test: add GoalCard and AutoloanCard coverage

[ryzen-xp]

Description

Adds component tests for GoalCard and AutoloanCard to protect the monetary information displayed to users.

• Closes Issue 5 — Add component tests for GoalCard and AutoloanCard #85.

Changes

• Added 7 test cases for GoalCard

  • Valid props rendering
  • MXN currency formatting
  • Empty and zero states
  • Newly created goal state
  • Goal reached at exactly 100%
  • Progress capped when the goal is exceeded
  • Keyboard selection and card actions

• Added 7 test cases for AutoloanCard

  • Valid props rendering
  • USD currency formatting
  • Zero locked-balance state
  • Minimum loan boundary
  • Accessible payment schedule
  • Active loan state
  • Fully paid loan state

Test isolation

• Stellar contract functions are mocked
• Wallet signing is mocked
• Etherfuse rate data is mocked
• No Supabase, Stellar, Etherfuse, network access, or environment variables are required
• Tests do not depend on execution order
• Queries use roles and accessible text instead of CSS selectors

Verification

cd CreditRoot
npx vitest run

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[ryzen-xp]