## Summary
Adds Notion-style resizable panels for the navigation drawer (left
sidebar) and command menu (right panel).
## Behavior
- **Hover** at panel edge → resize cursor appears
- **Click** → collapse/close the panel
- **Drag** → resize the panel (5px movement threshold to distinguish
from click)
## Constraints
| Panel | Min | Max | Default | Collapse Threshold |
|-------|-----|-----|---------|-------------------|
| Navigation Drawer | 180px | 350px | 220px | 150px |
| Command Menu | 320px | 600px | 400px | 250px |
## Performance Optimizations
- **CSS variables** for smooth 60fps resize (no React re-renders during
drag)
- **Table resize observer disabled** during panel resize to prevent
expensive recalculations
- **React.memo wrapper** on page body to prevent unnecessary re-renders
## Architecture
- `useResizablePanel` hook following the same pattern as
`useResizeTableHeader`
- `ResizablePanelEdge` - resize handle positioned at panel edge
- `ResizablePanelGap` - resize handle in the gap between panels
- `cssVariableEffect` - Recoil effect to sync CSS variables with state
## Refactoring
- Split `recoil-effects.ts` into separate files in `utils/recoil/` (one
export per file)
- Persist panel widths to localStorage via existing `localStorageEffect`
# Introduction
closes https://github.com/twentyhq/core-team-issues/issues/591
Same than for `twenty-shared` made in
https://github.com/twentyhq/twenty/pull/11083.
## TODO
- [x] Manual migrate twenty-website twenty-ui imports
## What's next:
- Generate barrel and migration script factorization within own package
+ tests
- Refactoring using preconstruct ? TimeBox
- Lint circular dependencies
- Lint import from barrel and forbid them
### Preconstruct
We need custom rollup plugins addition, but preconstruct does not expose
its rollup configuration. It might be possible to handle this using the
babel overrides. But was a big tunnel.
We could give it a try afterwards ! ( allowing cjs interop and stuff
like that )
Stuck to vite lib app
Closed related PRs:
- https://github.com/twentyhq/twenty/pull/11294
- https://github.com/twentyhq/twenty/pull/11203
Félix Malfait
