Make cashier billing invoices actionable for walk-up payment.

Clarify booth Call next vs unpaid invoice list, and expose Pay/View row actions so cashiers can open bills when the booth queue is empty.

Co-authored-by: Cursor <cursoragent@cursor.com>

tests/Feature/CareBillTest.php

@@ -158,4 +158,39 @@ class CareBillTest extends TestCase
             ->assertOk()
             ->assertSee('INV-');
     }
+
+    public function test_cashier_bills_index_links_each_invoice_for_payment(): void
+    {
+        $this->actingAs($this->user)
+            ->post(route('care.bills.generate', $this->visit));
+
+        $bill = Bill::firstOrFail();
+
+        $this->actingAs($this->user)
+            ->get(route('care.bills.index'))
+            ->assertOk()
+            ->assertSee($bill->invoice_number)
+            ->assertSee(route('care.bills.show', $bill), false)
+            ->assertSee('Pay')
+            ->assertSee('Actions');
+
+        $this->actingAs($this->user)
+            ->get(route('care.bills.show', $bill))
+            ->assertOk()
+            ->assertSee('Record payment');
+    }
+
+    public function test_call_next_empty_booth_explains_walk_up_invoices(): void
+    {
+        \Illuminate\Support\Facades\Http::fake();
+
+        $settings = $this->organization->settings ?? [];
+        $settings['queue_integration_enabled'] = true;
+        $this->organization->update(['settings' => $settings]);
+
+        $this->actingAs($this->user)
+            ->post(route('care.bills.call-next'), ['branch_id' => Branch::firstOrFail()->id])
+            ->assertRedirect()
+            ->assertSessionHas('info', 'No patients waiting at the billing booth. Open an unpaid invoice below to record a walk-up payment.');
+    }
 }