Implemented the authenticated admin contact system.

app/Http/Requests/StoreSupportConversationRequest.php

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+<?php
+
+namespace App\Http\Requests;
+
+use App\Models\SupportConversation;
+use Illuminate\Foundation\Http\FormRequest;
+use Illuminate\Validation\Rule;
+
+class StoreSupportConversationRequest extends FormRequest
+{
+    public function authorize(): bool
+    {
+        return $this->user() !== null;
+    }
+
+    /**
+     * @return array<string, array<int, mixed>>
+     */
+    public function rules(): array
+    {
+        return [
+            'category' => ['required', 'string', Rule::in(SupportConversation::categories())],
+            'subject' => ['required', 'string', 'max:120'],
+            'body' => ['required', 'string', 'max:2000'],
+            'attachments' => ['nullable', 'array', 'max:3'],
+            'attachments.*' => ['file', 'max:10240', 'mimes:jpg,jpeg,png,webp,gif,pdf,txt,log,json,zip'],
+        ];
+    }
+}

app/Http/Requests/StoreSupportMessageRequest.php

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+<?php
+
+namespace App\Http\Requests;
+
+use Illuminate\Foundation\Http\FormRequest;
+
+class StoreSupportMessageRequest extends FormRequest
+{
+    public function authorize(): bool
+    {
+        return $this->user() !== null;
+    }
+
+    /**
+     * @return array<string, array<int, string>>
+     */
+    public function rules(): array
+    {
+        return [
+            'body' => ['required', 'string', 'max:2000'],
+            'attachments' => ['nullable', 'array', 'max:3'],
+            'attachments.*' => ['file', 'max:10240', 'mimes:jpg,jpeg,png,webp,gif,pdf,txt,log,json,zip'],
+        ];
+    }
+}

app/Http/Requests/UpdateSupportConversationStatusRequest.php

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+<?php
+
+namespace App\Http\Requests;
+
+use App\Models\SupportConversation;
+use Illuminate\Foundation\Http\FormRequest;
+use Illuminate\Validation\Rule;
+
+class UpdateSupportConversationStatusRequest extends FormRequest
+{
+    public function authorize(): bool
+    {
+        return (bool) $this->user()?->is_admin;
+    }
+
+    /**
+     * @return array<string, array<int, mixed>>
+     */
+    public function rules(): array
+    {
+        return [
+            'status' => ['required', 'string', Rule::in(SupportConversation::statuses())],
+        ];
+    }
+}