Add unit and feature tests for ticket processing and article management

- Implement Fake repositories and services for testing purposes.
- Create tests for Article API including creation, validation, and listing.
- Develop ProcessTicketJobFlowTest to validate ticket processing logic.
- Add QuickReplyAdminTest for creating and updating quick replies.
- Implement TicketAndArticleModelTest to ensure proper cascading deletes and credential encryption.
- Create TicketIngestionTest for ticket creation and job dispatching.
- Add TicketShowPageTest to verify rendering of quick replies and tool calls.
- Implement unit tests for ClassifierPromptBuilder, EmbeddingService, LlmJsonDecoder, QuickReplyResolver, SupportReplyService, TicketResultPayloadBuilder, TicketToolCallService, and ToolCallRequestValidator.

tests/Unit/QuickReplyResolverTest.php

@@ -0,0 +1,40 @@
+<?php
+
+namespace Tests\Unit;
+
+use App\Models\Article;
+use App\Models\QuickReply;
+use App\Services\QuickReplyResolver;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Tests\TestCase;
+
+class QuickReplyResolverTest extends TestCase
+{
+    use RefreshDatabase;
+
+    public function test_it_returns_null_without_article(): void
+    {
+        $resolver = new QuickReplyResolver;
+        $this->assertNull($resolver->resolveForArticle(null));
+    }
+
+    public function test_it_returns_first_active_quick_reply(): void
+    {
+        $article = Article::query()->create([
+            'title' => 'DNS',
+            'content' => 'content',
+        ]);
+
+        $inactive = QuickReply::query()->create(['title' => 'B Reply', 'content' => 'B', 'is_active' => false]);
+        $activeB = QuickReply::query()->create(['title' => 'Z Reply', 'content' => 'Z', 'is_active' => true]);
+        $activeA = QuickReply::query()->create(['title' => 'A Reply', 'content' => 'A', 'is_active' => true]);
+
+        $article->quickReplies()->sync([$inactive->id, $activeB->id, $activeA->id]);
+
+        $resolver = new QuickReplyResolver;
+        $resolved = $resolver->resolveForArticle($article);
+
+        $this->assertInstanceOf(QuickReply::class, $resolved);
+        $this->assertSame($activeA->id, $resolved->id);
+    }
+}