refactor(auth): enforce authorization checks across livewire components

Add authorization checks to multiple Livewire components to ensure users
have proper permissions before performing sensitive operations. This includes:

- Adding AuthorizesRequests trait to components handling deployments, backups,
  services, and configuration uploads
- Enforcing 'deploy', 'update', and 'manageBackups' authorization checks
- Adding instance admin check for system upgrade operations
- Improving database queries with team ownership scope
- Moving backup trigger from component to button with new backupNow() method

app/Livewire/Admin/Index.php

@@ -45,6 +45,9 @@ class Index extends Component
 
     public function submitSearch()
     {
+        if (Auth::id() !== 0 && ! session('impersonating')) {
+            return redirect()->route('dashboard');
+        }
         if ($this->search !== '') {
             $this->foundUsers = User::where(function ($query) {
                 $query->where('name', 'like', "%{$this->search}%")
@@ -55,6 +58,9 @@ class Index extends Component
 
     public function getSubscribers()
     {
+        if (Auth::id() !== 0 && ! session('impersonating')) {
+            return redirect()->route('dashboard');
+        }
         $this->inactiveSubscribers = Team::whereRelation('subscription', 'stripe_invoice_paid', false)->count();
         $this->activeSubscribers = Team::whereRelation('subscription', 'stripe_invoice_paid', true)->count();
     }