Reorder task builder tabs and add step collapse controls

[beNative]

Summary

• reorder the task editor tabs so Steps is primary and Variables is secondary
• add collapse state management with expand/collapse-all controls for task steps, defaulting to collapsed when a task loads

Testing

• npm test
• npm run build

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https://chatgpt.com/codex/tasks/task_e_6901125f8f208332b7184be58d12b7fa