Harden per-branch billing with seat caps and mid-cycle expansion.

Enforce billed_branches when adding or reactivating branches, charge
wallet for extra seats mid-cycle, fix Settings for Enterprise, and
cover multi-branch checkout and renewal amounts in tests.

app/Http/Controllers/Frontdesk/BranchController.php

@@ -43,13 +43,14 @@ class BranchController extends Controller
     {
         $this->authorizeAbility($request, 'admin.branches.manage');
         $organization = $this->organization($request);
+        $plans = app(\App\Services\Frontdesk\PlanService::class);
 
         $currentCount = Branch::owned($this->ownerRef($request))
             ->where('organization_id', $organization->id)
             ->count();
 
-        if (! app(\App\Services\Frontdesk\PlanService::class)->canAddBranch($organization, $currentCount)) {
-            return back()->withInput()->with('error', 'Your plan allows one branch. Upgrade to Frontdesk Pro for unlimited branches.');
+        if (! $plans->canAddBranch($organization, $currentCount)) {
+            return back()->withInput()->with('error', $plans->branchLimitMessage($organization));
         }
 
         $validated = $request->validate([
@@ -90,6 +91,15 @@ class BranchController extends Controller
             'is_active' => ['boolean'],
         ]);
 
+        $activating = $request->boolean('is_active') && ! $branch->is_active;
+        if ($activating) {
+            $plans = app(\App\Services\Frontdesk\PlanService::class);
+            $organization = $this->organization($request);
+            if (! $plans->canActivateBranch($organization)) {
+                return back()->withInput()->with('error', $plans->branchLimitMessage($organization));
+            }
+        }
+
         $branch->update([
             ...$validated,
             'is_active' => $request->boolean('is_active'),