fix(security): prevent snapshot replay in API token permission checks

Never trust Livewire component properties for authorization decisions, as
snapshots can be replayed from another user's session. Re-evaluate all
permission checks fresh using auth()->user()->can() against current policies
to ensure the authenticated user is being authorized, not a replayed copy.

- Replace cached canUse* booleans with fresh policy evaluation
- Add comprehensive security tests for token creation permissions
- Update API authorization tests to verify middleware blocking behavior

tests/Feature/Authorization/ApiTokenPermissionTest.php

@@ -1,5 +1,6 @@
 <?php
 
+use App\Models\InstanceSettings;
 use App\Models\Team;
 use App\Models\User;
 use Illuminate\Foundation\Testing\RefreshDatabase;
@@ -7,6 +8,8 @@ use Illuminate\Foundation\Testing\RefreshDatabase;
 uses(RefreshDatabase::class);
 
 beforeEach(function () {
+    InstanceSettings::updateOrCreate(['id' => 0], ['is_api_enabled' => true]);
+
     $this->team = Team::factory()->create();
     $this->user = User::factory()->create();
     $this->team->members()->attach($this->user->id, ['role' => 'owner']);