Fix multiple TeleBot and admin panel issues

- Fix admin panel to show all pending orders (PendingPayment + PaymentReceived)
- Fix currency display from USD ($) to GBP (£) throughout TeleBot
- Update payment methods to use dynamic SilverPay currency list
- Consolidate shipping address collection into single message
- Implement cart backup/restore on payment failure
- Remove unsupported XMR from TeleBot config

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

LittleShop/Controllers/CurrencyController.cs

@@ -32,23 +32,27 @@ public class CurrencyController : ControllerBase
             // Get SilverPay supported currencies
             var silverPayCurrencies = await _silverPayService.GetSupportedCurrenciesAsync();
 
-            // Production currencies (always enabled if supported by SilverPay)
-            var productionCurrencies = new[] { "BTC", "ETH" };
-            foreach (var currency in productionCurrencies)
-            {
-                if (silverPayCurrencies.Contains(currency))
-                {
-                    availableCurrencies.Add(currency);
-                }
-            }
+            // Test currencies that should be excluded unless explicitly enabled
+            var testCurrencies = new[] { "TBTC", "TETH", "TLTC", "TESTBTC", "TESTNET" };
 
-            // Test currencies (enabled via admin settings)
-            var testCurrencies = new[] { "TBTC", "TLTC" };
-            foreach (var currency in testCurrencies)
+            // Add all SilverPay supported currencies except test ones
+            foreach (var currency in silverPayCurrencies)
             {
-                if (silverPayCurrencies.Contains(currency) &&
-                    await _systemSettingsService.IsTestCurrencyEnabledAsync(currency))
+                var isTestCurrency = testCurrencies.Any(tc =>
+                    currency.Contains(tc, StringComparison.OrdinalIgnoreCase) ||
+                    currency.StartsWith("T", StringComparison.OrdinalIgnoreCase));
+
+                if (isTestCurrency)
                 {
+                    // Only add test currencies if explicitly enabled in settings
+                    if (await _systemSettingsService.IsTestCurrencyEnabledAsync(currency))
+                    {
+                        availableCurrencies.Add(currency);
+                    }
+                }
+                else
+                {
+                    // Add all production currencies
                     availableCurrencies.Add(currency);
                 }
             }