Limit Pro to 3 branches and leave Business unlimited.

Enforce plan location caps in SubscriptionService, surface upgrade
copy on plans and branch settings, and cover the limits in tests.

resources/views/pos/branches/index.blade.php

@@ -52,6 +52,14 @@
                 <p class="mt-4 rounded-xl bg-amber-50 px-4 py-3 text-sm text-amber-900">
                     Multi-branch POS is available on <a href="{{ route('pos.pro.index') }}" class="font-semibold underline">Pro or Business</a>.
                 </p>
+            @else
+                @if (! $canAddBranch)
+                    <p class="mt-4 rounded-xl bg-amber-50 px-4 py-3 text-sm text-amber-900">
+                        You've reached the branch limit on Pro (up to 3).
+                        <a href="{{ route('pos.pro.index') }}" class="font-semibold underline">Upgrade to Business</a>
+                        for unlimited locations.
+                    </p>
+                @endif
             @endunless
         </x-settings.card>
     </x-settings.page>

resources/views/pos/pro/index.blade.php

@@ -61,6 +61,7 @@
                 <x-plan-tier-price :currency="$currency" :monthly-minor="$proPriceMinor" />
                 <ul class="mt-5 flex-1 space-y-2 text-sm text-slate-700">
                     <li>Unlimited products</li>
+                    <li>Up to 3 locations</li>
                     <li>Restaurant mode</li>
                     <li>Catalog import</li>
                 </ul>
@@ -81,7 +82,7 @@
                 <x-plan-tier-price :currency="$currency" :monthly-minor="$enterprisePriceMinor" dark />
                 <ul class="mt-5 flex-1 space-y-2 text-sm text-slate-200">
                     <li>Everything in Pro</li>
-                    <li>Multi-location</li>
+                    <li>Unlimited locations</li>
                     <li>Advanced reporting</li>
                 </ul>
                 <div class="mt-6">

resources/views/pos/settings/_branches-section.blade.php

@@ -47,6 +47,14 @@
                 <a href="{{ route('pos.pro.index') }}" class="font-semibold underline">Pro or Business</a>.
                 Your account is limited to one branch.
             </p>
+        @else
+            @if (! empty($canManageBranches) && ! $canAddBranch)
+                <p class="rounded-xl bg-amber-50 px-4 py-3 text-sm text-amber-900">
+                    You've reached the branch limit on Pro (up to 3).
+                    <a href="{{ route('pos.pro.index') }}" class="font-semibold underline">Upgrade to Business</a>
+                    for unlimited locations.
+                </p>
+            @endif
         @endunless
     </div>
 </x-settings.card>