Calculator launch page heading hierarchy skips from h1 to h3

Summary

The calculator launch page heading structure skips from the main h1 to feature-card h3 headings before any h2 appears.

Reproduction

1. Run the calculator locally with WEBSITE_PORT=3000 CALCULATOR_PORT=3001 bun run dev.
2. Open http://localhost:3001/us.
3. Run Lighthouse accessibility.
4. The page fails heading-order.

Expected

Heading levels should follow a coherent hierarchy.

Actual

The feature cards render as h3, while the first h2 headings appear later under sections like Recommended first steps.

Relevant code

• app/src/components/calculator/CalculatorLaunchPage.tsx
  • FeatureCard uses Title order={3}

Suggested direction

Either:

• promote those feature-card headings to h2, or
• demote them to non-heading text if they are not real sections

Start by running WEBSITE_PORT=3000 CALCULATOR_PORT=3001 bun run dev, open /us, and inspect app/src/components/calculator/CalculatorLaunchPage.tsx, especially FeatureCard and its Title order={3}. Decide whether the cards are sections or presentation text, then make the heading hierarchy coherent and rerun Lighthouse until the heading-order check passes.