feat: implement server icon customization with AJAX support

extensions/Servers/Proxmox/Http/Controllers/ServerIconController.php

@@ -0,0 +1,39 @@
+<?php
+
+namespace Paymenter\Extensions\Servers\Proxmox\Http\Controllers;
+
+use Illuminate\Http\Request;
+use Illuminate\Support\Facades\Auth;
+use Paymenter\Extensions\Servers\Proxmox\Models\Server;
+
+class ServerIconController
+{
+    public function update(Request $request, $serverId)
+    {
+        $request->validate([
+            'icon' => 'nullable|string|max:64',
+            'color' => 'nullable|string|max:32',
+        ]);
+
+        $server = Server::where('id', $serverId)
+            ->where('user_id', Auth::id())
+            ->firstOrFail();
+
+        $server->user_set_icon = $request->input('icon');
+        $server->user_set_icon_color = $request->input('color');
+        $server->save();
+
+        return response()->json(['success' => true]);
+    }
+
+    public function get($serverId)
+    {
+        $server = Server::where('id', $serverId)
+            ->where('user_id', Auth::id())
+            ->firstOrFail();
+        return response()->json([
+            'icon' => $server->user_set_icon,
+            'color' => $server->user_set_icon_color,
+        ]);
+    }
+}