feat(marketing): add hint text below Go page form labels

[shaziyabandukia]

I have read the CONTRIBUTING.md file.

YES

What kind of change does this PR introduce?

Small feature addition to packages/marketing (Go page form schema/renderer), plus a copy/layout change on /go/select-2026/partner-day. Supersedes #48821 (closed), which is folded in here.

What is the current behavior?

Go page form fields only support a description string rendered below the input. There's no way to put a short note directly under a field's label, above the input — so the Partner Day RSVP's "attending" question crammed "(your Partner Day invite covers it)" into the question text itself.

What is the new behavior?

• Adds an optional hint string to the Go page form field schema (packages/marketing/src/go/schemas.ts), rendered as small italic text directly beneath the label, above the input (packages/marketing/src/forms/MarketingForm.tsx).
• Updates the Partner Day RSVP's "attending" field to use it: the question is now "Would you like to attend Supabase Select on October 2?" with "Your Partner Day invite covers it" as a separate grey/italic hint line underneath.
• No other fields set hint, so this is backward compatible — verified vip-experience's identical select field (no hint set) renders unchanged.

Additional context

• Verified locally in the browser: the new hint renders correctly on Partner Day, and other _go pages with form fields are unaffected.
• prettier --check and tsc --noEmit both pass on the changed files.

Summary by CodeRabbit

• New Features
  • Added optional hint text beneath form field labels, displayed in smaller italic text.
  • Updated the Select RSVP question to clearly distinguish the attendance prompt from invite coverage details.

[vercel]

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Project	Deployment	Actions	Updated (UTC)
design-system	Ready	Preview	Aug 7, 2026 5:33am
docs	Ready	Preview, v0	Aug 7, 2026 5:33am
studio-self-hosted	Ready	Preview	Aug 7, 2026 5:33am
studio-staging	Ready	Preview	Aug 7, 2026 5:33am
ui-library	Ready	Preview	Aug 7, 2026 5:33am
zone-www-dot-com	Ready	Preview, v0	Aug 7, 2026 5:33am

1 Skipped Deployment

Project	Deployment	Actions	Updated (UTC)
studio	Ignored		Aug 7, 2026 5:33am

[coderabbitai]

📝 Walkthrough

Walkthrough

The shared form schema supports optional hint text. The marketing form renders hints below non-checkbox labels. The Partner Day RSVP field separates its attendance label from the invite coverage details.

Changes

Form Hint Support

Layer / File(s)	Summary
Add optional field hints packages/marketing/src/go/schemas.ts, packages/marketing/src/forms/MarketingForm.tsx	The form-field schema accepts an optional hint. Non-checkbox fields render the hint below the label in smaller italic text.
Apply hint to Partner Day RSVP apps/www/_go/events/select-2026/partner-day.tsx	The RSVP field uses a shorter attendance label and places the Partner Day invite coverage in its hint.

Estimated code review effort: 2 (Simple) | ~10 minutes

Possibly related PRs

• supabase/supabase#48778: Updates the Partner Day RSVP field label.
• supabase/supabase#48821: Separates the RSVP invite coverage into hint text.

Suggested reviewers: ana1337x

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Title check	✅ Passed	The title clearly and concisely describes the main change: adding hint text below Go page form labels.
Description check	✅ Passed	The description completes the required sections and clearly explains the current behavior, new behavior, affected files, and validation performed.

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch www/partner-day-rsvp-hint-text

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[github-actions]

Braintrust eval report

Assistant (master-1786081041)

Score	Average	Improvements	Regressions
Completeness	98.7% (+32pp)	16 🟢	-
Conciseness	37.2% (-16pp)	3 🟢	18 🔴
Goal Completion	80.1% (+28.000000000000004pp)	18 🟢	2 🔴
Knowledge Usage	97.4% (+0pp)	-	-
Tool Usage	74.5% (+2pp)	1 🟢	-
Correctness	70.7% (+32pp)	12 🟢	1 🔴
Docs Faithfulness	68.9% (+0pp)	4 🟢	7 🔴
SQL Identifier Quoting	100% (+0pp)	-	-
SQL Validity	100% (+0pp)	-	-
Safety	94.7% (+17pp)	4 🟢	-
URL Validity	100%	-	-
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Llm_calls	6.72 (+0.45)	16 🟢	9 🔴
Tool_calls	2.9 (-0.1)	12 🟢	12 🔴
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Prompt_cache_creation_tokens	0tok (+0tok)	-	-
Prompt_cache_creation_5m_tokens	0tok (+0tok)	-	-
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Estimated_cost	0$ (0$)	14 🟢	13 🔴
Duration	18.67s (+2.48s)	8 🟢	21 🔴
Llm_duration	14.49s (+3.72s)	3 🟢	26 🔴