const reply = await res.json();
+                parentComment.replies.push(reply);
+                parentComment.showReply = false;
+                parentComment.replyBody = '';
+            }
+        },
+
+        async deleteComment(comment) {
+            if (!confirm('Delete this comment?')) return;
+            const res = await fetch(`/comments/${comment.id}`, {
+                method: 'DELETE',
+                headers: {
+                    'X-CSRF-TOKEN': document.querySelector('meta[name="csrf-token"]').content,
+                    'Accept': 'application/json',
+                },
+            });
+            if (res.ok) {
+                this.comments = this.comments.filter(c => c.id !== comment.id);
+            }
+        },
+
+        async deleteReply(reply, parentComment) {
+            if (!confirm('Delete this reply?')) return;
+            const res = await fetch(`/comments/${reply.id}`, {
+                method: 'DELETE',
+                headers: {
+                    'X-CSRF-TOKEN': document.querySelector('meta[name="csrf-token"]').content,
+                    'Accept': 'application/json',
+                },
+            });
+            if (res.ok) {
+                parentComment.replies = parentComment.replies.filter(r => r.id !== reply.id);
+            }
+        },
+    };
+}
+
 function addToListWidget(gameId, lists) {
     return {
         gameId,

resources/views/users/show.blade.php

@@ -58,7 +58,7 @@
                 </div>
             </div>
 
-            <div class="flex gap-2">
+            <div class="flex gap-2 flex-wrap">
                 @auth
                 @if(auth()->id() !== $user->id)
                 <div x-data="{
@@ -92,6 +92,14 @@
                    class="px-4 py-2 border border-white/10 hover:border-white/20 text-slate-300 hover:text-white text-sm font-medium rounded-lg transition-colors">
                     View Library
                 </a>
+                @auth
+                @if(auth()->id() !== $user->id)
+                <a href="{{ route('users.compare', $user->username) }}"
+                   class="px-4 py-2 border border-purple-500/40 hover:border-purple-500 text-purple-300 hover:text-white text-sm font-medium rounded-lg transition-colors">
+                    Compare Libraries
+                </a>
+                @endif
+                @endauth
             </div>
         </div>
     </div>

routes/web.php

@@ -1,5 +1,7 @@
 <?php
 
+use App\Http\Controllers\CompareController;
+use App\Http\Controllers\GameCommentController;
 use App\Http\Controllers\GameController;
 use App\Http\Controllers\HomeController;
 use App\Http\Controllers\LibraryController;
@@ -21,6 +23,11 @@ Route::get('/games/{game:slug}', [GameController::class, 'show'])->name('games.s
 Route::get('/users/{user:username}', [UserController::class, 'show'])->name('users.show');
 Route::get('/users/{user:username}/library', [UserController::class, 'library'])->name('users.library');
 
+// Compare (auth required)
+Route::middleware('auth')->group(function () {
+    Route::get('/users/{user:username}/compare', [CompareController::class, 'show'])->name('users.compare');
+});
+
 // Library (auth required)
 Route::middleware('auth')->group(function () {
     Route::post('/library', [LibraryController::class, 'store'])->name('library.store');
@@ -35,6 +42,12 @@ Route::middleware('auth')->group(function () {
     Route::delete('/reviews/{review}', [\App\Http\Controllers\ReviewController::class, 'destroy'])->name('reviews.destroy');
 });
 
+// Comments (auth required)
+Route::middleware('auth')->group(function () {
+    Route::post('/games/{game:slug}/comments', [GameCommentController::class, 'store'])->name('games.comments.store');
+    Route::delete('/comments/{comment}', [GameCommentController::class, 'destroy'])->name('comments.destroy');
+});
+
 // Lists
 Route::get('/lists', [\App\Http\Controllers\ListController::class, 'index'])->name('lists.index')->middleware('auth');
 Route::post('/lists', [\App\Http\Controllers\ListController::class, 'store'])->name('lists.store')->middleware('auth');