payg bundle: address #7032 review nits (comments + i18n fallbacks)

- Comments claiming the metered subscription is auto-provisioned off the saved card (ActivationChoiceModal, FreePlanView) now describe it as a known, not-yet-wired follow-up rather than asserting it works.
- Corrects the price-authority narrative: the client-sent p_price_minor is a pre-mint display estimate only; create-payg-bundle-quote overwrites price_minor with the server-derived total once the Stripe quote is minted, and the Stripe line/amount is always server-derived (stripe.ts, BundleCheckoutModal).
- Aligns 'prepaid PDFs' code fallbacks with the 'prepaid credits' TOML (usageMeters, PrepaidCapacityCard).

Author: ConnorYoh

frontend/editor/src/cloud/components/shared/config/configSections/usageMeters.tsx

@@ -196,7 +196,7 @@ export function PrepaidCapacityMeterPanel({ snap }: { snap: PrepaidSnapshot }) {
       figure={snap.remaining.toLocaleString()}
       capSuffix={t(
         "payg.prepaid.meter.capSuffix",
-        "of {{total}} prepaid PDFs",
+        "of {{total}} prepaid credits",
         {
           total: snap.total.toLocaleString(),
         },

frontend/editor/src/portal/billing/stripe.ts

@@ -117,7 +117,12 @@ export interface BundleQuoteInput {
   provisionedMonthlyVolume: number;
   /** Size-folded run-credits = the Stripe line quantity when this quote is paid. */
   poolCredits: number;
-  /** Discounted total in minor units; null when the per-run rate is unknown. */
+  /**
+   * Client-estimated discounted total in minor units, persisted for the pre-mint display only; null
+   * when the per-run rate is unknown. NOT authoritative: once the Stripe quote is minted,
+   * create-payg-bundle-quote overwrites the row's price_minor with the server-derived total
+   * (Price x qty - amount_off), and the Stripe quote/invoice amount is server-derived regardless.
+   */
   priceMinor: number | null;
   currency: string;
   /** Affirmative consent to the prepaid→metered auto-transition (ARL/EULA §7.2). */

frontend/editor/src/portal/components/billing/ActivationChoiceModal.tsx

@@ -50,11 +50,14 @@ function DoorCard({
  * before any card is entered. Two door-cards, matching the demo —
  *
  *   - Pay as you go → the metered subscription checkout (spend limit + card).
- *   - Prepay a year → the discounted bundle (calculator + one-time payment); the
- *     backend silently stands up the metered subscription off the saved card so
- *     metering resumes when the pool empties, so no spend-limit step is needed.
+ *   - Prepay a year → the discounted bundle (calculator + one-time payment); no
+ *     spend-limit step, since the buyer commits to a fixed pool up front.
  *
  * Same per-PDF rate on both paths — prepay just front-loads two free months.
+ *
+ * Note: auto-standing-up the metered subscription off the saved card so metering
+ * resumes once a prepaid pool empties is a known follow-up, NOT yet wired — a
+ * prepay-only team isn't metered past its pool today.
  */
 export function ActivationChoiceModal({
   open,

frontend/editor/src/portal/components/billing/BundleCheckoutModal.tsx

@@ -218,10 +218,12 @@ export function BundleCheckoutModal({
   const [stripeQuoteSig, setStripeQuoteSig] = useState<string | null>(null);
   // The invoice generated when the quote is accepted (awaiting payment); null when simulated.
   const [invoice, setInvoice] = useState<BundleInvoice | null>(null);
-  // On resume, the total the quote was persisted at (server value), frozen so the receipt shows what
-  // the buyer actually quoted rather than a figure recomputed from a since-changed rate. Paired with
-  // the pool size it was persisted at — once the buyer edits the sizing (pool changes) we drop back to
-  // the live estimate, since editing re-mints and re-persists anyway.
+  // On resume, the total the quote was persisted at, frozen so the receipt shows what the buyer
+  // actually quoted rather than a figure recomputed from a since-changed rate. Once the Stripe quote
+  // has been minted this is the server-derived total (create-payg-bundle-quote overwrites price_minor
+  // with Price x qty - amount_off); before that it's the client estimate persisted at upsert. Paired
+  // with the pool size it was persisted at — once the buyer edits the sizing (pool changes) we drop
+  // back to the live estimate, since editing re-mints and re-persists anyway.
   const [persistedPriceMinor, setPersistedPriceMinor] = useState<number | null>(
     null,
   );

frontend/editor/src/portal/components/billing/FreePlanView.tsx

@@ -184,9 +184,11 @@ export function FreePlanView({ wallet, unsynced, onSubscribed }: Props) {
       )}
 
       {/* Prepay reuses the bundle modal (free team → first-purchase copy, no cap
-          step). On completion the webhook credits the pool AND silently creates
-          the metered subscription off the saved card, so we poll like the payg
-          path to flip the wallet to subscribed. */}
+          step). On completion the webhook credits the pool; we still poll onSubscribed
+          like the payg path, but flipping the wallet to subscribed depends on the
+          metered-subscription auto-provisioning off the saved card, a known follow-up
+          that's NOT yet wired — so for a prepay-only team this poll can just time out
+          until then. */}
       {wallet.teamId != null && (
         <BundleCheckoutModal
           open={step === "prepay"}

frontend/editor/src/portal/components/billing/PrepaidCapacityCard.tsx

@@ -75,7 +75,7 @@ export function PrepaidCapacityCard({
         figure={remaining.toLocaleString()}
         capSuffix={t(
           "portal.billing.prepaid.capSuffix",
-          "of {{total}} prepaid PDFs",
+          "of {{total}} prepaid credits",
           {
             total: total.toLocaleString(),
           },