## Bug Fix
### Problem
Deployment failed with error:
```
[INSTALLATION FAILED] You cannot call a method on a null-valued expression.
at Install-BackendFirstTime, line 611
```
The error occurred at line 611:
```powershell
& nssm install $Config.BackendServiceName $pythonPath "-m" "uvicorn" ... "--port" $Config.BackendPort.ToString()
```
### Root Cause
Global configuration was missing required properties used by service installation functions:
- `$Config.BackendPort` - used in NSSM service creation (line 611)
- `$Config.BackendServiceDisplayName` - used for service display name (line 612)
- `$Config.BackendServiceDescription` - used for service description (line 613)
- `$Config.TelegramBotServiceDisplayName` - used in telegram bot service (line 816)
- `$Config.TelegramBotServiceDescription` - used in telegram bot service (line 817)
- `$Config.TelegramBotPort` - added for consistency (not yet used)
When the script tried to call `.ToString()` on `$Config.BackendPort`, it was null, causing the error.
### Solution
Added missing properties to `$script:Config` hashtable (lines 63-96):
**Backend properties:**
- `BackendPort = 8000`
- `BackendServiceDisplayName = "ROA2WEB Backend API"`
- `BackendServiceDescription = "FastAPI backend service for ROA2WEB application"`
**Telegram Bot properties:**
- `TelegramBotPort = 8002`
- `TelegramBotServiceDisplayName = "ROA2WEB Telegram Bot"`
- `TelegramBotServiceDescription = "Telegram bot frontend for ROA2WEB application"`
### Impact
- Backend service creation now works correctly with proper port configuration
- Service display names and descriptions are properly set in Windows Services
- Configuration is now complete and consistent
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
Marius Mutu
6c71f73740