feat(billing) - facilitate top up in ai chat (#21645)

Today, when a trialing user hits their AI usage cap inside the Ask AI
chat, ending the trial bounces them to the Stripe billing portal (and,
for card-less users, loses their place in the conversation). This PR
makes activating a paid plan / topping up credits feel seamless from
within the chat:

Trial users with a card on file activate their subscription in place,
without leaving the app.
Trial users without a card are sent to the Stripe payment-method portal
and, on return, the trial is ended automatically and they're dropped
back into the exact Ask AI thread they came from.
Credit-exhaustion and trial banners now reflect whether a payment method
exists (Add Credit Card vs Subscribe Now / End Trial Period) and upgrade
inline via a confirmation modal instead of redirecting to Settings.


Uploading Screen Recording 2026-06-16 at 07.51.12.mov…


https://github.com/user-attachments/assets/4ea77273-da63-4b32-b6f1-5ac9e9560651



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packages/twenty-front/src/modules/app/components/AppRouterProviders.tsx

@@ -19,6 +19,7 @@ import { UserMetadataProviderInitialEffect } from '@/metadata-store/effect-compo
 import { ApolloCoreProvider } from '@/object-metadata/components/ApolloCoreProvider';
 import { PreComputedChipGeneratorsProvider } from '@/object-metadata/components/PreComputedChipGeneratorsProvider';
 import { ApolloAdminProvider } from '@/settings/admin-panel/apollo/components/ApolloAdminProvider';
+import { EndTrialAfterPaymentMethodGater } from '@/settings/billing/components/EndTrialAfterPaymentMethodGater';
 
 import { CommandRunner } from '@/command-menu-item/engine-command/components/CommandRunner';
 import { SSEProvider } from '@/sse-db-event/components/SSEProvider';
@@ -66,6 +67,7 @@ export const AppRouterProviders = () => {
                               <DialogManager>
                                 <StrictMode>
                                   <PromiseRejectionEffect />
+                                  <EndTrialAfterPaymentMethodGater />
                                   <GotoHotkeysEffectsProvider />
                                   <PageTitle title={pageTitle} />
                                   <PageFavicon />