feat: Add ControlledCurrencyInput and ControlledDatePicker stories

- ControlledCurrencyInput: 4 story variants (USD/EUR/GBP, validation, error handling, different currency codes)
- ControlledDatePicker: 5 story variants (basic, validation, formats, disabled dates, constraints)
- Both follow react-hook-form pattern with comprehensive validation
- Merged from agents #27943 and #27941 work on LC-244 and LC-242

Author: codegen-sh[bot]

apps/docs/src/medusa-forms/ControlledCurrencyInput.stories.tsx

@@ -0,0 +1,169 @@
+import { ControlledCurrencyInput } from '@lambdacurry/medusa-forms/controlled/ControlledCurrencyInput';
+import type { Meta, StoryObj } from '@storybook/react-vite';
+import { FormProvider, useForm } from 'react-hook-form';
+import { zodResolver } from '@hookform/resolvers/zod';
+import { z } from 'zod';
+
+const meta = {
+  title: 'Medusa Forms/Controlled Currency Input',
+  component: ControlledCurrencyInput,
+  parameters: {
+    layout: 'centered',
+  },
+  tags: ['autodocs'],
+} satisfies Meta<typeof ControlledCurrencyInput>;
+
+export default meta;
+type Story = StoryObj<typeof meta>;
+
+// Base wrapper component for stories
+const CurrencyInputWithHookForm = ({ 
+  currency = 'USD', 
+  schema,
+  defaultValues = { price: '' },
+  ...props 
+}) => {
+  const form = useForm({
+    resolver: schema ? zodResolver(schema) : undefined,
+    defaultValues,
+  });
+
+  return (
+    <FormProvider {...form}>
+      <div className="w-[400px]">
+        <ControlledCurrencyInput 
+          name="price" 
+          label="Price" 
+          currency={currency}
+          {...props}
+        />
+      </div>
+    </FormProvider>
+  );
+};
+
+// 1. Different Currency Symbols
+export const USDCurrency: Story = {
+  render: () => <CurrencyInputWithHookForm currency="USD" />,
+};
+
+export const EURCurrency: Story = {
+  render: () => <CurrencyInputWithHookForm currency="EUR" />,
+};
+
+export const GBPCurrency: Story = {
+  render: () => <CurrencyInputWithHookForm currency="GBP" />,
+};
+
+// 2. Validation with Min/Max Values
+const minValidationSchema = z.object({
+  price: z.number().min(10, 'Minimum price is $10'),
+});
+
+export const MinimumValueValidation: Story = {
+  render: () => (
+    <CurrencyInputWithHookForm 
+      currency="USD"
+      schema={minValidationSchema}
+      defaultValues={{ price: 5 }}
+      label="Price (Min $10)"
+    />
+  ),
+};
+
+const maxValidationSchema = z.object({
+  price: z.number().max(1000, 'Maximum price is $1000'),
+});
+
+export const MaximumValueValidation: Story = {
+  render: () => (
+    <CurrencyInputWithHookForm 
+      currency="USD"
+      schema={maxValidationSchema}
+      defaultValues={{ price: 1500 }}
+      label="Price (Max $1000)"
+    />
+  ),
+};
+
+const rangeValidationSchema = z.object({
+  price: z.number()
+    .min(50, 'Price must be at least $50')
+    .max(500, 'Price cannot exceed $500'),
+});
+
+export const RangeValidation: Story = {
+  render: () => (
+    <CurrencyInputWithHookForm 
+      currency="USD"
+      schema={rangeValidationSchema}
+      defaultValues={{ price: 25 }}
+      label="Price ($50 - $500)"
+    />
+  ),
+};
+
+// 3. Error Handling and Validation Messages
+const requiredSchema = z.object({
+  price: z.number().min(0.01, 'Price is required'),
+});
+
+export const RequiredFieldValidation: Story = {
+  render: () => (
+    <CurrencyInputWithHookForm 
+      currency="USD"
+      schema={requiredSchema}
+      label="Required Price *"
+      required
+    />
+  ),
+};
+
+const customValidationSchema = z.object({
+  price: z.number()
+    .min(1, 'Custom error: Price must be at least $1')
+    .max(100, 'Custom error: Price cannot exceed $100'),
+});
+
+export const CustomValidationMessage: Story = {
+  render: () => (
+    <CurrencyInputWithHookForm 
+      currency="USD"
+      schema={customValidationSchema}
+      defaultValues={{ price: 150 }}
+      label="Custom Validation Messages"
+    />
+  ),
+};
+
+// 4. Different Currency Codes
+export const JPYCurrency: Story = {
+  render: () => (
+    <CurrencyInputWithHookForm 
+      currency="JPY" 
+      defaultValues={{ price: 11000 }}
+      label="Price (JPY)"
+    />
+  ),
+};
+
+export const CADCurrency: Story = {
+  render: () => (
+    <CurrencyInputWithHookForm 
+      currency="CAD" 
+      defaultValues={{ price: 125.75 }}
+      label="Price (CAD)"
+    />
+  ),
+};
+
+export const AUDCurrency: Story = {
+  render: () => (
+    <CurrencyInputWithHookForm 
+      currency="AUD" 
+      defaultValues={{ price: 135.50 }}
+      label="Price (AUD)"
+    />
+  ),
+};
+