feat: meilisearch rework

[andrey-hrinchenko]

https://app.notion.com/p/Meilisearch-accuracy-38b36e86b6ce8058b24beb4645c45b6d?d=7e936e86b6ce82899caa8311cf77f58d&source=copy_link

Summary by CodeRabbit

• New Features
  • Added Meilisearch administration with configurable search profiles, synchronisation controls, service status, and search testing.
  • Added autocomplete results for products, categories, brands, and content.
  • Product searches now support variant-specific titles, links, and initial variant selection.
  • Added content indexing for published articles and pages.
• Improvements
  • Catalogue search now supports profile-specific settings, improved ranking, facets, sorting, and resilient fallback results.
  • Search indexes are synchronised automatically on a regular schedule.
• Bug Fixes
  • Improved autocomplete visibility and request handling for empty or short queries.

[greptile-apps]

Greptile Summary

This PR reworks Meilisearch-backed catalog and content search.

• Adds configurable search profiles, administration endpoints, synchronization jobs, and index management.
• Adds storefront autocomplete across products, categories, brands, articles, and pages.
• Adds variant-aware product search links and selection.
• Adds a bounded Medusa catalog fallback when Meilisearch is unavailable.
• Fixes the previously reported content-document deletion ID and fallback pagination metadata mismatches.

Confidence Score: 5/5

The PR appears safe to merge based on the eligible follow-up findings.

No blocking failure remains; the content-removal path now targets the indexed underscore-delimited ID, and degraded catalog responses use the database query count to preserve pagination.

Important Files Changed

Filename	Overview
apps/medusa-be/src/modules/meilisearch/content-events.ts	Reconciles CMS publication changes with content indexes and now uses the same underscore-delimited document ID as normal indexing.
apps/medusa-be/src/modules/meilisearch/documents.ts	Builds normalized product and content search documents, including stable content IDs and storefront links.
apps/medusa-be/src/api/store/catalog/products/route.ts	Implements profile-backed catalog search and now derives degraded-mode pagination from Medusa query metadata.
apps/medusa-be/src/modules/meilisearch/synchronize.ts	Implements full and incremental synchronization of profile-specific search indexes.
apps/medusa-be/src/api/store/search/autocomplete/route.ts	Adds multi-index autocomplete results for products, taxonomy entities, and CMS content.
apps/herbatika/src/components/search-results.tsx	Extends the search page with related category, brand, and content results alongside product listings.
apps/herbatika/src/components/product-detail/use-product-detail-data.ts	Selects a requested search-result variant on product-detail initialization while retaining first-variant fallback behavior.

Sequence Diagram

sequenceDiagram
  participant CMS as Payload CMS
  participant API as Medusa Backend
  participant Meili as Meilisearch
  participant Store as Herbatika Storefront
  CMS->>API: Content change webhook
  API->>Meili: Add or remove content document
  Store->>API: Catalog or autocomplete query
  API->>Meili: Search configured profile indexes
  Meili-->>API: Ranked products and related entities
  API-->>Store: Products, facets, pagination, and suggestions
  alt Meilisearch unavailable
    API->>API: Query bounded Medusa catalog fallback
    API-->>Store: Degraded response with database count
  end

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