Changelog 2026-03-05 (Interactive Changelog Filters Pass 2)

Changed

• Added a sticky changelog filter control wrapper so category chips stay in view while scanning entries.
• Added live filter summary text showing visible entry count and current filter mode.
• Added an explicit no-results empty state when a selected filter has no matching entries.
• Updated filter script to manage summary + empty-state behavior alongside existing chip pressed states.

Why

• Improve changelog timeline scanning and reduce context loss while filtering through long entry lists.