feat: Format event price and wallet balance in PurchaseTicketDialog and events page

- Implemented formatting functions for event ticket prices and wallet balances to enhance readability and user experience.
- Updated PurchaseTicketDialog.vue and events.vue to utilize the new formatting functions, ensuring consistent display of financial information.

src/lib/utils/formatting.test.ts

@@ -0,0 +1,201 @@
+/**
+ * Test file for formatting utility functions
+ * This file can be run with a test runner or used for manual verification
+ */
+
+import { 
+  formatNumber, 
+  formatSats, 
+  formatMsats, 
+  formatCurrency, 
+  formatEventPrice, 
+  formatWalletBalance 
+} from './formatting'
+
+// Test data
+const testNumbers = [
+  0,
+  1,
+  999,
+  1000,
+  1001,
+  9999,
+  10000,
+  10001,
+  99999,
+  100000,
+  100001,
+  999999,
+  1000000,
+  1000001,
+  1234567,
+  9999999,
+  10000000
+]
+
+const testSats = [
+  0,
+  1,
+  999,
+  1000,
+  1001,
+  9999,
+  10000,
+  10001,
+  99999,
+  100000,
+  100001,
+  999999,
+  1000000,
+  1000001,
+  1234567,
+  9999999,
+  10000000
+]
+
+const testMsats = [
+  0,
+  1000,
+  999000,
+  1000000,
+  1001000,
+  9999000,
+  10000000,
+  10001000,
+  99999000,
+  100000000,
+  100001000,
+  999999000,
+  1000000000,
+  1000001000,
+  1234567000,
+  9999999000,
+  10000000000
+]
+
+const testCurrencies = [
+  { amount: 0, currency: 'USD' },
+  { amount: 1.99, currency: 'USD' },
+  { amount: 999.99, currency: 'USD' },
+  { amount: 1000, currency: 'USD' },
+  { amount: 1001.50, currency: 'USD' },
+  { amount: 9999.99, currency: 'USD' },
+  { amount: 10000, currency: 'USD' },
+  { amount: 0, currency: 'EUR' },
+  { amount: 1.99, currency: 'EUR' },
+  { amount: 999.99, currency: 'EUR' },
+  { amount: 1000, currency: 'EUR' }
+]
+
+const testEventPrices = [
+  { price: 0, currency: 'sats' },
+  { price: 1, currency: 'sats' },
+  { price: 999, currency: 'sats' },
+  { price: 1000, currency: 'sats' },
+  { price: 1001, currency: 'sats' },
+  { price: 9999, currency: 'sats' },
+  { price: 10000, currency: 'sats' },
+  { price: 0, currency: 'USD' },
+  { price: 1.99, currency: 'USD' },
+  { price: 999.99, currency: 'USD' },
+  { price: 1000, currency: 'USD' },
+  { price: 0, currency: 'EUR' },
+  { price: 1.99, currency: 'EUR' },
+  { price: 999.99, currency: 'EUR' },
+  { price: 1000, currency: 'EUR' }
+]
+
+// Test functions
+function testFormatNumber() {
+  console.log('Testing formatNumber function:')
+  testNumbers.forEach(num => {
+    const formatted = formatNumber(num)
+    console.log(`${num} -> "${formatted}"`)
+  })
+  console.log('')
+}
+
+function testFormatSats() {
+  console.log('Testing formatSats function:')
+  testSats.forEach(sats => {
+    const formatted = formatSats(sats)
+    console.log(`${sats} sats -> "${formatted}"`)
+  })
+  console.log('')
+}
+
+function testFormatMsats() {
+  console.log('Testing formatMsats function:')
+  testMsats.forEach(msats => {
+    const formatted = formatMsats(msats)
+    console.log(`${msats} msats -> "${formatted}"`)
+  })
+  console.log('')
+}
+
+function testFormatCurrency() {
+  console.log('Testing formatCurrency function:')
+  testCurrencies.forEach(({ amount, currency }) => {
+    const formatted = formatCurrency(amount, currency)
+    console.log(`${amount} ${currency} -> "${formatted}"`)
+  })
+  console.log('')
+}
+
+function testFormatEventPrice() {
+  console.log('Testing formatEventPrice function:')
+  testEventPrices.forEach(({ price, currency }) => {
+    const formatted = formatEventPrice(price, currency)
+    console.log(`${price} ${currency} -> "${formatted}"`)
+  })
+  console.log('')
+}
+
+function testFormatWalletBalance() {
+  console.log('Testing formatWalletBalance function:')
+  testMsats.forEach(msats => {
+    const formatted = formatWalletBalance(msats)
+    console.log(`${msats} msats -> "${formatted}"`)
+  })
+  console.log('')
+}
+
+// Run all tests
+function runAllTests() {
+  console.log('=== FORMATTING UTILITY TESTS ===\n')
+  
+  testFormatNumber()
+  testFormatSats()
+  testFormatMsats()
+  testFormatCurrency()
+  testFormatEventPrice()
+  testFormatWalletBalance()
+  
+  console.log('=== TESTS COMPLETED ===')
+}
+
+// Export for manual testing
+export {
+  runAllTests,
+  testFormatNumber,
+  testFormatSats,
+  testFormatMsats,
+  testFormatCurrency,
+  testFormatEventPrice,
+  testFormatWalletBalance
+}
+
+// Run tests if this file is executed directly
+if (typeof window !== 'undefined') {
+  // Browser environment - add to window for console testing
+  (window as any).formattingTests = {
+    runAllTests,
+    testFormatNumber,
+    testFormatSats,
+    testFormatMsats,
+    testFormatCurrency,
+    testFormatEventPrice,
+    testFormatWalletBalance
+  }
+  console.log('Formatting tests available at window.formattingTests')
+}