feat: add support for selecting additional SSH keys from Hetzner in server creation form

tests/Unit/DatalistComponentTest.php

@@ -0,0 +1,68 @@
+<?php
+
+use App\View\Components\Forms\Datalist;
+
+it('renders with default properties', function () {
+    $component = new Datalist;
+
+    expect($component->required)->toBeFalse()
+        ->and($component->disabled)->toBeFalse()
+        ->and($component->readonly)->toBeFalse()
+        ->and($component->multiple)->toBeFalse()
+        ->and($component->instantSave)->toBeFalse()
+        ->and($component->defaultClass)->toBe('input');
+});
+
+it('uses provided id', function () {
+    $component = new Datalist(id: 'test-datalist');
+
+    expect($component->id)->toBe('test-datalist');
+});
+
+it('accepts multiple selection mode', function () {
+    $component = new Datalist(multiple: true);
+
+    expect($component->multiple)->toBeTrue();
+});
+
+it('accepts instantSave parameter', function () {
+    $component = new Datalist(instantSave: 'customSave');
+
+    expect($component->instantSave)->toBe('customSave');
+});
+
+it('accepts placeholder', function () {
+    $component = new Datalist(placeholder: 'Select an option...');
+
+    expect($component->placeholder)->toBe('Select an option...');
+});
+
+it('accepts autofocus', function () {
+    $component = new Datalist(autofocus: true);
+
+    expect($component->autofocus)->toBeTrue();
+});
+
+it('accepts disabled state', function () {
+    $component = new Datalist(disabled: true);
+
+    expect($component->disabled)->toBeTrue();
+});
+
+it('accepts readonly state', function () {
+    $component = new Datalist(readonly: true);
+
+    expect($component->readonly)->toBeTrue();
+});
+
+it('accepts authorization properties', function () {
+    $component = new Datalist(
+        canGate: 'update',
+        canResource: 'resource',
+        autoDisable: false
+    );
+
+    expect($component->canGate)->toBe('update')
+        ->and($component->canResource)->toBe('resource')
+        ->and($component->autoDisable)->toBeFalse();
+});

tests/Unit/HetznerSshKeysTest.php

@@ -0,0 +1,53 @@
+<?php
+
+it('merges Coolify key with selected Hetzner keys', function () {
+    $coolifyKeyId = 123;
+    $selectedHetznerKeys = [456, 789];
+
+    // Simulate the merge logic from createHetznerServer
+    $sshKeys = array_merge(
+        [$coolifyKeyId],
+        $selectedHetznerKeys
+    );
+
+    expect($sshKeys)->toBe([123, 456, 789])
+        ->and(count($sshKeys))->toBe(3);
+});
+
+it('removes duplicate SSH key IDs', function () {
+    $coolifyKeyId = 123;
+    $selectedHetznerKeys = [123, 456, 789]; // User also selected Coolify key
+
+    // Simulate the merge and deduplication logic
+    $sshKeys = array_merge(
+        [$coolifyKeyId],
+        $selectedHetznerKeys
+    );
+    $sshKeys = array_unique($sshKeys);
+    $sshKeys = array_values($sshKeys);
+
+    expect($sshKeys)->toBe([123, 456, 789])
+        ->and(count($sshKeys))->toBe(3);
+});
+
+it('works with no selected Hetzner keys', function () {
+    $coolifyKeyId = 123;
+    $selectedHetznerKeys = [];
+
+    // Simulate the merge logic
+    $sshKeys = array_merge(
+        [$coolifyKeyId],
+        $selectedHetznerKeys
+    );
+
+    expect($sshKeys)->toBe([123])
+        ->and(count($sshKeys))->toBe(1);
+});
+
+it('validates SSH key IDs are integers', function () {
+    $selectedHetznerKeys = [456, 789, 1011];
+
+    foreach ($selectedHetznerKeys as $keyId) {
+        expect($keyId)->toBeInt();
+    }
+});