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/src/nats-billing.js

@@ -0,0 +1,17 @@
+export const SUBJECTS = { STATEMENT_GET: 'verae.billing.statement.get' };
+
+export async function billingRequest(subject, payload) {
+  const url = process.env.NATS_URL;
+  if (!url) return null;
+  try {
+    const { connect, StringCodec } = await import('nats');
+    const nc = await connect({ servers: url.split(','), name: 'zappier-sales-pricing' });
+    const sc = StringCodec();
+    const m = await nc.request(subject, sc.encode(JSON.stringify(payload)), { timeout: 2000 });
+    const out = JSON.parse(sc.decode(m.data) || '{}');
+    await nc.close();
+    return out;
+  } catch {
+    return null;
+  }
+}

packages/zappier-sales-pricing/src/server.js

@@ -1,10 +1,18 @@
 #!/usr/bin/env node
 /** Sales department: per-customer multiplier / tier. Writes through zappier-edge. */
+import fs from 'node:fs';
 import http from 'node:http';
+import path from 'node:path';
+import { fileURLToPath } from 'node:url';
+
+import { SUBJECTS, billingRequest } from './nats-billing.js';
+
+const PUBLIC = path.join(path.dirname(fileURLToPath(import.meta.url)), '..', 'public');
 
 const PORT = Number(process.env.PORT || 3012);
 const EDGE = (process.env.ZAPPIER_ADMIN_URL || 'http://127.0.0.1:3000').replace(/\/$/, '');
 const KEY = process.env.ZAPPIER_ADMIN_KEY || 'admin-dev-key';
+const BOOKS = (process.env.ACCOUNT_BALANCE_URL || 'http://127.0.0.1:3010').replace(/\/$/, '');
 
 async function edge(pathname, { method = 'GET', body } = {}) {
   const r = await fetch(`${EDGE}${pathname}`, {
@@ -27,9 +35,23 @@ const server = http.createServer(async (req, res) => {
     res.end(JSON.stringify(obj));
   };
   try {
+    if (req.method === 'GET' && (url.pathname === '/' || url.pathname === '/index.html')) {
+      res.writeHead(200, { 'content-type': 'text/html; charset=utf-8' });
+      res.end(fs.readFileSync(path.join(PUBLIC, 'index.html')));
+      return;
+    }
     if (req.method === 'GET' && url.pathname === '/health') {
       return json(200, { ok: true, role: 'zappier-sales-pricing' });
     }
+    const review = url.pathname.match(/^\/review\/([^/]+)$/);
+    if (req.method === 'GET' && review) {
+      const nats = await billingRequest(SUBJECTS.STATEMENT_GET, { customerId: review[1] });
+      if (nats) return json(200, { ...nats, source: 'nats' });
+      const r = await fetch(`${BOOKS}/statement/${review[1]}`);
+      if (r.ok) return json(200, { ...(await r.json()), source: 'account-balance' });
+      const e = await edge(`/admin/api/statement/${review[1]}`);
+      return json(e.status, e.body);
+    }
     const quote = url.pathname.match(/^\/quotes\/([^/]+)$/);
     if (req.method === 'GET' && quote) {
       const forwarded = await edge(`/admin/api/sales/quote/${quote[1]}`);