feat: [3/n] Add Columns Picker to Workflows List

[adhityamamallan]

Summary

Add and integrate new Columns Picker with Workflow List.

• Add WorkflowsListColumnsPicker component with drag-and-drop reordering, search filtering, and toggle selection
• Integrate columns picker into workflows header via columnsPickerProps (replaced showColumnsPicker boolean)
• Add react-movable to esModules config for Jest (dependency of Baseweb's Drag and Drop List)

Test plan

Unit tests + ran locally.

Screen.Recording.2026-04-07.at.15.50.50.mov

[gitar-bot]

Code Review ✅ Approved 1 resolved / 1 findings

Adds a Columns Picker component to the Workflows List for flexible column customization. The DATETIME matcher issue that previously returned empty strings for missing values has been resolved.

✅ 1 resolved

✅ Bug: DATETIME matcher returns empty string instead of null for missing values

📄 src/views/shared/workflows-list/config/workflows-list-columns.config.ts:100-110 📄 src/views/shared/workflows-list/helpers/get-workflows-list-column-from-search-attribute.ts:28-31 📄 src/views/shared/workflows-list/workflows-list.tsx:49-52
The generic DATETIME column matcher at line 108 returns String(value ?? '') when the value is missing, which produces an empty string ''. However, the "None" placeholder in workflows-list.tsx:49 only renders when content !== null. Other custom attribute types correctly return null for missing values (via the fallback in get-workflows-list-column-from-search-attribute.ts:30), so they show the "None" placeholder. This means missing datetime custom attributes will display as blank cells instead of showing "None", creating an inconsistent UX.

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