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-server/src/database/commands/upgrade-version-command/2-15/2-15-instance-command-fast-1781280240009-add-has-payment-method-to-billing-customer.ts

@@ -0,0 +1,37 @@
+import { QueryRunner } from 'typeorm';
+
+import { RegisteredInstanceCommand } from 'src/engine/core-modules/upgrade/decorators/registered-instance-command.decorator';
+import { FastInstanceCommand } from 'src/engine/core-modules/upgrade/interfaces/fast-instance-command.interface';
+
+@RegisteredInstanceCommand('2.15.0', 1781280240009)
+export class AddHasPaymentMethodToBillingCustomerFastInstanceCommand
+  implements FastInstanceCommand
+{
+  public async up(queryRunner: QueryRunner): Promise<void> {
+    const tableExists = await queryRunner.query(
+      `SELECT 1 FROM pg_tables WHERE schemaname = 'core' AND tablename = 'billingCustomer'`,
+    );
+
+    if (tableExists.length === 0) {
+      return;
+    }
+
+    await queryRunner.query(
+      `ALTER TABLE "core"."billingCustomer" ADD COLUMN IF NOT EXISTS "hasPaymentMethod" boolean`,
+    );
+  }
+
+  public async down(queryRunner: QueryRunner): Promise<void> {
+    const tableExists = await queryRunner.query(
+      `SELECT 1 FROM pg_tables WHERE schemaname = 'core' AND tablename = 'billingCustomer'`,
+    );
+
+    if (tableExists.length === 0) {
+      return;
+    }
+
+    await queryRunner.query(
+      `ALTER TABLE "core"."billingCustomer" DROP COLUMN IF EXISTS "hasPaymentMethod"`,
+    );
+  }
+}