Refactor: Implement GraphQL fragments for WordPress API queries

[soumojit-D48]

What & Why

Refactored WordPress API queries to use centralized GraphQL fragments instead of duplicating field definitions across multiple functions.

Problem: Field definitions repeated in 10+ places
Solution: Created reusable fragment library
Result: ~200 lines of duplicate code eliminated

Changes

• Created lib/graphql-fragments.ts with 8 reusable fragments
• Refactored 11 query functions in lib/api.ts to use fragments
• No breaking changes - function signatures unchanged

Fragments Added

• AUTHOR_FIELDS_FRAGMENT - Author data
• POST_PREVIEW_FRAGMENT - Post listings
• FULL_POST_FRAGMENT - Complete post data
• PAGINATION_INFO_FRAGMENT - Pagination
• FEATURED_IMAGE_FRAGMENT, CATEGORY_FIELDS_FRAGMENT, SEO_FIELDS_FRAGMENT, TAG_FIELDS_FRAGMENT

Testing

✅ Tested locally - all pages work as expected:

• Home page loads correctly
• Technology & Community categories display posts
• Post detail pages show all data
• Author pages functional
• Search works properly

No visual changes, no console errors.

Impact

Before:

// Repeated everywhere
author {
  node {
    name
    firstName
    lastName
    avatar { url }
  }
}

After:

${AUTHOR_FIELDS_FRAGMENT}
author {
  node {
    ...AuthorFields
  }
}

---

Benefits: Easier maintenance, single source of truth for schema changes, cleaner code.

[soumojit-D48]

Hi @Surajiitmjnu @amaan-bhati @Achanandhi-M ,
I’ve opened this PR,
Please let me know it is actually helpfull or not, I am waiting for your review. Thanks!