feat: initial release of relaticle/comments

Filament comments package with:
- Polymorphic commenting on any Eloquent model
- Threaded replies with configurable depth
- @mentions with autocomplete and user search
- Emoji reactions with toggle and who-reacted tooltips
- File attachments via Livewire uploads
- Reply and mention notifications via Filament notification system
- Thread subscriptions for notification control
- Real-time broadcasting (opt-in Echo) with polling fallback
- Dark mode support
- CommentsAction, CommentsTableAction, CommentsEntry for Filament integration
- 204 tests, 421 assertions

tests/Feature/SubscriptionToggleTest.php

@@ -0,0 +1,83 @@
+<?php
+
+use Livewire\Livewire;
+use Relaticle\Comments\CommentSubscription;
+use Relaticle\Comments\Livewire\Comments;
+use Relaticle\Comments\Tests\Models\Post;
+use Relaticle\Comments\Tests\Models\User;
+
+it('subscribes user when toggling from unsubscribed state', function () {
+    $user = User::factory()->create();
+    $post = Post::factory()->create();
+
+    $this->actingAs($user);
+
+    expect(CommentSubscription::isSubscribed($post, $user))->toBeFalse();
+
+    Livewire::test(Comments::class, ['model' => $post])
+        ->call('toggleSubscription');
+
+    expect(CommentSubscription::isSubscribed($post, $user))->toBeTrue();
+});
+
+it('unsubscribes user when toggling from subscribed state', function () {
+    $user = User::factory()->create();
+    $post = Post::factory()->create();
+
+    CommentSubscription::subscribe($post, $user);
+
+    $this->actingAs($user);
+
+    expect(CommentSubscription::isSubscribed($post, $user))->toBeTrue();
+
+    Livewire::test(Comments::class, ['model' => $post])
+        ->call('toggleSubscription');
+
+    expect(CommentSubscription::isSubscribed($post, $user))->toBeFalse();
+});
+
+it('returns true for isSubscribed computed when user is subscribed', function () {
+    $user = User::factory()->create();
+    $post = Post::factory()->create();
+
+    CommentSubscription::subscribe($post, $user);
+
+    $this->actingAs($user);
+
+    $component = Livewire::test(Comments::class, ['model' => $post]);
+
+    expect($component->instance()->isSubscribed())->toBeTrue();
+});
+
+it('returns false for isSubscribed computed when user is not subscribed', function () {
+    $user = User::factory()->create();
+    $post = Post::factory()->create();
+
+    $this->actingAs($user);
+
+    $component = Livewire::test(Comments::class, ['model' => $post]);
+
+    expect($component->instance()->isSubscribed())->toBeFalse();
+});
+
+it('renders Subscribed text for subscribed user', function () {
+    $user = User::factory()->create();
+    $post = Post::factory()->create();
+
+    CommentSubscription::subscribe($post, $user);
+
+    $this->actingAs($user);
+
+    Livewire::test(Comments::class, ['model' => $post])
+        ->assertSee('Subscribed');
+});
+
+it('renders Subscribe text for unsubscribed user', function () {
+    $user = User::factory()->create();
+    $post = Post::factory()->create();
+
+    $this->actingAs($user);
+
+    Livewire::test(Comments::class, ['model' => $post])
+        ->assertSee('Subscribe');
+});