feat(launch): security and correctness fixes for 2026-05-01 launch

Day-of-launch deep-dive audit and remediation. 11 issues fixed across
security, correctness, and reliability. Tests: 698 → 758 passing
(+60), 0 failing, 2 skipped.

CRITICAL (security)

Fix #1 — HELCIM_API_TOKEN removed from runtimeConfig.public; dead
useHelcim.js deleted. Production token MUST BE ROTATED post-deploy
(was previously exposed in window.__NUXT__ payload).

Fix #2 — /api/helcim/customer gated with origin check + per-IP/email
rate limit + magic-link email verification (replaces unauthenticated
setAuthCookie). Adds payment-bridge token for paid-tier signup so
users can complete Helcim checkout before email verify. New utils:
server/utils/{magicLink,rateLimit}.js. UX: signup success copy now
prompts user to check email.

Fix #3 — /api/events/[id]/payment deleted (dead code with unauth
member-spoof bypass — processHelcimPayment was a permanent stub).
Removes processHelcimPayment export and eventPaymentSchema.

Fix #4 — /api/helcim/initialize-payment re-derives ticket amount
server-side via calculateTicketPrice and calculateSeriesTicketPrice.
Adds new series_ticket metadata type (was being shoved through
event_ticket with seriesId in metadata.eventId).

Fix #5 — /api/helcim/customer upgrades existing status:guest members
in place rather than rejecting with 409. Lowercases email at lookup;
preserves _id so prior event registrations stay linked.

HIGH (correctness / reliability)

Fix #6 — Daily reconciliation cron via Netlify scheduled function
(@daily). New: netlify.toml, netlify/functions/reconcile-payments.mjs,
server/api/internal/reconcile-payments.post.js. Shared-secret auth
via NUXT_RECONCILE_TOKEN env var. Inline 3-retry exponential backoff
on Helcim transactions API.

Fix #7 — validateBeforeSave: false on event subdoc saves (waitlist
endpoints) to dodge legacy location validators.

Fix #8 — /api/series/[id]/tickets/purchase always upserts a guest
Member when caller is unauthenticated, mirrors event-ticket flow
byte-for-byte. SeriesPassPurchase.vue adds guest-account hint and
client auth refresh on signedIn:true response.

Fix #9 — /api/members/cancel-subscription leaves status active per
ratified bylaws (was pending_payment). Adds lastCancelledAt audit
field on Member model. Indirectly fixes false-positive
detectStuckPendingPayment admin alert for cancelled members.

Fix #10 — /api/auth/verify uses validateBody with strict() Zod schema
(verifyMagicLinkSchema, max 2000 chars).

Fix #11 — 8 vitest cases for cancel-subscription handler (was
uncovered).

Specs and audit at docs/superpowers/specs/2026-04-25-fix-*.md and
docs/superpowers/plans/2026-04-25-launch-readiness-fixes.md.
LAUNCH_READINESS.md updated with new test count, 3 deploy-time
tasks (rotate Helcim token, set NUXT_RECONCILE_TOKEN, verify
Netlify scheduled function), and Fixed-2026-04-25 fix log.

tests/server/config/__snapshots__/runtime-config-public.test.js.snap

@@ -0,0 +1,11 @@
+// Vitest Snapshot v1, https://vitest.dev/guide/snapshot.html
+
+exports[`runtimeConfig.public > matches public runtime config snapshot 1`] = `
+[
+  "appUrl",
+  "cloudinaryCloudName",
+  "comingSoon",
+  "helcimAccountId",
+  "helcimPortalUrl",
+]
+`;

tests/server/config/runtime-config-public.test.js

@@ -0,0 +1,36 @@
+import { describe, it, expect, beforeAll } from 'vitest'
+
+// nuxt.config.ts uses the auto-imported defineNuxtConfig() global. Stub it to
+// the identity function so we can dynamically import the config in node and
+// assert against the actual runtimeConfig object the build will use.
+let nuxtConfig
+
+beforeAll(async () => {
+  globalThis.defineNuxtConfig = (config) => config
+  const mod = await import('../../../nuxt.config.ts')
+  nuxtConfig = mod.default
+})
+
+describe('runtimeConfig.public', () => {
+  it('does not expose helcimToken in runtimeConfig.public', () => {
+    expect('helcimToken' in nuxtConfig.runtimeConfig.public).toBe(false)
+  })
+
+  it('does not expose any *ApiToken or *Secret keys in runtimeConfig.public', () => {
+    // Keys that are intentionally public despite matching the pattern.
+    const allowlist = new Set(['helcimAccountId', 'cloudinaryCloudName'])
+    const sensitivePattern = /token|secret|key$/i
+
+    const violations = Object.keys(nuxtConfig.runtimeConfig.public).filter(
+      (key) => sensitivePattern.test(key) && !allowlist.has(key)
+    )
+
+    expect(violations).toEqual([])
+  })
+
+  it('matches public runtime config snapshot', () => {
+    // Snapshot only the sorted key list, not values (values come from env).
+    const sortedKeys = Object.keys(nuxtConfig.runtimeConfig.public).sort()
+    expect(sortedKeys).toMatchSnapshot()
+  })
+})