Reorganize twenty-ui into best-practice component domains and per-component folders (#21745)

Reorganizes `twenty-ui`'s component organization to follow how the best
UI libraries (MUI, Mantine, Base UI, Polaris) structure their source,
now that the package has stabilized.

**Taxonomy** — dissolves the meaningless `components/` junk-drawer and
the 107-file `display/` mega-category. New domains/subpaths:
`data-display`, `typography`, `icon`, `surfaces`; `feedback` and
`layout` absorb the rest (banners/callout/info + placeholders →
feedback; modal/card → surfaces; motion + separators → layout).

**Per-component layout** — every component is now
`<domain>/<ComponentName>/<ComponentName>.tsx` with colocated
styles/stories/types, `internal/` for private helpers and `parts/` for
re-exported compound sub-parts. The redundant inner `/components/` is
gone. `icon` and `json-visualizer` are kept as cohesive subsystems.

**Also:** adds a tree-shakeable root barrel (`import { Button } from
'twenty-ui'`), the generator now owns `individual-entry.ts`, and a real
barrel-leak bug is fixed (private `internals/` parts were leaking into
the public API).

Consumer imports (~1.2k files) and the `twenty-sdk` UI aggregator were
updated by codemod. The change is **export-neutral** except 16
intentionally-removed private internals symbols (all verified
unconsumed). Gates green: typecheck, lint, build, size-limit, storybook.


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packages/twenty-ui/src/input/RoundedIconButton/RoundedIconButton.module.scss

@@ -0,0 +1,35 @@
+.button {
+  align-items: center;
+  background: var(--t-color-blue);
+  border: none;
+  border-radius: 50%;
+  color: var(--t-font-color-inverted);
+  cursor: pointer;
+  display: flex;
+  justify-content: center;
+  outline: none;
+  padding: 0;
+  transition:
+    color 0.1s ease-in-out,
+    background 0.1s ease-in-out;
+
+  &:hover:not(:disabled) {
+    background: var(--t-color-blue10);
+  }
+
+  &:disabled {
+    background: var(--t-background-quaternary);
+    color: var(--t-font-color-tertiary);
+    cursor: default;
+  }
+}
+
+.small {
+  height: 20px;
+  width: 20px;
+}
+
+.medium {
+  height: 24px;
+  width: 24px;
+}

packages/twenty-ui/src/input/RoundedIconButton/RoundedIconButton.module.scss.d.ts

@@ -0,0 +1,6 @@
+declare const classNames: {
+  readonly button: 'button';
+  readonly small: 'small';
+  readonly medium: 'medium';
+};
+export default classNames;

packages/twenty-ui/src/input/RoundedIconButton/RoundedIconButton.tsx

@@ -0,0 +1,34 @@
+import { clsx } from 'clsx';
+import React, { useContext } from 'react';
+
+import { type IconComponent } from '@ui/icon';
+import { ThemeContext } from '@ui/theme-constants';
+
+import styles from './RoundedIconButton.module.scss';
+
+export type RoundedIconButtonSize = 'small' | 'medium';
+
+type RoundedIconButtonProps = {
+  Icon: IconComponent;
+  size?: RoundedIconButtonSize;
+} & React.ButtonHTMLAttributes<HTMLButtonElement>;
+
+export const RoundedIconButton = ({
+  Icon,
+  onClick,
+  disabled,
+  className,
+  size = 'small',
+}: RoundedIconButtonProps) => {
+  const { theme } = useContext(ThemeContext);
+
+  return (
+    <button
+      className={clsx(styles.button, styles[size], className)}
+      disabled={disabled}
+      onClick={onClick}
+    >
+      <Icon size={theme.icon.size.md} />
+    </button>
+  );
+};

packages/twenty-ui/src/input/RoundedIconButton/__stories__/RoundedIconButton.stories.tsx

@@ -0,0 +1,32 @@
+import { type Meta, type StoryObj } from '@storybook/react-vite';
+import { IconArrowRight } from '@ui/icon';
+import { ComponentDecorator } from '@ui/testing';
+import { expect, fn, userEvent, within } from 'storybook/test';
+import { RoundedIconButton } from '@ui/input/RoundedIconButton/RoundedIconButton';
+
+const clickJestFn = fn();
+
+const meta: Meta<typeof RoundedIconButton> = {
+  title: 'UI/Input/Button/RoundedIconButton',
+  component: RoundedIconButton,
+};
+
+export default meta;
+type Story = StoryObj<typeof RoundedIconButton>;
+
+export const Default: Story = {
+  // TODO(a11y): violations inherited from deprecated story; fix during a11y pass
+  parameters: { a11y: { test: 'todo' } },
+  decorators: [ComponentDecorator],
+  argTypes: { Icon: { control: false } },
+  args: { onClick: clickJestFn, Icon: IconArrowRight },
+  play: async ({ canvasElement }) => {
+    const canvas = within(canvasElement);
+
+    expect(clickJestFn).toHaveBeenCalledTimes(0);
+    const button = canvas.getByRole('button');
+    await userEvent.click(button);
+
+    expect(clickJestFn).toHaveBeenCalledTimes(1);
+  },
+};