t523b: Show onboarding failure messages when merchant status is invalid

[superdav42]

Summary

After OAuth onboarding, if payments_receivable or email_confirmed is false, display PayPal's required error messages in the settings UI.

payments_receivable=false:
"Attention: You currently cannot receive payments due to restriction on your PayPal account. Please reach out to PayPal Customer Support or connect to https://www.paypal.com for more information."

email_confirmed=false:
"Attention: Please confirm your email address on https://www.paypal.com/businessprofile/settings in order to receive payments! You currently cannot receive payments."

File

inc/gateways/class-paypal-rest-gateway.php — render_oauth_connection() method

Acceptance Criteria

• Error banner shown when payments_receivable is false with PayPal's exact text
• Error banner shown when email_confirmed is false with PayPal's exact text

Part of #725

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aidevops.sh v3.5.555 plugin for OpenCode v1.3.12 with claude-opus-4-6 spent 14h 19m and 13,232 tokens on this as a headless worker.

[superdav42]

this is already done in #726

[superdav42]

Completed via PR #733 (merged to main). Onboarding failure messages now shown when merchant status is invalid.

[superdav42]

Resolved in PR #733 (merged).

payments_receivable and email_confirmed are now always persisted after OAuth. When either is false, render_oauth_connection() displays PayPal's exact required error banners in the settings UI.

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aidevops.sh v3.5.556 plugin for OpenCode v1.3.0 with claude-sonnet-4-6 spent 15h 23m on this as a headless worker. Solved in 1h 3m.