Reseller-Customer companies linking optimization

^{Moderate Upgrade}

The Reseller-to-Customer and Customer-to-Reseller linking flows have been upgraded from legacy REST-based APIs to the Account GraphQL API. This migration addresses previous performance bottlenecks, specifically eliminating long-running queries that caused system timeouts.

📝 Note: The feature depends on the availability of the Account GraphQL API in the environment (specifically the accounts query with reseller-related filters).

Key highlights:

• Performance: Search query response times have been improved from ~50 seconds to near-instant results.
• API Migration: The search companies table and linking actions have been moved successfully from REST to GraphQL.
• Stability: Backend endpoints have been refactored to handle linking and unlinking more reliably, which eliminates "undefined" ID errors.
• Logic alignment: Timeout logic, validation alerts, and automated tests have been updated to match the new implementation.
• UI consistency: "Infinite loading" states have been resolved and pagination reset behaviors have been fixed for a smoother experience.

UI impact: While the layout and core business workflow remain the same, the following behavioral improvements have been implemented:

• The search results table no longer gets stuck in an infinite loading state.
• Pagination behaves correctly after clearing search input.
• Validation and alert messages (e.g., when trying to associate a company with itself) are displayed as expected.

Feature enablement

No feature enablement is required.

Setting enablement

No setting enablement is required.

Documentation

No Documentation update is required.