Add branch count control to Queue plans page.

Match Care/Frontdesk: branches stepper next to billing period, live
totals, and checkout charges for the selected seat count.

app/Services/Qms/PlanService.php

@@ -84,9 +84,7 @@ class PlanService
 
     public function proPriceMinor(Organization $organization): int
     {
-        $branches = max(1, $this->activeBranchCount($organization));
-
-        return $branches * $this->proPricePerBranchMinor();
+        return $this->priceForBranches('pro', $this->activeBranchCount($organization));
     }
 
     public function enterprisePricePerBranchMinor(): int
@@ -96,9 +94,26 @@ class PlanService
 
     public function enterprisePriceMinor(Organization $organization): int
     {
-        $branches = max(1, $this->activeBranchCount($organization));
+        return $this->priceForBranches('enterprise', $this->activeBranchCount($organization));
+    }
 
-        return $branches * $this->enterprisePricePerBranchMinor();
+    /** Fixed branch count × per-branch rate (checkout when the user picks seats). */
+    public function priceForBranches(string $plan, int $branches): int
+    {
+        $branches = max(1, $branches);
+        $rate = $plan === 'enterprise'
+            ? $this->enterprisePricePerBranchMinor()
+            : $this->proPricePerBranchMinor();
+
+        return $branches * $rate;
+    }
+
+    public function resolveCheckoutBranches(Organization $organization, int $requested): int
+    {
+        $branches = max(1, min(999, $requested));
+        $active = max(1, $this->activeBranchCount($organization));
+
+        return max($branches, $active);
     }
 
     public function canSubscribeEnterprise(Organization $organization): bool