Add comprehensive test coverage and update notes

tests/Feature/PostThankControllerTest.php

@@ -90,3 +90,73 @@ it('lists thanks received for a user', function (): void {
         'thanker_name' => 'ThanksGiver',
     ]);
 });
+
+it('requires auth to thank and unthank posts', function (): void {
+    $thread = makeThanksThread();
+    $post = Post::create([
+        'thread_id' => $thread->id,
+        'user_id' => null,
+        'body' => 'Post',
+    ]);
+
+    $this->app['auth']->forgetGuards();
+    $response = $this->postJson("/api/posts/{$post->id}/thanks");
+    $response->assertStatus(401);
+
+    $this->app['auth']->forgetGuards();
+    $response = $this->deleteJson("/api/posts/{$post->id}/thanks");
+    $response->assertStatus(401);
+});
+
+it('creates and deletes thanks for a post', function (): void {
+    $thread = makeThanksThread();
+    $user = User::factory()->create();
+    $post = Post::create([
+        'thread_id' => $thread->id,
+        'user_id' => $user->id,
+        'body' => 'Post',
+    ]);
+
+    Sanctum::actingAs($user);
+    $response = $this->postJson("/api/posts/{$post->id}/thanks");
+    $response->assertStatus(201);
+
+    $response = $this->deleteJson("/api/posts/{$post->id}/thanks");
+    $response->assertStatus(204);
+});
+
+it('serializes group colors for thanks', function (): void {
+    $thread = makeThanksThread();
+    $authorRole = \App\Models\Role::create(['name' => 'ROLE_AUTHOR', 'color' => '#ff0000']);
+    $thankerRole = \App\Models\Role::create(['name' => 'ROLE_THANKER', 'color' => '#00ff00']);
+
+    $author = User::factory()->create(['name' => 'Author']);
+    $author->roles()->attach($authorRole);
+    $author->load('roles');
+    $thanker = User::factory()->create(['name' => 'ThanksGiver']);
+    $thanker->roles()->attach($thankerRole);
+    $thanker->load('roles');
+
+    $post = Post::create([
+        'thread_id' => $thread->id,
+        'user_id' => $author->id,
+        'body' => 'Helpful post',
+    ]);
+
+    PostThank::create([
+        'post_id' => $post->id,
+        'user_id' => $thanker->id,
+    ]);
+
+    Sanctum::actingAs($thanker);
+    $response = $this->getJson("/api/user/{$thanker->id}/thanks/given");
+    $response->assertOk();
+    $payload = $response->getData(true);
+    expect($payload[0]['post_author_group_color'])->toBe('#ff0000');
+
+    Sanctum::actingAs($author);
+    $response = $this->getJson("/api/user/{$author->id}/thanks/received");
+    $response->assertOk();
+    $payload = $response->getData(true);
+    expect($payload[0]['thanker_group_color'])->toBe('#00ff00');
+});