Add customer names on the ledger, staff session login, and exclusive jobs.events.

Account-balance stores display names and looks up by name. Edge writes
names on customer create/edit; staff UIs join from edge when needed.
New verae-staff-session issues a host cookie; department HTML redirects
when STAFF_AUTH=1. JOBS_EVENTS_EXCLUSIVE lets jobs-events own the durable
consumer. Catalog index is cards; disabled fleet machines are grey.

packages/zappier-account-balance/test/books.test.js

@@ -24,6 +24,14 @@ test('adjust credits prepaid and statement lists credits usage payments', () =>
   assert.equal(st.payments[0].kind, 'payment');
 });
 
+test('customer.put stores display name and lookup by name', () => {
+  const books = new AccountBooks();
+  handle(SUBJECTS.CUSTOMER_PUT, { customerId: 'cust_1', name: 'Ada (free)' }, books);
+  const st = handle(SUBJECTS.STATEMENT_GET, { customerId: 'Ada (free)' }, books);
+  assert.equal(st.customerId, 'cust_1');
+  assert.equal(st.name, 'Ada (free)');
+});
+
 test('persist round-trip keeps prepaid', () => {
   const dir = fs.mkdtempSync(path.join(os.tmpdir(), 'books-'));
   process.env.BOOKS_PATH = path.join(dir, 'books.json');

packages/zappier-account-balance/test/health.test.js

@@ -1,6 +1,8 @@
 import { test } from 'node:test';
 import assert from 'node:assert/strict';
 import { spawn } from 'node:child_process';
+import fs from 'node:fs';
+import os from 'node:os';
 import path from 'node:path';
 import { fileURLToPath } from 'node:url';
 
@@ -8,9 +10,10 @@ const root = path.join(path.dirname(fileURLToPath(import.meta.url)), '..');
 
 test('account-balance health and statement', async () => {
   const port = 18010;
+  const books = path.join(os.tmpdir(), `books-health-${Date.now()}.json`);
   const child = spawn(process.execPath, ['src/server.js'], {
     cwd: root,
-    env: { ...process.env, PORT: String(port) },
+    env: { ...process.env, PORT: String(port), BOOKS_PATH: books },
     stdio: ['ignore', 'pipe', 'pipe'],
   });
   await new Promise((r) => setTimeout(r, 400));
@@ -26,5 +29,6 @@ test('account-balance health and statement', async () => {
     assert.equal(st.prepaidCents, 200);
   } finally {
     child.kill('SIGTERM');
+    fs.rmSync(books, { force: true });
   }
 });