fix: Swiss API GET requests fail with content-type header + bot names not showing

1. ApiProxy was sending Content-Type: application/json on GET requests
   which the Swiss API rejects ("Body cannot be empty when content-type
   is set to application/json"). Now only sends Content-Type for
   POST/PATCH/PUT methods.

2. Players tab now reads bot name/rating from bot_metadata JSONB
   instead of non-existent player_name/rating columns.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

core/ApiProxy.php

@@ -15,7 +15,11 @@ class ApiProxy
 
     public static function swiss(string $method, string $path, ?array $body = null, ?string $token = null): array
     {
-        $headers = ['Content-Type: application/json'];
+        $headers = [];
+        $upperMethod = strtoupper($method);
+        if ($body !== null || in_array($upperMethod, ['POST', 'PATCH', 'PUT'])) {
+            $headers[] = 'Content-Type: application/json';
+        }
         $authToken = $token ?? self::getSwissToken();
         if ($authToken) {
             $headers[] = 'Authorization: Bearer ' . $authToken;

modules/tournaments/views/show.php

@@ -235,13 +235,19 @@ $tabs['arbiter'] = 'أدوات الحكم';
         </thead>
         <tbody>
             <?php foreach ($players as $i => $player): ?>
+            <?php
+            $meta = $player['bot_metadata'] ?? null;
+            if (is_string($meta)) $meta = json_decode($meta, true);
+            $playerName = $meta['name'] ?? $player['player_name'] ?? $player['player_id'];
+            $playerRating = $meta['rating'] ?? $player['rating'] ?? '-';
+            ?>
             <tr>
                 <td><?= $i + 1 ?></td>
                 <td class="font-medium">
-                    <?= View::e($player['player_name'] ?? $player['player_id']) ?>
+                    <?= View::e($playerName) ?>
                     <?php if (!empty($player['is_bot'])): ?><span class="badge badge-ghost" style="font-size:10px;margin-right:4px;">🤖</span><?php endif; ?>
                 </td>
-                <td class="tabular-nums"><?= $player['rating'] ?? 1500 ?></td>
+                <td class="tabular-nums"><?= $playerRating ?></td>
                 <td class="text-xs text-muted"><?= $player['registered_at'] ? date('Y/m/d H:i', strtotime($player['registered_at'])) : '-' ?></td>
                 <td>
                     <?php if (($player['status'] ?? '') === 'withdrawn'): ?>