[youtux]

Move the Unreleased changelog category headings into an RST comment so they can be copied when preparing a release without rendering empty sections.

Remove empty category headings from previous release notes.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 96.33%. Comparing base (05e0923) to head (7298cb7).
⚠️ Report is 2 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #854   +/-   ##
=======================================
  Coverage   96.33%   96.33%           
=======================================
  Files          55       55           
  Lines        2458     2458           
  Branches      137      137           
=======================================
  Hits         2368     2368           
  Misses         55       55           
  Partials       35       35           

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[Copilot]

🟢 Approval recommended

No active review issues are reported for this documentation-only changelog cleanup.

No open issues 🎉

What changed in this PR

This documentation-only PR keeps changelog categories available as a reusable template without displaying empty sections in rendered release notes.

Changes:

• Moves the Unreleased category headings into an RST comment for copying when preparing releases.
• Removes empty categories from releases 9.0.1, 9.0.0, and 8.1.0 while preserving their release entries.

File	Description
CHANGES.rst	Hides the reusable category template and removes empty historical sections.

_{Review effort: Balanced}