Add NATS account-balance SoT and statement review for customers, CS, and sales

Internal billing now uses verae.billing.* request-reply and pubs. zappier-account-balance tracks prepaid, credits, usage, and payments. Portal, admin, CS, and sales all review the same statement. Independent Forgejo repos stay split via push-module-repos.

packages/zappier-sales-pricing/test/health.test.js

@@ -17,7 +17,42 @@ test('sales-pricing health', async () => {
   try {
     const r = await fetch(`http://127.0.0.1:${port}/health`);
     assert.equal((await r.json()).role, 'zappier-sales-pricing');
+    const home = await fetch(`http://127.0.0.1:${port}/`);
+    assert.equal(home.status, 200);
   } finally {
     child.kill('SIGTERM');
   }
 });
+
+test('sales review via account-balance HTTP', async () => {
+  const booksPort = 18016;
+  const salesPort = 18017;
+  const books = spawn(process.execPath, ['src/server.js'], {
+    cwd: path.join(root, '..', 'zappier-account-balance'),
+    env: { ...process.env, PORT: String(booksPort) },
+    stdio: ['ignore', 'pipe', 'pipe'],
+  });
+  const sales = spawn(process.execPath, ['src/server.js'], {
+    cwd: root,
+    env: {
+      ...process.env,
+      PORT: String(salesPort),
+      ACCOUNT_BALANCE_URL: `http://127.0.0.1:${booksPort}`,
+    },
+    stdio: ['ignore', 'pipe', 'pipe'],
+  });
+  await new Promise((r) => setTimeout(r, 500));
+  try {
+    await fetch(`http://127.0.0.1:${booksPort}/adjust`, {
+      method: 'POST',
+      headers: { 'content-type': 'application/json' },
+      body: JSON.stringify({ customerId: 'c-sales', cents: 300, reason: 'promo', agent: 'sales' }),
+    });
+    const st = await (await fetch(`http://127.0.0.1:${salesPort}/review/c-sales`)).json();
+    assert.equal(st.prepaidCents, 300);
+    assert.equal(st.source, 'account-balance');
+  } finally {
+    sales.kill('SIGTERM');
+    books.kill('SIGTERM');
+  }
+});