Fix: Handle null content in PlanResource::formatContent method

- Fix deprecated warning when passing null to str_replace() function\n- Use null coalescing operator to provide empty string as default value\n- Comply with PHP 8.2+ type requirements

app/Http/Controllers/V1/Client/ClientController.php

@@ -27,6 +27,7 @@ class ClientController extends Controller
         'vmess' => '[vmess]',
         'trojan' => '[trojan]',
         'tuic' => '[tuic]',
+        'socks' => '[socks]',
     ];
 
     // 支持hy2 的客户端版本列表

app/Http/Controllers/V1/Server/UniProxyController.php

@@ -147,6 +147,9 @@ class UniProxyController extends Controller
                 'zero_rtt_handshake' => false,
                 'heartbeat' => "3s",
             ],
+            'socks' => [
+                'server_port' => (int) $serverPort,
+            ],
             default => []
         };
 

app/Http/Requests/Admin/ServerSave.php

@@ -52,6 +52,8 @@ class ServerSave extends FormRequest
             'reality_settings.public_key' => 'nullable|string',
             'reality_settings.private_key' => 'nullable|string',
             'reality_settings.short_id' => 'nullable|string',
+        ],
+        'socks' => [
         ]
     ];
 
@@ -81,7 +83,7 @@ class ServerSave extends FormRequest
     {
         $type = $this->input('type');
         $rules = $this->getBaseRules();
-        
+
         foreach (self::PROTOCOL_RULES[$type] ?? [] as $field => $rule) {
             $rules['protocol_settings.' . $field] = $rule;
         }

app/Http/Resources/PlanResource.php

@@ -80,7 +80,7 @@ class PlanResource extends JsonResource
      */
     protected function formatContent(): string
     {
-        $content = $this->resource['content'];
+        $content = $this->resource['content'] ?? '';
         
         $replacements = [
             '{{transfer}}' => $this->resource['transfer_enable'],

app/Models/Server.php

@@ -18,7 +18,7 @@ class Server extends Model
     public const TYPE_VMESS = 'vmess';
     public const TYPE_TUIC = 'tuic';
     public const TYPE_SHADOWSOCKS = 'shadowsocks';
-
+    public const TYPE_SOCKS = 'socks';
     public const STATUS_OFFLINE = 0;
     public const STATUS_ONLINE_NO_PUSH = 1;
     public const STATUS_ONLINE = 2;
@@ -52,6 +52,7 @@ class Server extends Model
         self::TYPE_VMESS,
         self::TYPE_TUIC,
         self::TYPE_SHADOWSOCKS,
+        self::TYPE_SOCKS,
     ];
 
     protected $table = 'v2_server';