Fix: Redundant API requests for providers on settings page when multiple features share the same capability

[hbhalodia]

What?

Closes #541

Why?

• PR fixes the issue related to AI Settings page where same requests were being fired multiple times.
• For detail info - See Redundant API requests for providers on settings page when multiple features share the same capability #541

How?

• Use the approach to remove providers fetch logic to a custom hook and implement a module level cache for requests results based on capability.

Use of AI Tools

AI assistance: Yes
Tool(s): GitHub Copilot, Claude
Model(s): Opus 4.6
Used for: Providing suggestion on improvement based on issue. Reviwed the code generated manually and then raised the PR.

Testing Instructions

1. Open Page - options-general.php?page=ai-wp-admin, Enable model selection.
2. Enable all features.
3. Check the network request, it should only be 3 for now, text_generation, vision, image_generation, instead of individual request for each features.

Screenshots or screencast

Screen.Recording.2026-05-13.at.3.57.15.PM.mov

Changelog Entry

Changed - Deduplicate provider API requests on the settings page by caching fetches per capability, reducing redundant network calls.

[github-actions]

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 70.72%. Comparing base (27ac41f) to head (b7972a2).

Additional details and impacted files

@@            Coverage Diff             @@
##             develop     #542   +/-   ##
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  Coverage      70.72%   70.72%           
  Complexity      1144     1144           
==========================================
  Files             67       67           
  Lines           5510     5510           
==========================================
  Hits            3897     3897           
  Misses          1613     1613           

Flag	Coverage Δ
unit	70.72% <ø> (ø)

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