refactor(auth): enforce team member authorization across app

Restrict sensitive operations to admins/owners and hide sensitive data
from team members:
- Add authorization checks to Livewire components and API endpoints
- Restrict team members from accessing sensitive permissions and data
- Hide environment variable values from non-admin team members
- Update policies to enforce team-level admin status requirement
- Add useSensitivePermissions policy for read:sensitive tokens
- Improve disabled button UX with auth-specific tooltips
- Add authorization checks in middleware for API tokens

Closes authorization gaps in project management, server management,
and settings components.

app/Livewire/Team/AdminView.php

@@ -25,6 +25,9 @@ class AdminView extends Component
 
     public function submitSearch()
     {
+        if (! isInstanceAdmin()) {
+            return;
+        }
         if ($this->search !== '') {
             $this->users = User::where(function ($query) {
                 $query->where('name', 'like', "%{$this->search}%")
@@ -39,6 +42,9 @@ class AdminView extends Component
 
     public function getUsers()
     {
+        if (! isInstanceAdmin()) {
+            return;
+        }
         $users = User::where('id', '!=', auth()->id())->get();
         if ($users->count() > $this->number_of_users_to_show) {
             $this->lots_of_users = true;