fix: reduce auth hydration and stabilize signup

[marcusgrando]

Bug fix

What was the problem?

Login restored the account session with extra blocking calls in the critical path:

• sign-in analytics hydrated account/user data before switchAccount, duplicating /api/account/info and /api/user/me.
• account guard loaded /api/v3/contract/{clientId}/products through loadAccountHydration.
• account guard also loaded /edge_api/v4/service_orders only to derive hasActivePlan, even though /api/account/info already returns has_service_order_plan.

In the HAR, Contract took about 2.09s and Service Orders took about 2.93s after the duplicated account hydration.

Email sign-up had a separate issue: after the account was created, a post-success analytics tracking error could keep the UI on the sign-up form instead of showing the activation step. This left the user with a created but inactive account, which then produced User not activated. on login until activation was completed.

The post-activation paid plan step could also surface Stripe raw errors such as No such checkout.session when Stripe rejected a checkout session during confirmation. That request is made inside Stripe.js, so it may not show as a regular Console API request in DevTools.

Expected behavior

Login should restore the session and decide onboarding redirects without waiting for Contract or Service Orders product calls. Contract plan data should still load where it is actually used, such as Billing and Copilot.

Email sign-up should show the activation instructions after successful account creation, even if analytics tracking fails.

The paid plan checkout should refresh stale Stripe sessions instead of showing raw Stripe session identifiers to the user.

How was it solved

• Reused token/verify.user_tracking_info for email, MFA, and SSO sign-in tracking instead of pre-switch account hydration.
• Kept contract plan loading out of loadAccountHydration; Billing and Copilot still lazy-load it with loadContractData.
• Derived hasActivePlan from account/info.has_service_order_plan during account hydration.
• Removed ensureServiceOrdersList() from accountGuard, so Service Orders no longer blocks initial login navigation.
• Made email sign-up success tracking non-blocking so account activation UI still appears after a successful /signup response.
• Reused the existing stale checkout-session recovery path when Stripe rejects the session during signup plan submission.
• Updated tests for account hydration, sign-in tracking, account guard behavior, sign-up activation after tracking failures, and stale checkout-session recovery.

How to test

• ./node_modules/.bin/eslint src/helpers/account-data.js src/router/hooks/guards/accountGuard.js src/tests/helpers/account-data.test.js src/tests/router/hooks/guards/account-guard.test.js src/helpers/track-auth-event.js src/tests/helpers/track-auth-event.test.js
• ./node_modules/.bin/vitest run src/tests/helpers/account-data.test.js src/tests/router/hooks/guards/account-guard.test.js src/tests/helpers/track-auth-event.test.js src/tests/helpers/account-handler-switch-broadcast.test.js src/tests/helpers/account-handler-has-session.test.js src/tests/services/auth-services/verify-authentication-service.test.js src/tests/plugins/analytics/trackers/SignInTracker.test.js
• ./node_modules/.bin/eslint src/templates/signup-block/login-with-email-block.vue src/tests/templates/login-with-email-block.test.js src/services/signup-services/signup-service.js src/tests/services/signup-services/signup-service.test.js src/templates/signup-block/form-signup-block.vue src/templates/signup-block/account-activation.vue
• ./node_modules/.bin/vitest run src/tests/templates/login-with-email-block.test.js src/tests/services/signup-services/signup-service.test.js src/tests/views/signup-additional-data-view.test.js
• ./node_modules/.bin/eslint src/templates/checkout-block/checkout-plan-block.vue src/templates/checkout-block/payment-method-block.vue src/templates/checkout-block/helpers/stripe-error-mapper.js src/tests/templates/checkout-plan-block.test.js src/tests/templates/payment-method-block.test.js src/views/Signup/AdditionalDataView.vue
• ./node_modules/.bin/vitest run src/tests/templates/checkout-plan-block.test.js src/tests/templates/payment-method-block.test.js src/tests/views/signup-additional-data-view.test.js src/tests/composables/useCheckoutSessionPreparer.test.js src/tests/templates/pricing-calculation-block.test.js
• git diff --check