Add protein expression column to landscape view

[huanlity]

Summary

• add protein metadata loader and selection state mirroring the existing gene utilities
• extend the landscape UI to show a protein column with top-protein bars and callbacks that fetch cbp parquet data
• clear and synchronize protein selections across deck.gl interactions and reset protein bars on viewport changes

Testing

• npm run lint:js

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https://chatgpt.com/codex/tasks/task_b_68fa1ede6bec8331a305d7785df2f839