Refactor upgrade status to use Livewire instead of API endpoint

- Remove /api/upgrade-status endpoint and route
- Add getUpgradeStatus() method to Upgrade Livewire component
- Update frontend to call Livewire method via $wire.getUpgradeStatus()
- Simpler approach: no separate API, auth handled by Livewire

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

app/Livewire/Upgrade.php

@@ -4,6 +4,7 @@ namespace App\Livewire;
 
 use App\Actions\Server\UpdateCoolify;
 use App\Models\InstanceSettings;
+use App\Models\Server;
 use App\Services\ChangelogService;
 use Livewire\Component;
 
@@ -78,4 +79,71 @@ class Upgrade extends Component
             return handleError($e, $this);
         }
     }
+
+    public function getUpgradeStatus(): array
+    {
+        // Only root team members can view upgrade status
+        if (auth()->user()?->currentTeam()->id !== 0) {
+            return ['status' => 'none'];
+        }
+
+        $server = Server::find(0);
+        if (! $server) {
+            return ['status' => 'none'];
+        }
+
+        $statusFile = '/data/coolify/source/.upgrade-status';
+
+        try {
+            $content = instant_remote_process(
+                ["cat {$statusFile} 2>/dev/null || echo ''"],
+                $server,
+                false
+            );
+            $content = trim($content ?? '');
+        } catch (\Throwable $e) {
+            return ['status' => 'none'];
+        }
+
+        if (empty($content)) {
+            return ['status' => 'none'];
+        }
+
+        $parts = explode('|', $content);
+        if (count($parts) < 3) {
+            return ['status' => 'none'];
+        }
+
+        [$step, $message, $timestamp] = $parts;
+
+        // Check if status is stale (older than 10 minutes)
+        try {
+            $statusTime = new \DateTime($timestamp);
+            $now = new \DateTime;
+            $diffMinutes = ($now->getTimestamp() - $statusTime->getTimestamp()) / 60;
+
+            if ($diffMinutes > 10) {
+                return ['status' => 'none'];
+            }
+        } catch (\Throwable $e) {
+            return ['status' => 'none'];
+        }
+
+        if ($step === 'error') {
+            return [
+                'status' => 'error',
+                'step' => 0,
+                'message' => $message,
+            ];
+        }
+
+        $stepInt = (int) $step;
+        $status = $stepInt >= 6 ? 'complete' : 'in_progress';
+
+        return [
+            'status' => $status,
+            'step' => $stepInt,
+            'message' => $message,
+        ];
+    }
 }