test:test coverage for the components and services folder

Description:

Added and enhanced unit test cases to improve overall test coverage for both components and services modules.

• Improved coverage in src/components/ by:
  • Adding new test cases for HackdayProjectCard (previously 0% coverage)
  • Increasing branch coverage for SummerCard
  • Adding edge case and interaction tests for Navbar and Initiatives
• Improved coverage in src/services/api.ts by:
  • Covering previously untested lines (error handling scenarios)
  • Validating API success and failure responses
• Followed existing test patterns using Vitest + React Testing Library
• Covered:
  • Rendering
  • Props handling
  • Conditional rendering
  • User interactions
  • Error handling

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Type of Change:

• Bug Fix
  • Feature Development
  • Documentation

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Testing:

• Tested on desktop
  • Tested on mobile
  • Tested in different browsers

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Screenshots (if applicable):

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Video Demo

Not applicable

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Checklist:

• Code follows project style guidelines
  • Self-review completed
  • No console errors
  • TypeScript types are correct

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Related to #41 (closed)