Added complete manual print dialog to Web UI based on fManualPrint.cs:
- Created ManualPrintDialog component with all input fields (SID, Vendor Lot, Qty, MFG Date, Reel ID, Supplier, Part No)
- Added printer selection (Left/Right), print count, delete after print checkbox, and barcode input
- Implemented ExecuteManualPrint backend method with ZPL label generation and printer integration
- Added WebSocketServer handler for EXECUTE_MANUAL_PRINT command with full parameter support
- Integrated dialog into Header component with proper error handling via AlertContext
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>