Add TextArea story

apps/storybook/stories/core/TextArea.stories.tsx

@@ -0,0 +1,96 @@
+import type { Meta, StoryObj } from '@storybook/react'
+import { TextArea } from '@surf-kit/core'
+
+const meta: Meta<typeof TextArea> = {
+  title: 'Core/TextArea',
+  component: TextArea,
+  argTypes: {
+    label: { control: 'text' },
+    description: { control: 'text' },
+    errorMessage: { control: 'text' },
+    placeholder: { control: 'text' },
+
+    // Optional props
+    value: { control: 'text' },
+    onChange: { action: 'onChange' }, // logs the value string when user types (for uncontrolled stories)
+
+    isDisabled: { control: 'boolean' },
+    isRequired: { control: 'boolean' },
+
+    rows: { control: { type: 'number', min: 1, max: 12, step: 1 } },
+    className: { control: 'text' },
+  },
+}
+
+export default meta
+type Story = StoryObj<typeof TextArea>
+
+export const Default: Story = {
+  args: {
+    label: 'Message',
+    placeholder: 'Type your message…',
+  },
+}
+
+export const WithDescription: Story = {
+  args: {
+    label: 'Message',
+    placeholder: 'Type your message…',
+    description: 'Add any extra context you think is helpful.',
+  },
+}
+
+export const WithError: Story = {
+  args: {
+    label: 'Message',
+    placeholder: 'Type your message…',
+    errorMessage: 'Message is required.',
+  },
+}
+
+export const Disabled: Story = {
+  args: {
+    label: 'Message',
+    placeholder: 'Type your message…',
+    isDisabled: true,
+  },
+}
+
+export const Required: Story = {
+  args: {
+    label: 'Message',
+    placeholder: 'Type your message…',
+    isRequired: true,
+  },
+}
+
+export const MoreRows: Story = {
+  args: {
+    label: 'Detailed feedback',
+    placeholder: 'Write a few paragraphs…',
+    rows: 6,
+  },
+}
+
+/**
+ * Controlled example: interactive typing while using `value` prop.
+ * This avoids the “can’t type” issue you get when `value` is set but not updated.
+ */
+export const ControlledValue: Story = {
+  args: {
+    label: 'Notes',
+    placeholder: 'Type here…',
+    value: 'Initial value you can edit',
+    rows: 4,
+  },
+  render: (args) => {
+    const [val, setVal] = React.useState(args.value ?? '')
+
+    // keep local state in sync if someone edits args in the Controls panel
+    React.useEffect(() => {
+      setVal(args.value ?? '')
+    }, [args.value])
+
+    return <TextArea {...args} value={val} onChange={setVal} />
+  },
+}