Excerpt Generation: Synchronize generating state across inline and modal buttons

[Infinite-Null]

What?

Consolidates the excerpt generation status across the inline and modal excerpt generation buttons so that both UI elements reflect the generating state simultaneously.

Why?

Previously, the inline button and modal/panel button each maintained independent isGenerating local component states. If a user clicked the inline button and then opened the modal, the modal button remained enabled, allowing parallel duplicate API generation requests to be triggered. Now, when generation is active from either button, both buttons are disabled and show loading state.

Use of AI Tools

AI assistance: Yes
Tool(s): Claude Code
Model(s): Claude Sonnet 4.6
Used for: Validating bug, suggesting a fix.

Testing Instructions

1. Enable the Excerpt Generation experiment in the plugin settings.
2. Create or edit a post with content longer than 250 characters.
3. Open the sidebar in the post editor.
4. Click the inline Generate excerpt button next to the Excerpt link.
5. Open the Excerpt panel/modal while generation is in progress.
6. Verify that both the inline button and modal Generate excerpt button display "Generating…", are disabled, and show busy indicators.
7. Confirm that once generation finishes, both buttons return to normal state and the excerpt is updated.

Screencast

Before

Screen.Recording.2026-07-30.at.3.28.42.PM.mov

After

Screen.Recording.2026-07-30.at.3.25.32.PM.mov

Changelog Entry

Fixed - Synchronized generating state across inline and modal excerpt generation buttons.

[github-actions]

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Co-authored-by: Infinite-Null <ankitkumarshah@git.wordpress.org>
Co-authored-by: dkotter <dkotter@git.wordpress.org>

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 80.43%. Comparing base (a1ba294) to head (3e5a3ab).
⚠️ Report is 1 commits behind head on develop.

Additional details and impacted files

@@            Coverage Diff             @@
##             develop     #908   +/-   ##
==========================================
  Coverage      80.43%   80.43%           
  Complexity      2565     2565           
==========================================
  Files            110      110           
  Lines          10448    10448           
==========================================
  Hits            8404     8404           
  Misses          2044     2044           

Flag	Coverage Δ
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