Add Pending Payment tab and rebrand to TeleShop Admin

- Added new 'Pending Payment' tab to show orders awaiting payment (4 orders)
- Rebranded admin panel from 'LittleShop Admin' to 'TeleShop Admin'
- Updated login page, layout, and dashboard with new branding
- Fixed visibility issue where PendingPayment orders had no tab
- All 13 orders are now visible across appropriate tabs

🤖 Generated with Claude Code

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

LittleShop/Areas/Admin/Views/Dashboard/Index.cshtml

@@ -157,11 +157,11 @@ document.addEventListener('DOMContentLoaded', function() {
             }
             
             // Show manual install instructions
-            alert(`To install LittleShop Admin as an app:
+            alert(`To install TeleShop Admin as an app:
 
 🌐 Chrome/Edge:
 1. Click the install icon (⊞) in the address bar, OR
-2. Menu (⋮) → "Install LittleShop Admin"
+2. Menu (⋮) → "Install TeleShop Admin"
 
 🍎 Safari (iOS):
 1. Share button → "Add to Home Screen"