trunk
Reader: forward-compatible React 19 changes (#111508)
Reader: fix typo 'recieve' -> 'receive' in discover helper comment (#112523)
Reader: Remove Discover "First posts" tab (#109456)
Reader: show 404 for unrecognized Reader paths instead of hanging (#112696)
Add/markdown lint (#45571)
Rename .js to .jsx (try 2) (#110347)
Reader: relocate tags data hook to client/reader/data/tags (#111443)
Reader: Keep the primary panel visible between lazy-loaded pages (#112911)
Janitorial: Remove unused functions (#108174)